From a73a964e51247ed169d322c725a3a18859f109a3 Mon Sep 17 00:00:00 2001 From: Ori Bernstein Date: Mon, 14 Jun 2021 00:00:37 +0000 Subject: python, hg: tow outside the environment. they've served us well, and can ride off into the sunset. --- sys/src/cmd/python/Python/ceval.c | 4351 ------------------------------------- 1 file changed, 4351 deletions(-) delete mode 100644 sys/src/cmd/python/Python/ceval.c (limited to 'sys/src/cmd/python/Python/ceval.c') diff --git a/sys/src/cmd/python/Python/ceval.c b/sys/src/cmd/python/Python/ceval.c deleted file mode 100644 index 597ae481f..000000000 --- a/sys/src/cmd/python/Python/ceval.c +++ /dev/null @@ -1,4351 +0,0 @@ - -/* Execute compiled code */ - -/* XXX TO DO: - XXX speed up searching for keywords by using a dictionary - XXX document it! - */ - -/* enable more aggressive intra-module optimizations, where available */ -#define PY_LOCAL_AGGRESSIVE - -#include "Python.h" - -#include "code.h" -#include "frameobject.h" -#include "eval.h" -#include "opcode.h" -#include "structmember.h" - -#include - -#ifndef WITH_TSC - -#define READ_TIMESTAMP(var) - -#else - -typedef unsigned long long uint64; - -#if defined(__ppc__) /* <- Don't know if this is the correct symbol; this - section should work for GCC on any PowerPC platform, - irrespective of OS. POWER? Who knows :-) */ - -#define READ_TIMESTAMP(var) ppc_getcounter(&var) - -static void -ppc_getcounter(uint64 *v) -{ - register unsigned long tbu, tb, tbu2; - - loop: - asm volatile ("mftbu %0" : "=r" (tbu) ); - asm volatile ("mftb %0" : "=r" (tb) ); - asm volatile ("mftbu %0" : "=r" (tbu2)); - if (__builtin_expect(tbu != tbu2, 0)) goto loop; - - /* The slightly peculiar way of writing the next lines is - compiled better by GCC than any other way I tried. */ - ((long*)(v))[0] = tbu; - ((long*)(v))[1] = tb; -} - -#else /* this is for linux/x86 (and probably any other GCC/x86 combo) */ - -#define READ_TIMESTAMP(val) \ - __asm__ __volatile__("rdtsc" : "=A" (val)) - -#endif - -void dump_tsc(int opcode, int ticked, uint64 inst0, uint64 inst1, - uint64 loop0, uint64 loop1, uint64 intr0, uint64 intr1) -{ - uint64 intr, inst, loop; - PyThreadState *tstate = PyThreadState_Get(); - if (!tstate->interp->tscdump) - return; - intr = intr1 - intr0; - inst = inst1 - inst0 - intr; - loop = loop1 - loop0 - intr; - fprintf(stderr, "opcode=%03d t=%d inst=%06lld loop=%06lld\n", - opcode, ticked, inst, loop); -} - -#endif - -/* Turn this on if your compiler chokes on the big switch: */ -/* #define CASE_TOO_BIG 1 */ - -#ifdef Py_DEBUG -/* For debugging the interpreter: */ -#define LLTRACE 1 /* Low-level trace feature */ -#define CHECKEXC 1 /* Double-check exception checking */ -#endif - -typedef PyObject *(*callproc)(PyObject *, PyObject *, PyObject *); - -/* Forward declarations */ -#ifdef WITH_TSC -static PyObject * call_function(PyObject ***, int, uint64*, uint64*); -#else -static PyObject * call_function(PyObject ***, int); -#endif -static PyObject * fast_function(PyObject *, PyObject ***, int, int, int); -static PyObject * do_call(PyObject *, PyObject ***, int, int); -static PyObject * ext_do_call(PyObject *, PyObject ***, int, int, int); -static PyObject * update_keyword_args(PyObject *, int, PyObject ***,PyObject *); -static PyObject * update_star_args(int, int, PyObject *, PyObject ***); -static PyObject * load_args(PyObject ***, int); -#define CALL_FLAG_VAR 1 -#define CALL_FLAG_KW 2 - -#ifdef LLTRACE -static int lltrace; -static int prtrace(PyObject *, char *); -#endif -static int call_trace(Py_tracefunc, PyObject *, PyFrameObject *, - int, PyObject *); -static void call_trace_protected(Py_tracefunc, PyObject *, - PyFrameObject *, int, PyObject *); -static void call_exc_trace(Py_tracefunc, PyObject *, PyFrameObject *); -static int maybe_call_line_trace(Py_tracefunc, PyObject *, - PyFrameObject *, int *, int *, int *); - -static PyObject * apply_slice(PyObject *, PyObject *, PyObject *); -static int assign_slice(PyObject *, PyObject *, - PyObject *, PyObject *); -static PyObject * cmp_outcome(int, PyObject *, PyObject *); -static PyObject * import_from(PyObject *, PyObject *); -static int import_all_from(PyObject *, PyObject *); -static PyObject * build_class(PyObject *, PyObject *, PyObject *); -static int exec_statement(PyFrameObject *, - PyObject *, PyObject *, PyObject *); -static void set_exc_info(PyThreadState *, PyObject *, PyObject *, PyObject *); -static void reset_exc_info(PyThreadState *); -static void format_exc_check_arg(PyObject *, char *, PyObject *); -static PyObject * string_concatenate(PyObject *, PyObject *, - PyFrameObject *, unsigned char *); - -#define NAME_ERROR_MSG \ - "name '%.200s' is not defined" -#define GLOBAL_NAME_ERROR_MSG \ - "global name '%.200s' is not defined" -#define UNBOUNDLOCAL_ERROR_MSG \ - "local variable '%.200s' referenced before assignment" -#define UNBOUNDFREE_ERROR_MSG \ - "free variable '%.200s' referenced before assignment" \ - " in enclosing scope" - -/* Dynamic execution profile */ -#ifdef DYNAMIC_EXECUTION_PROFILE -#ifdef DXPAIRS -static long dxpairs[257][256]; -#define dxp dxpairs[256] -#else -static long dxp[256]; -#endif -#endif - -/* Function call profile */ -#ifdef CALL_PROFILE -#define PCALL_NUM 11 -static int pcall[PCALL_NUM]; - -#define PCALL_ALL 0 -#define PCALL_FUNCTION 1 -#define PCALL_FAST_FUNCTION 2 -#define PCALL_FASTER_FUNCTION 3 -#define PCALL_METHOD 4 -#define PCALL_BOUND_METHOD 5 -#define PCALL_CFUNCTION 6 -#define PCALL_TYPE 7 -#define PCALL_GENERATOR 8 -#define PCALL_OTHER 9 -#define PCALL_POP 10 - -/* Notes about the statistics - - PCALL_FAST stats - - FAST_FUNCTION means no argument tuple needs to be created. - FASTER_FUNCTION means that the fast-path frame setup code is used. - - If there is a method call where the call can be optimized by changing - the argument tuple and calling the function directly, it gets recorded - twice. - - As a result, the relationship among the statistics appears to be - PCALL_ALL == PCALL_FUNCTION + PCALL_METHOD - PCALL_BOUND_METHOD + - PCALL_CFUNCTION + PCALL_TYPE + PCALL_GENERATOR + PCALL_OTHER - PCALL_FUNCTION > PCALL_FAST_FUNCTION > PCALL_FASTER_FUNCTION - PCALL_METHOD > PCALL_BOUND_METHOD -*/ - -#define PCALL(POS) pcall[POS]++ - -PyObject * -PyEval_GetCallStats(PyObject *self) -{ - return Py_BuildValue("iiiiiiiiiii", - pcall[0], pcall[1], pcall[2], pcall[3], - pcall[4], pcall[5], pcall[6], pcall[7], - pcall[8], pcall[9], pcall[10]); -} -#else -#define PCALL(O) - -PyObject * -PyEval_GetCallStats(PyObject *self) -{ - Py_INCREF(Py_None); - return Py_None; -} -#endif - - -#ifdef WITH_THREAD - -#ifdef HAVE_ERRNO_H -#include -#endif -#include "pythread.h" - -static PyThread_type_lock interpreter_lock = 0; /* This is the GIL */ -static long main_thread = 0; - -int -PyEval_ThreadsInitialized(void) -{ - return interpreter_lock != 0; -} - -void -PyEval_InitThreads(void) -{ - if (interpreter_lock) - return; - interpreter_lock = PyThread_allocate_lock(); - PyThread_acquire_lock(interpreter_lock, 1); - main_thread = PyThread_get_thread_ident(); -} - -void -PyEval_AcquireLock(void) -{ - PyThread_acquire_lock(interpreter_lock, 1); -} - -void -PyEval_ReleaseLock(void) -{ - PyThread_release_lock(interpreter_lock); -} - -void -PyEval_AcquireThread(PyThreadState *tstate) -{ - if (tstate == NULL) - Py_FatalError("PyEval_AcquireThread: NULL new thread state"); - /* Check someone has called PyEval_InitThreads() to create the lock */ - assert(interpreter_lock); - PyThread_acquire_lock(interpreter_lock, 1); - if (PyThreadState_Swap(tstate) != NULL) - Py_FatalError( - "PyEval_AcquireThread: non-NULL old thread state"); -} - -void -PyEval_ReleaseThread(PyThreadState *tstate) -{ - if (tstate == NULL) - Py_FatalError("PyEval_ReleaseThread: NULL thread state"); - if (PyThreadState_Swap(NULL) != tstate) - Py_FatalError("PyEval_ReleaseThread: wrong thread state"); - PyThread_release_lock(interpreter_lock); -} - -/* This function is called from PyOS_AfterFork to ensure that newly - created child processes don't hold locks referring to threads which - are not running in the child process. (This could also be done using - pthread_atfork mechanism, at least for the pthreads implementation.) */ - -void -PyEval_ReInitThreads(void) -{ - if (!interpreter_lock) - return; - /*XXX Can't use PyThread_free_lock here because it does too - much error-checking. Doing this cleanly would require - adding a new function to each thread_*.h. Instead, just - create a new lock and waste a little bit of memory */ - interpreter_lock = PyThread_allocate_lock(); - PyThread_acquire_lock(interpreter_lock, 1); - main_thread = PyThread_get_thread_ident(); -} -#endif - -/* Functions save_thread and restore_thread are always defined so - dynamically loaded modules needn't be compiled separately for use - with and without threads: */ - -PyThreadState * -PyEval_SaveThread(void) -{ - PyThreadState *tstate = PyThreadState_Swap(NULL); - if (tstate == NULL) - Py_FatalError("PyEval_SaveThread: NULL tstate"); -#ifdef WITH_THREAD - if (interpreter_lock) - PyThread_release_lock(interpreter_lock); -#endif - return tstate; -} - -void -PyEval_RestoreThread(PyThreadState *tstate) -{ - if (tstate == NULL) - Py_FatalError("PyEval_RestoreThread: NULL tstate"); -#ifdef WITH_THREAD - if (interpreter_lock) { - int err = errno; - PyThread_acquire_lock(interpreter_lock, 1); - errno = err; - } -#endif - PyThreadState_Swap(tstate); -} - - -/* Mechanism whereby asynchronously executing callbacks (e.g. UNIX - signal handlers or Mac I/O completion routines) can schedule calls - to a function to be called synchronously. - The synchronous function is called with one void* argument. - It should return 0 for success or -1 for failure -- failure should - be accompanied by an exception. - - If registry succeeds, the registry function returns 0; if it fails - (e.g. due to too many pending calls) it returns -1 (without setting - an exception condition). - - Note that because registry may occur from within signal handlers, - or other asynchronous events, calling malloc() is unsafe! - -#ifdef WITH_THREAD - Any thread can schedule pending calls, but only the main thread - will execute them. -#endif - - XXX WARNING! ASYNCHRONOUSLY EXECUTING CODE! - There are two possible race conditions: - (1) nested asynchronous registry calls; - (2) registry calls made while pending calls are being processed. - While (1) is very unlikely, (2) is a real possibility. - The current code is safe against (2), but not against (1). - The safety against (2) is derived from the fact that only one - thread (the main thread) ever takes things out of the queue. - - XXX Darn! With the advent of thread state, we should have an array - of pending calls per thread in the thread state! Later... -*/ - -#define NPENDINGCALLS 32 -static struct { - int (*func)(void *); - void *arg; -} pendingcalls[NPENDINGCALLS]; -static volatile int pendingfirst = 0; -static volatile int pendinglast = 0; -static volatile int things_to_do = 0; - -int -Py_AddPendingCall(int (*func)(void *), void *arg) -{ - static int busy = 0; - int i, j; - /* XXX Begin critical section */ - /* XXX If you want this to be safe against nested - XXX asynchronous calls, you'll have to work harder! */ - if (busy) - return -1; - busy = 1; - i = pendinglast; - j = (i + 1) % NPENDINGCALLS; - if (j == pendingfirst) { - busy = 0; - return -1; /* Queue full */ - } - pendingcalls[i].func = func; - pendingcalls[i].arg = arg; - pendinglast = j; - - _Py_Ticker = 0; - things_to_do = 1; /* Signal main loop */ - busy = 0; - /* XXX End critical section */ - return 0; -} - -int -Py_MakePendingCalls(void) -{ - static int busy = 0; -#ifdef WITH_THREAD - if (main_thread && PyThread_get_thread_ident() != main_thread) - return 0; -#endif - if (busy) - return 0; - busy = 1; - things_to_do = 0; - for (;;) { - int i; - int (*func)(void *); - void *arg; - i = pendingfirst; - if (i == pendinglast) - break; /* Queue empty */ - func = pendingcalls[i].func; - arg = pendingcalls[i].arg; - pendingfirst = (i + 1) % NPENDINGCALLS; - if (func(arg) < 0) { - busy = 0; - things_to_do = 1; /* We're not done yet */ - return -1; - } - } - busy = 0; - return 0; -} - - -/* The interpreter's recursion limit */ - -#ifndef Py_DEFAULT_RECURSION_LIMIT -#define Py_DEFAULT_RECURSION_LIMIT 1000 -#endif -static int recursion_limit = Py_DEFAULT_RECURSION_LIMIT; -int _Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT; - -int -Py_GetRecursionLimit(void) -{ - return recursion_limit; -} - -void -Py_SetRecursionLimit(int new_limit) -{ - recursion_limit = new_limit; - _Py_CheckRecursionLimit = recursion_limit; -} - -/* the macro Py_EnterRecursiveCall() only calls _Py_CheckRecursiveCall() - if the recursion_depth reaches _Py_CheckRecursionLimit. - If USE_STACKCHECK, the macro decrements _Py_CheckRecursionLimit - to guarantee that _Py_CheckRecursiveCall() is regularly called. - Without USE_STACKCHECK, there is no need for this. */ -int -_Py_CheckRecursiveCall(char *where) -{ - PyThreadState *tstate = PyThreadState_GET(); - -#ifdef USE_STACKCHECK - if (PyOS_CheckStack()) { - --tstate->recursion_depth; - PyErr_SetString(PyExc_MemoryError, "Stack overflow"); - return -1; - } -#endif - if (tstate->recursion_depth > recursion_limit) { - --tstate->recursion_depth; - PyErr_Format(PyExc_RuntimeError, - "maximum recursion depth exceeded%s", - where); - return -1; - } - _Py_CheckRecursionLimit = recursion_limit; - return 0; -} - -/* Status code for main loop (reason for stack unwind) */ -enum why_code { - WHY_NOT = 0x0001, /* No error */ - WHY_EXCEPTION = 0x0002, /* Exception occurred */ - WHY_RERAISE = 0x0004, /* Exception re-raised by 'finally' */ - WHY_RETURN = 0x0008, /* 'return' statement */ - WHY_BREAK = 0x0010, /* 'break' statement */ - WHY_CONTINUE = 0x0020, /* 'continue' statement */ - WHY_YIELD = 0x0040 /* 'yield' operator */ -}; - -static enum why_code do_raise(PyObject *, PyObject *, PyObject *); -static int unpack_iterable(PyObject *, int, PyObject **); - -/* for manipulating the thread switch and periodic "stuff" - used to be - per thread, now just a pair o' globals */ -int _Py_CheckInterval = 100; -volatile int _Py_Ticker = 100; - -PyObject * -PyEval_EvalCode(PyCodeObject *co, PyObject *globals, PyObject *locals) -{ - /* XXX raise SystemError if globals is NULL */ - return PyEval_EvalCodeEx(co, - globals, locals, - (PyObject **)NULL, 0, - (PyObject **)NULL, 0, - (PyObject **)NULL, 0, - NULL); -} - - -/* Interpreter main loop */ - -PyObject * -PyEval_EvalFrame(PyFrameObject *f) { - /* This is for backward compatibility with extension modules that - used this API; core interpreter code should call PyEval_EvalFrameEx() */ - return PyEval_EvalFrameEx(f, 0); -} - -PyObject * -PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) -{ -#ifdef DXPAIRS - int lastopcode = 0; -#endif - register PyObject **stack_pointer; /* Next free slot in value stack */ - register unsigned char *next_instr; - register int opcode; /* Current opcode */ - register int oparg; /* Current opcode argument, if any */ - register enum why_code why; /* Reason for block stack unwind */ - register int err; /* Error status -- nonzero if error */ - register PyObject *x; /* Result object -- NULL if error */ - register PyObject *v; /* Temporary objects popped off stack */ - register PyObject *w; - register PyObject *u; - register PyObject *t; - register PyObject *stream = NULL; /* for PRINT opcodes */ - register PyObject **fastlocals, **freevars; - PyObject *retval = NULL; /* Return value */ - PyThreadState *tstate = PyThreadState_GET(); - PyCodeObject *co; - - /* when tracing we set things up so that - - not (instr_lb <= current_bytecode_offset < instr_ub) - - is true when the line being executed has changed. The - initial values are such as to make this false the first - time it is tested. */ - int instr_ub = -1, instr_lb = 0, instr_prev = -1; - - unsigned char *first_instr; - PyObject *names; - PyObject *consts; -#if defined(Py_DEBUG) || defined(LLTRACE) - /* Make it easier to find out where we are with a debugger */ - char *filename; -#endif - -/* Tuple access macros */ - -#ifndef Py_DEBUG -#define GETITEM(v, i) PyTuple_GET_ITEM((PyTupleObject *)(v), (i)) -#else -#define GETITEM(v, i) PyTuple_GetItem((v), (i)) -#endif - -#ifdef WITH_TSC -/* Use Pentium timestamp counter to mark certain events: - inst0 -- beginning of switch statement for opcode dispatch - inst1 -- end of switch statement (may be skipped) - loop0 -- the top of the mainloop - loop1 -- place where control returns again to top of mainloop - (may be skipped) - intr1 -- beginning of long interruption - intr2 -- end of long interruption - - Many opcodes call out to helper C functions. In some cases, the - time in those functions should be counted towards the time for the - opcode, but not in all cases. For example, a CALL_FUNCTION opcode - calls another Python function; there's no point in charge all the - bytecode executed by the called function to the caller. - - It's hard to make a useful judgement statically. In the presence - of operator overloading, it's impossible to tell if a call will - execute new Python code or not. - - It's a case-by-case judgement. I'll use intr1 for the following - cases: - - EXEC_STMT - IMPORT_STAR - IMPORT_FROM - CALL_FUNCTION (and friends) - - */ - uint64 inst0, inst1, loop0, loop1, intr0 = 0, intr1 = 0; - int ticked = 0; - - READ_TIMESTAMP(inst0); - READ_TIMESTAMP(inst1); - READ_TIMESTAMP(loop0); - READ_TIMESTAMP(loop1); - - /* shut up the compiler */ - opcode = 0; -#endif - -/* Code access macros */ - -#define INSTR_OFFSET() ((int)(next_instr - first_instr)) -#define NEXTOP() (*next_instr++) -#define NEXTARG() (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2]) -#define PEEKARG() ((next_instr[2]<<8) + next_instr[1]) -#define JUMPTO(x) (next_instr = first_instr + (x)) -#define JUMPBY(x) (next_instr += (x)) - -/* OpCode prediction macros - Some opcodes tend to come in pairs thus making it possible to predict - the second code when the first is run. For example, COMPARE_OP is often - followed by JUMP_IF_FALSE or JUMP_IF_TRUE. And, those opcodes are often - followed by a POP_TOP. - - Verifying the prediction costs a single high-speed test of register - variable against a constant. If the pairing was good, then the - processor has a high likelihood of making its own successful branch - prediction which results in a nearly zero overhead transition to the - next opcode. - - A successful prediction saves a trip through the eval-loop including - its two unpredictable branches, the HASARG test and the switch-case. - - If collecting opcode statistics, turn off prediction so that - statistics are accurately maintained (the predictions bypass - the opcode frequency counter updates). -*/ - -#ifdef DYNAMIC_EXECUTION_PROFILE -#define PREDICT(op) if (0) goto PRED_##op -#else -#define PREDICT(op) if (*next_instr == op) goto PRED_##op -#endif - -#define PREDICTED(op) PRED_##op: next_instr++ -#define PREDICTED_WITH_ARG(op) PRED_##op: oparg = PEEKARG(); next_instr += 3 - -/* Stack manipulation macros */ - -/* The stack can grow at most MAXINT deep, as co_nlocals and - co_stacksize are ints. */ -#define STACK_LEVEL() ((int)(stack_pointer - f->f_valuestack)) -#define EMPTY() (STACK_LEVEL() == 0) -#define TOP() (stack_pointer[-1]) -#define SECOND() (stack_pointer[-2]) -#define THIRD() (stack_pointer[-3]) -#define FOURTH() (stack_pointer[-4]) -#define SET_TOP(v) (stack_pointer[-1] = (v)) -#define SET_SECOND(v) (stack_pointer[-2] = (v)) -#define SET_THIRD(v) (stack_pointer[-3] = (v)) -#define SET_FOURTH(v) (stack_pointer[-4] = (v)) -#define BASIC_STACKADJ(n) (stack_pointer += n) -#define BASIC_PUSH(v) (*stack_pointer++ = (v)) -#define BASIC_POP() (*--stack_pointer) - -#ifdef LLTRACE -#define PUSH(v) { (void)(BASIC_PUSH(v), \ - lltrace && prtrace(TOP(), "push")); \ - assert(STACK_LEVEL() <= co->co_stacksize); } -#define POP() ((void)(lltrace && prtrace(TOP(), "pop")), BASIC_POP()) -#define STACKADJ(n) { (void)(BASIC_STACKADJ(n), \ - lltrace && prtrace(TOP(), "stackadj")); \ - assert(STACK_LEVEL() <= co->co_stacksize); } -#define EXT_POP(STACK_POINTER) (lltrace && prtrace(*(STACK_POINTER), "ext_pop"), *--(STACK_POINTER)) -#else -#define PUSH(v) BASIC_PUSH(v) -#define POP() BASIC_POP() -#define STACKADJ(n) BASIC_STACKADJ(n) -#define EXT_POP(STACK_POINTER) (*--(STACK_POINTER)) -#endif - -/* Local variable macros */ - -#define GETLOCAL(i) (fastlocals[i]) - -/* The SETLOCAL() macro must not DECREF the local variable in-place and - then store the new value; it must copy the old value to a temporary - value, then store the new value, and then DECREF the temporary value. - This is because it is possible that during the DECREF the frame is - accessed by other code (e.g. a __del__ method or gc.collect()) and the - variable would be pointing to already-freed memory. */ -#define SETLOCAL(i, value) do { PyObject *tmp = GETLOCAL(i); \ - GETLOCAL(i) = value; \ - Py_XDECREF(tmp); } while (0) - -/* Start of code */ - - if (f == NULL) - return NULL; - - /* push frame */ - if (Py_EnterRecursiveCall("")) - return NULL; - - tstate->frame = f; - - if (tstate->use_tracing) { - if (tstate->c_tracefunc != NULL) { - /* tstate->c_tracefunc, if defined, is a - function that will be called on *every* entry - to a code block. Its return value, if not - None, is a function that will be called at - the start of each executed line of code. - (Actually, the function must return itself - in order to continue tracing.) The trace - functions are called with three arguments: - a pointer to the current frame, a string - indicating why the function is called, and - an argument which depends on the situation. - The global trace function is also called - whenever an exception is detected. */ - if (call_trace(tstate->c_tracefunc, tstate->c_traceobj, - f, PyTrace_CALL, Py_None)) { - /* Trace function raised an error */ - goto exit_eval_frame; - } - } - if (tstate->c_profilefunc != NULL) { - /* Similar for c_profilefunc, except it needn't - return itself and isn't called for "line" events */ - if (call_trace(tstate->c_profilefunc, - tstate->c_profileobj, - f, PyTrace_CALL, Py_None)) { - /* Profile function raised an error */ - goto exit_eval_frame; - } - } - } - - co = f->f_code; - names = co->co_names; - consts = co->co_consts; - fastlocals = f->f_localsplus; - freevars = f->f_localsplus + co->co_nlocals; - first_instr = (unsigned char*) PyString_AS_STRING(co->co_code); - /* An explanation is in order for the next line. - - f->f_lasti now refers to the index of the last instruction - executed. You might think this was obvious from the name, but - this wasn't always true before 2.3! PyFrame_New now sets - f->f_lasti to -1 (i.e. the index *before* the first instruction) - and YIELD_VALUE doesn't fiddle with f_lasti any more. So this - does work. Promise. */ - next_instr = first_instr + f->f_lasti + 1; - stack_pointer = f->f_stacktop; - assert(stack_pointer != NULL); - f->f_stacktop = NULL; /* remains NULL unless yield suspends frame */ - -#ifdef LLTRACE - lltrace = PyDict_GetItemString(f->f_globals, "__lltrace__") != NULL; -#endif -#if defined(Py_DEBUG) || defined(LLTRACE) - filename = PyString_AsString(co->co_filename); -#endif - - why = WHY_NOT; - err = 0; - x = Py_None; /* Not a reference, just anything non-NULL */ - w = NULL; - - if (throwflag) { /* support for generator.throw() */ - why = WHY_EXCEPTION; - goto on_error; - } - - for (;;) { -#ifdef WITH_TSC - if (inst1 == 0) { - /* Almost surely, the opcode executed a break - or a continue, preventing inst1 from being set - on the way out of the loop. - */ - READ_TIMESTAMP(inst1); - loop1 = inst1; - } - dump_tsc(opcode, ticked, inst0, inst1, loop0, loop1, - intr0, intr1); - ticked = 0; - inst1 = 0; - intr0 = 0; - intr1 = 0; - READ_TIMESTAMP(loop0); -#endif - assert(stack_pointer >= f->f_valuestack); /* else underflow */ - assert(STACK_LEVEL() <= co->co_stacksize); /* else overflow */ - - /* Do periodic things. Doing this every time through - the loop would add too much overhead, so we do it - only every Nth instruction. We also do it if - ``things_to_do'' is set, i.e. when an asynchronous - event needs attention (e.g. a signal handler or - async I/O handler); see Py_AddPendingCall() and - Py_MakePendingCalls() above. */ - - if (--_Py_Ticker < 0) { - if (*next_instr == SETUP_FINALLY) { - /* Make the last opcode before - a try: finally: block uninterruptable. */ - goto fast_next_opcode; - } - _Py_Ticker = _Py_CheckInterval; - tstate->tick_counter++; -#ifdef WITH_TSC - ticked = 1; -#endif - if (things_to_do) { - if (Py_MakePendingCalls() < 0) { - why = WHY_EXCEPTION; - goto on_error; - } - if (things_to_do) - /* MakePendingCalls() didn't succeed. - Force early re-execution of this - "periodic" code, possibly after - a thread switch */ - _Py_Ticker = 0; - } -#ifdef WITH_THREAD - if (interpreter_lock) { - /* Give another thread a chance */ - - if (PyThreadState_Swap(NULL) != tstate) - Py_FatalError("ceval: tstate mix-up"); - PyThread_release_lock(interpreter_lock); - - /* Other threads may run now */ - - PyThread_acquire_lock(interpreter_lock, 1); - if (PyThreadState_Swap(tstate) != NULL) - Py_FatalError("ceval: orphan tstate"); - - /* Check for thread interrupts */ - - if (tstate->async_exc != NULL) { - x = tstate->async_exc; - tstate->async_exc = NULL; - PyErr_SetNone(x); - Py_DECREF(x); - why = WHY_EXCEPTION; - goto on_error; - } - } -#endif - } - - fast_next_opcode: - f->f_lasti = INSTR_OFFSET(); - - /* line-by-line tracing support */ - - if (tstate->c_tracefunc != NULL && !tstate->tracing) { - /* see maybe_call_line_trace - for expository comments */ - f->f_stacktop = stack_pointer; - - err = maybe_call_line_trace(tstate->c_tracefunc, - tstate->c_traceobj, - f, &instr_lb, &instr_ub, - &instr_prev); - /* Reload possibly changed frame fields */ - JUMPTO(f->f_lasti); - if (f->f_stacktop != NULL) { - stack_pointer = f->f_stacktop; - f->f_stacktop = NULL; - } - if (err) { - /* trace function raised an exception */ - goto on_error; - } - } - - /* Extract opcode and argument */ - - opcode = NEXTOP(); - oparg = 0; /* allows oparg to be stored in a register because - it doesn't have to be remembered across a full loop */ - if (HAS_ARG(opcode)) - oparg = NEXTARG(); - dispatch_opcode: -#ifdef DYNAMIC_EXECUTION_PROFILE -#ifdef DXPAIRS - dxpairs[lastopcode][opcode]++; - lastopcode = opcode; -#endif - dxp[opcode]++; -#endif - -#ifdef LLTRACE - /* Instruction tracing */ - - if (lltrace) { - if (HAS_ARG(opcode)) { - printf("%d: %d, %d\n", - f->f_lasti, opcode, oparg); - } - else { - printf("%d: %d\n", - f->f_lasti, opcode); - } - } -#endif - - /* Main switch on opcode */ - READ_TIMESTAMP(inst0); - - switch (opcode) { - - /* BEWARE! - It is essential that any operation that fails sets either - x to NULL, err to nonzero, or why to anything but WHY_NOT, - and that no operation that succeeds does this! */ - - /* case STOP_CODE: this is an error! */ - - case NOP: - goto fast_next_opcode; - - case LOAD_FAST: - x = GETLOCAL(oparg); - if (x != NULL) { - Py_INCREF(x); - PUSH(x); - goto fast_next_opcode; - } - format_exc_check_arg(PyExc_UnboundLocalError, - UNBOUNDLOCAL_ERROR_MSG, - PyTuple_GetItem(co->co_varnames, oparg)); - break; - - case LOAD_CONST: - x = GETITEM(consts, oparg); - Py_INCREF(x); - PUSH(x); - goto fast_next_opcode; - - PREDICTED_WITH_ARG(STORE_FAST); - case STORE_FAST: - v = POP(); - SETLOCAL(oparg, v); - goto fast_next_opcode; - - PREDICTED(POP_TOP); - case POP_TOP: - v = POP(); - Py_DECREF(v); - goto fast_next_opcode; - - case ROT_TWO: - v = TOP(); - w = SECOND(); - SET_TOP(w); - SET_SECOND(v); - goto fast_next_opcode; - - case ROT_THREE: - v = TOP(); - w = SECOND(); - x = THIRD(); - SET_TOP(w); - SET_SECOND(x); - SET_THIRD(v); - goto fast_next_opcode; - - case ROT_FOUR: - u = TOP(); - v = SECOND(); - w = THIRD(); - x = FOURTH(); - SET_TOP(v); - SET_SECOND(w); - SET_THIRD(x); - SET_FOURTH(u); - goto fast_next_opcode; - - case DUP_TOP: - v = TOP(); - Py_INCREF(v); - PUSH(v); - goto fast_next_opcode; - - case DUP_TOPX: - if (oparg == 2) { - x = TOP(); - Py_INCREF(x); - w = SECOND(); - Py_INCREF(w); - STACKADJ(2); - SET_TOP(x); - SET_SECOND(w); - goto fast_next_opcode; - } else if (oparg == 3) { - x = TOP(); - Py_INCREF(x); - w = SECOND(); - Py_INCREF(w); - v = THIRD(); - Py_INCREF(v); - STACKADJ(3); - SET_TOP(x); - SET_SECOND(w); - SET_THIRD(v); - goto fast_next_opcode; - } - Py_FatalError("invalid argument to DUP_TOPX" - " (bytecode corruption?)"); - break; - - case UNARY_POSITIVE: - v = TOP(); - x = PyNumber_Positive(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) continue; - break; - - case UNARY_NEGATIVE: - v = TOP(); - x = PyNumber_Negative(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) continue; - break; - - case UNARY_NOT: - v = TOP(); - err = PyObject_IsTrue(v); - Py_DECREF(v); - if (err == 0) { - Py_INCREF(Py_True); - SET_TOP(Py_True); - continue; - } - else if (err > 0) { - Py_INCREF(Py_False); - SET_TOP(Py_False); - err = 0; - continue; - } - STACKADJ(-1); - break; - - case UNARY_CONVERT: - v = TOP(); - x = PyObject_Repr(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) continue; - break; - - case UNARY_INVERT: - v = TOP(); - x = PyNumber_Invert(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_POWER: - w = POP(); - v = TOP(); - x = PyNumber_Power(v, w, Py_None); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_MULTIPLY: - w = POP(); - v = TOP(); - x = PyNumber_Multiply(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_DIVIDE: - if (!_Py_QnewFlag) { - w = POP(); - v = TOP(); - x = PyNumber_Divide(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - } - /* -Qnew is in effect: fall through to - BINARY_TRUE_DIVIDE */ - case BINARY_TRUE_DIVIDE: - w = POP(); - v = TOP(); - x = PyNumber_TrueDivide(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_FLOOR_DIVIDE: - w = POP(); - v = TOP(); - x = PyNumber_FloorDivide(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_MODULO: - w = POP(); - v = TOP(); - x = PyNumber_Remainder(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_ADD: - w = POP(); - v = TOP(); - if (PyInt_CheckExact(v) && PyInt_CheckExact(w)) { - /* INLINE: int + int */ - register long a, b, i; - a = PyInt_AS_LONG(v); - b = PyInt_AS_LONG(w); - i = a + b; - if ((i^a) < 0 && (i^b) < 0) - goto slow_add; - x = PyInt_FromLong(i); - } - else if (PyString_CheckExact(v) && - PyString_CheckExact(w)) { - x = string_concatenate(v, w, f, next_instr); - /* string_concatenate consumed the ref to v */ - goto skip_decref_vx; - } - else { - slow_add: - x = PyNumber_Add(v, w); - } - Py_DECREF(v); - skip_decref_vx: - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_SUBTRACT: - w = POP(); - v = TOP(); - if (PyInt_CheckExact(v) && PyInt_CheckExact(w)) { - /* INLINE: int - int */ - register long a, b, i; - a = PyInt_AS_LONG(v); - b = PyInt_AS_LONG(w); - i = a - b; - if ((i^a) < 0 && (i^~b) < 0) - goto slow_sub; - x = PyInt_FromLong(i); - } - else { - slow_sub: - x = PyNumber_Subtract(v, w); - } - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_SUBSCR: - w = POP(); - v = TOP(); - if (PyList_CheckExact(v) && PyInt_CheckExact(w)) { - /* INLINE: list[int] */ - Py_ssize_t i = PyInt_AsSsize_t(w); - if (i < 0) - i += PyList_GET_SIZE(v); - if (i >= 0 && i < PyList_GET_SIZE(v)) { - x = PyList_GET_ITEM(v, i); - Py_INCREF(x); - } - else - goto slow_get; - } - else - slow_get: - x = PyObject_GetItem(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_LSHIFT: - w = POP(); - v = TOP(); - x = PyNumber_Lshift(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_RSHIFT: - w = POP(); - v = TOP(); - x = PyNumber_Rshift(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_AND: - w = POP(); - v = TOP(); - x = PyNumber_And(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_XOR: - w = POP(); - v = TOP(); - x = PyNumber_Xor(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case BINARY_OR: - w = POP(); - v = TOP(); - x = PyNumber_Or(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case LIST_APPEND: - w = POP(); - v = POP(); - err = PyList_Append(v, w); - Py_DECREF(v); - Py_DECREF(w); - if (err == 0) { - PREDICT(JUMP_ABSOLUTE); - continue; - } - break; - - case INPLACE_POWER: - w = POP(); - v = TOP(); - x = PyNumber_InPlacePower(v, w, Py_None); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_MULTIPLY: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceMultiply(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_DIVIDE: - if (!_Py_QnewFlag) { - w = POP(); - v = TOP(); - x = PyNumber_InPlaceDivide(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - } - /* -Qnew is in effect: fall through to - INPLACE_TRUE_DIVIDE */ - case INPLACE_TRUE_DIVIDE: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceTrueDivide(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_FLOOR_DIVIDE: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceFloorDivide(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_MODULO: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceRemainder(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_ADD: - w = POP(); - v = TOP(); - if (PyInt_CheckExact(v) && PyInt_CheckExact(w)) { - /* INLINE: int + int */ - register long a, b, i; - a = PyInt_AS_LONG(v); - b = PyInt_AS_LONG(w); - i = a + b; - if ((i^a) < 0 && (i^b) < 0) - goto slow_iadd; - x = PyInt_FromLong(i); - } - else if (PyString_CheckExact(v) && - PyString_CheckExact(w)) { - x = string_concatenate(v, w, f, next_instr); - /* string_concatenate consumed the ref to v */ - goto skip_decref_v; - } - else { - slow_iadd: - x = PyNumber_InPlaceAdd(v, w); - } - Py_DECREF(v); - skip_decref_v: - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_SUBTRACT: - w = POP(); - v = TOP(); - if (PyInt_CheckExact(v) && PyInt_CheckExact(w)) { - /* INLINE: int - int */ - register long a, b, i; - a = PyInt_AS_LONG(v); - b = PyInt_AS_LONG(w); - i = a - b; - if ((i^a) < 0 && (i^~b) < 0) - goto slow_isub; - x = PyInt_FromLong(i); - } - else { - slow_isub: - x = PyNumber_InPlaceSubtract(v, w); - } - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_LSHIFT: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceLshift(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_RSHIFT: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceRshift(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_AND: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceAnd(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_XOR: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceXor(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case INPLACE_OR: - w = POP(); - v = TOP(); - x = PyNumber_InPlaceOr(v, w); - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case SLICE+0: - case SLICE+1: - case SLICE+2: - case SLICE+3: - if ((opcode-SLICE) & 2) - w = POP(); - else - w = NULL; - if ((opcode-SLICE) & 1) - v = POP(); - else - v = NULL; - u = TOP(); - x = apply_slice(u, v, w); - Py_DECREF(u); - Py_XDECREF(v); - Py_XDECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case STORE_SLICE+0: - case STORE_SLICE+1: - case STORE_SLICE+2: - case STORE_SLICE+3: - if ((opcode-STORE_SLICE) & 2) - w = POP(); - else - w = NULL; - if ((opcode-STORE_SLICE) & 1) - v = POP(); - else - v = NULL; - u = POP(); - t = POP(); - err = assign_slice(u, v, w, t); /* u[v:w] = t */ - Py_DECREF(t); - Py_DECREF(u); - Py_XDECREF(v); - Py_XDECREF(w); - if (err == 0) continue; - break; - - case DELETE_SLICE+0: - case DELETE_SLICE+1: - case DELETE_SLICE+2: - case DELETE_SLICE+3: - if ((opcode-DELETE_SLICE) & 2) - w = POP(); - else - w = NULL; - if ((opcode-DELETE_SLICE) & 1) - v = POP(); - else - v = NULL; - u = POP(); - err = assign_slice(u, v, w, (PyObject *)NULL); - /* del u[v:w] */ - Py_DECREF(u); - Py_XDECREF(v); - Py_XDECREF(w); - if (err == 0) continue; - break; - - case STORE_SUBSCR: - w = TOP(); - v = SECOND(); - u = THIRD(); - STACKADJ(-3); - /* v[w] = u */ - err = PyObject_SetItem(v, w, u); - Py_DECREF(u); - Py_DECREF(v); - Py_DECREF(w); - if (err == 0) continue; - break; - - case DELETE_SUBSCR: - w = TOP(); - v = SECOND(); - STACKADJ(-2); - /* del v[w] */ - err = PyObject_DelItem(v, w); - Py_DECREF(v); - Py_DECREF(w); - if (err == 0) continue; - break; - - case PRINT_EXPR: - v = POP(); - w = PySys_GetObject("displayhook"); - if (w == NULL) { - PyErr_SetString(PyExc_RuntimeError, - "lost sys.displayhook"); - err = -1; - x = NULL; - } - if (err == 0) { - x = PyTuple_Pack(1, v); - if (x == NULL) - err = -1; - } - if (err == 0) { - w = PyEval_CallObject(w, x); - Py_XDECREF(w); - if (w == NULL) - err = -1; - } - Py_DECREF(v); - Py_XDECREF(x); - break; - - case PRINT_ITEM_TO: - w = stream = POP(); - /* fall through to PRINT_ITEM */ - - case PRINT_ITEM: - v = POP(); - if (stream == NULL || stream == Py_None) { - w = PySys_GetObject("stdout"); - if (w == NULL) { - PyErr_SetString(PyExc_RuntimeError, - "lost sys.stdout"); - err = -1; - } - } - /* PyFile_SoftSpace() can exececute arbitrary code - if sys.stdout is an instance with a __getattr__. - If __getattr__ raises an exception, w will - be freed, so we need to prevent that temporarily. */ - Py_XINCREF(w); - if (w != NULL && PyFile_SoftSpace(w, 0)) - err = PyFile_WriteString(" ", w); - if (err == 0) - err = PyFile_WriteObject(v, w, Py_PRINT_RAW); - if (err == 0) { - /* XXX move into writeobject() ? */ - if (PyString_Check(v)) { - char *s = PyString_AS_STRING(v); - Py_ssize_t len = PyString_GET_SIZE(v); - if (len == 0 || - !isspace(Py_CHARMASK(s[len-1])) || - s[len-1] == ' ') - PyFile_SoftSpace(w, 1); - } -#ifdef Py_USING_UNICODE - else if (PyUnicode_Check(v)) { - Py_UNICODE *s = PyUnicode_AS_UNICODE(v); - Py_ssize_t len = PyUnicode_GET_SIZE(v); - if (len == 0 || - !Py_UNICODE_ISSPACE(s[len-1]) || - s[len-1] == ' ') - PyFile_SoftSpace(w, 1); - } -#endif - else - PyFile_SoftSpace(w, 1); - } - Py_XDECREF(w); - Py_DECREF(v); - Py_XDECREF(stream); - stream = NULL; - if (err == 0) - continue; - break; - - case PRINT_NEWLINE_TO: - w = stream = POP(); - /* fall through to PRINT_NEWLINE */ - - case PRINT_NEWLINE: - if (stream == NULL || stream == Py_None) { - w = PySys_GetObject("stdout"); - if (w == NULL) - PyErr_SetString(PyExc_RuntimeError, - "lost sys.stdout"); - } - if (w != NULL) { - err = PyFile_WriteString("\n", w); - if (err == 0) - PyFile_SoftSpace(w, 0); - } - Py_XDECREF(stream); - stream = NULL; - break; - - -#ifdef CASE_TOO_BIG - default: switch (opcode) { -#endif - case RAISE_VARARGS: - u = v = w = NULL; - switch (oparg) { - case 3: - u = POP(); /* traceback */ - /* Fallthrough */ - case 2: - v = POP(); /* value */ - /* Fallthrough */ - case 1: - w = POP(); /* exc */ - case 0: /* Fallthrough */ - why = do_raise(w, v, u); - break; - default: - PyErr_SetString(PyExc_SystemError, - "bad RAISE_VARARGS oparg"); - why = WHY_EXCEPTION; - break; - } - break; - - case LOAD_LOCALS: - if ((x = f->f_locals) != NULL) { - Py_INCREF(x); - PUSH(x); - continue; - } - PyErr_SetString(PyExc_SystemError, "no locals"); - break; - - case RETURN_VALUE: - retval = POP(); - why = WHY_RETURN; - goto fast_block_end; - - case YIELD_VALUE: - retval = POP(); - f->f_stacktop = stack_pointer; - why = WHY_YIELD; - goto fast_yield; - - case EXEC_STMT: - w = TOP(); - v = SECOND(); - u = THIRD(); - STACKADJ(-3); - READ_TIMESTAMP(intr0); - err = exec_statement(f, u, v, w); - READ_TIMESTAMP(intr1); - Py_DECREF(u); - Py_DECREF(v); - Py_DECREF(w); - break; - - case POP_BLOCK: - { - PyTryBlock *b = PyFrame_BlockPop(f); - while (STACK_LEVEL() > b->b_level) { - v = POP(); - Py_DECREF(v); - } - } - continue; - - case END_FINALLY: - v = POP(); - if (PyInt_Check(v)) { - why = (enum why_code) PyInt_AS_LONG(v); - assert(why != WHY_YIELD); - if (why == WHY_RETURN || - why == WHY_CONTINUE) - retval = POP(); - } - else if (PyExceptionClass_Check(v) || PyString_Check(v)) { - w = POP(); - u = POP(); - PyErr_Restore(v, w, u); - why = WHY_RERAISE; - break; - } - else if (v != Py_None) { - PyErr_SetString(PyExc_SystemError, - "'finally' pops bad exception"); - why = WHY_EXCEPTION; - } - Py_DECREF(v); - break; - - case BUILD_CLASS: - u = TOP(); - v = SECOND(); - w = THIRD(); - STACKADJ(-2); - x = build_class(u, v, w); - SET_TOP(x); - Py_DECREF(u); - Py_DECREF(v); - Py_DECREF(w); - break; - - case STORE_NAME: - w = GETITEM(names, oparg); - v = POP(); - if ((x = f->f_locals) != NULL) { - if (PyDict_CheckExact(x)) - err = PyDict_SetItem(x, w, v); - else - err = PyObject_SetItem(x, w, v); - Py_DECREF(v); - if (err == 0) continue; - break; - } - PyErr_Format(PyExc_SystemError, - "no locals found when storing %s", - PyObject_REPR(w)); - break; - - case DELETE_NAME: - w = GETITEM(names, oparg); - if ((x = f->f_locals) != NULL) { - if ((err = PyObject_DelItem(x, w)) != 0) - format_exc_check_arg(PyExc_NameError, - NAME_ERROR_MSG ,w); - break; - } - PyErr_Format(PyExc_SystemError, - "no locals when deleting %s", - PyObject_REPR(w)); - break; - - PREDICTED_WITH_ARG(UNPACK_SEQUENCE); - case UNPACK_SEQUENCE: - v = POP(); - if (PyTuple_CheckExact(v) && PyTuple_GET_SIZE(v) == oparg) { - PyObject **items = ((PyTupleObject *)v)->ob_item; - while (oparg--) { - w = items[oparg]; - Py_INCREF(w); - PUSH(w); - } - Py_DECREF(v); - continue; - } else if (PyList_CheckExact(v) && PyList_GET_SIZE(v) == oparg) { - PyObject **items = ((PyListObject *)v)->ob_item; - while (oparg--) { - w = items[oparg]; - Py_INCREF(w); - PUSH(w); - } - } else if (unpack_iterable(v, oparg, - stack_pointer + oparg)) { - stack_pointer += oparg; - } else { - /* unpack_iterable() raised an exception */ - why = WHY_EXCEPTION; - } - Py_DECREF(v); - break; - - case STORE_ATTR: - w = GETITEM(names, oparg); - v = TOP(); - u = SECOND(); - STACKADJ(-2); - err = PyObject_SetAttr(v, w, u); /* v.w = u */ - Py_DECREF(v); - Py_DECREF(u); - if (err == 0) continue; - break; - - case DELETE_ATTR: - w = GETITEM(names, oparg); - v = POP(); - err = PyObject_SetAttr(v, w, (PyObject *)NULL); - /* del v.w */ - Py_DECREF(v); - break; - - case STORE_GLOBAL: - w = GETITEM(names, oparg); - v = POP(); - err = PyDict_SetItem(f->f_globals, w, v); - Py_DECREF(v); - if (err == 0) continue; - break; - - case DELETE_GLOBAL: - w = GETITEM(names, oparg); - if ((err = PyDict_DelItem(f->f_globals, w)) != 0) - format_exc_check_arg( - PyExc_NameError, GLOBAL_NAME_ERROR_MSG, w); - break; - - case LOAD_NAME: - w = GETITEM(names, oparg); - if ((v = f->f_locals) == NULL) { - PyErr_Format(PyExc_SystemError, - "no locals when loading %s", - PyObject_REPR(w)); - break; - } - if (PyDict_CheckExact(v)) { - x = PyDict_GetItem(v, w); - Py_XINCREF(x); - } - else { - x = PyObject_GetItem(v, w); - if (x == NULL && PyErr_Occurred()) { - if (!PyErr_ExceptionMatches(PyExc_KeyError)) - break; - PyErr_Clear(); - } - } - if (x == NULL) { - x = PyDict_GetItem(f->f_globals, w); - if (x == NULL) { - x = PyDict_GetItem(f->f_builtins, w); - if (x == NULL) { - format_exc_check_arg( - PyExc_NameError, - NAME_ERROR_MSG ,w); - break; - } - } - Py_INCREF(x); - } - PUSH(x); - continue; - - case LOAD_GLOBAL: - w = GETITEM(names, oparg); - if (PyString_CheckExact(w)) { - /* Inline the PyDict_GetItem() calls. - WARNING: this is an extreme speed hack. - Do not try this at home. */ - long hash = ((PyStringObject *)w)->ob_shash; - if (hash != -1) { - PyDictObject *d; - PyDictEntry *e; - d = (PyDictObject *)(f->f_globals); - e = d->ma_lookup(d, w, hash); - if (e == NULL) { - x = NULL; - break; - } - x = e->me_value; - if (x != NULL) { - Py_INCREF(x); - PUSH(x); - continue; - } - d = (PyDictObject *)(f->f_builtins); - e = d->ma_lookup(d, w, hash); - if (e == NULL) { - x = NULL; - break; - } - x = e->me_value; - if (x != NULL) { - Py_INCREF(x); - PUSH(x); - continue; - } - goto load_global_error; - } - } - /* This is the un-inlined version of the code above */ - x = PyDict_GetItem(f->f_globals, w); - if (x == NULL) { - x = PyDict_GetItem(f->f_builtins, w); - if (x == NULL) { - load_global_error: - format_exc_check_arg( - PyExc_NameError, - GLOBAL_NAME_ERROR_MSG, w); - break; - } - } - Py_INCREF(x); - PUSH(x); - continue; - - case DELETE_FAST: - x = GETLOCAL(oparg); - if (x != NULL) { - SETLOCAL(oparg, NULL); - continue; - } - format_exc_check_arg( - PyExc_UnboundLocalError, - UNBOUNDLOCAL_ERROR_MSG, - PyTuple_GetItem(co->co_varnames, oparg) - ); - break; - - case LOAD_CLOSURE: - x = freevars[oparg]; - Py_INCREF(x); - PUSH(x); - if (x != NULL) continue; - break; - - case LOAD_DEREF: - x = freevars[oparg]; - w = PyCell_Get(x); - if (w != NULL) { - PUSH(w); - continue; - } - err = -1; - /* Don't stomp existing exception */ - if (PyErr_Occurred()) - break; - if (oparg < PyTuple_GET_SIZE(co->co_cellvars)) { - v = PyTuple_GET_ITEM(co->co_cellvars, - oparg); - format_exc_check_arg( - PyExc_UnboundLocalError, - UNBOUNDLOCAL_ERROR_MSG, - v); - } else { - v = PyTuple_GET_ITEM( - co->co_freevars, - oparg - PyTuple_GET_SIZE(co->co_cellvars)); - format_exc_check_arg( - PyExc_NameError, - UNBOUNDFREE_ERROR_MSG, - v); - } - break; - - case STORE_DEREF: - w = POP(); - x = freevars[oparg]; - PyCell_Set(x, w); - Py_DECREF(w); - continue; - - case BUILD_TUPLE: - x = PyTuple_New(oparg); - if (x != NULL) { - for (; --oparg >= 0;) { - w = POP(); - PyTuple_SET_ITEM(x, oparg, w); - } - PUSH(x); - continue; - } - break; - - case BUILD_LIST: - x = PyList_New(oparg); - if (x != NULL) { - for (; --oparg >= 0;) { - w = POP(); - PyList_SET_ITEM(x, oparg, w); - } - PUSH(x); - continue; - } - break; - - case BUILD_MAP: - x = PyDict_New(); - PUSH(x); - if (x != NULL) continue; - break; - - case LOAD_ATTR: - w = GETITEM(names, oparg); - v = TOP(); - x = PyObject_GetAttr(v, w); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) continue; - break; - - case COMPARE_OP: - w = POP(); - v = TOP(); - if (PyInt_CheckExact(w) && PyInt_CheckExact(v)) { - /* INLINE: cmp(int, int) */ - register long a, b; - register int res; - a = PyInt_AS_LONG(v); - b = PyInt_AS_LONG(w); - switch (oparg) { - case PyCmp_LT: res = a < b; break; - case PyCmp_LE: res = a <= b; break; - case PyCmp_EQ: res = a == b; break; - case PyCmp_NE: res = a != b; break; - case PyCmp_GT: res = a > b; break; - case PyCmp_GE: res = a >= b; break; - case PyCmp_IS: res = v == w; break; - case PyCmp_IS_NOT: res = v != w; break; - default: goto slow_compare; - } - x = res ? Py_True : Py_False; - Py_INCREF(x); - } - else { - slow_compare: - x = cmp_outcome(oparg, v, w); - } - Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x == NULL) break; - PREDICT(JUMP_IF_FALSE); - PREDICT(JUMP_IF_TRUE); - continue; - - case IMPORT_NAME: - w = GETITEM(names, oparg); - x = PyDict_GetItemString(f->f_builtins, "__import__"); - if (x == NULL) { - PyErr_SetString(PyExc_ImportError, - "__import__ not found"); - break; - } - v = POP(); - u = TOP(); - if (PyInt_AsLong(u) != -1 || PyErr_Occurred()) - w = PyTuple_Pack(5, - w, - f->f_globals, - f->f_locals == NULL ? - Py_None : f->f_locals, - v, - u); - else - w = PyTuple_Pack(4, - w, - f->f_globals, - f->f_locals == NULL ? - Py_None : f->f_locals, - v); - Py_DECREF(v); - Py_DECREF(u); - if (w == NULL) { - u = POP(); - x = NULL; - break; - } - READ_TIMESTAMP(intr0); - x = PyEval_CallObject(x, w); - READ_TIMESTAMP(intr1); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case IMPORT_STAR: - v = POP(); - PyFrame_FastToLocals(f); - if ((x = f->f_locals) == NULL) { - PyErr_SetString(PyExc_SystemError, - "no locals found during 'import *'"); - break; - } - READ_TIMESTAMP(intr0); - err = import_all_from(x, v); - READ_TIMESTAMP(intr1); - PyFrame_LocalsToFast(f, 0); - Py_DECREF(v); - if (err == 0) continue; - break; - - case IMPORT_FROM: - w = GETITEM(names, oparg); - v = TOP(); - READ_TIMESTAMP(intr0); - x = import_from(v, w); - READ_TIMESTAMP(intr1); - PUSH(x); - if (x != NULL) continue; - break; - - case JUMP_FORWARD: - JUMPBY(oparg); - goto fast_next_opcode; - - PREDICTED_WITH_ARG(JUMP_IF_FALSE); - case JUMP_IF_FALSE: - w = TOP(); - if (w == Py_True) { - PREDICT(POP_TOP); - goto fast_next_opcode; - } - if (w == Py_False) { - JUMPBY(oparg); - goto fast_next_opcode; - } - err = PyObject_IsTrue(w); - if (err > 0) - err = 0; - else if (err == 0) - JUMPBY(oparg); - else - break; - continue; - - PREDICTED_WITH_ARG(JUMP_IF_TRUE); - case JUMP_IF_TRUE: - w = TOP(); - if (w == Py_False) { - PREDICT(POP_TOP); - goto fast_next_opcode; - } - if (w == Py_True) { - JUMPBY(oparg); - goto fast_next_opcode; - } - err = PyObject_IsTrue(w); - if (err > 0) { - err = 0; - JUMPBY(oparg); - } - else if (err == 0) - ; - else - break; - continue; - - PREDICTED_WITH_ARG(JUMP_ABSOLUTE); - case JUMP_ABSOLUTE: - JUMPTO(oparg); - continue; - - case GET_ITER: - /* before: [obj]; after [getiter(obj)] */ - v = TOP(); - x = PyObject_GetIter(v); - Py_DECREF(v); - if (x != NULL) { - SET_TOP(x); - PREDICT(FOR_ITER); - continue; - } - STACKADJ(-1); - break; - - PREDICTED_WITH_ARG(FOR_ITER); - case FOR_ITER: - /* before: [iter]; after: [iter, iter()] *or* [] */ - v = TOP(); - x = (*v->ob_type->tp_iternext)(v); - if (x != NULL) { - PUSH(x); - PREDICT(STORE_FAST); - PREDICT(UNPACK_SEQUENCE); - continue; - } - if (PyErr_Occurred()) { - if (!PyErr_ExceptionMatches(PyExc_StopIteration)) - break; - PyErr_Clear(); - } - /* iterator ended normally */ - x = v = POP(); - Py_DECREF(v); - JUMPBY(oparg); - continue; - - case BREAK_LOOP: - why = WHY_BREAK; - goto fast_block_end; - - case CONTINUE_LOOP: - retval = PyInt_FromLong(oparg); - if (!retval) { - x = NULL; - break; - } - why = WHY_CONTINUE; - goto fast_block_end; - - case SETUP_LOOP: - case SETUP_EXCEPT: - case SETUP_FINALLY: - /* NOTE: If you add any new block-setup opcodes that are not try/except/finally - handlers, you may need to update the PyGen_NeedsFinalizing() function. */ - - PyFrame_BlockSetup(f, opcode, INSTR_OFFSET() + oparg, - STACK_LEVEL()); - continue; - - case WITH_CLEANUP: - { - /* TOP is the context.__exit__ bound method. - Below that are 1-3 values indicating how/why - we entered the finally clause: - - SECOND = None - - (SECOND, THIRD) = (WHY_{RETURN,CONTINUE}), retval - - SECOND = WHY_*; no retval below it - - (SECOND, THIRD, FOURTH) = exc_info() - In the last case, we must call - TOP(SECOND, THIRD, FOURTH) - otherwise we must call - TOP(None, None, None) - - In addition, if the stack represents an exception, - *and* the function call returns a 'true' value, we - "zap" this information, to prevent END_FINALLY from - re-raising the exception. (But non-local gotos - should still be resumed.) - */ - - x = TOP(); - u = SECOND(); - if (PyInt_Check(u) || u == Py_None) { - u = v = w = Py_None; - } - else { - v = THIRD(); - w = FOURTH(); - } - /* XXX Not the fastest way to call it... */ - x = PyObject_CallFunctionObjArgs(x, u, v, w, NULL); - if (x == NULL) - break; /* Go to error exit */ - if (u != Py_None && PyObject_IsTrue(x)) { - /* There was an exception and a true return */ - Py_DECREF(x); - x = TOP(); /* Again */ - STACKADJ(-3); - Py_INCREF(Py_None); - SET_TOP(Py_None); - Py_DECREF(x); - Py_DECREF(u); - Py_DECREF(v); - Py_DECREF(w); - } else { - /* Let END_FINALLY do its thing */ - Py_DECREF(x); - x = POP(); - Py_DECREF(x); - } - break; - } - - case CALL_FUNCTION: - { - PyObject **sp; - PCALL(PCALL_ALL); - sp = stack_pointer; -#ifdef WITH_TSC - x = call_function(&sp, oparg, &intr0, &intr1); -#else - x = call_function(&sp, oparg); -#endif - stack_pointer = sp; - PUSH(x); - if (x != NULL) - continue; - break; - } - - case CALL_FUNCTION_VAR: - case CALL_FUNCTION_KW: - case CALL_FUNCTION_VAR_KW: - { - int na = oparg & 0xff; - int nk = (oparg>>8) & 0xff; - int flags = (opcode - CALL_FUNCTION) & 3; - int n = na + 2 * nk; - PyObject **pfunc, *func, **sp; - PCALL(PCALL_ALL); - if (flags & CALL_FLAG_VAR) - n++; - if (flags & CALL_FLAG_KW) - n++; - pfunc = stack_pointer - n - 1; - func = *pfunc; - - if (PyMethod_Check(func) - && PyMethod_GET_SELF(func) != NULL) { - PyObject *self = PyMethod_GET_SELF(func); - Py_INCREF(self); - func = PyMethod_GET_FUNCTION(func); - Py_INCREF(func); - Py_DECREF(*pfunc); - *pfunc = self; - na++; - n++; - } else - Py_INCREF(func); - sp = stack_pointer; - READ_TIMESTAMP(intr0); - x = ext_do_call(func, &sp, flags, na, nk); - READ_TIMESTAMP(intr1); - stack_pointer = sp; - Py_DECREF(func); - - while (stack_pointer > pfunc) { - w = POP(); - Py_DECREF(w); - } - PUSH(x); - if (x != NULL) - continue; - break; - } - - case MAKE_FUNCTION: - v = POP(); /* code object */ - x = PyFunction_New(v, f->f_globals); - Py_DECREF(v); - /* XXX Maybe this should be a separate opcode? */ - if (x != NULL && oparg > 0) { - v = PyTuple_New(oparg); - if (v == NULL) { - Py_DECREF(x); - x = NULL; - break; - } - while (--oparg >= 0) { - w = POP(); - PyTuple_SET_ITEM(v, oparg, w); - } - err = PyFunction_SetDefaults(x, v); - Py_DECREF(v); - } - PUSH(x); - break; - - case MAKE_CLOSURE: - { - v = POP(); /* code object */ - x = PyFunction_New(v, f->f_globals); - Py_DECREF(v); - if (x != NULL) { - v = POP(); - err = PyFunction_SetClosure(x, v); - Py_DECREF(v); - } - if (x != NULL && oparg > 0) { - v = PyTuple_New(oparg); - if (v == NULL) { - Py_DECREF(x); - x = NULL; - break; - } - while (--oparg >= 0) { - w = POP(); - PyTuple_SET_ITEM(v, oparg, w); - } - err = PyFunction_SetDefaults(x, v); - Py_DECREF(v); - } - PUSH(x); - break; - } - - case BUILD_SLICE: - if (oparg == 3) - w = POP(); - else - w = NULL; - v = POP(); - u = TOP(); - x = PySlice_New(u, v, w); - Py_DECREF(u); - Py_DECREF(v); - Py_XDECREF(w); - SET_TOP(x); - if (x != NULL) continue; - break; - - case EXTENDED_ARG: - opcode = NEXTOP(); - oparg = oparg<<16 | NEXTARG(); - goto dispatch_opcode; - - default: - fprintf(stderr, - "XXX lineno: %d, opcode: %d\n", - PyCode_Addr2Line(f->f_code, f->f_lasti), - opcode); - PyErr_SetString(PyExc_SystemError, "unknown opcode"); - why = WHY_EXCEPTION; - break; - -#ifdef CASE_TOO_BIG - } -#endif - - } /* switch */ - - on_error: - - READ_TIMESTAMP(inst1); - - /* Quickly continue if no error occurred */ - - if (why == WHY_NOT) { - if (err == 0 && x != NULL) { -#ifdef CHECKEXC - /* This check is expensive! */ - if (PyErr_Occurred()) - fprintf(stderr, - "XXX undetected error\n"); - else { -#endif - READ_TIMESTAMP(loop1); - continue; /* Normal, fast path */ -#ifdef CHECKEXC - } -#endif - } - why = WHY_EXCEPTION; - x = Py_None; - err = 0; - } - - /* Double-check exception status */ - - if (why == WHY_EXCEPTION || why == WHY_RERAISE) { - if (!PyErr_Occurred()) { - PyErr_SetString(PyExc_SystemError, - "error return without exception set"); - why = WHY_EXCEPTION; - } - } -#ifdef CHECKEXC - else { - /* This check is expensive! */ - if (PyErr_Occurred()) { - char buf[1024]; - sprintf(buf, "Stack unwind with exception " - "set and why=%d", why); - Py_FatalError(buf); - } - } -#endif - - /* Log traceback info if this is a real exception */ - - if (why == WHY_EXCEPTION) { - PyTraceBack_Here(f); - - if (tstate->c_tracefunc != NULL) - call_exc_trace(tstate->c_tracefunc, - tstate->c_traceobj, f); - } - - /* For the rest, treat WHY_RERAISE as WHY_EXCEPTION */ - - if (why == WHY_RERAISE) - why = WHY_EXCEPTION; - - /* Unwind stacks if a (pseudo) exception occurred */ - -fast_block_end: - while (why != WHY_NOT && f->f_iblock > 0) { - PyTryBlock *b = PyFrame_BlockPop(f); - - assert(why != WHY_YIELD); - if (b->b_type == SETUP_LOOP && why == WHY_CONTINUE) { - /* For a continue inside a try block, - don't pop the block for the loop. */ - PyFrame_BlockSetup(f, b->b_type, b->b_handler, - b->b_level); - why = WHY_NOT; - JUMPTO(PyInt_AS_LONG(retval)); - Py_DECREF(retval); - break; - } - - while (STACK_LEVEL() > b->b_level) { - v = POP(); - Py_XDECREF(v); - } - if (b->b_type == SETUP_LOOP && why == WHY_BREAK) { - why = WHY_NOT; - JUMPTO(b->b_handler); - break; - } - if (b->b_type == SETUP_FINALLY || - (b->b_type == SETUP_EXCEPT && - why == WHY_EXCEPTION)) { - if (why == WHY_EXCEPTION) { - PyObject *exc, *val, *tb; - PyErr_Fetch(&exc, &val, &tb); - if (val == NULL) { - val = Py_None; - Py_INCREF(val); - } - /* Make the raw exception data - available to the handler, - so a program can emulate the - Python main loop. Don't do - this for 'finally'. */ - if (b->b_type == SETUP_EXCEPT) { - PyErr_NormalizeException( - &exc, &val, &tb); - set_exc_info(tstate, - exc, val, tb); - } - if (tb == NULL) { - Py_INCREF(Py_None); - PUSH(Py_None); - } else - PUSH(tb); - PUSH(val); - PUSH(exc); - } - else { - if (why & (WHY_RETURN | WHY_CONTINUE)) - PUSH(retval); - v = PyInt_FromLong((long)why); - PUSH(v); - } - why = WHY_NOT; - JUMPTO(b->b_handler); - break; - } - } /* unwind stack */ - - /* End the loop if we still have an error (or return) */ - - if (why != WHY_NOT) - break; - READ_TIMESTAMP(loop1); - - } /* main loop */ - - assert(why != WHY_YIELD); - /* Pop remaining stack entries. */ - while (!EMPTY()) { - v = POP(); - Py_XDECREF(v); - } - - if (why != WHY_RETURN) - retval = NULL; - -fast_yield: - if (tstate->use_tracing) { - if (tstate->c_tracefunc) { - if (why == WHY_RETURN || why == WHY_YIELD) { - if (call_trace(tstate->c_tracefunc, - tstate->c_traceobj, f, - PyTrace_RETURN, retval)) { - Py_XDECREF(retval); - retval = NULL; - why = WHY_EXCEPTION; - } - } - else if (why == WHY_EXCEPTION) { - call_trace_protected(tstate->c_tracefunc, - tstate->c_traceobj, f, - PyTrace_RETURN, NULL); - } - } - if (tstate->c_profilefunc) { - if (why == WHY_EXCEPTION) - call_trace_protected(tstate->c_profilefunc, - tstate->c_profileobj, f, - PyTrace_RETURN, NULL); - else if (call_trace(tstate->c_profilefunc, - tstate->c_profileobj, f, - PyTrace_RETURN, retval)) { - Py_XDECREF(retval); - retval = NULL; - why = WHY_EXCEPTION; - } - } - } - - if (tstate->frame->f_exc_type != NULL) - reset_exc_info(tstate); - else { - assert(tstate->frame->f_exc_value == NULL); - assert(tstate->frame->f_exc_traceback == NULL); - } - - /* pop frame */ - exit_eval_frame: - Py_LeaveRecursiveCall(); - tstate->frame = f->f_back; - - return retval; -} - -/* This is gonna seem *real weird*, but if you put some other code between - PyEval_EvalFrame() and PyEval_EvalCodeEx() you will need to adjust - the test in the if statements in Misc/gdbinit (pystack and pystackv). */ - -PyObject * -PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals, - PyObject **args, int argcount, PyObject **kws, int kwcount, - PyObject **defs, int defcount, PyObject *closure) -{ - register PyFrameObject *f; - register PyObject *retval = NULL; - register PyObject **fastlocals, **freevars; - PyThreadState *tstate = PyThreadState_GET(); - PyObject *x, *u; - - if (globals == NULL) { - PyErr_SetString(PyExc_SystemError, - "PyEval_EvalCodeEx: NULL globals"); - return NULL; - } - - assert(tstate != NULL); - assert(globals != NULL); - f = PyFrame_New(tstate, co, globals, locals); - if (f == NULL) - return NULL; - - fastlocals = f->f_localsplus; - freevars = f->f_localsplus + co->co_nlocals; - - if (co->co_argcount > 0 || - co->co_flags & (CO_VARARGS | CO_VARKEYWORDS)) { - int i; - int n = argcount; - PyObject *kwdict = NULL; - if (co->co_flags & CO_VARKEYWORDS) { - kwdict = PyDict_New(); - if (kwdict == NULL) - goto fail; - i = co->co_argcount; - if (co->co_flags & CO_VARARGS) - i++; - SETLOCAL(i, kwdict); - } - if (argcount > co->co_argcount) { - if (!(co->co_flags & CO_VARARGS)) { - PyErr_Format(PyExc_TypeError, - "%.200s() takes %s %d " - "%sargument%s (%d given)", - PyString_AsString(co->co_name), - defcount ? "at most" : "exactly", - co->co_argcount, - kwcount ? "non-keyword " : "", - co->co_argcount == 1 ? "" : "s", - argcount); - goto fail; - } - n = co->co_argcount; - } - for (i = 0; i < n; i++) { - x = args[i]; - Py_INCREF(x); - SETLOCAL(i, x); - } - if (co->co_flags & CO_VARARGS) { - u = PyTuple_New(argcount - n); - if (u == NULL) - goto fail; - SETLOCAL(co->co_argcount, u); - for (i = n; i < argcount; i++) { - x = args[i]; - Py_INCREF(x); - PyTuple_SET_ITEM(u, i-n, x); - } - } - for (i = 0; i < kwcount; i++) { - PyObject *keyword = kws[2*i]; - PyObject *value = kws[2*i + 1]; - int j; - if (keyword == NULL || !PyString_Check(keyword)) { - PyErr_Format(PyExc_TypeError, - "%.200s() keywords must be strings", - PyString_AsString(co->co_name)); - goto fail; - } - /* XXX slow -- speed up using dictionary? */ - for (j = 0; j < co->co_argcount; j++) { - PyObject *nm = PyTuple_GET_ITEM( - co->co_varnames, j); - int cmp = PyObject_RichCompareBool( - keyword, nm, Py_EQ); - if (cmp > 0) - break; - else if (cmp < 0) - goto fail; - } - /* Check errors from Compare */ - if (PyErr_Occurred()) - goto fail; - if (j >= co->co_argcount) { - if (kwdict == NULL) { - PyErr_Format(PyExc_TypeError, - "%.200s() got an unexpected " - "keyword argument '%.400s'", - PyString_AsString(co->co_name), - PyString_AsString(keyword)); - goto fail; - } - PyDict_SetItem(kwdict, keyword, value); - } - else { - if (GETLOCAL(j) != NULL) { - PyErr_Format(PyExc_TypeError, - "%.200s() got multiple " - "values for keyword " - "argument '%.400s'", - PyString_AsString(co->co_name), - PyString_AsString(keyword)); - goto fail; - } - Py_INCREF(value); - SETLOCAL(j, value); - } - } - if (argcount < co->co_argcount) { - int m = co->co_argcount - defcount; - for (i = argcount; i < m; i++) { - if (GETLOCAL(i) == NULL) { - PyErr_Format(PyExc_TypeError, - "%.200s() takes %s %d " - "%sargument%s (%d given)", - PyString_AsString(co->co_name), - ((co->co_flags & CO_VARARGS) || - defcount) ? "at least" - : "exactly", - m, kwcount ? "non-keyword " : "", - m == 1 ? "" : "s", i); - goto fail; - } - } - if (n > m) - i = n - m; - else - i = 0; - for (; i < defcount; i++) { - if (GETLOCAL(m+i) == NULL) { - PyObject *def = defs[i]; - Py_INCREF(def); - SETLOCAL(m+i, def); - } - } - } - } - else { - if (argcount > 0 || kwcount > 0) { - PyErr_Format(PyExc_TypeError, - "%.200s() takes no arguments (%d given)", - PyString_AsString(co->co_name), - argcount + kwcount); - goto fail; - } - } - /* Allocate and initialize storage for cell vars, and copy free - vars into frame. This isn't too efficient right now. */ - if (PyTuple_GET_SIZE(co->co_cellvars)) { - int i, j, nargs, found; - char *cellname, *argname; - PyObject *c; - - nargs = co->co_argcount; - if (co->co_flags & CO_VARARGS) - nargs++; - if (co->co_flags & CO_VARKEYWORDS) - nargs++; - - /* Initialize each cell var, taking into account - cell vars that are initialized from arguments. - - Should arrange for the compiler to put cellvars - that are arguments at the beginning of the cellvars - list so that we can march over it more efficiently? - */ - for (i = 0; i < PyTuple_GET_SIZE(co->co_cellvars); ++i) { - cellname = PyString_AS_STRING( - PyTuple_GET_ITEM(co->co_cellvars, i)); - found = 0; - for (j = 0; j < nargs; j++) { - argname = PyString_AS_STRING( - PyTuple_GET_ITEM(co->co_varnames, j)); - if (strcmp(cellname, argname) == 0) { - c = PyCell_New(GETLOCAL(j)); - if (c == NULL) - goto fail; - GETLOCAL(co->co_nlocals + i) = c; - found = 1; - break; - } - } - if (found == 0) { - c = PyCell_New(NULL); - if (c == NULL) - goto fail; - SETLOCAL(co->co_nlocals + i, c); - } - } - } - if (PyTuple_GET_SIZE(co->co_freevars)) { - int i; - for (i = 0; i < PyTuple_GET_SIZE(co->co_freevars); ++i) { - PyObject *o = PyTuple_GET_ITEM(closure, i); - Py_INCREF(o); - freevars[PyTuple_GET_SIZE(co->co_cellvars) + i] = o; - } - } - - if (co->co_flags & CO_GENERATOR) { - /* Don't need to keep the reference to f_back, it will be set - * when the generator is resumed. */ - Py_XDECREF(f->f_back); - f->f_back = NULL; - - PCALL(PCALL_GENERATOR); - - /* Create a new generator that owns the ready to run frame - * and return that as the value. */ - return PyGen_New(f); - } - - retval = PyEval_EvalFrameEx(f,0); - - fail: /* Jump here from prelude on failure */ - - /* decref'ing the frame can cause __del__ methods to get invoked, - which can call back into Python. While we're done with the - current Python frame (f), the associated C stack is still in use, - so recursion_depth must be boosted for the duration. - */ - assert(tstate != NULL); - ++tstate->recursion_depth; - Py_DECREF(f); - --tstate->recursion_depth; - return retval; -} - - -/* Implementation notes for set_exc_info() and reset_exc_info(): - -- Below, 'exc_ZZZ' stands for 'exc_type', 'exc_value' and - 'exc_traceback'. These always travel together. - -- tstate->curexc_ZZZ is the "hot" exception that is set by - PyErr_SetString(), cleared by PyErr_Clear(), and so on. - -- Once an exception is caught by an except clause, it is transferred - from tstate->curexc_ZZZ to tstate->exc_ZZZ, from which sys.exc_info() - can pick it up. This is the primary task of set_exc_info(). - XXX That can't be right: set_exc_info() doesn't look at tstate->curexc_ZZZ. - -- Now let me explain the complicated dance with frame->f_exc_ZZZ. - - Long ago, when none of this existed, there were just a few globals: - one set corresponding to the "hot" exception, and one set - corresponding to sys.exc_ZZZ. (Actually, the latter weren't C - globals; they were simply stored as sys.exc_ZZZ. For backwards - compatibility, they still are!) The problem was that in code like - this: - - try: - "something that may fail" - except "some exception": - "do something else first" - "print the exception from sys.exc_ZZZ." - - if "do something else first" invoked something that raised and caught - an exception, sys.exc_ZZZ were overwritten. That was a frequent - cause of subtle bugs. I fixed this by changing the semantics as - follows: - - - Within one frame, sys.exc_ZZZ will hold the last exception caught - *in that frame*. - - - But initially, and as long as no exception is caught in a given - frame, sys.exc_ZZZ will hold the last exception caught in the - previous frame (or the frame before that, etc.). - - The first bullet fixed the bug in the above example. The second - bullet was for backwards compatibility: it was (and is) common to - have a function that is called when an exception is caught, and to - have that function access the caught exception via sys.exc_ZZZ. - (Example: traceback.print_exc()). - - At the same time I fixed the problem that sys.exc_ZZZ weren't - thread-safe, by introducing sys.exc_info() which gets it from tstate; - but that's really a separate improvement. - - The reset_exc_info() function in ceval.c restores the tstate->exc_ZZZ - variables to what they were before the current frame was called. The - set_exc_info() function saves them on the frame so that - reset_exc_info() can restore them. The invariant is that - frame->f_exc_ZZZ is NULL iff the current frame never caught an - exception (where "catching" an exception applies only to successful - except clauses); and if the current frame ever caught an exception, - frame->f_exc_ZZZ is the exception that was stored in tstate->exc_ZZZ - at the start of the current frame. - -*/ - -static void -set_exc_info(PyThreadState *tstate, - PyObject *type, PyObject *value, PyObject *tb) -{ - PyFrameObject *frame = tstate->frame; - PyObject *tmp_type, *tmp_value, *tmp_tb; - - assert(type != NULL); - assert(frame != NULL); - if (frame->f_exc_type == NULL) { - assert(frame->f_exc_value == NULL); - assert(frame->f_exc_traceback == NULL); - /* This frame didn't catch an exception before. */ - /* Save previous exception of this thread in this frame. */ - if (tstate->exc_type == NULL) { - /* XXX Why is this set to Py_None? */ - Py_INCREF(Py_None); - tstate->exc_type = Py_None; - } - Py_INCREF(tstate->exc_type); - Py_XINCREF(tstate->exc_value); - Py_XINCREF(tstate->exc_traceback); - frame->f_exc_type = tstate->exc_type; - frame->f_exc_value = tstate->exc_value; - frame->f_exc_traceback = tstate->exc_traceback; - } - /* Set new exception for this thread. */ - tmp_type = tstate->exc_type; - tmp_value = tstate->exc_value; - tmp_tb = tstate->exc_traceback; - Py_INCREF(type); - Py_XINCREF(value); - Py_XINCREF(tb); - tstate->exc_type = type; - tstate->exc_value = value; - tstate->exc_traceback = tb; - Py_XDECREF(tmp_type); - Py_XDECREF(tmp_value); - Py_XDECREF(tmp_tb); - /* For b/w compatibility */ - PySys_SetObject("exc_type", type); - PySys_SetObject("exc_value", value); - PySys_SetObject("exc_traceback", tb); -} - -static void -reset_exc_info(PyThreadState *tstate) -{ - PyFrameObject *frame; - PyObject *tmp_type, *tmp_value, *tmp_tb; - - /* It's a precondition that the thread state's frame caught an - * exception -- verify in a debug build. - */ - assert(tstate != NULL); - frame = tstate->frame; - assert(frame != NULL); - assert(frame->f_exc_type != NULL); - - /* Copy the frame's exception info back to the thread state. */ - tmp_type = tstate->exc_type; - tmp_value = tstate->exc_value; - tmp_tb = tstate->exc_traceback; - Py_INCREF(frame->f_exc_type); - Py_XINCREF(frame->f_exc_value); - Py_XINCREF(frame->f_exc_traceback); - tstate->exc_type = frame->f_exc_type; - tstate->exc_value = frame->f_exc_value; - tstate->exc_traceback = frame->f_exc_traceback; - Py_XDECREF(tmp_type); - Py_XDECREF(tmp_value); - Py_XDECREF(tmp_tb); - - /* For b/w compatibility */ - PySys_SetObject("exc_type", frame->f_exc_type); - PySys_SetObject("exc_value", frame->f_exc_value); - PySys_SetObject("exc_traceback", frame->f_exc_traceback); - - /* Clear the frame's exception info. */ - tmp_type = frame->f_exc_type; - tmp_value = frame->f_exc_value; - tmp_tb = frame->f_exc_traceback; - frame->f_exc_type = NULL; - frame->f_exc_value = NULL; - frame->f_exc_traceback = NULL; - Py_DECREF(tmp_type); - Py_XDECREF(tmp_value); - Py_XDECREF(tmp_tb); -} - -/* Logic for the raise statement (too complicated for inlining). - This *consumes* a reference count to each of its arguments. */ -static enum why_code -do_raise(PyObject *type, PyObject *value, PyObject *tb) -{ - if (type == NULL) { - /* Reraise */ - PyThreadState *tstate = PyThreadState_GET(); - type = tstate->exc_type == NULL ? Py_None : tstate->exc_type; - value = tstate->exc_value; - tb = tstate->exc_traceback; - Py_XINCREF(type); - Py_XINCREF(value); - Py_XINCREF(tb); - } - - /* We support the following forms of raise: - raise , - raise , - raise , None - raise , - raise , None - raise , - raise , None - - An omitted second argument is the same as None. - - In addition, raise , is the same as - raising the tuple's first item (and it better have one!); - this rule is applied recursively. - - Finally, an optional third argument can be supplied, which - gives the traceback to be substituted (useful when - re-raising an exception after examining it). */ - - /* First, check the traceback argument, replacing None with - NULL. */ - if (tb == Py_None) { - Py_DECREF(tb); - tb = NULL; - } - else if (tb != NULL && !PyTraceBack_Check(tb)) { - PyErr_SetString(PyExc_TypeError, - "raise: arg 3 must be a traceback or None"); - goto raise_error; - } - - /* Next, replace a missing value with None */ - if (value == NULL) { - value = Py_None; - Py_INCREF(value); - } - - /* Next, repeatedly, replace a tuple exception with its first item */ - while (PyTuple_Check(type) && PyTuple_Size(type) > 0) { - PyObject *tmp = type; - type = PyTuple_GET_ITEM(type, 0); - Py_INCREF(type); - Py_DECREF(tmp); - } - - if (PyString_CheckExact(type)) { - /* Raising builtin string is deprecated but still allowed -- - * do nothing. Raising an instance of a new-style str - * subclass is right out. */ - if (PyErr_Warn(PyExc_DeprecationWarning, - "raising a string exception is deprecated")) - goto raise_error; - } - else if (PyExceptionClass_Check(type)) - PyErr_NormalizeException(&type, &value, &tb); - - else if (PyExceptionInstance_Check(type)) { - /* Raising an instance. The value should be a dummy. */ - if (value != Py_None) { - PyErr_SetString(PyExc_TypeError, - "instance exception may not have a separate value"); - goto raise_error; - } - else { - /* Normalize to raise , */ - Py_DECREF(value); - value = type; - type = PyExceptionInstance_Class(type); - Py_INCREF(type); - } - } - else { - /* Not something you can raise. You get an exception - anyway, just not what you specified :-) */ - PyErr_Format(PyExc_TypeError, - "exceptions must be classes, instances, or " - "strings (deprecated), not %s", - type->ob_type->tp_name); - goto raise_error; - } - PyErr_Restore(type, value, tb); - if (tb == NULL) - return WHY_EXCEPTION; - else - return WHY_RERAISE; - raise_error: - Py_XDECREF(value); - Py_XDECREF(type); - Py_XDECREF(tb); - return WHY_EXCEPTION; -} - -/* Iterate v argcnt times and store the results on the stack (via decreasing - sp). Return 1 for success, 0 if error. */ - -static int -unpack_iterable(PyObject *v, int argcnt, PyObject **sp) -{ - int i = 0; - PyObject *it; /* iter(v) */ - PyObject *w; - - assert(v != NULL); - - it = PyObject_GetIter(v); - if (it == NULL) - goto Error; - - for (; i < argcnt; i++) { - w = PyIter_Next(it); - if (w == NULL) { - /* Iterator done, via error or exhaustion. */ - if (!PyErr_Occurred()) { - PyErr_Format(PyExc_ValueError, - "need more than %d value%s to unpack", - i, i == 1 ? "" : "s"); - } - goto Error; - } - *--sp = w; - } - - /* We better have exhausted the iterator now. */ - w = PyIter_Next(it); - if (w == NULL) { - if (PyErr_Occurred()) - goto Error; - Py_DECREF(it); - return 1; - } - Py_DECREF(w); - PyErr_SetString(PyExc_ValueError, "too many values to unpack"); - /* fall through */ -Error: - for (; i > 0; i--, sp++) - Py_DECREF(*sp); - Py_XDECREF(it); - return 0; -} - - -#ifdef LLTRACE -static int -prtrace(PyObject *v, char *str) -{ - printf("%s ", str); - if (PyObject_Print(v, stdout, 0) != 0) - PyErr_Clear(); /* Don't know what else to do */ - printf("\n"); - return 1; -} -#endif - -static void -call_exc_trace(Py_tracefunc func, PyObject *self, PyFrameObject *f) -{ - PyObject *type, *value, *traceback, *arg; - int err; - PyErr_Fetch(&type, &value, &traceback); - if (value == NULL) { - value = Py_None; - Py_INCREF(value); - } - arg = PyTuple_Pack(3, type, value, traceback); - if (arg == NULL) { - PyErr_Restore(type, value, traceback); - return; - } - err = call_trace(func, self, f, PyTrace_EXCEPTION, arg); - Py_DECREF(arg); - if (err == 0) - PyErr_Restore(type, value, traceback); - else { - Py_XDECREF(type); - Py_XDECREF(value); - Py_XDECREF(traceback); - } -} - -static void -call_trace_protected(Py_tracefunc func, PyObject *obj, PyFrameObject *frame, - int what, PyObject *arg) -{ - PyObject *type, *value, *traceback; - int err; - PyErr_Fetch(&type, &value, &traceback); - err = call_trace(func, obj, frame, what, arg); - if (err == 0) - PyErr_Restore(type, value, traceback); - else { - Py_XDECREF(type); - Py_XDECREF(value); - Py_XDECREF(traceback); - } -} - -static int -call_trace(Py_tracefunc func, PyObject *obj, PyFrameObject *frame, - int what, PyObject *arg) -{ - register PyThreadState *tstate = frame->f_tstate; - int result; - if (tstate->tracing) - return 0; - tstate->tracing++; - tstate->use_tracing = 0; - result = func(obj, frame, what, arg); - tstate->use_tracing = ((tstate->c_tracefunc != NULL) - || (tstate->c_profilefunc != NULL)); - tstate->tracing--; - return result; -} - -PyObject * -_PyEval_CallTracing(PyObject *func, PyObject *args) -{ - PyFrameObject *frame = PyEval_GetFrame(); - PyThreadState *tstate = frame->f_tstate; - int save_tracing = tstate->tracing; - int save_use_tracing = tstate->use_tracing; - PyObject *result; - - tstate->tracing = 0; - tstate->use_tracing = ((tstate->c_tracefunc != NULL) - || (tstate->c_profilefunc != NULL)); - result = PyObject_Call(func, args, NULL); - tstate->tracing = save_tracing; - tstate->use_tracing = save_use_tracing; - return result; -} - -static int -maybe_call_line_trace(Py_tracefunc func, PyObject *obj, - PyFrameObject *frame, int *instr_lb, int *instr_ub, - int *instr_prev) -{ - int result = 0; - - /* If the last instruction executed isn't in the current - instruction window, reset the window. If the last - instruction happens to fall at the start of a line or if it - represents a jump backwards, call the trace function. - */ - if ((frame->f_lasti < *instr_lb || frame->f_lasti >= *instr_ub)) { - int line; - PyAddrPair bounds; - - line = PyCode_CheckLineNumber(frame->f_code, frame->f_lasti, - &bounds); - if (line >= 0) { - frame->f_lineno = line; - result = call_trace(func, obj, frame, - PyTrace_LINE, Py_None); - } - *instr_lb = bounds.ap_lower; - *instr_ub = bounds.ap_upper; - } - else if (frame->f_lasti <= *instr_prev) { - result = call_trace(func, obj, frame, PyTrace_LINE, Py_None); - } - *instr_prev = frame->f_lasti; - return result; -} - -void -PyEval_SetProfile(Py_tracefunc func, PyObject *arg) -{ - PyThreadState *tstate = PyThreadState_GET(); - PyObject *temp = tstate->c_profileobj; - Py_XINCREF(arg); - tstate->c_profilefunc = NULL; - tstate->c_profileobj = NULL; - /* Must make sure that tracing is not ignored if 'temp' is freed */ - tstate->use_tracing = tstate->c_tracefunc != NULL; - Py_XDECREF(temp); - tstate->c_profilefunc = func; - tstate->c_profileobj = arg; - /* Flag that tracing or profiling is turned on */ - tstate->use_tracing = (func != NULL) || (tstate->c_tracefunc != NULL); -} - -void -PyEval_SetTrace(Py_tracefunc func, PyObject *arg) -{ - PyThreadState *tstate = PyThreadState_GET(); - PyObject *temp = tstate->c_traceobj; - Py_XINCREF(arg); - tstate->c_tracefunc = NULL; - tstate->c_traceobj = NULL; - /* Must make sure that profiling is not ignored if 'temp' is freed */ - tstate->use_tracing = tstate->c_profilefunc != NULL; - Py_XDECREF(temp); - tstate->c_tracefunc = func; - tstate->c_traceobj = arg; - /* Flag that tracing or profiling is turned on */ - tstate->use_tracing = ((func != NULL) - || (tstate->c_profilefunc != NULL)); -} - -PyObject * -PyEval_GetBuiltins(void) -{ - PyFrameObject *current_frame = PyEval_GetFrame(); - if (current_frame == NULL) - return PyThreadState_GET()->interp->builtins; - else - return current_frame->f_builtins; -} - -PyObject * -PyEval_GetLocals(void) -{ - PyFrameObject *current_frame = PyEval_GetFrame(); - if (current_frame == NULL) - return NULL; - PyFrame_FastToLocals(current_frame); - return current_frame->f_locals; -} - -PyObject * -PyEval_GetGlobals(void) -{ - PyFrameObject *current_frame = PyEval_GetFrame(); - if (current_frame == NULL) - return NULL; - else - return current_frame->f_globals; -} - -PyFrameObject * -PyEval_GetFrame(void) -{ - PyThreadState *tstate = PyThreadState_GET(); - return _PyThreadState_GetFrame(tstate); -} - -int -PyEval_GetRestricted(void) -{ - PyFrameObject *current_frame = PyEval_GetFrame(); - return current_frame == NULL ? 0 : PyFrame_IsRestricted(current_frame); -} - -int -PyEval_MergeCompilerFlags(PyCompilerFlags *cf) -{ - PyFrameObject *current_frame = PyEval_GetFrame(); - int result = cf->cf_flags != 0; - - if (current_frame != NULL) { - const int codeflags = current_frame->f_code->co_flags; - const int compilerflags = codeflags & PyCF_MASK; - if (compilerflags) { - result = 1; - cf->cf_flags |= compilerflags; - } -#if 0 /* future keyword */ - if (codeflags & CO_GENERATOR_ALLOWED) { - result = 1; - cf->cf_flags |= CO_GENERATOR_ALLOWED; - } -#endif - } - return result; -} - -int -Py_FlushLine(void) -{ - PyObject *f = PySys_GetObject("stdout"); - if (f == NULL) - return 0; - if (!PyFile_SoftSpace(f, 0)) - return 0; - return PyFile_WriteString("\n", f); -} - - -/* External interface to call any callable object. - The arg must be a tuple or NULL. */ - -#undef PyEval_CallObject -/* for backward compatibility: export this interface */ - -PyObject * -PyEval_CallObject(PyObject *func, PyObject *arg) -{ - return PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL); -} -#define PyEval_CallObject(func,arg) \ - PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL) - -PyObject * -PyEval_CallObjectWithKeywords(PyObject *func, PyObject *arg, PyObject *kw) -{ - PyObject *result; - - if (arg == NULL) { - arg = PyTuple_New(0); - if (arg == NULL) - return NULL; - } - else if (!PyTuple_Check(arg)) { - PyErr_SetString(PyExc_TypeError, - "argument list must be a tuple"); - return NULL; - } - else - Py_INCREF(arg); - - if (kw != NULL && !PyDict_Check(kw)) { - PyErr_SetString(PyExc_TypeError, - "keyword list must be a dictionary"); - Py_DECREF(arg); - return NULL; - } - - result = PyObject_Call(func, arg, kw); - Py_DECREF(arg); - return result; -} - -const char * -PyEval_GetFuncName(PyObject *func) -{ - if (PyMethod_Check(func)) - return PyEval_GetFuncName(PyMethod_GET_FUNCTION(func)); - else if (PyFunction_Check(func)) - return PyString_AsString(((PyFunctionObject*)func)->func_name); - else if (PyCFunction_Check(func)) - return ((PyCFunctionObject*)func)->m_ml->ml_name; - else if (PyClass_Check(func)) - return PyString_AsString(((PyClassObject*)func)->cl_name); - else if (PyInstance_Check(func)) { - return PyString_AsString( - ((PyInstanceObject*)func)->in_class->cl_name); - } else { - return func->ob_type->tp_name; - } -} - -const char * -PyEval_GetFuncDesc(PyObject *func) -{ - if (PyMethod_Check(func)) - return "()"; - else if (PyFunction_Check(func)) - return "()"; - else if (PyCFunction_Check(func)) - return "()"; - else if (PyClass_Check(func)) - return " constructor"; - else if (PyInstance_Check(func)) { - return " instance"; - } else { - return " object"; - } -} - -static void -err_args(PyObject *func, int flags, int nargs) -{ - if (flags & METH_NOARGS) - PyErr_Format(PyExc_TypeError, - "%.200s() takes no arguments (%d given)", - ((PyCFunctionObject *)func)->m_ml->ml_name, - nargs); - else - PyErr_Format(PyExc_TypeError, - "%.200s() takes exactly one argument (%d given)", - ((PyCFunctionObject *)func)->m_ml->ml_name, - nargs); -} - -#define C_TRACE(x, call) \ -if (tstate->use_tracing && tstate->c_profilefunc) { \ - if (call_trace(tstate->c_profilefunc, \ - tstate->c_profileobj, \ - tstate->frame, PyTrace_C_CALL, \ - func)) { \ - x = NULL; \ - } \ - else { \ - x = call; \ - if (tstate->c_profilefunc != NULL) { \ - if (x == NULL) { \ - call_trace_protected(tstate->c_profilefunc, \ - tstate->c_profileobj, \ - tstate->frame, PyTrace_C_EXCEPTION, \ - func); \ - /* XXX should pass (type, value, tb) */ \ - } else { \ - if (call_trace(tstate->c_profilefunc, \ - tstate->c_profileobj, \ - tstate->frame, PyTrace_C_RETURN, \ - func)) { \ - Py_DECREF(x); \ - x = NULL; \ - } \ - } \ - } \ - } \ -} else { \ - x = call; \ - } - -static PyObject * -call_function(PyObject ***pp_stack, int oparg -#ifdef WITH_TSC - , uint64* pintr0, uint64* pintr1 -#endif - ) -{ - int na = oparg & 0xff; - int nk = (oparg>>8) & 0xff; - int n = na + 2 * nk; - PyObject **pfunc = (*pp_stack) - n - 1; - PyObject *func = *pfunc; - PyObject *x, *w; - - /* Always dispatch PyCFunction first, because these are - presumed to be the most frequent callable object. - */ - if (PyCFunction_Check(func) && nk == 0) { - int flags = PyCFunction_GET_FLAGS(func); - PyThreadState *tstate = PyThreadState_GET(); - - PCALL(PCALL_CFUNCTION); - if (flags & (METH_NOARGS | METH_O)) { - PyCFunction meth = PyCFunction_GET_FUNCTION(func); - PyObject *self = PyCFunction_GET_SELF(func); - if (flags & METH_NOARGS && na == 0) { - C_TRACE(x, (*meth)(self,NULL)); - } - else if (flags & METH_O && na == 1) { - PyObject *arg = EXT_POP(*pp_stack); - C_TRACE(x, (*meth)(self,arg)); - Py_DECREF(arg); - } - else { - err_args(func, flags, na); - x = NULL; - } - } - else { - PyObject *callargs; - callargs = load_args(pp_stack, na); - READ_TIMESTAMP(*pintr0); - C_TRACE(x, PyCFunction_Call(func,callargs,NULL)); - READ_TIMESTAMP(*pintr1); - Py_XDECREF(callargs); - } - } else { - if (PyMethod_Check(func) && PyMethod_GET_SELF(func) != NULL) { - /* optimize access to bound methods */ - PyObject *self = PyMethod_GET_SELF(func); - PCALL(PCALL_METHOD); - PCALL(PCALL_BOUND_METHOD); - Py_INCREF(self); - func = PyMethod_GET_FUNCTION(func); - Py_INCREF(func); - Py_DECREF(*pfunc); - *pfunc = self; - na++; - n++; - } else - Py_INCREF(func); - READ_TIMESTAMP(*pintr0); - if (PyFunction_Check(func)) - x = fast_function(func, pp_stack, n, na, nk); - else - x = do_call(func, pp_stack, na, nk); - READ_TIMESTAMP(*pintr1); - Py_DECREF(func); - } - - /* Clear the stack of the function object. Also removes - the arguments in case they weren't consumed already - (fast_function() and err_args() leave them on the stack). - */ - while ((*pp_stack) > pfunc) { - w = EXT_POP(*pp_stack); - Py_DECREF(w); - PCALL(PCALL_POP); - } - return x; -} - -/* The fast_function() function optimize calls for which no argument - tuple is necessary; the objects are passed directly from the stack. - For the simplest case -- a function that takes only positional - arguments and is called with only positional arguments -- it - inlines the most primitive frame setup code from - PyEval_EvalCodeEx(), which vastly reduces the checks that must be - done before evaluating the frame. -*/ - -static PyObject * -fast_function(PyObject *func, PyObject ***pp_stack, int n, int na, int nk) -{ - PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func); - PyObject *globals = PyFunction_GET_GLOBALS(func); - PyObject *argdefs = PyFunction_GET_DEFAULTS(func); - PyObject **d = NULL; - int nd = 0; - - PCALL(PCALL_FUNCTION); - PCALL(PCALL_FAST_FUNCTION); - if (argdefs == NULL && co->co_argcount == n && nk==0 && - co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) { - PyFrameObject *f; - PyObject *retval = NULL; - PyThreadState *tstate = PyThreadState_GET(); - PyObject **fastlocals, **stack; - int i; - - PCALL(PCALL_FASTER_FUNCTION); - assert(globals != NULL); - /* XXX Perhaps we should create a specialized - PyFrame_New() that doesn't take locals, but does - take builtins without sanity checking them. - */ - assert(tstate != NULL); - f = PyFrame_New(tstate, co, globals, NULL); - if (f == NULL) - return NULL; - - fastlocals = f->f_localsplus; - stack = (*pp_stack) - n; - - for (i = 0; i < n; i++) { - Py_INCREF(*stack); - fastlocals[i] = *stack++; - } - retval = PyEval_EvalFrameEx(f,0); - ++tstate->recursion_depth; - Py_DECREF(f); - --tstate->recursion_depth; - return retval; - } - if (argdefs != NULL) { - d = &PyTuple_GET_ITEM(argdefs, 0); - nd = ((PyTupleObject *)argdefs)->ob_size; - } - return PyEval_EvalCodeEx(co, globals, - (PyObject *)NULL, (*pp_stack)-n, na, - (*pp_stack)-2*nk, nk, d, nd, - PyFunction_GET_CLOSURE(func)); -} - -static PyObject * -update_keyword_args(PyObject *orig_kwdict, int nk, PyObject ***pp_stack, - PyObject *func) -{ - PyObject *kwdict = NULL; - if (orig_kwdict == NULL) - kwdict = PyDict_New(); - else { - kwdict = PyDict_Copy(orig_kwdict); - Py_DECREF(orig_kwdict); - } - if (kwdict == NULL) - return NULL; - while (--nk >= 0) { - int err; - PyObject *value = EXT_POP(*pp_stack); - PyObject *key = EXT_POP(*pp_stack); - if (PyDict_GetItem(kwdict, key) != NULL) { - PyErr_Format(PyExc_TypeError, - "%.200s%s got multiple values " - "for keyword argument '%.200s'", - PyEval_GetFuncName(func), - PyEval_GetFuncDesc(func), - PyString_AsString(key)); - Py_DECREF(key); - Py_DECREF(value); - Py_DECREF(kwdict); - return NULL; - } - err = PyDict_SetItem(kwdict, key, value); - Py_DECREF(key); - Py_DECREF(value); - if (err) { - Py_DECREF(kwdict); - return NULL; - } - } - return kwdict; -} - -static PyObject * -update_star_args(int nstack, int nstar, PyObject *stararg, - PyObject ***pp_stack) -{ - PyObject *callargs, *w; - - callargs = PyTuple_New(nstack + nstar); - if (callargs == NULL) { - return NULL; - } - if (nstar) { - int i; - for (i = 0; i < nstar; i++) { - PyObject *a = PyTuple_GET_ITEM(stararg, i); - Py_INCREF(a); - PyTuple_SET_ITEM(callargs, nstack + i, a); - } - } - while (--nstack >= 0) { - w = EXT_POP(*pp_stack); - PyTuple_SET_ITEM(callargs, nstack, w); - } - return callargs; -} - -static PyObject * -load_args(PyObject ***pp_stack, int na) -{ - PyObject *args = PyTuple_New(na); - PyObject *w; - - if (args == NULL) - return NULL; - while (--na >= 0) { - w = EXT_POP(*pp_stack); - PyTuple_SET_ITEM(args, na, w); - } - return args; -} - -static PyObject * -do_call(PyObject *func, PyObject ***pp_stack, int na, int nk) -{ - PyObject *callargs = NULL; - PyObject *kwdict = NULL; - PyObject *result = NULL; - - if (nk > 0) { - kwdict = update_keyword_args(NULL, nk, pp_stack, func); - if (kwdict == NULL) - goto call_fail; - } - callargs = load_args(pp_stack, na); - if (callargs == NULL) - goto call_fail; -#ifdef CALL_PROFILE - /* At this point, we have to look at the type of func to - update the call stats properly. Do it here so as to avoid - exposing the call stats machinery outside ceval.c - */ - if (PyFunction_Check(func)) - PCALL(PCALL_FUNCTION); - else if (PyMethod_Check(func)) - PCALL(PCALL_METHOD); - else if (PyType_Check(func)) - PCALL(PCALL_TYPE); - else - PCALL(PCALL_OTHER); -#endif - result = PyObject_Call(func, callargs, kwdict); - call_fail: - Py_XDECREF(callargs); - Py_XDECREF(kwdict); - return result; -} - -static PyObject * -ext_do_call(PyObject *func, PyObject ***pp_stack, int flags, int na, int nk) -{ - int nstar = 0; - PyObject *callargs = NULL; - PyObject *stararg = NULL; - PyObject *kwdict = NULL; - PyObject *result = NULL; - - if (flags & CALL_FLAG_KW) { - kwdict = EXT_POP(*pp_stack); - if (!(kwdict && PyDict_Check(kwdict))) { - PyErr_Format(PyExc_TypeError, - "%s%s argument after ** " - "must be a dictionary", - PyEval_GetFuncName(func), - PyEval_GetFuncDesc(func)); - goto ext_call_fail; - } - } - if (flags & CALL_FLAG_VAR) { - stararg = EXT_POP(*pp_stack); - if (!PyTuple_Check(stararg)) { - PyObject *t = NULL; - t = PySequence_Tuple(stararg); - if (t == NULL) { - if (PyErr_ExceptionMatches(PyExc_TypeError)) { - PyErr_Format(PyExc_TypeError, - "%s%s argument after * " - "must be a sequence", - PyEval_GetFuncName(func), - PyEval_GetFuncDesc(func)); - } - goto ext_call_fail; - } - Py_DECREF(stararg); - stararg = t; - } - nstar = PyTuple_GET_SIZE(stararg); - } - if (nk > 0) { - kwdict = update_keyword_args(kwdict, nk, pp_stack, func); - if (kwdict == NULL) - goto ext_call_fail; - } - callargs = update_star_args(na, nstar, stararg, pp_stack); - if (callargs == NULL) - goto ext_call_fail; -#ifdef CALL_PROFILE - /* At this point, we have to look at the type of func to - update the call stats properly. Do it here so as to avoid - exposing the call stats machinery outside ceval.c - */ - if (PyFunction_Check(func)) - PCALL(PCALL_FUNCTION); - else if (PyMethod_Check(func)) - PCALL(PCALL_METHOD); - else if (PyType_Check(func)) - PCALL(PCALL_TYPE); - else - PCALL(PCALL_OTHER); -#endif - result = PyObject_Call(func, callargs, kwdict); - ext_call_fail: - Py_XDECREF(callargs); - Py_XDECREF(kwdict); - Py_XDECREF(stararg); - return result; -} - -/* Extract a slice index from a PyInt or PyLong or an object with the - nb_index slot defined, and store in *pi. - Silently reduce values larger than PY_SSIZE_T_MAX to PY_SSIZE_T_MAX, - and silently boost values less than -PY_SSIZE_T_MAX-1 to -PY_SSIZE_T_MAX-1. - Return 0 on error, 1 on success. -*/ -/* Note: If v is NULL, return success without storing into *pi. This - is because_PyEval_SliceIndex() is called by apply_slice(), which can be - called by the SLICE opcode with v and/or w equal to NULL. -*/ -int -_PyEval_SliceIndex(PyObject *v, Py_ssize_t *pi) -{ - if (v != NULL) { - Py_ssize_t x; - if (PyInt_Check(v)) { - /* XXX(nnorwitz): I think PyInt_AS_LONG is correct, - however, it looks like it should be AsSsize_t. - There should be a comment here explaining why. - */ - x = PyInt_AS_LONG(v); - } - else if (PyIndex_Check(v)) { - x = PyNumber_AsSsize_t(v, NULL); - if (x == -1 && PyErr_Occurred()) - return 0; - } - else { - PyErr_SetString(PyExc_TypeError, - "slice indices must be integers or " - "None or have an __index__ method"); - return 0; - } - *pi = x; - } - return 1; -} - -#undef ISINDEX -#define ISINDEX(x) ((x) == NULL || \ - PyInt_Check(x) || PyLong_Check(x) || PyIndex_Check(x)) - -static PyObject * -apply_slice(PyObject *u, PyObject *v, PyObject *w) /* return u[v:w] */ -{ - PyTypeObject *tp = u->ob_type; - PySequenceMethods *sq = tp->tp_as_sequence; - - if (sq && sq->sq_slice && ISINDEX(v) && ISINDEX(w)) { - Py_ssize_t ilow = 0, ihigh = PY_SSIZE_T_MAX; - if (!_PyEval_SliceIndex(v, &ilow)) - return NULL; - if (!_PyEval_SliceIndex(w, &ihigh)) - return NULL; - return PySequence_GetSlice(u, ilow, ihigh); - } - else { - PyObject *slice = PySlice_New(v, w, NULL); - if (slice != NULL) { - PyObject *res = PyObject_GetItem(u, slice); - Py_DECREF(slice); - return res; - } - else - return NULL; - } -} - -static int -assign_slice(PyObject *u, PyObject *v, PyObject *w, PyObject *x) - /* u[v:w] = x */ -{ - PyTypeObject *tp = u->ob_type; - PySequenceMethods *sq = tp->tp_as_sequence; - - if (sq && sq->sq_ass_slice && ISINDEX(v) && ISINDEX(w)) { - Py_ssize_t ilow = 0, ihigh = PY_SSIZE_T_MAX; - if (!_PyEval_SliceIndex(v, &ilow)) - return -1; - if (!_PyEval_SliceIndex(w, &ihigh)) - return -1; - if (x == NULL) - return PySequence_DelSlice(u, ilow, ihigh); - else - return PySequence_SetSlice(u, ilow, ihigh, x); - } - else { - PyObject *slice = PySlice_New(v, w, NULL); - if (slice != NULL) { - int res; - if (x != NULL) - res = PyObject_SetItem(u, slice, x); - else - res = PyObject_DelItem(u, slice); - Py_DECREF(slice); - return res; - } - else - return -1; - } -} - -static PyObject * -cmp_outcome(int op, register PyObject *v, register PyObject *w) -{ - int res = 0; - switch (op) { - case PyCmp_IS: - res = (v == w); - break; - case PyCmp_IS_NOT: - res = (v != w); - break; - case PyCmp_IN: - res = PySequence_Contains(w, v); - if (res < 0) - return NULL; - break; - case PyCmp_NOT_IN: - res = PySequence_Contains(w, v); - if (res < 0) - return NULL; - res = !res; - break; - case PyCmp_EXC_MATCH: - res = PyErr_GivenExceptionMatches(v, w); - break; - default: - return PyObject_RichCompare(v, w, op); - } - v = res ? Py_True : Py_False; - Py_INCREF(v); - return v; -} - -static PyObject * -import_from(PyObject *v, PyObject *name) -{ - PyObject *x; - - x = PyObject_GetAttr(v, name); - if (x == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) { - PyErr_Format(PyExc_ImportError, - "cannot import name %.230s", - PyString_AsString(name)); - } - return x; -} - -static int -import_all_from(PyObject *locals, PyObject *v) -{ - PyObject *all = PyObject_GetAttrString(v, "__all__"); - PyObject *dict, *name, *value; - int skip_leading_underscores = 0; - int pos, err; - - if (all == NULL) { - if (!PyErr_ExceptionMatches(PyExc_AttributeError)) - return -1; /* Unexpected error */ - PyErr_Clear(); - dict = PyObject_GetAttrString(v, "__dict__"); - if (dict == NULL) { - if (!PyErr_ExceptionMatches(PyExc_AttributeError)) - return -1; - PyErr_SetString(PyExc_ImportError, - "from-import-* object has no __dict__ and no __all__"); - return -1; - } - all = PyMapping_Keys(dict); - Py_DECREF(dict); - if (all == NULL) - return -1; - skip_leading_underscores = 1; - } - - for (pos = 0, err = 0; ; pos++) { - name = PySequence_GetItem(all, pos); - if (name == NULL) { - if (!PyErr_ExceptionMatches(PyExc_IndexError)) - err = -1; - else - PyErr_Clear(); - break; - } - if (skip_leading_underscores && - PyString_Check(name) && - PyString_AS_STRING(name)[0] == '_') - { - Py_DECREF(name); - continue; - } - value = PyObject_GetAttr(v, name); - if (value == NULL) - err = -1; - else if (PyDict_CheckExact(locals)) - err = PyDict_SetItem(locals, name, value); - else - err = PyObject_SetItem(locals, name, value); - Py_DECREF(name); - Py_XDECREF(value); - if (err != 0) - break; - } - Py_DECREF(all); - return err; -} - -static PyObject * -build_class(PyObject *methods, PyObject *bases, PyObject *name) -{ - PyObject *metaclass = NULL, *result, *base; - - if (PyDict_Check(methods)) - metaclass = PyDict_GetItemString(methods, "__metaclass__"); - if (metaclass != NULL) - Py_INCREF(metaclass); - else if (PyTuple_Check(bases) && PyTuple_GET_SIZE(bases) > 0) { - base = PyTuple_GET_ITEM(bases, 0); - metaclass = PyObject_GetAttrString(base, "__class__"); - if (metaclass == NULL) { - PyErr_Clear(); - metaclass = (PyObject *)base->ob_type; - Py_INCREF(metaclass); - } - } - else { - PyObject *g = PyEval_GetGlobals(); - if (g != NULL && PyDict_Check(g)) - metaclass = PyDict_GetItemString(g, "__metaclass__"); - if (metaclass == NULL) - metaclass = (PyObject *) &PyClass_Type; - Py_INCREF(metaclass); - } - result = PyObject_CallFunctionObjArgs(metaclass, name, bases, methods, NULL); - Py_DECREF(metaclass); - if (result == NULL && PyErr_ExceptionMatches(PyExc_TypeError)) { - /* A type error here likely means that the user passed - in a base that was not a class (such the random module - instead of the random.random type). Help them out with - by augmenting the error message with more information.*/ - - PyObject *ptype, *pvalue, *ptraceback; - - PyErr_Fetch(&ptype, &pvalue, &ptraceback); - if (PyString_Check(pvalue)) { - PyObject *newmsg; - newmsg = PyString_FromFormat( - "Error when calling the metaclass bases\n %s", - PyString_AS_STRING(pvalue)); - if (newmsg != NULL) { - Py_DECREF(pvalue); - pvalue = newmsg; - } - } - PyErr_Restore(ptype, pvalue, ptraceback); - } - return result; -} - -static int -exec_statement(PyFrameObject *f, PyObject *prog, PyObject *globals, - PyObject *locals) -{ - int n; - PyObject *v; - int plain = 0; - - if (PyTuple_Check(prog) && globals == Py_None && locals == Py_None && - ((n = PyTuple_Size(prog)) == 2 || n == 3)) { - /* Backward compatibility hack */ - globals = PyTuple_GetItem(prog, 1); - if (n == 3) - locals = PyTuple_GetItem(prog, 2); - prog = PyTuple_GetItem(prog, 0); - } - if (globals == Py_None) { - globals = PyEval_GetGlobals(); - if (locals == Py_None) { - locals = PyEval_GetLocals(); - plain = 1; - } - if (!globals || !locals) { - PyErr_SetString(PyExc_SystemError, - "globals and locals cannot be NULL"); - return -1; - } - } - else if (locals == Py_None) - locals = globals; - if (!PyString_Check(prog) && - !PyUnicode_Check(prog) && - !PyCode_Check(prog) && - !PyFile_Check(prog)) { - PyErr_SetString(PyExc_TypeError, - "exec: arg 1 must be a string, file, or code object"); - return -1; - } - if (!PyDict_Check(globals)) { - PyErr_SetString(PyExc_TypeError, - "exec: arg 2 must be a dictionary or None"); - return -1; - } - if (!PyMapping_Check(locals)) { - PyErr_SetString(PyExc_TypeError, - "exec: arg 3 must be a mapping or None"); - return -1; - } - if (PyDict_GetItemString(globals, "__builtins__") == NULL) - PyDict_SetItemString(globals, "__builtins__", f->f_builtins); - if (PyCode_Check(prog)) { - if (PyCode_GetNumFree((PyCodeObject *)prog) > 0) { - PyErr_SetString(PyExc_TypeError, - "code object passed to exec may not contain free variables"); - return -1; - } - v = PyEval_EvalCode((PyCodeObject *) prog, globals, locals); - } - else if (PyFile_Check(prog)) { - FILE *fp = PyFile_AsFile(prog); - char *name = PyString_AsString(PyFile_Name(prog)); - PyCompilerFlags cf; - if (name == NULL) - return -1; - cf.cf_flags = 0; - if (PyEval_MergeCompilerFlags(&cf)) - v = PyRun_FileFlags(fp, name, Py_file_input, globals, - locals, &cf); - else - v = PyRun_File(fp, name, Py_file_input, globals, - locals); - } - else { - PyObject *tmp = NULL; - char *str; - PyCompilerFlags cf; - cf.cf_flags = 0; -#ifdef Py_USING_UNICODE - if (PyUnicode_Check(prog)) { - tmp = PyUnicode_AsUTF8String(prog); - if (tmp == NULL) - return -1; - prog = tmp; - cf.cf_flags |= PyCF_SOURCE_IS_UTF8; - } -#endif - if (PyString_AsStringAndSize(prog, &str, NULL)) - return -1; - if (PyEval_MergeCompilerFlags(&cf)) - v = PyRun_StringFlags(str, Py_file_input, globals, - locals, &cf); - else - v = PyRun_String(str, Py_file_input, globals, locals); - Py_XDECREF(tmp); - } - if (plain) - PyFrame_LocalsToFast(f, 0); - if (v == NULL) - return -1; - Py_DECREF(v); - return 0; -} - -static void -format_exc_check_arg(PyObject *exc, char *format_str, PyObject *obj) -{ - char *obj_str; - - if (!obj) - return; - - obj_str = PyString_AsString(obj); - if (!obj_str) - return; - - PyErr_Format(exc, format_str, obj_str); -} - -static PyObject * -string_concatenate(PyObject *v, PyObject *w, - PyFrameObject *f, unsigned char *next_instr) -{ - /* This function implements 'variable += expr' when both arguments - are strings. */ - Py_ssize_t v_len = PyString_GET_SIZE(v); - Py_ssize_t w_len = PyString_GET_SIZE(w); - Py_ssize_t new_len = v_len + w_len; - if (new_len < 0) { - PyErr_SetString(PyExc_OverflowError, - "strings are too large to concat"); - return NULL; - } - - if (v->ob_refcnt == 2) { - /* In the common case, there are 2 references to the value - * stored in 'variable' when the += is performed: one on the - * value stack (in 'v') and one still stored in the 'variable'. - * We try to delete the variable now to reduce the refcnt to 1. - */ - switch (*next_instr) { - case STORE_FAST: - { - int oparg = PEEKARG(); - PyObject **fastlocals = f->f_localsplus; - if (GETLOCAL(oparg) == v) - SETLOCAL(oparg, NULL); - break; - } - case STORE_DEREF: - { - PyObject **freevars = f->f_localsplus + f->f_code->co_nlocals; - PyObject *c = freevars[PEEKARG()]; - if (PyCell_GET(c) == v) - PyCell_Set(c, NULL); - break; - } - case STORE_NAME: - { - PyObject *names = f->f_code->co_names; - PyObject *name = GETITEM(names, PEEKARG()); - PyObject *locals = f->f_locals; - if (PyDict_CheckExact(locals) && - PyDict_GetItem(locals, name) == v) { - if (PyDict_DelItem(locals, name) != 0) { - PyErr_Clear(); - } - } - break; - } - } - } - - if (v->ob_refcnt == 1 && !PyString_CHECK_INTERNED(v)) { - /* Now we own the last reference to 'v', so we can resize it - * in-place. - */ - if (_PyString_Resize(&v, new_len) != 0) { - /* XXX if _PyString_Resize() fails, 'v' has been - * deallocated so it cannot be put back into 'variable'. - * The MemoryError is raised when there is no value in - * 'variable', which might (very remotely) be a cause - * of incompatibilities. - */ - return NULL; - } - /* copy 'w' into the newly allocated area of 'v' */ - memcpy(PyString_AS_STRING(v) + v_len, - PyString_AS_STRING(w), w_len); - return v; - } - else { - /* When in-place resizing is not an option. */ - PyString_Concat(&v, w); - return v; - } -} - -#ifdef DYNAMIC_EXECUTION_PROFILE - -static PyObject * -getarray(long a[256]) -{ - int i; - PyObject *l = PyList_New(256); - if (l == NULL) return NULL; - for (i = 0; i < 256; i++) { - PyObject *x = PyInt_FromLong(a[i]); - if (x == NULL) { - Py_DECREF(l); - return NULL; - } - PyList_SetItem(l, i, x); - } - for (i = 0; i < 256; i++) - a[i] = 0; - return l; -} - -PyObject * -_Py_GetDXProfile(PyObject *self, PyObject *args) -{ -#ifndef DXPAIRS - return getarray(dxp); -#else - int i; - PyObject *l = PyList_New(257); - if (l == NULL) return NULL; - for (i = 0; i < 257; i++) { - PyObject *x = getarray(dxpairs[i]); - if (x == NULL) { - Py_DECREF(l); - return NULL; - } - PyList_SetItem(l, i, x); - } - return l; -#endif -} - -#endif -- cgit v1.2.3