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1810 lines (1606 loc) · 47.3 KB
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/* Top level execution of Python code (including in __main__) */
/* To help control the interfaces between the startup, execution and
* shutdown code, the phases are split across separate modules (bootstrap,
* pythonrun, shutdown)
*/
/* TODO: Cull includes following phase split */
#include "Python.h"
#include "pycore_ast.h" // PyAST_mod2obj()
#include "pycore_audit.h" // _PySys_Audit()
#include "pycore_ceval.h" // _Py_EnterRecursiveCall()
#include "pycore_compile.h" // _PyAST_Compile()
#include "pycore_fileutils.h" // _PyFile_Flush
#include "pycore_import.h" // _PyImport_GetImportlibExternalLoader()
#include "pycore_interp.h" // PyInterpreterState.importlib
#include "pycore_object.h" // _PyDebug_PrintTotalRefs()
#include "pycore_parser.h" // _PyParser_ASTFromString()
#include "pycore_pyerrors.h" // _PyErr_GetRaisedException()
#include "pycore_pylifecycle.h" // _Py_FdIsInteractive()
#include "pycore_pystate.h" // _PyInterpreterState_GET()
#include "pycore_pythonrun.h" // export _PyRun_AnyFile()
#include "pycore_sysmodule.h" // _PySys_SetAttr()
#include "pycore_traceback.h" // _PyTraceBack_Print()
#include "pycore_unicodeobject.h" // _PyUnicode_Equal()
#include "errcode.h" // E_EOF
#include "marshal.h" // PyMarshal_ReadLongFromFile()
#include <stdbool.h>
#ifdef MS_WINDOWS
# include "malloc.h" // alloca()
#endif
#ifdef MS_WINDOWS
# undef BYTE
# include "windows.h"
#endif
/* Forward declarations */
static void flush_io(void);
static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *,
PyCompilerFlags *, PyArena *, PyObject*, int);
static PyObject *run_pyc_file(FILE *, PyObject *, PyObject *,
PyCompilerFlags *);
static PyObject *
_PyRun_String(const char *str, PyObject* name, int start,
PyObject *globals, PyObject *locals, PyCompilerFlags *flags,
int generate_new_source);
static PyObject*
_PyRun_InteractiveLoop(FILE *fp, PyObject *filename, PyCompilerFlags *flags);
static int
_PyRun_InteractiveOne(FILE *fp, PyObject *filename, PyCompilerFlags *flags);
static PyObject *
_PyRun_File(FILE *fp, PyObject *filename, int start, PyObject *globals,
PyObject *locals, int closeit, PyCompilerFlags *flags);
// See also pymain_error()
static void
pyrun_error(const char *msg)
{
PySys_FormatStderr("python: %s\n", msg);
}
PyObject*
_PyRun_AnyFile(FILE *fp, PyObject *filename, int closeit,
PyCompilerFlags *flags)
{
int decref_filename = 0;
if (filename == NULL) {
filename = PyUnicode_FromString("???");
if (filename == NULL) {
return NULL;
}
decref_filename = 1;
}
PyObject *result;
if (_Py_FdIsInteractive(fp, filename)) {
result = _PyRun_InteractiveLoop(fp, filename, flags);
if (closeit) {
fclose(fp);
}
}
else {
result = _PyRun_SimpleFile(fp, filename, closeit, flags);
}
if (decref_filename) {
Py_DECREF(filename);
}
return result;
}
int
PyRun_AnyFileExFlags(FILE *fp, const char *filename, int closeit,
PyCompilerFlags *flags)
{
PyObject *filename_obj = NULL;
if (filename != NULL) {
filename_obj = PyUnicode_DecodeFSDefault(filename);
if (filename_obj == NULL) {
PyErr_Print();
return -1;
}
}
PyObject *result = _PyRun_AnyFile(fp, filename_obj, closeit, flags);
Py_XDECREF(filename_obj);
if (result == NULL) {
PyErr_Print();
return -1;
}
Py_DECREF(result);
return 0;
}
static PyObject*
_PyRun_InteractiveLoop(FILE *fp, PyObject *filename, PyCompilerFlags *flags)
{
PyCompilerFlags local_flags = _PyCompilerFlags_INIT;
if (flags == NULL) {
flags = &local_flags;
}
PyObject *v;
if (PySys_GetOptionalAttr(&_Py_ID(ps1), &v) < 0) {
return NULL;
}
if (v == NULL) {
v = PyUnicode_FromString(">>> ");
if (v == NULL) {
PyErr_Clear();
}
if (_PySys_SetAttr(&_Py_ID(ps1), v) < 0) {
PyErr_Clear();
}
}
Py_XDECREF(v);
if (PySys_GetOptionalAttr(&_Py_ID(ps2), &v) < 0) {
return NULL;
}
if (v == NULL) {
v = PyUnicode_FromString("... ");
if (v == NULL) {
PyErr_Clear();
}
if (_PySys_SetAttr(&_Py_ID(ps2), v) < 0) {
PyErr_Clear();
}
}
Py_XDECREF(v);
#ifdef Py_REF_DEBUG
int show_ref_count = _Py_GetConfig()->show_ref_count;
#endif
int nomem_count = 0;
int ret;
do {
ret = _PyRun_InteractiveOne(fp, filename, flags);
if (ret == -1 && PyErr_Occurred()) {
/* Prevent an endless loop after multiple consecutive MemoryErrors
* while still allowing an interactive command to fail with a
* MemoryError. */
if (PyErr_ExceptionMatches(PyExc_MemoryError)) {
if (++nomem_count > 16) {
return NULL;
}
} else {
nomem_count = 0;
}
int inspect = _Py_GetConfig()->inspect;
if (!inspect && PyErr_ExceptionMatches(PyExc_SystemExit)) {
return NULL;
}
PyErr_Print();
}
else {
nomem_count = 0;
}
#ifdef Py_REF_DEBUG
if (show_ref_count) {
_PyDebug_PrintTotalRefs();
}
#endif
} while (ret != E_EOF);
Py_RETURN_NONE;
}
int
PyRun_InteractiveLoopFlags(FILE *fp, const char *filename, PyCompilerFlags *flags)
{
PyObject *filename_obj = PyUnicode_DecodeFSDefault(filename);
if (filename_obj == NULL) {
PyErr_Print();
return -1;
}
PyObject *result = _PyRun_InteractiveLoop(fp, filename_obj, flags);
Py_DECREF(filename_obj);
if (result == NULL) {
PyErr_Print();
return -1;
}
Py_DECREF(result);
return 0;
}
// Call _PyParser_ASTFromFile() with sys.stdin.encoding, sys.ps1 and sys.ps2
static int
pyrun_one_parse_ast(FILE *fp, PyObject *filename,
PyCompilerFlags *flags, PyArena *arena,
mod_ty *pmod, PyObject** interactive_src)
{
// Get sys.stdin.encoding (as UTF-8)
PyObject *attr;
PyObject *encoding_obj = NULL;
const char *encoding = NULL;
if (fp == stdin) {
if (PySys_GetOptionalAttr(&_Py_ID(stdin), &attr) < 0) {
PyErr_Clear();
}
else if (attr != NULL && attr != Py_None) {
if (PyObject_GetOptionalAttr(attr, &_Py_ID(encoding), &encoding_obj) < 0) {
PyErr_Clear();
}
else if (encoding_obj && PyUnicode_Check(encoding_obj)) {
encoding = PyUnicode_AsUTF8(encoding_obj);
if (!encoding) {
PyErr_Clear();
}
}
}
Py_XDECREF(attr);
}
// Get sys.ps1 (as UTF-8)
PyObject *ps1_obj = NULL;
const char *ps1 = "";
if (PySys_GetOptionalAttr(&_Py_ID(ps1), &attr) < 0) {
PyErr_Clear();
}
else if (attr != NULL) {
ps1_obj = PyObject_Str(attr);
Py_DECREF(attr);
if (ps1_obj == NULL) {
PyErr_Clear();
}
else if (PyUnicode_Check(ps1_obj)) {
ps1 = PyUnicode_AsUTF8(ps1_obj);
if (ps1 == NULL) {
PyErr_Clear();
ps1 = "";
}
}
}
// Get sys.ps2 (as UTF-8)
PyObject *ps2_obj = NULL;
const char *ps2 = "";
if (PySys_GetOptionalAttr(&_Py_ID(ps2), &attr) < 0) {
PyErr_Clear();
}
else if (attr != NULL) {
ps2_obj = PyObject_Str(attr);
Py_DECREF(attr);
if (ps2_obj == NULL) {
PyErr_Clear();
}
else if (PyUnicode_Check(ps2_obj)) {
ps2 = PyUnicode_AsUTF8(ps2_obj);
if (ps2 == NULL) {
PyErr_Clear();
ps2 = "";
}
}
}
int errcode = 0;
*pmod = _PyParser_InteractiveASTFromFile(fp, filename, encoding,
Py_single_input, ps1, ps2,
flags, &errcode, interactive_src, arena);
Py_XDECREF(ps1_obj);
Py_XDECREF(ps2_obj);
Py_XDECREF(encoding_obj);
if (*pmod == NULL) {
if (errcode == E_EOF) {
PyErr_Clear();
return E_EOF;
}
return -1;
}
return 0;
}
/* A PyRun_InteractiveOneObject() auxiliary function that does not print the
* error on failure. */
static int
_PyRun_InteractiveOne(FILE *fp, PyObject *filename, PyCompilerFlags *flags)
{
if (!PyUnicode_Check(filename)) {
PyErr_Format(PyExc_TypeError, "expect str for filename, got %T",
filename);
return -1;
}
PyArena *arena = _PyArena_New();
if (arena == NULL) {
return -1;
}
mod_ty mod;
PyObject *interactive_src;
int parse_res = pyrun_one_parse_ast(fp, filename, flags, arena, &mod, &interactive_src);
if (parse_res != 0) {
_PyArena_Free(arena);
return parse_res;
}
PyObject *main_module = PyImport_AddModuleRef("__main__");
if (main_module == NULL) {
_PyArena_Free(arena);
return -1;
}
PyObject *main_dict = PyModule_GetDict(main_module); // borrowed ref
PyObject *res = run_mod(mod, filename, main_dict, main_dict, flags, arena, interactive_src, 1);
Py_INCREF(interactive_src);
_PyArena_Free(arena);
Py_DECREF(main_module);
if (res == NULL) {
PyThreadState *tstate = _PyThreadState_GET();
PyObject *exc = _PyErr_GetRaisedException(tstate);
if (PyType_IsSubtype(Py_TYPE(exc),
(PyTypeObject *) PyExc_SyntaxError))
{
/* fix "text" attribute */
assert(interactive_src != NULL);
PyObject *xs = PyUnicode_Splitlines(interactive_src, 1);
if (xs == NULL) {
goto error;
}
PyObject *exc_lineno = PyObject_GetAttr(exc, &_Py_ID(lineno));
if (exc_lineno == NULL) {
Py_DECREF(xs);
goto error;
}
int n = PyLong_AsInt(exc_lineno);
Py_DECREF(exc_lineno);
if (n <= 0 || n > PyList_GET_SIZE(xs)) {
Py_DECREF(xs);
goto error;
}
PyObject *line = PyList_GET_ITEM(xs, n - 1);
PyObject_SetAttr(exc, &_Py_ID(text), line);
Py_DECREF(xs);
}
error:
Py_DECREF(interactive_src);
_PyErr_SetRaisedException(tstate, exc);
return -1;
}
Py_DECREF(interactive_src);
Py_DECREF(res);
flush_io();
return 0;
}
int
PyRun_InteractiveOneObject(FILE *fp, PyObject *filename, PyCompilerFlags *flags)
{
int res = _PyRun_InteractiveOne(fp, filename, flags);
if (res == -1) {
PyErr_Print();
flush_io();
}
return res;
}
int
PyRun_InteractiveOneFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)
{
PyObject *filename;
int res;
filename = PyUnicode_DecodeFSDefault(filename_str);
if (filename == NULL) {
PyErr_Print();
return -1;
}
res = PyRun_InteractiveOneObject(fp, filename, flags);
Py_DECREF(filename);
return res;
}
/* Check whether a file maybe a pyc file: Look at the extension,
the file type, and, if we may close it, at the first few bytes. */
static int
maybe_pyc_file(FILE *fp, PyObject *filename, int closeit)
{
PyObject *ext = PyUnicode_FromString(".pyc");
if (ext == NULL) {
return -1;
}
Py_ssize_t endswith = PyUnicode_Tailmatch(filename, ext, 0, PY_SSIZE_T_MAX, +1);
Py_DECREF(ext);
if (endswith) {
return 1;
}
/* Only look into the file if we are allowed to close it, since
it then should also be seekable. */
if (!closeit) {
return 0;
}
/* Read only two bytes of the magic. If the file was opened in
text mode, the bytes 3 and 4 of the magic (\r\n) might not
be read as they are on disk. */
unsigned int halfmagic = PyImport_GetMagicNumber() & 0xFFFF;
unsigned char buf[2];
/* Mess: In case of -x, the stream is NOT at its start now,
and ungetc() was used to push back the first newline,
which makes the current stream position formally undefined,
and a x-platform nightmare.
Unfortunately, we have no direct way to know whether -x
was specified. So we use a terrible hack: if the current
stream position is not 0, we assume -x was specified, and
give up. Bug 132850 on SourceForge spells out the
hopelessness of trying anything else (fseek and ftell
don't work predictably x-platform for text-mode files).
*/
int ispyc = 0;
if (ftell(fp) == 0) {
if (fread(buf, 1, 2, fp) == 2 &&
((unsigned int)buf[1]<<8 | buf[0]) == halfmagic)
ispyc = 1;
rewind(fp);
}
return ispyc;
}
static int
set_main_loader(PyObject *d, PyObject *filename, const char *loader_name)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
PyObject *loader_type = _PyImport_GetImportlibExternalLoader(interp,
loader_name);
if (loader_type == NULL) {
return -1;
}
PyObject *loader = PyObject_CallFunction(loader_type,
"sO", "__main__", filename);
Py_DECREF(loader_type);
if (loader == NULL) {
return -1;
}
if (PyDict_SetItemString(d, "__loader__", loader) < 0) {
Py_DECREF(loader);
return -1;
}
Py_DECREF(loader);
return 0;
}
PyObject*
_PyRun_SimpleFile(FILE *fp, PyObject *filename, int closeit,
PyCompilerFlags *flags)
{
PyObject *res = NULL;
int set_file_name = 0;
PyObject *main_module = PyImport_AddModuleRef("__main__");
if (main_module == NULL) {
goto done;
}
PyObject *dict = PyModule_GetDict(main_module); // borrowed ref
int has_file = PyDict_ContainsString(dict, "__file__");
if (has_file < 0) {
goto done;
}
if (!has_file) {
if (PyDict_SetItemString(dict, "__file__", filename) < 0) {
pyrun_error("failed to set __main__.__file__");
goto done;
}
set_file_name = 1;
}
int pyc = maybe_pyc_file(fp, filename, closeit);
if (pyc < 0) {
goto done;
}
if (pyc) {
FILE *pyc_fp;
/* Try to run a pyc file. First, re-open in binary */
if (closeit) {
fclose(fp);
}
pyc_fp = Py_fopen(filename, "rb");
if (pyc_fp == NULL) {
pyrun_error("Can't reopen .pyc file");
goto done;
}
if (set_main_loader(dict, filename, "SourcelessFileLoader") < 0) {
pyrun_error("failed to set __main__.__loader__");
fclose(pyc_fp);
goto done;
}
res = run_pyc_file(pyc_fp, dict, dict, flags);
} else {
/* When running from stdin, leave __main__.__loader__ alone */
if ((!PyUnicode_Check(filename) || !PyUnicode_EqualToUTF8(filename, "<stdin>")) &&
set_main_loader(dict, filename, "SourceFileLoader") < 0) {
pyrun_error("failed to set __main__.__loader__");
goto done;
}
res = _PyRun_File(fp, filename, Py_file_input, dict, dict,
closeit, flags);
}
flush_io();
done:
if (set_file_name) {
if (PyDict_PopString(dict, "__file__", NULL) < 0) {
pyrun_error("failed to delete __main__.__file__");
Py_CLEAR(res);
}
}
Py_XDECREF(main_module);
return res;
}
int
PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit,
PyCompilerFlags *flags)
{
PyObject *filename_obj = PyUnicode_DecodeFSDefault(filename);
if (filename_obj == NULL) {
PyErr_Print();
return -1;
}
PyObject *result = _PyRun_SimpleFile(fp, filename_obj, closeit, flags);
Py_DECREF(filename_obj);
if (result == NULL) {
PyErr_Print();
return -1;
}
return 0;
}
PyObject*
_PyRun_SimpleString(const char *command, PyObject* name,
PyCompilerFlags *flags)
{
PyObject *main_module = PyImport_AddModuleRef("__main__");
if (main_module == NULL) {
return NULL;
}
PyObject *dict = PyModule_GetDict(main_module); // borrowed ref
PyObject *res = _PyRun_String(command, name, Py_file_input,
dict, dict, flags, 0);
Py_DECREF(main_module);
return res;
}
int
PyRun_SimpleStringFlags(const char *command, PyCompilerFlags *flags)
{
PyObject *res = _PyRun_SimpleString(command, NULL, flags);
if (res == NULL) {
PyErr_Print();
return -1;
}
Py_DECREF(res);
return 0;
}
static int
parse_exit_code(PyObject *code, int *exitcode_p)
{
if (PyLong_Check(code)) {
// gh-125842: Use a long long to avoid an overflow error when `long`
// is 32-bit. We still truncate the result to an int.
int exitcode = (int)PyLong_AsLongLong(code);
if (exitcode == -1 && PyErr_Occurred()) {
// On overflow or other error, clear the exception and use -1
// as the exit code to match historical Python behavior.
PyErr_Clear();
*exitcode_p = -1;
return 1;
}
*exitcode_p = exitcode;
return 1;
}
else if (code == Py_None) {
*exitcode_p = 0;
return 1;
}
return 0;
}
int
_Py_HandleSystemExitAndKeyboardInterrupt(int *exitcode_p)
{
if (PyErr_ExceptionMatches(PyExc_KeyboardInterrupt)) {
_Py_atomic_store_int(&_PyRuntime.signals.unhandled_keyboard_interrupt, 1);
return 0;
}
int inspect = _Py_GetConfig()->inspect;
if (inspect) {
/* Don't exit if -i flag was given. This flag is set to 0
* when entering interactive mode for inspecting. */
return 0;
}
if (!PyErr_ExceptionMatches(PyExc_SystemExit)) {
return 0;
}
fflush(stdout);
PyObject *exc = PyErr_GetRaisedException();
assert(exc != NULL && PyExceptionInstance_Check(exc));
PyObject *code = PyObject_GetAttr(exc, &_Py_ID(code));
if (code == NULL) {
// If the exception has no 'code' attribute, print the exception below
PyErr_Clear();
}
else if (parse_exit_code(code, exitcode_p)) {
Py_DECREF(code);
Py_CLEAR(exc);
return 1;
}
else {
// If code is not an int or None, print it below
Py_SETREF(exc, code);
}
PyObject *sys_stderr;
if (PySys_GetOptionalAttr(&_Py_ID(stderr), &sys_stderr) < 0) {
PyErr_Clear();
}
else if (sys_stderr != NULL && sys_stderr != Py_None) {
if (PyFile_WriteObject(exc, sys_stderr, Py_PRINT_RAW) < 0) {
PyErr_Clear();
}
}
else {
if (PyObject_Print(exc, stderr, Py_PRINT_RAW) < 0) {
PyErr_Clear();
}
fflush(stderr);
}
PySys_WriteStderr("\n");
Py_XDECREF(sys_stderr);
Py_CLEAR(exc);
*exitcode_p = 1;
return 1;
}
static void
handle_system_exit(void)
{
int exitcode;
if (_Py_HandleSystemExitAndKeyboardInterrupt(&exitcode)) {
Py_Exit(exitcode);
}
}
static void
_PyErr_PrintEx(PyThreadState *tstate, int set_sys_last_vars)
{
PyObject *typ = NULL, *tb = NULL, *hook = NULL;
handle_system_exit();
PyObject *exc = _PyErr_GetRaisedException(tstate);
if (exc == NULL) {
goto done;
}
assert(PyExceptionInstance_Check(exc));
typ = Py_NewRef(Py_TYPE(exc));
tb = PyException_GetTraceback(exc);
if (tb == NULL) {
tb = Py_NewRef(Py_None);
}
if (set_sys_last_vars) {
if (_PySys_SetAttr(&_Py_ID(last_exc), exc) < 0) {
_PyErr_Clear(tstate);
}
/* Legacy version: */
if (_PySys_SetAttr(&_Py_ID(last_type), typ) < 0) {
_PyErr_Clear(tstate);
}
if (_PySys_SetAttr(&_Py_ID(last_value), exc) < 0) {
_PyErr_Clear(tstate);
}
if (_PySys_SetAttr(&_Py_ID(last_traceback), tb) < 0) {
_PyErr_Clear(tstate);
}
}
if (PySys_GetOptionalAttr(&_Py_ID(excepthook), &hook) < 0) {
PyErr_Clear();
}
if (_PySys_Audit(tstate, "sys.excepthook", "OOOO", hook ? hook : Py_None,
typ, exc, tb) < 0) {
if (PyErr_ExceptionMatches(PyExc_RuntimeError)) {
PyErr_Clear();
goto done;
}
PyErr_FormatUnraisable("Exception ignored in audit hook");
}
if (hook) {
PyObject* args[3] = {typ, exc, tb};
PyObject *result = PyObject_Vectorcall(hook, args, 3, NULL);
if (result == NULL) {
handle_system_exit();
PyObject *exc2 = _PyErr_GetRaisedException(tstate);
assert(exc2 && PyExceptionInstance_Check(exc2));
fflush(stdout);
PySys_WriteStderr("Error in sys.excepthook:\n");
PyErr_DisplayException(exc2);
PySys_WriteStderr("\nOriginal exception was:\n");
PyErr_DisplayException(exc);
Py_DECREF(exc2);
}
else {
Py_DECREF(result);
}
}
else {
PySys_WriteStderr("sys.excepthook is missing\n");
PyErr_DisplayException(exc);
}
done:
Py_XDECREF(hook);
Py_XDECREF(typ);
Py_XDECREF(exc);
Py_XDECREF(tb);
}
void
_PyErr_Print(PyThreadState *tstate)
{
_PyErr_PrintEx(tstate, 1);
}
void
PyErr_PrintEx(int set_sys_last_vars)
{
PyThreadState *tstate = _PyThreadState_GET();
_PyErr_PrintEx(tstate, set_sys_last_vars);
}
void
PyErr_Print(void)
{
PyErr_PrintEx(1);
}
struct exception_print_context
{
PyObject *file;
PyObject *seen; // Prevent cycles in recursion
};
static int
print_exception_invalid_type(struct exception_print_context *ctx,
PyObject *value)
{
PyObject *f = ctx->file;
const char *const msg = "TypeError: print_exception(): Exception expected "
"for value, ";
if (PyFile_WriteString(msg, f) < 0) {
return -1;
}
if (PyFile_WriteString(Py_TYPE(value)->tp_name, f) < 0) {
return -1;
}
if (PyFile_WriteString(" found\n", f) < 0) {
return -1;
}
return 0;
}
static int
print_exception_traceback(struct exception_print_context *ctx, PyObject *value)
{
PyObject *f = ctx->file;
int err = 0;
PyObject *tb = PyException_GetTraceback(value);
if (tb && tb != Py_None) {
const char *header = EXCEPTION_TB_HEADER;
err = _PyTraceBack_Print(tb, header, f);
}
Py_XDECREF(tb);
return err;
}
static int
print_exception_file_and_line(struct exception_print_context *ctx,
PyObject **value_p)
{
PyObject *f = ctx->file;
PyObject *tmp;
int res = PyObject_GetOptionalAttr(*value_p, &_Py_ID(print_file_and_line), &tmp);
if (res <= 0) {
if (res < 0) {
PyErr_Clear();
}
return 0;
}
Py_DECREF(tmp);
PyObject *filename = NULL;
Py_ssize_t lineno = 0;
PyObject* v = PyObject_GetAttr(*value_p, &_Py_ID(filename));
if (!v) {
return -1;
}
if (v == Py_None) {
Py_DECREF(v);
_Py_DECLARE_STR(anon_string, "<string>");
filename = Py_NewRef(&_Py_STR(anon_string));
}
else {
filename = v;
}
PyObject *line = PyUnicode_FromFormat(" File \"%S\", line %zd\n",
filename, lineno);
Py_DECREF(filename);
if (line == NULL) {
goto error;
}
if (PyFile_WriteObject(line, f, Py_PRINT_RAW) < 0) {
goto error;
}
Py_CLEAR(line);
assert(!PyErr_Occurred());
return 0;
error:
Py_XDECREF(line);
return -1;
}
/* Prints the message line: module.qualname[: str(exc)] */
static int
print_exception_message(struct exception_print_context *ctx, PyObject *type,
PyObject *value)
{
PyObject *f = ctx->file;
if (PyErr_GivenExceptionMatches(value, PyExc_MemoryError)) {
// The Python APIs in this function require allocating memory
// for various objects. If we're out of memory, we can't do that,
return -1;
}
assert(PyExceptionClass_Check(type));
PyObject *modulename = PyObject_GetAttr(type, &_Py_ID(__module__));
if (modulename == NULL || !PyUnicode_Check(modulename)) {
Py_XDECREF(modulename);
PyErr_Clear();
if (PyFile_WriteString("<unknown>.", f) < 0) {
return -1;
}
}
else {
if (!_PyUnicode_Equal(modulename, &_Py_ID(builtins)) &&
!_PyUnicode_Equal(modulename, &_Py_ID(__main__)))
{
int res = PyFile_WriteObject(modulename, f, Py_PRINT_RAW);
Py_DECREF(modulename);
if (res < 0) {
return -1;
}
if (PyFile_WriteString(".", f) < 0) {
return -1;
}
}
else {
Py_DECREF(modulename);
}
}
PyObject *qualname = PyType_GetQualName((PyTypeObject *)type);
if (qualname == NULL || !PyUnicode_Check(qualname)) {
Py_XDECREF(qualname);
PyErr_Clear();
if (PyFile_WriteString("<unknown>", f) < 0) {
return -1;
}
}
else {
int res = PyFile_WriteObject(qualname, f, Py_PRINT_RAW);
Py_DECREF(qualname);
if (res < 0) {
return -1;
}
}
if (Py_IsNone(value)) {
return 0;
}
PyObject *s = PyObject_Str(value);
if (s == NULL) {
PyErr_Clear();
if (PyFile_WriteString(": <exception str() failed>", f) < 0) {
return -1;
}
}
else {
/* only print colon if the str() of the
object is not the empty string
*/
if (!PyUnicode_Check(s) || PyUnicode_GetLength(s) != 0) {
if (PyFile_WriteString(": ", f) < 0) {
Py_DECREF(s);
return -1;
}
}
int res = PyFile_WriteObject(s, f, Py_PRINT_RAW);
Py_DECREF(s);
if (res < 0) {
return -1;
}
}
return 0;
}
static int
print_exception(struct exception_print_context *ctx, PyObject *value)
{
PyObject *f = ctx->file;
if (!PyExceptionInstance_Check(value)) {
return print_exception_invalid_type(ctx, value);
}
Py_INCREF(value);
fflush(stdout);
if (print_exception_traceback(ctx, value) < 0) {
goto error;
}
/* grab the type and notes now because value can change below */
PyObject *type = (PyObject *) Py_TYPE(value);
if (print_exception_file_and_line(ctx, &value) < 0) {
goto error;
}
if (print_exception_message(ctx, type, value) < 0) {
goto error;
}
if (PyFile_WriteString("\n", f) < 0) {