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Fix more memory allocation issues found with failmalloc.

This commit is contained in:
Neal Norwitz 2006-07-22 16:20:49 +00:00
parent 468e45edc1
commit b59d08c2fb
6 changed files with 74 additions and 36 deletions
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28
Modules/bz2module.c
View File

@ -1348,8 +1348,10 @@ BZ2File_init(BZ2FileObject *self, PyObject *args, PyObject *kwargs)
#ifdef WITH_THREAD
self->lock = PyThread_allocate_lock();
if (!self->lock)
if (!self->lock) {
PyErr_SetString(PyExc_MemoryError, "unable to allocate lock");
goto error;
}
#endif
if (mode_char == 'r')
@ -1371,10 +1373,12 @@ BZ2File_init(BZ2FileObject *self, PyObject *args, PyObject *kwargs)
return 0;
error:
Py_DECREF(self->file);
Py_CLEAR(self->file);
#ifdef WITH_THREAD
if (self->lock)
if (self->lock) {
PyThread_free_lock(self->lock);
self->lock = NULL;
}
#endif
return -1;
}
@ -1682,8 +1686,10 @@ BZ2Comp_init(BZ2CompObject *self, PyObject *args, PyObject *kwargs)
#ifdef WITH_THREAD
self->lock = PyThread_allocate_lock();
if (!self->lock)
if (!self->lock) {
PyErr_SetString(PyExc_MemoryError, "unable to allocate lock");
goto error;
}
#endif
memset(&self->bzs, 0, sizeof(bz_stream));
@ -1698,8 +1704,10 @@ BZ2Comp_init(BZ2CompObject *self, PyObject *args, PyObject *kwargs)
return 0;
error:
#ifdef WITH_THREAD
if (self->lock)
if (self->lock) {
PyThread_free_lock(self->lock);
self->lock = NULL;
}
#endif
return -1;
}
@ -1894,8 +1902,10 @@ BZ2Decomp_init(BZ2DecompObject *self, PyObject *args, PyObject *kwargs)
#ifdef WITH_THREAD
self->lock = PyThread_allocate_lock();
if (!self->lock)
if (!self->lock) {
PyErr_SetString(PyExc_MemoryError, "unable to allocate lock");
goto error;
}
#endif
self->unused_data = PyString_FromString("");
@ -1915,10 +1925,12 @@ BZ2Decomp_init(BZ2DecompObject *self, PyObject *args, PyObject *kwargs)
error:
#ifdef WITH_THREAD
if (self->lock)
if (self->lock) {
PyThread_free_lock(self->lock);
self->lock = NULL;
}
#endif
Py_XDECREF(self->unused_data);
Py_CLEAR(self->unused_data);
return -1;
}

13
Modules/cPickle.c
View File

@ -196,7 +196,7 @@ Pdata_clear(Pdata *self, int clearto)
for (i = self->length, p = self->data + clearto;
--i >= clearto;
p++) {
Py_DECREF(*p);
Py_CLEAR(*p);
}
self->length = clearto;
@ -208,6 +208,7 @@ Pdata_grow(Pdata *self)
{
int bigger;
size_t nbytes;
PyObject **tmp;
bigger = self->size << 1;
if (bigger <= 0) /* was 0, or new value overflows */
@ -217,14 +218,14 @@ Pdata_grow(Pdata *self)
nbytes = (size_t)bigger * sizeof(PyObject *);
if (nbytes / sizeof(PyObject *) != (size_t)bigger)
goto nomemory;
self->data = realloc(self->data, nbytes);
if (self->data == NULL)
tmp = realloc(self->data, nbytes);
if (tmp == NULL)
goto nomemory;
self->data = tmp;
self->size = bigger;
return 0;
nomemory:
self->size = 0;
PyErr_NoMemory();
return -1;
}
@ -4163,6 +4164,7 @@ do_append(Unpicklerobject *self, int x)
int list_len;
slice=Pdata_popList(self->stack, x);
if (! slice) return -1;
list_len = PyList_GET_SIZE(list);
i=PyList_SetSlice(list, list_len, list_len, slice);
Py_DECREF(slice);
@ -5167,6 +5169,9 @@ newUnpicklerobject(PyObject *f)
if (!( self->memo = PyDict_New()))
goto err;
if (!self->stack)
goto err;
Py_INCREF(f);
self->file = f;

36
Python/compile.c
View File

@ -300,8 +300,11 @@ PyCodeObject *
PyNode_Compile(struct _node *n, const char *filename)
{
PyCodeObject *co = NULL;
mod_ty mod;
PyArena *arena = PyArena_New();
mod_ty mod = PyAST_FromNode(n, NULL, filename, arena);
if (!arena)
return NULL;
mod = PyAST_FromNode(n, NULL, filename, arena);
if (mod)
co = PyAST_Compile(mod, filename, NULL, arena);
PyArena_Free(arena);
@ -615,8 +618,10 @@ markblocks(unsigned char *code, int len)
unsigned int *blocks = (unsigned int *)PyMem_Malloc(len*sizeof(int));
int i,j, opcode, blockcnt = 0;
if (blocks == NULL)
if (blocks == NULL) {
PyErr_NoMemory();
return NULL;
}
memset(blocks, 0, len*sizeof(int));
/* Mark labels in the first pass */
@ -1071,14 +1076,14 @@ compiler_unit_free(struct compiler_unit *u)
PyObject_Free((void *)b);
b = next;
}
Py_XDECREF(u->u_ste);
Py_XDECREF(u->u_name);
Py_XDECREF(u->u_consts);
Py_XDECREF(u->u_names);
Py_XDECREF(u->u_varnames);
Py_XDECREF(u->u_freevars);
Py_XDECREF(u->u_cellvars);
Py_XDECREF(u->u_private);
Py_CLEAR(u->u_ste);
Py_CLEAR(u->u_name);
Py_CLEAR(u->u_consts);
Py_CLEAR(u->u_names);
Py_CLEAR(u->u_varnames);
Py_CLEAR(u->u_freevars);
Py_CLEAR(u->u_cellvars);
Py_CLEAR(u->u_private);
PyObject_Free(u);
}
@ -1139,7 +1144,8 @@ compiler_enter_scope(struct compiler *c, identifier name, void *key,
/* Push the old compiler_unit on the stack. */
if (c->u) {
PyObject *wrapper = PyCObject_FromVoidPtr(c->u, NULL);
if (PyList_Append(c->c_stack, wrapper) < 0) {
if (!wrapper || PyList_Append(c->c_stack, wrapper) < 0) {
Py_XDECREF(wrapper);
compiler_unit_free(u);
return 0;
}
@ -1265,6 +1271,7 @@ compiler_next_instr(struct compiler *c, basicblock *b)
sizeof(struct instr) * DEFAULT_BLOCK_SIZE);
}
else if (b->b_iused == b->b_ialloc) {
struct instr *tmp;
size_t oldsize, newsize;
oldsize = b->b_ialloc * sizeof(struct instr);
newsize = oldsize << 1;
@ -1273,10 +1280,13 @@ compiler_next_instr(struct compiler *c, basicblock *b)
return -1;
}
b->b_ialloc <<= 1;
b->b_instr = (struct instr *)PyObject_Realloc(
tmp = (struct instr *)PyObject_Realloc(
(void *)b->b_instr, newsize);
if (b->b_instr == NULL)
if (tmp == NULL) {
PyErr_NoMemory();
return -1;
}
b->b_instr = tmp;
memset((char *)b->b_instr + oldsize, 0, newsize - oldsize);
}
return b->b_iused++;

8
Python/pyarena.c
View File

@ -132,19 +132,19 @@ PyArena_New()
{
PyArena* arena = (PyArena *)malloc(sizeof(PyArena));
if (!arena)
return NULL;
return (PyArena*)PyErr_NoMemory();
arena->a_head = block_new(DEFAULT_BLOCK_SIZE);
arena->a_cur = arena->a_head;
if (!arena->a_head) {
free((void *)arena);
return NULL;
return (PyArena*)PyErr_NoMemory();
}
arena->a_objects = PyList_New(0);
if (!arena->a_objects) {
block_free(arena->a_head);
free((void *)arena);
return NULL;
return (PyArena*)PyErr_NoMemory();
}
#if defined(Py_DEBUG)
arena->total_allocs = 0;
@ -191,7 +191,7 @@ PyArena_Malloc(PyArena *arena, size_t size)
{
void *p = block_alloc(arena->a_cur, size);
if (!p)
return NULL;
return PyErr_NoMemory();
#if defined(Py_DEBUG)
arena->total_allocs++;
arena->total_size += size;

23
Python/pythonrun.c
View File

@ -746,6 +746,11 @@ PyRun_InteractiveOneFlags(FILE *fp, const char *filename, PyCompilerFlags *flags
ps2 = PyString_AsString(w);
}
arena = PyArena_New();
if (arena == NULL) {
Py_XDECREF(v);
Py_XDECREF(w);
return -1;
}
mod = PyParser_ASTFromFile(fp, filename,
Py_single_input, ps1, ps2,
flags, &errcode, arena);
@ -1203,9 +1208,8 @@ PyRun_StringFlags(const char *str, int start, PyObject *globals,
PyObject *locals, PyCompilerFlags *flags)
{
PyObject *ret = NULL;
PyArena *arena = PyArena_New();
mod_ty mod;
PyArena *arena = PyArena_New();
if (arena == NULL)
return NULL;
@ -1221,9 +1225,8 @@ PyRun_FileExFlags(FILE *fp, const char *filename, int start, PyObject *globals,
PyObject *locals, int closeit, PyCompilerFlags *flags)
{
PyObject *ret;
PyArena *arena = PyArena_New();
mod_ty mod;
PyArena *arena = PyArena_New();
if (arena == NULL)
return NULL;
@ -1291,8 +1294,12 @@ Py_CompileStringFlags(const char *str, const char *filename, int start,
PyCompilerFlags *flags)
{
PyCodeObject *co;
mod_ty mod;
PyArena *arena = PyArena_New();
mod_ty mod = PyParser_ASTFromString(str, filename, start, flags, arena);
if (arena == NULL)
return NULL;
mod = PyParser_ASTFromString(str, filename, start, flags, arena);
if (mod == NULL) {
PyArena_Free(arena);
return NULL;
@ -1311,8 +1318,12 @@ struct symtable *
Py_SymtableString(const char *str, const char *filename, int start)
{
struct symtable *st;
mod_ty mod;
PyArena *arena = PyArena_New();
mod_ty mod = PyParser_ASTFromString(str, filename, start, NULL, arena);
if (arena == NULL)
return NULL;
mod = PyParser_ASTFromString(str, filename, start, NULL, arena);
if (mod == NULL) {
PyArena_Free(arena);
return NULL;

2
Python/symtable.c
View File

@ -727,7 +727,7 @@ symtable_exit_block(struct symtable *st, void *ast)
{
Py_ssize_t end;
Py_DECREF(st->st_cur);
Py_CLEAR(st->st_cur);
end = PyList_GET_SIZE(st->st_stack) - 1;
if (end >= 0) {
st->st_cur = (PySTEntryObject *)PyList_GET_ITEM(st->st_stack,