mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-21 22:22:48 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-36142: Add _PyPreConfig_SetAllocator() (GH-12187)

Browse source 
* _PyPreConfig_Write() now reallocates the pre-configuration with the
  new memory allocator.
* It is no longer needed to force the "default raw memory allocator"
  to clear pre-configuration and core configuration. Simplify the
  code.
* _PyPreConfig_Write() now does nothing if called after
  Py_Initialize(): no longer check if the allocator is the same.
* Remove _PyMem_GetDebugAllocatorsName(): dev mode sets again
  allocator to "debug".
This commit is contained in:
Victor Stinner 2019-03-06 01:13:43 +01:00 • committed by GitHub
parent 7d2ef3ef50
commit c656e25667
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
7 changed files with 50 additions and 88 deletions
Download patch file Download diff file Expand all files Collapse all files

61
Python/preconfig.c
View file

@ -125,15 +125,8 @@ precmdline_clear(_PyPreCmdline *cmdline)
void
_PyPreConfig_Clear(_PyPreConfig *config)
{
#define CLEAR(ATTR) \
do { \
PyMem_RawFree(ATTR); \
ATTR = NULL; \
} while (0)
CLEAR(config->allocator);
#undef CLEAR
PyMem_RawFree(config->allocator);
config->allocator = NULL;
}
@ -453,8 +446,7 @@ preconfig_read(_PyPreConfig *config, const _PyPreCmdline *cmdline)
/* allocator */
if (config->dev_mode && config->allocator == NULL) {
const char *allocator = _PyMem_GetDebugAllocatorsName();
config->allocator = _PyMem_RawStrdup(allocator);
config->allocator = _PyMem_RawStrdup("debug");
if (config->allocator == NULL) {
return _Py_INIT_NO_MEMORY();
}
@ -742,31 +734,56 @@ done:
static _PyInitError
_PyPreConfig_Reconfigure(const _PyPreConfig *config)
_PyPreConfig_SetAllocator(_PyPreConfig *config)
{
if (config->allocator != NULL) {
const char *allocator = _PyMem_GetAllocatorsName();
if (allocator == NULL || strcmp(config->allocator, allocator) != 0) {
return _Py_INIT_USER_ERR("cannot modify memory allocator "
"after first Py_Initialize()");
}
assert(!_PyRuntime.core_initialized);
PyMemAllocatorEx old_alloc;
PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (_PyMem_SetupAllocators(config->allocator) < 0) {
return _Py_INIT_USER_ERR("Unknown PYTHONMALLOC allocator");
}
/* Copy the pre-configuration with the new allocator */
_PyPreConfig config2 = _PyPreConfig_INIT;
if (_PyPreConfig_Copy(&config2, config) < 0) {
_PyPreConfig_Clear(&config2);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return _Py_INIT_NO_MEMORY();
}
/* Free the old config and replace config with config2. Since config now
owns the data, don't free config2. */
PyMemAllocatorEx new_alloc;
PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &new_alloc);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
_PyPreConfig_Clear(config);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &new_alloc);
*config = config2;
return _Py_INIT_OK();
}
/* Write the pre-configuration.
If the memory allocator is changed, config is re-allocated with new
allocator. So calling _PyPreConfig_Clear(config) is safe after this call. */
_PyInitError
_PyPreConfig_Write(const _PyPreConfig *config)
_PyPreConfig_Write(_PyPreConfig *config)
{
if (_PyRuntime.core_initialized) {
/* bpo-34008: Calling Py_Main() after Py_Initialize() ignores
the new configuration. */
return _PyPreConfig_Reconfigure(config);
return _Py_INIT_OK();
}
if (config->allocator != NULL) {
if (_PyMem_SetupAllocators(config->allocator) < 0) {
return _Py_INIT_USER_ERR("Unknown PYTHONMALLOC allocator");
_PyInitError err = _PyPreConfig_SetAllocator(config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}