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[ASan][Windows] Add __cdecl to public sanitizer functions (#69625)
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This is necessary for many projects which pass `/Gz` to their compiles,
which makes their default calling convention `__stdcall`.

(personal note, I _really_ wish there was a pragma for this)
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strega-nil committed Oct 31, 2023
1 parent b1b4bf0 commit b799080
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Showing 13 changed files with 736 additions and 657 deletions.
129 changes: 66 additions & 63 deletions compiler-rt/include/sanitizer/allocator_interface.h
Original file line number Diff line number Diff line change
Expand Up @@ -11,86 +11,89 @@
#ifndef SANITIZER_ALLOCATOR_INTERFACE_H
#define SANITIZER_ALLOCATOR_INTERFACE_H

#include <sanitizer/common_interface_defs.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif
/* Returns the estimated number of bytes that will be reserved by allocator
for request of "size" bytes. If allocator can't allocate that much
memory, returns the maximal possible allocation size, otherwise returns
"size". */
size_t __sanitizer_get_estimated_allocated_size(size_t size);
/* Returns the estimated number of bytes that will be reserved by allocator
for request of "size" bytes. If allocator can't allocate that much
memory, returns the maximal possible allocation size, otherwise returns
"size". */
size_t SANITIZER_CDECL __sanitizer_get_estimated_allocated_size(size_t size);

/* Returns true if p was returned by the allocator and
is not yet freed. */
int __sanitizer_get_ownership(const volatile void *p);
/* Returns true if p was returned by the allocator and
is not yet freed. */
int SANITIZER_CDECL __sanitizer_get_ownership(const volatile void *p);

/* If a pointer lies within an allocation, it will return the start address
of the allocation. Otherwise, it returns nullptr. */
const void *__sanitizer_get_allocated_begin(const void *p);
/* If a pointer lies within an allocation, it will return the start address
of the allocation. Otherwise, it returns nullptr. */
const void *SANITIZER_CDECL __sanitizer_get_allocated_begin(const void *p);

/* Returns the number of bytes reserved for the pointer p.
Requires (get_ownership(p) == true) or (p == 0). */
size_t __sanitizer_get_allocated_size(const volatile void *p);
/* Returns the number of bytes reserved for the pointer p.
Requires (get_ownership(p) == true) or (p == 0). */
size_t SANITIZER_CDECL __sanitizer_get_allocated_size(const volatile void *p);

/* Returns the number of bytes reserved for the pointer p.
Requires __sanitizer_get_allocated_begin(p) == p. */
size_t __sanitizer_get_allocated_size_fast(const volatile void *p);
/* Returns the number of bytes reserved for the pointer p.
Requires __sanitizer_get_allocated_begin(p) == p. */
size_t SANITIZER_CDECL
__sanitizer_get_allocated_size_fast(const volatile void *p);

/* Number of bytes, allocated and not yet freed by the application. */
size_t __sanitizer_get_current_allocated_bytes(void);
/* Number of bytes, allocated and not yet freed by the application. */
size_t SANITIZER_CDECL __sanitizer_get_current_allocated_bytes(void);

/* Number of bytes, mmaped by the allocator to fulfill allocation requests.
Generally, for request of X bytes, allocator can reserve and add to free
lists a large number of chunks of size X to use them for future requests.
All these chunks count toward the heap size. Currently, allocator never
releases memory to OS (instead, it just puts freed chunks to free
lists). */
size_t __sanitizer_get_heap_size(void);
/* Number of bytes, mmaped by the allocator to fulfill allocation requests.
Generally, for request of X bytes, allocator can reserve and add to free
lists a large number of chunks of size X to use them for future requests.
All these chunks count toward the heap size. Currently, allocator never
releases memory to OS (instead, it just puts freed chunks to free
lists). */
size_t SANITIZER_CDECL __sanitizer_get_heap_size(void);

/* Number of bytes, mmaped by the allocator, which can be used to fulfill
allocation requests. When a user program frees memory chunk, it can first
fall into quarantine and will count toward __sanitizer_get_free_bytes()
later. */
size_t __sanitizer_get_free_bytes(void);
/* Number of bytes, mmaped by the allocator, which can be used to fulfill
allocation requests. When a user program frees memory chunk, it can first
fall into quarantine and will count toward __sanitizer_get_free_bytes()
later. */
size_t SANITIZER_CDECL __sanitizer_get_free_bytes(void);

/* Number of bytes in unmapped pages, that are released to OS. Currently,
always returns 0. */
size_t __sanitizer_get_unmapped_bytes(void);
/* Number of bytes in unmapped pages, that are released to OS. Currently,
always returns 0. */
size_t SANITIZER_CDECL __sanitizer_get_unmapped_bytes(void);

/* Malloc hooks that may be optionally provided by user.
__sanitizer_malloc_hook(ptr, size) is called immediately after
allocation of "size" bytes, which returned "ptr".
__sanitizer_free_hook(ptr) is called immediately before
deallocation of "ptr". */
void __sanitizer_malloc_hook(const volatile void *ptr, size_t size);
void __sanitizer_free_hook(const volatile void *ptr);
/* Malloc hooks that may be optionally provided by user.
__sanitizer_malloc_hook(ptr, size) is called immediately after
allocation of "size" bytes, which returned "ptr".
__sanitizer_free_hook(ptr) is called immediately before
deallocation of "ptr". */
void SANITIZER_CDECL __sanitizer_malloc_hook(const volatile void *ptr,
size_t size);
void SANITIZER_CDECL __sanitizer_free_hook(const volatile void *ptr);

/* Installs a pair of hooks for malloc/free.
Several (currently, 5) hook pairs may be installed, they are executed
in the order they were installed and after calling
__sanitizer_malloc_hook/__sanitizer_free_hook.
Unlike __sanitizer_malloc_hook/__sanitizer_free_hook these hooks can be
chained and do not rely on weak symbols working on the platform, but
require __sanitizer_install_malloc_and_free_hooks to be called at startup
and thus will not be called on malloc/free very early in the process.
Returns the number of hooks currently installed or 0 on failure.
Not thread-safe, should be called in the main thread before starting
other threads.
*/
int __sanitizer_install_malloc_and_free_hooks(
void (*malloc_hook)(const volatile void *, size_t),
void (*free_hook)(const volatile void *));
/* Installs a pair of hooks for malloc/free.
Several (currently, 5) hook pairs may be installed, they are executed
in the order they were installed and after calling
__sanitizer_malloc_hook/__sanitizer_free_hook.
Unlike __sanitizer_malloc_hook/__sanitizer_free_hook these hooks can be
chained and do not rely on weak symbols working on the platform, but
require __sanitizer_install_malloc_and_free_hooks to be called at startup
and thus will not be called on malloc/free very early in the process.
Returns the number of hooks currently installed or 0 on failure.
Not thread-safe, should be called in the main thread before starting
other threads.
*/
int SANITIZER_CDECL __sanitizer_install_malloc_and_free_hooks(
void (*SANITIZER_CDECL malloc_hook)(const volatile void *, size_t),
void (*SANITIZER_CDECL free_hook)(const volatile void *));

/* Drains allocator quarantines (calling thread's and global ones), returns
freed memory back to OS and releases other non-essential internal allocator
resources in attempt to reduce process RSS.
Currently available with ASan only.
*/
void __sanitizer_purge_allocator(void);
/* Drains allocator quarantines (calling thread's and global ones), returns
freed memory back to OS and releases other non-essential internal allocator
resources in attempt to reduce process RSS.
Currently available with ASan only.
*/
void SANITIZER_CDECL __sanitizer_purge_allocator(void);
#ifdef __cplusplus
} // extern "C"
} // extern "C"
#endif

#endif

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