[ASan][Windows] Add __cdecl to public sanitizer functions (llvm#69625)

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)

(cherry picked from commit b799080)

Author: strega-nil

compiler-rt/include/sanitizer/allocator_interface.h

@@ -11,78 +11,80 @@
 #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);
 
-  /* 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);
 
-  /* 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