Fix declaration of free_sized and/or free_aligned_sized to be compatible with glibc

PiperOrigin-RevId: 770797067
Change-Id: I86bcf594fd03220c1373a42a13684519daefdfdc

Author: jcking

tcmalloc/libc_override.h

@@ -166,9 +166,9 @@ extern "C" {
 void* malloc(size_t size) TCMALLOC_NOTHROW
     TCMALLOC_ALIAS(TCMallocInternalMalloc);
 void free(void* ptr) TCMALLOC_NOTHROW TCMALLOC_ALIAS(TCMallocInternalFree);
-void free_sized(void* ptr, size_t size)
+void free_sized(void* ptr, size_t size) TCMALLOC_NOTHROW
     TCMALLOC_ALIAS(TCMallocInternalFreeSized);
-void free_aligned_sized(void* ptr, size_t align, size_t size)
+void free_aligned_sized(void* ptr, size_t align, size_t size) TCMALLOC_NOTHROW
     TCMALLOC_ALIAS(TCMallocInternalFreeAlignedSized);
 void sdallocx(void* ptr, size_t size, int flags) noexcept
     TCMALLOC_ALIAS(TCMallocInternalSdallocx);

tcmalloc/malloc_extension.cc

@@ -802,13 +802,13 @@ ABSL_ATTRIBUTE_WEAK ABSL_ATTRIBUTE_NOINLINE void sdallocx(void* ptr, size_t,
   free(ptr);
 }
 
-ABSL_ATTRIBUTE_WEAK ABSL_ATTRIBUTE_NOINLINE void free_sized(void* ptr, size_t) {
+ABSL_ATTRIBUTE_WEAK ABSL_ATTRIBUTE_NOINLINE void free_sized(void* ptr, size_t)
+    TCMALLOC_FREE_SIZED_NOEXCEPT {
   free(ptr);
 }
 
-ABSL_ATTRIBUTE_WEAK ABSL_ATTRIBUTE_NOINLINE void free_aligned_sized(void* ptr,
-                                                                    size_t,
-                                                                    size_t) {
+ABSL_ATTRIBUTE_WEAK ABSL_ATTRIBUTE_NOINLINE void free_aligned_sized(
+    void* ptr, size_t, size_t) TCMALLOC_FREE_SIZED_NOEXCEPT {
   free(ptr);
 }
 

tcmalloc/malloc_extension.h

@@ -706,13 +706,20 @@ extern "C" [[nodiscard]] size_t nallocx(size_t size, int flags) noexcept;
 // uses the size to improve deallocation performance.
 extern "C" void sdallocx(void* ptr, size_t size, int flags) noexcept;
 
+#if defined(__GLIBC__)
+#define TCMALLOC_FREE_SIZED_NOEXCEPT noexcept
+#else
+#define TCMALLOC_FREE_SIZED_NOEXCEPT
+#endif
+
 #if !defined(__STDC_VERSION_STDLIB_H__) || __STDC_VERSION_STDLIB_H__ < 202311L
 // Frees ptr allocated with malloc(size) introduced in C23.
-extern "C" void free_sized(void* ptr, size_t size);
+extern "C" void free_sized(void* ptr, size_t size) TCMALLOC_FREE_SIZED_NOEXCEPT;
 
 // Frees ptr allocated with aligned_alloc/posix_memalign with the specified size
 // and alignment introduced in C23.
-extern "C" void free_aligned_sized(void* ptr, size_t alignment, size_t size);
+extern "C" void free_aligned_sized(void* ptr, size_t alignment,
+                                   size_t size) TCMALLOC_FREE_SIZED_NOEXCEPT;
 #endif
 
 // Define __sized_ptr_t in the global namespace so that it can be named by the