termux-packages/packages/kphp/runtime-allocator.cpp.patch

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2022-01-13 13:07:28 +01:00
--- a/runtime/allocator.cpp
+++ b/runtime/allocator.cpp
@@ -9,6 +9,36 @@
#include <dlfcn.h>
#include <unistd.h>
+static void *(* volatile malloc_hook_dummy)(size_t, const void *);
+static decltype(malloc_hook_dummy) *malloc_hook_ptr;
+static void *(* volatile realloc_hook_dummy)(void *, size_t, const void *);
+static decltype(realloc_hook_dummy) *realloc_hook_ptr;
+static void (* volatile free_hook_dummy)(void *, const void *);
+static decltype(free_hook_dummy) *free_hook_ptr;
+static void *(* volatile memalign_hook_dummy)(size_t, size_t, const void *);
+static decltype(memalign_hook_dummy) *memalign_hook_ptr;
+
+static void malloc_hook_init(void) {
+ static bool initialized = false;
+ if (initialized) return;
+ void *libc_handle = dlopen("libc.so", RTLD_NOW);
+ if (libc_handle != NULL) {
+ malloc_hook_ptr = (decltype(malloc_hook_ptr))dlsym(libc_handle, "__malloc_hook");
+ realloc_hook_ptr = (decltype(realloc_hook_ptr))dlsym(libc_handle, "__realloc_hook");
+ free_hook_ptr = (decltype(free_hook_ptr))dlsym(libc_handle, "__free_hook");
+ memalign_hook_ptr = (decltype(memalign_hook_ptr))dlsym(libc_handle, "__memalign_hook");
+ }
+ if (malloc_hook_ptr == NULL)
+ malloc_hook_ptr = &malloc_hook_dummy;
+ if (realloc_hook_ptr == NULL)
+ realloc_hook_ptr = &realloc_hook_dummy;
+ if (free_hook_ptr == NULL)
+ free_hook_ptr = &free_hook_dummy;
+ if (memalign_hook_ptr == NULL)
+ memalign_hook_ptr = &memalign_hook_dummy;
+ initialized = true;
+}
+
#include "common/algorithms/find.h"
#include "common/containers/final_action.h"
#include "common/macos-ports.h"
@@ -246,10 +276,11 @@
void switch_hooks(bool malloc_hooks_are_replaced_before) noexcept {
php_assert(malloc_hooks_are_replaced_before == malloc_hooks_are_replaced_);
CriticalSectionGuard critical_section;
- std::swap(malloc_hook_, __malloc_hook);
- std::swap(realloc_hook_, __realloc_hook);
- std::swap(memalign_hook_, __memalign_hook);
- std::swap(free_hook_, __free_hook);
+ malloc_hook_init();
+ std::swap(malloc_hook_, *malloc_hook_ptr);
+ std::swap(realloc_hook_, *realloc_hook_ptr);
+ std::swap(memalign_hook_, *memalign_hook_ptr);
+ std::swap(free_hook_, *free_hook_ptr);
malloc_hooks_are_replaced_ = !malloc_hooks_are_replaced_;
}
@@ -274,10 +305,10 @@
return script_allocator_free(ptr);
}} {}
- decltype(__malloc_hook) malloc_hook_{nullptr};
- decltype(__realloc_hook) realloc_hook_{nullptr};
- decltype(__memalign_hook) memalign_hook_{nullptr};
- decltype(__free_hook) free_hook_{nullptr};
+ decltype(malloc_hook_dummy) malloc_hook_{nullptr};
+ decltype(realloc_hook_dummy) realloc_hook_{nullptr};
+ decltype(memalign_hook_dummy) memalign_hook_{nullptr};
+ decltype(free_hook_dummy) free_hook_{nullptr};
bool malloc_hooks_are_replaced_{false};
};