Function detectNestedMalloc

src/mallocTracer.cpp:121–132

In some implementations, specifically on musl, calloc() calls malloc() internally, and posix_memalign() calls aligned_alloc(). Detect such cases to prevent double-accounting.

// In some implementations, specifically on musl, calloc() calls malloc() internally,
// and posix_memalign() calls aligned_alloc(). Detect such cases to prevent double-accounting.
static void detectNestedMalloc() {
    CodeCache* libc = Profiler::instance()->findLibraryByAddress((void*)_orig_calloc);
    if (libc == NULL) {
        return;
    }

    libc->patchImport(im_malloc, (void*)nested_malloc_hook);

    _current_thread = pthread_self();
    free(_orig_calloc(1, 1));
    _current_thread = pthread_t(0);
}

// Call each intercepted function at least once to ensure
// its GOT entry is updated with a correct target address