152 lines
4.6 KiB
C++
152 lines
4.6 KiB
C++
//===-- memprof_malloc_linux.cpp -----------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of MemProfiler, a memory profiler.
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//
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// Linux-specific malloc interception.
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// We simply define functions like malloc, free, realloc, etc.
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// They will replace the corresponding libc functions automagically.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_common/sanitizer_platform.h"
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#if !SANITIZER_LINUX
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#error Unsupported OS
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#endif
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#include "memprof_allocator.h"
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#include "memprof_interceptors.h"
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#include "memprof_internal.h"
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#include "memprof_stack.h"
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#include "sanitizer_common/sanitizer_allocator_checks.h"
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#include "sanitizer_common/sanitizer_allocator_dlsym.h"
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#include "sanitizer_common/sanitizer_errno.h"
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#include "sanitizer_common/sanitizer_tls_get_addr.h"
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// ---------------------- Replacement functions ---------------- {{{1
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using namespace __memprof;
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struct DlsymAlloc : public DlSymAllocator<DlsymAlloc> {
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static bool UseImpl() { return memprof_init_is_running; }
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};
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INTERCEPTOR(void, free, void *ptr) {
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if (DlsymAlloc::PointerIsMine(ptr))
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return DlsymAlloc::Free(ptr);
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GET_STACK_TRACE_FREE;
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memprof_free(ptr, &stack, FROM_MALLOC);
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}
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#if SANITIZER_INTERCEPT_CFREE
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INTERCEPTOR(void, cfree, void *ptr) {
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if (DlsymAlloc::PointerIsMine(ptr))
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return DlsymAlloc::Free(ptr);
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GET_STACK_TRACE_FREE;
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memprof_free(ptr, &stack, FROM_MALLOC);
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}
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#endif // SANITIZER_INTERCEPT_CFREE
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INTERCEPTOR(void *, malloc, uptr size) {
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if (DlsymAlloc::Use())
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return DlsymAlloc::Allocate(size);
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ENSURE_MEMPROF_INITED();
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GET_STACK_TRACE_MALLOC;
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return memprof_malloc(size, &stack);
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}
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INTERCEPTOR(void *, calloc, uptr nmemb, uptr size) {
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if (DlsymAlloc::Use())
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return DlsymAlloc::Callocate(nmemb, size);
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ENSURE_MEMPROF_INITED();
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GET_STACK_TRACE_MALLOC;
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return memprof_calloc(nmemb, size, &stack);
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}
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INTERCEPTOR(void *, realloc, void *ptr, uptr size) {
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if (DlsymAlloc::Use() || DlsymAlloc::PointerIsMine(ptr))
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return DlsymAlloc::Realloc(ptr, size);
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ENSURE_MEMPROF_INITED();
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GET_STACK_TRACE_MALLOC;
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return memprof_realloc(ptr, size, &stack);
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}
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#if SANITIZER_INTERCEPT_REALLOCARRAY
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INTERCEPTOR(void *, reallocarray, void *ptr, uptr nmemb, uptr size) {
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ENSURE_MEMPROF_INITED();
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GET_STACK_TRACE_MALLOC;
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return memprof_reallocarray(ptr, nmemb, size, &stack);
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}
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#endif // SANITIZER_INTERCEPT_REALLOCARRAY
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#if SANITIZER_INTERCEPT_MEMALIGN
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INTERCEPTOR(void *, memalign, uptr boundary, uptr size) {
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GET_STACK_TRACE_MALLOC;
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return memprof_memalign(boundary, size, &stack, FROM_MALLOC);
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}
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INTERCEPTOR(void *, __libc_memalign, uptr boundary, uptr size) {
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GET_STACK_TRACE_MALLOC;
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void *res = memprof_memalign(boundary, size, &stack, FROM_MALLOC);
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DTLS_on_libc_memalign(res, size);
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return res;
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}
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#endif // SANITIZER_INTERCEPT_MEMALIGN
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#if SANITIZER_INTERCEPT_ALIGNED_ALLOC
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INTERCEPTOR(void *, aligned_alloc, uptr boundary, uptr size) {
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GET_STACK_TRACE_MALLOC;
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return memprof_aligned_alloc(boundary, size, &stack);
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}
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#endif // SANITIZER_INTERCEPT_ALIGNED_ALLOC
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INTERCEPTOR(uptr, malloc_usable_size, void *ptr) {
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GET_CURRENT_PC_BP_SP;
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(void)sp;
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return memprof_malloc_usable_size(ptr, pc, bp);
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}
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#if SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
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// We avoid including malloc.h for portability reasons.
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// man mallinfo says the fields are "long", but the implementation uses int.
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// It doesn't matter much -- we just need to make sure that the libc's mallinfo
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// is not called.
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struct fake_mallinfo {
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int x[10];
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};
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INTERCEPTOR(struct fake_mallinfo, mallinfo, void) {
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struct fake_mallinfo res;
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REAL(memset)(&res, 0, sizeof(res));
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return res;
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}
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INTERCEPTOR(int, mallopt, int cmd, int value) { return 0; }
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#endif // SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
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INTERCEPTOR(int, posix_memalign, void **memptr, uptr alignment, uptr size) {
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GET_STACK_TRACE_MALLOC;
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return memprof_posix_memalign(memptr, alignment, size, &stack);
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}
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INTERCEPTOR(void *, valloc, uptr size) {
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GET_STACK_TRACE_MALLOC;
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return memprof_valloc(size, &stack);
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}
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#if SANITIZER_INTERCEPT_PVALLOC
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INTERCEPTOR(void *, pvalloc, uptr size) {
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GET_STACK_TRACE_MALLOC;
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return memprof_pvalloc(size, &stack);
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}
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#endif // SANITIZER_INTERCEPT_PVALLOC
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INTERCEPTOR(void, malloc_stats, void) { __memprof_print_accumulated_stats(); }
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namespace __memprof {
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void ReplaceSystemMalloc() {}
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} // namespace __memprof
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