1//===-- memprof_interceptors_memintrinsics.cpp ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===---------------------------------------------------------------------===//
8//
9// This file is a part of MemProfiler, a memory profiler.
10//
11// MemProf versions of memcpy, memmove, and memset.
12//===---------------------------------------------------------------------===//
13
14#define SANITIZER_COMMON_NO_REDEFINE_BUILTINS
15
16#include "memprof_interceptors_memintrinsics.h"
17
18#include "memprof_interceptors.h"
19#include "memprof_stack.h"
20
21using namespace __memprof;
22
23// memcpy is called during __memprof_init() from the internals of printf(...).
24// We do not treat memcpy with to==from as a bug.
25// See http://llvm.org/bugs/show_bug.cgi?id=11763.
26#define MEMPROF_MEMCPY_IMPL(to, from, size) \
27 do { \
28 if (UNLIKELY(!memprof_inited)) \
29 return internal_memcpy(to, from, size); \
30 if (memprof_init_is_running) { \
31 return REAL(memcpy)(to, from, size); \
32 } \
33 ENSURE_MEMPROF_INITED(); \
34 MEMPROF_READ_RANGE(from, size); \
35 MEMPROF_WRITE_RANGE(to, size); \
36 return REAL(memcpy)(to, from, size); \
37 } while (0)
38
39// memset is called inside Printf.
40#define MEMPROF_MEMSET_IMPL(block, c, size) \
41 do { \
42 if (UNLIKELY(!memprof_inited)) \
43 return internal_memset(block, c, size); \
44 if (memprof_init_is_running) { \
45 return REAL(memset)(block, c, size); \
46 } \
47 ENSURE_MEMPROF_INITED(); \
48 MEMPROF_WRITE_RANGE(block, size); \
49 return REAL(memset)(block, c, size); \
50 } while (0)
51
52#define MEMPROF_MEMMOVE_IMPL(to, from, size) \
53 do { \
54 if (UNLIKELY(!memprof_inited)) \
55 return internal_memmove(to, from, size); \
56 ENSURE_MEMPROF_INITED(); \
57 MEMPROF_READ_RANGE(from, size); \
58 MEMPROF_WRITE_RANGE(to, size); \
59 return internal_memmove(to, from, size); \
60 } while (0)
61
62#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) \
63 do { \
64 MEMPROF_INTERCEPTOR_ENTER(ctx, memmove); \
65 MEMPROF_MEMMOVE_IMPL(to, from, size); \
66 } while (false)
67
68#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) \
69 do { \
70 MEMPROF_INTERCEPTOR_ENTER(ctx, memcpy); \
71 MEMPROF_MEMCPY_IMPL(to, from, size); \
72 } while (false)
73
74#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) \
75 do { \
76 MEMPROF_INTERCEPTOR_ENTER(ctx, memset); \
77 MEMPROF_MEMSET_IMPL(block, c, size); \
78 } while (false)
79
80#include "sanitizer_common/sanitizer_common_interceptors_memintrinsics.inc"
81
82void *__memprof_memcpy(void *to, const void *from, uptr size) {
83 MEMPROF_MEMCPY_IMPL(to, from, size);
84}
85
86void *__memprof_memset(void *block, int c, uptr size) {
87 MEMPROF_MEMSET_IMPL(block, c, size);
88}
89
90void *__memprof_memmove(void *to, const void *from, uptr size) {
91 MEMPROF_MEMMOVE_IMPL(to, from, size);
92}
93

source code of compiler-rt/lib/memprof/memprof_interceptors_memintrinsics.cpp