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Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001//===-- msan_interceptors.cc ----------------------------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of MemorySanitizer.
11//
12// Interceptors for standard library functions.
Kostya Serebryany9a58d392012-12-12 09:54:35 +000013//
14// FIXME: move as many interceptors as possible into
15// sanitizer_common/sanitizer_common_interceptors.h
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000016//===----------------------------------------------------------------------===//
17
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000018#include "msan.h"
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +000019#include "msan_thread.h"
Evgeniy Stepanovea61d082013-02-19 09:19:16 +000020#include "sanitizer_common/sanitizer_platform_limits_posix.h"
Kostya Serebryanyfa79cd62013-01-25 11:46:22 +000021#include "sanitizer_common/sanitizer_allocator.h"
Evgeniy Stepanov022235c2013-09-27 11:32:21 +000022#include "sanitizer_common/sanitizer_allocator_internal.h"
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +000023#include "sanitizer_common/sanitizer_atomic.h"
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000024#include "sanitizer_common/sanitizer_common.h"
Evgeniy Stepanov66297ca2013-12-20 12:20:15 +000025#include "sanitizer_common/sanitizer_interception.h"
Evgeniy Stepanov9f7e8c12013-01-28 13:52:49 +000026#include "sanitizer_common/sanitizer_stackdepot.h"
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000027#include "sanitizer_common/sanitizer_libc.h"
Evgeniy Stepanovb4a218d2013-03-19 09:30:52 +000028#include "sanitizer_common/sanitizer_linux.h"
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000029
30#include <stdarg.h>
31// ACHTUNG! No other system header includes in this file.
32// Ideally, we should get rid of stdarg.h as well.
33
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000034using namespace __msan;
35
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +000036using __sanitizer::memory_order;
37using __sanitizer::atomic_load;
38using __sanitizer::atomic_store;
39using __sanitizer::atomic_uintptr_t;
40
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +000041// True if this is a nested interceptor.
42static THREADLOCAL int in_interceptor_scope;
43
Evgeniy Stepanov791a7e12014-02-10 09:37:03 +000044extern "C" int *__errno_location(void);
45
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +000046struct InterceptorScope {
47 InterceptorScope() { ++in_interceptor_scope; }
48 ~InterceptorScope() { --in_interceptor_scope; }
49};
50
51bool IsInInterceptorScope() {
52 return in_interceptor_scope;
53}
54
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000055#define ENSURE_MSAN_INITED() do { \
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +000056 CHECK(!msan_init_is_running); \
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000057 if (!msan_inited) { \
58 __msan_init(); \
59 } \
60} while (0)
61
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +000062// Check that [x, x+n) range is unpoisoned.
Evgeniy Stepanovae4e1ec2013-06-21 12:37:58 +000063#define CHECK_UNPOISONED_0(x, n) \
64 do { \
65 sptr offset = __msan_test_shadow(x, n); \
66 if (__msan::IsInSymbolizer()) break; \
67 if (offset >= 0 && __msan::flags()->report_umrs) { \
68 GET_CALLER_PC_BP_SP; \
69 (void) sp; \
Evgeniy Stepanov8dd62dc2014-05-07 11:50:14 +000070 ReportUMRInsideAddressRange(__func__, x, n, offset); \
Evgeniy Stepanovae4e1ec2013-06-21 12:37:58 +000071 __msan::PrintWarningWithOrigin(pc, bp, \
72 __msan_get_origin((char *)x + offset)); \
Dmitry Vyukov97f0eae2013-08-13 15:33:00 +000073 if (__msan::flags()->halt_on_error) { \
Evgeniy Stepanovae4e1ec2013-06-21 12:37:58 +000074 Printf("Exiting\n"); \
75 Die(); \
76 } \
77 } \
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000078 } while (0)
79
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +000080// Check that [x, x+n) range is unpoisoned unless we are in a nested
81// interceptor.
Evgeniy Stepanovdec0f762013-06-28 11:02:43 +000082#define CHECK_UNPOISONED(x, n) \
83 do { \
84 if (!IsInInterceptorScope()) CHECK_UNPOISONED_0(x, n); \
85 } while (0);
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +000086
Kostya Serebryany07bb3922012-12-13 06:31:40 +000087static void *fast_memset(void *ptr, int c, SIZE_T n);
88static void *fast_memcpy(void *dst, const void *src, SIZE_T n);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000089
Kostya Serebryany07bb3922012-12-13 06:31:40 +000090INTERCEPTOR(SIZE_T, fread, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000091 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +000092 SIZE_T res = REAL(fread)(ptr, size, nmemb, file);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000093 if (res > 0)
94 __msan_unpoison(ptr, res *size);
95 return res;
96}
97
Kostya Serebryany07bb3922012-12-13 06:31:40 +000098INTERCEPTOR(SIZE_T, fread_unlocked, void *ptr, SIZE_T size, SIZE_T nmemb,
Evgeniy Stepanovc5033782012-12-11 12:27:27 +000099 void *file) {
100 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000101 SIZE_T res = REAL(fread_unlocked)(ptr, size, nmemb, file);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000102 if (res > 0)
103 __msan_unpoison(ptr, res *size);
104 return res;
105}
106
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000107INTERCEPTOR(SSIZE_T, readlink, const char *path, char *buf, SIZE_T bufsiz) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000108 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000109 SSIZE_T res = REAL(readlink)(path, buf, bufsiz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000110 if (res > 0)
111 __msan_unpoison(buf, res);
112 return res;
113}
114
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000115INTERCEPTOR(void *, memcpy, void *dest, const void *src, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000116 return __msan_memcpy(dest, src, n);
117}
118
Evgeniy Stepanovaa23bd82013-07-02 14:49:24 +0000119INTERCEPTOR(void *, mempcpy, void *dest, const void *src, SIZE_T n) {
120 return (char *)__msan_memcpy(dest, src, n) + n;
121}
122
Evgeniy Stepanov365bd0c2013-11-01 23:49:48 +0000123INTERCEPTOR(void *, memccpy, void *dest, const void *src, int c, SIZE_T n) {
124 ENSURE_MSAN_INITED();
125 void *res = REAL(memccpy)(dest, src, c, n);
126 CHECK(!res || (res >= dest && res <= (char *)dest + n));
127 SIZE_T sz = res ? (char *)res - (char *)dest : n;
128 CHECK_UNPOISONED(src, sz);
129 __msan_unpoison(dest, sz);
130 return res;
131}
132
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000133INTERCEPTOR(void *, memmove, void *dest, const void *src, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000134 return __msan_memmove(dest, src, n);
135}
136
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000137INTERCEPTOR(void *, memset, void *s, int c, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000138 return __msan_memset(s, c, n);
139}
140
Evgeniy Stepanovdb615c12013-07-04 13:19:41 +0000141INTERCEPTOR(void *, bcopy, const void *src, void *dest, SIZE_T n) {
142 return __msan_memmove(dest, src, n);
143}
144
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000145INTERCEPTOR(int, posix_memalign, void **memptr, SIZE_T alignment, SIZE_T size) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000146 GET_MALLOC_STACK_TRACE;
147 CHECK_EQ(alignment & (alignment - 1), 0);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000148 CHECK_NE(memptr, 0);
Evgeniy Stepanov455abf42013-04-23 13:27:36 +0000149 *memptr = MsanReallocate(&stack, 0, size, alignment, false);
150 CHECK_NE(*memptr, 0);
151 __msan_unpoison(memptr, sizeof(*memptr));
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000152 return 0;
153}
154
Evgeniy Stepanove3eaa7b2013-09-02 09:24:53 +0000155INTERCEPTOR(void *, memalign, SIZE_T boundary, SIZE_T size) {
156 GET_MALLOC_STACK_TRACE;
157 CHECK_EQ(boundary & (boundary - 1), 0);
158 void *ptr = MsanReallocate(&stack, 0, size, boundary, false);
159 return ptr;
160}
161
Rafael Espindola5e460702014-03-26 15:48:59 +0000162INTERCEPTOR(void *, __libc_memalign, uptr align, uptr s)
163 ALIAS(WRAPPER_NAME(memalign));
Kostya Serebryanye402b432014-01-24 09:14:11 +0000164
Evgeniy Stepanove3eaa7b2013-09-02 09:24:53 +0000165INTERCEPTOR(void *, valloc, SIZE_T size) {
166 GET_MALLOC_STACK_TRACE;
167 void *ptr = MsanReallocate(&stack, 0, size, GetPageSizeCached(), false);
168 return ptr;
169}
170
171INTERCEPTOR(void *, pvalloc, SIZE_T size) {
172 GET_MALLOC_STACK_TRACE;
173 uptr PageSize = GetPageSizeCached();
174 size = RoundUpTo(size, PageSize);
175 if (size == 0) {
176 // pvalloc(0) should allocate one page.
177 size = PageSize;
178 }
179 void *ptr = MsanReallocate(&stack, 0, size, PageSize, false);
180 return ptr;
181}
182
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000183INTERCEPTOR(void, free, void *ptr) {
Evgeniy Stepanov65562f52013-09-16 11:03:31 +0000184 GET_MALLOC_STACK_TRACE;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000185 if (ptr == 0) return;
Evgeniy Stepanov65562f52013-09-16 11:03:31 +0000186 MsanDeallocate(&stack, ptr);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000187}
188
Evgeniy Stepanov9dcd5a32014-03-27 13:29:29 +0000189INTERCEPTOR(void, cfree, void *ptr) {
190 GET_MALLOC_STACK_TRACE;
191 if (ptr == 0) return;
192 MsanDeallocate(&stack, ptr);
193}
194
195INTERCEPTOR(uptr, malloc_usable_size, void *ptr) {
196 return __msan_get_allocated_size(ptr);
197}
198
199// This function actually returns a struct by value, but we can't unpoison a
200// temporary! The following is equivalent on all supported platforms, and we
201// have a test to confirm that.
202INTERCEPTOR(void, mallinfo, __sanitizer_mallinfo *sret) {
203 REAL(memset)(sret, 0, sizeof(*sret));
204 __msan_unpoison(sret, sizeof(*sret));
205}
206
207INTERCEPTOR(int, mallopt, int cmd, int value) {
208 return -1;
209}
210
211INTERCEPTOR(void, malloc_stats, void) {
212 // FIXME: implement, but don't call REAL(malloc_stats)!
213}
214
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000215INTERCEPTOR(SIZE_T, strlen, const char *s) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000216 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000217 SIZE_T res = REAL(strlen)(s);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000218 CHECK_UNPOISONED(s, res + 1);
219 return res;
220}
221
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000222INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000223 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000224 SIZE_T res = REAL(strnlen)(s, n);
225 SIZE_T scan_size = (res == n) ? res : res + 1;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000226 CHECK_UNPOISONED(s, scan_size);
227 return res;
228}
229
230// FIXME: Add stricter shadow checks in str* interceptors (ex.: strcpy should
231// check the shadow of the terminating \0 byte).
232
233INTERCEPTOR(char *, strcpy, char *dest, const char *src) { // NOLINT
234 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000235 GET_STORE_STACK_TRACE;
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000236 SIZE_T n = REAL(strlen)(src);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000237 char *res = REAL(strcpy)(dest, src); // NOLINT
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000238 CopyPoison(dest, src, n + 1, &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000239 return res;
240}
241
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000242INTERCEPTOR(char *, strncpy, char *dest, const char *src, SIZE_T n) { // NOLINT
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000243 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000244 GET_STORE_STACK_TRACE;
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000245 SIZE_T copy_size = REAL(strnlen)(src, n);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000246 if (copy_size < n)
247 copy_size++; // trailing \0
248 char *res = REAL(strncpy)(dest, src, n); // NOLINT
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000249 CopyPoison(dest, src, copy_size, &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000250 return res;
251}
252
Evgeniy Stepanov654688b2013-07-01 15:19:37 +0000253INTERCEPTOR(char *, stpcpy, char *dest, const char *src) { // NOLINT
254 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000255 GET_STORE_STACK_TRACE;
Evgeniy Stepanov654688b2013-07-01 15:19:37 +0000256 SIZE_T n = REAL(strlen)(src);
257 char *res = REAL(stpcpy)(dest, src); // NOLINT
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000258 CopyPoison(dest, src, n + 1, &stack);
Evgeniy Stepanov654688b2013-07-01 15:19:37 +0000259 return res;
260}
261
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000262INTERCEPTOR(char *, strdup, char *src) {
263 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000264 GET_STORE_STACK_TRACE;
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000265 SIZE_T n = REAL(strlen)(src);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000266 char *res = REAL(strdup)(src);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000267 CopyPoison(res, src, n + 1, &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000268 return res;
269}
270
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000271INTERCEPTOR(char *, __strdup, char *src) {
272 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000273 GET_STORE_STACK_TRACE;
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000274 SIZE_T n = REAL(strlen)(src);
275 char *res = REAL(__strdup)(src);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000276 CopyPoison(res, src, n + 1, &stack);
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000277 return res;
278}
279
280INTERCEPTOR(char *, strndup, char *src, SIZE_T n) {
281 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000282 GET_STORE_STACK_TRACE;
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000283 SIZE_T copy_size = REAL(strnlen)(src, n);
284 char *res = REAL(strndup)(src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000285 CopyPoison(res, src, copy_size, &stack);
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000286 __msan_unpoison(res + copy_size, 1); // \0
287 return res;
288}
289
290INTERCEPTOR(char *, __strndup, char *src, SIZE_T n) {
291 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000292 GET_STORE_STACK_TRACE;
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000293 SIZE_T copy_size = REAL(strnlen)(src, n);
294 char *res = REAL(__strndup)(src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000295 CopyPoison(res, src, copy_size, &stack);
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +0000296 __msan_unpoison(res + copy_size, 1); // \0
297 return res;
298}
299
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000300INTERCEPTOR(char *, gcvt, double number, SIZE_T ndigit, char *buf) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000301 ENSURE_MSAN_INITED();
302 char *res = REAL(gcvt)(number, ndigit, buf);
303 // DynamoRio tool will take care of unpoisoning gcvt result for us.
304 if (!__msan_has_dynamic_component()) {
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000305 SIZE_T n = REAL(strlen)(buf);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000306 __msan_unpoison(buf, n + 1);
307 }
308 return res;
309}
310
311INTERCEPTOR(char *, strcat, char *dest, const char *src) { // NOLINT
312 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000313 GET_STORE_STACK_TRACE;
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000314 SIZE_T src_size = REAL(strlen)(src);
315 SIZE_T dest_size = REAL(strlen)(dest);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000316 char *res = REAL(strcat)(dest, src); // NOLINT
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000317 CopyPoison(dest + dest_size, src, src_size + 1, &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000318 return res;
319}
320
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000321INTERCEPTOR(char *, strncat, char *dest, const char *src, SIZE_T n) { // NOLINT
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000322 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000323 GET_STORE_STACK_TRACE;
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000324 SIZE_T dest_size = REAL(strlen)(dest);
Evgeniy Stepanov3158ec42013-12-13 16:31:59 +0000325 SIZE_T copy_size = REAL(strnlen)(src, n);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000326 char *res = REAL(strncat)(dest, src, n); // NOLINT
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000327 CopyPoison(dest + dest_size, src, copy_size, &stack);
Evgeniy Stepanov3158ec42013-12-13 16:31:59 +0000328 __msan_unpoison(dest + dest_size + copy_size, 1); // \0
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000329 return res;
330}
331
Sergey Matveev1394f2d2014-01-28 13:45:58 +0000332// Hack: always pass nptr and endptr as part of __VA_ARGS_ to avoid having to
333// deal with empty __VA_ARGS__ in the case of INTERCEPTOR_STRTO.
334#define INTERCEPTOR_STRTO_BODY(ret_type, func, ...) \
335 ENSURE_MSAN_INITED(); \
336 ret_type res = REAL(func)(__VA_ARGS__); \
337 if (!__msan_has_dynamic_component()) { \
338 __msan_unpoison(endptr, sizeof(*endptr)); \
339 } \
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000340 return res;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000341
Sergey Matveev1394f2d2014-01-28 13:45:58 +0000342#define INTERCEPTOR_STRTO(ret_type, func) \
343 INTERCEPTOR(ret_type, func, const char *nptr, char **endptr) { \
344 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr); \
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000345 }
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000346
Sergey Matveev1394f2d2014-01-28 13:45:58 +0000347#define INTERCEPTOR_STRTO_BASE(ret_type, func) \
348 INTERCEPTOR(ret_type, func, const char *nptr, char **endptr, int base) { \
349 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, base); \
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000350 }
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000351
Sergey Matveev1394f2d2014-01-28 13:45:58 +0000352#define INTERCEPTOR_STRTO_LOC(ret_type, func) \
353 INTERCEPTOR(ret_type, func, const char *nptr, char **endptr, void *loc) { \
354 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, loc); \
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000355 }
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000356
Sergey Matveev1394f2d2014-01-28 13:45:58 +0000357#define INTERCEPTOR_STRTO_BASE_LOC(ret_type, func) \
358 INTERCEPTOR(ret_type, func, const char *nptr, char **endptr, int base, \
359 void *loc) { \
360 INTERCEPTOR_STRTO_BODY(ret_type, func, nptr, endptr, base, loc); \
Evgeniy Stepanove3a32512013-01-17 13:42:17 +0000361 }
Evgeniy Stepanove3a32512013-01-17 13:42:17 +0000362
Sergey Matveev1394f2d2014-01-28 13:45:58 +0000363INTERCEPTOR_STRTO(double, strtod) // NOLINT
364INTERCEPTOR_STRTO(float, strtof) // NOLINT
365INTERCEPTOR_STRTO(long double, strtold) // NOLINT
366INTERCEPTOR_STRTO_BASE(long, strtol) // NOLINT
367INTERCEPTOR_STRTO_BASE(long long, strtoll) // NOLINT
368INTERCEPTOR_STRTO_BASE(unsigned long, strtoul) // NOLINT
369INTERCEPTOR_STRTO_BASE(unsigned long long, strtoull) // NOLINT
370INTERCEPTOR_STRTO_LOC(double, strtod_l) // NOLINT
371INTERCEPTOR_STRTO_LOC(double, __strtod_l) // NOLINT
372INTERCEPTOR_STRTO_LOC(float, strtof_l) // NOLINT
373INTERCEPTOR_STRTO_LOC(float, __strtof_l) // NOLINT
374INTERCEPTOR_STRTO_LOC(long double, strtold_l) // NOLINT
375INTERCEPTOR_STRTO_LOC(long double, __strtold_l) // NOLINT
376INTERCEPTOR_STRTO_BASE_LOC(long, strtol_l) // NOLINT
377INTERCEPTOR_STRTO_BASE_LOC(long long, strtoll_l) // NOLINT
378INTERCEPTOR_STRTO_BASE_LOC(unsigned long, strtoul_l) // NOLINT
379INTERCEPTOR_STRTO_BASE_LOC(unsigned long long, strtoull_l) // NOLINT
Evgeniy Stepanov7aacd9c2013-10-14 11:52:40 +0000380
Evgeniy Stepanovb58b72e2013-06-21 13:32:26 +0000381INTERCEPTOR(int, vasprintf, char **strp, const char *format, va_list ap) {
382 ENSURE_MSAN_INITED();
383 int res = REAL(vasprintf)(strp, format, ap);
384 if (res >= 0 && !__msan_has_dynamic_component()) {
385 __msan_unpoison(strp, sizeof(*strp));
386 __msan_unpoison(*strp, res + 1);
387 }
388 return res;
389}
390
391INTERCEPTOR(int, asprintf, char **strp, const char *format, ...) { // NOLINT
392 ENSURE_MSAN_INITED();
393 va_list ap;
394 va_start(ap, format);
395 int res = vasprintf(strp, format, ap); // NOLINT
396 va_end(ap);
397 return res;
398}
399
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000400INTERCEPTOR(int, vsnprintf, char *str, uptr size,
401 const char *format, va_list ap) {
402 ENSURE_MSAN_INITED();
403 int res = REAL(vsnprintf)(str, size, format, ap);
Evgeniy Stepanovb58b72e2013-06-21 13:32:26 +0000404 if (res >= 0 && !__msan_has_dynamic_component()) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000405 __msan_unpoison(str, res + 1);
406 }
407 return res;
408}
409
410INTERCEPTOR(int, vsprintf, char *str, const char *format, va_list ap) {
411 ENSURE_MSAN_INITED();
412 int res = REAL(vsprintf)(str, format, ap);
Evgeniy Stepanovb58b72e2013-06-21 13:32:26 +0000413 if (res >= 0 && !__msan_has_dynamic_component()) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000414 __msan_unpoison(str, res + 1);
415 }
416 return res;
417}
418
419INTERCEPTOR(int, vswprintf, void *str, uptr size, void *format, va_list ap) {
420 ENSURE_MSAN_INITED();
421 int res = REAL(vswprintf)(str, size, format, ap);
Evgeniy Stepanovb58b72e2013-06-21 13:32:26 +0000422 if (res >= 0 && !__msan_has_dynamic_component()) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000423 __msan_unpoison(str, 4 * (res + 1));
424 }
425 return res;
426}
427
428INTERCEPTOR(int, sprintf, char *str, const char *format, ...) { // NOLINT
429 ENSURE_MSAN_INITED();
430 va_list ap;
431 va_start(ap, format);
432 int res = vsprintf(str, format, ap); // NOLINT
433 va_end(ap);
434 return res;
435}
436
437INTERCEPTOR(int, snprintf, char *str, uptr size, const char *format, ...) {
438 ENSURE_MSAN_INITED();
439 va_list ap;
440 va_start(ap, format);
441 int res = vsnprintf(str, size, format, ap);
442 va_end(ap);
443 return res;
444}
445
446INTERCEPTOR(int, swprintf, void *str, uptr size, void *format, ...) {
447 ENSURE_MSAN_INITED();
448 va_list ap;
449 va_start(ap, format);
450 int res = vswprintf(str, size, format, ap);
451 va_end(ap);
452 return res;
453}
454
Evgeniy Stepanov9ce9a6c2014-04-14 14:59:42 +0000455#define INTERCEPTOR_STRFTIME_BODY(char_type, ret_type, func, s, ...) \
456 ENSURE_MSAN_INITED(); \
457 ret_type res = REAL(func)(s, __VA_ARGS__); \
458 if (s) __msan_unpoison(s, sizeof(char_type) * (res + 1)); \
459 return res;
460
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000461INTERCEPTOR(SIZE_T, strftime, char *s, SIZE_T max, const char *format,
Evgeniy Stepanova6b5eec2013-11-02 01:01:35 +0000462 __sanitizer_tm *tm) {
Evgeniy Stepanov9ce9a6c2014-04-14 14:59:42 +0000463 INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, strftime, s, max, format, tm);
464}
465
466INTERCEPTOR(SIZE_T, strftime_l, char *s, SIZE_T max, const char *format,
467 __sanitizer_tm *tm, void *loc) {
468 INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, strftime_l, s, max, format, tm, loc);
469}
470
471INTERCEPTOR(SIZE_T, __strftime_l, char *s, SIZE_T max, const char *format,
472 __sanitizer_tm *tm, void *loc) {
473 INTERCEPTOR_STRFTIME_BODY(char, SIZE_T, __strftime_l, s, max, format, tm,
474 loc);
475}
476
477INTERCEPTOR(SIZE_T, wcsftime, wchar_t *s, SIZE_T max, const wchar_t *format,
478 __sanitizer_tm *tm) {
479 INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, wcsftime, s, max, format, tm);
480}
481
482INTERCEPTOR(SIZE_T, wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format,
483 __sanitizer_tm *tm, void *loc) {
484 INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, wcsftime_l, s, max, format, tm,
485 loc);
486}
487
488INTERCEPTOR(SIZE_T, __wcsftime_l, wchar_t *s, SIZE_T max, const wchar_t *format,
489 __sanitizer_tm *tm, void *loc) {
490 INTERCEPTOR_STRFTIME_BODY(wchar_t, SIZE_T, __wcsftime_l, s, max, format, tm,
491 loc);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000492}
493
Evgeniy Stepanov165d7592013-07-02 13:34:44 +0000494INTERCEPTOR(int, mbtowc, wchar_t *dest, const char *src, SIZE_T n) {
495 ENSURE_MSAN_INITED();
496 int res = REAL(mbtowc)(dest, src, n);
497 if (res != -1 && dest) __msan_unpoison(dest, sizeof(wchar_t));
498 return res;
499}
500
501INTERCEPTOR(int, mbrtowc, wchar_t *dest, const char *src, SIZE_T n, void *ps) {
502 ENSURE_MSAN_INITED();
503 SIZE_T res = REAL(mbrtowc)(dest, src, n, ps);
504 if (res != (SIZE_T)-1 && dest) __msan_unpoison(dest, sizeof(wchar_t));
505 return res;
506}
507
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000508INTERCEPTOR(SIZE_T, wcslen, const wchar_t *s) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000509 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000510 SIZE_T res = REAL(wcslen)(s);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000511 CHECK_UNPOISONED(s, sizeof(wchar_t) * (res + 1));
512 return res;
513}
514
515// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
516INTERCEPTOR(wchar_t *, wcschr, void *s, wchar_t wc, void *ps) {
517 ENSURE_MSAN_INITED();
518 wchar_t *res = REAL(wcschr)(s, wc, ps);
519 return res;
520}
521
522// wchar_t *wcscpy(wchar_t *dest, const wchar_t *src);
523INTERCEPTOR(wchar_t *, wcscpy, wchar_t *dest, const wchar_t *src) {
524 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000525 GET_STORE_STACK_TRACE;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000526 wchar_t *res = REAL(wcscpy)(dest, src);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000527 CopyPoison(dest, src, sizeof(wchar_t) * (REAL(wcslen)(src) + 1), &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000528 return res;
529}
530
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000531// wchar_t *wmemcpy(wchar_t *dest, const wchar_t *src, SIZE_T n);
532INTERCEPTOR(wchar_t *, wmemcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000533 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000534 GET_STORE_STACK_TRACE;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000535 wchar_t *res = REAL(wmemcpy)(dest, src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000536 CopyPoison(dest, src, n * sizeof(wchar_t), &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000537 return res;
538}
539
Evgeniy Stepanovaa23bd82013-07-02 14:49:24 +0000540INTERCEPTOR(wchar_t *, wmempcpy, wchar_t *dest, const wchar_t *src, SIZE_T n) {
541 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000542 GET_STORE_STACK_TRACE;
Evgeniy Stepanovaa23bd82013-07-02 14:49:24 +0000543 wchar_t *res = REAL(wmempcpy)(dest, src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000544 CopyPoison(dest, src, n * sizeof(wchar_t), &stack);
Evgeniy Stepanovaa23bd82013-07-02 14:49:24 +0000545 return res;
546}
547
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000548INTERCEPTOR(wchar_t *, wmemset, wchar_t *s, wchar_t c, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000549 CHECK(MEM_IS_APP(s));
550 ENSURE_MSAN_INITED();
551 wchar_t *res = (wchar_t *)fast_memset(s, c, n * sizeof(wchar_t));
552 __msan_unpoison(s, n * sizeof(wchar_t));
553 return res;
554}
555
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000556INTERCEPTOR(wchar_t *, wmemmove, wchar_t *dest, const wchar_t *src, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000557 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000558 GET_STORE_STACK_TRACE;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000559 wchar_t *res = REAL(wmemmove)(dest, src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +0000560 MovePoison(dest, src, n * sizeof(wchar_t), &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000561 return res;
562}
563
564INTERCEPTOR(int, wcscmp, const wchar_t *s1, const wchar_t *s2) {
565 ENSURE_MSAN_INITED();
566 int res = REAL(wcscmp)(s1, s2);
567 return res;
568}
569
570INTERCEPTOR(double, wcstod, const wchar_t *nptr, wchar_t **endptr) {
571 ENSURE_MSAN_INITED();
572 double res = REAL(wcstod)(nptr, endptr);
573 __msan_unpoison(endptr, sizeof(*endptr));
574 return res;
575}
576
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000577INTERCEPTOR(int, gettimeofday, void *tv, void *tz) {
578 ENSURE_MSAN_INITED();
579 int res = REAL(gettimeofday)(tv, tz);
580 if (tv)
581 __msan_unpoison(tv, 16);
582 if (tz)
583 __msan_unpoison(tz, 8);
584 return res;
585}
586
587INTERCEPTOR(char *, fcvt, double x, int a, int *b, int *c) {
588 ENSURE_MSAN_INITED();
589 char *res = REAL(fcvt)(x, a, b, c);
590 if (!__msan_has_dynamic_component()) {
591 __msan_unpoison(b, sizeof(*b));
592 __msan_unpoison(c, sizeof(*c));
593 }
594 return res;
595}
596
597INTERCEPTOR(char *, getenv, char *name) {
598 ENSURE_MSAN_INITED();
599 char *res = REAL(getenv)(name);
600 if (!__msan_has_dynamic_component()) {
601 if (res)
602 __msan_unpoison(res, REAL(strlen)(res) + 1);
603 }
604 return res;
605}
606
Evgeniy Stepanov5dbedf62013-08-01 11:14:14 +0000607extern char **environ;
608
609static void UnpoisonEnviron() {
610 char **envp = environ;
611 for (; *envp; ++envp) {
612 __msan_unpoison(envp, sizeof(*envp));
613 __msan_unpoison(*envp, REAL(strlen)(*envp) + 1);
614 }
615 // Trailing NULL pointer.
616 __msan_unpoison(envp, sizeof(*envp));
617}
618
619INTERCEPTOR(int, setenv, const char *name, const char *value, int overwrite) {
620 ENSURE_MSAN_INITED();
621 int res = REAL(setenv)(name, value, overwrite);
622 if (!res) UnpoisonEnviron();
623 return res;
624}
625
626INTERCEPTOR(int, putenv, char *string) {
627 ENSURE_MSAN_INITED();
628 int res = REAL(putenv)(string);
629 if (!res) UnpoisonEnviron();
630 return res;
631}
632
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000633INTERCEPTOR(int, __fxstat, int magic, int fd, void *buf) {
634 ENSURE_MSAN_INITED();
635 int res = REAL(__fxstat)(magic, fd, buf);
636 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000637 __msan_unpoison(buf, __sanitizer::struct_stat_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000638 return res;
639}
640
641INTERCEPTOR(int, __fxstat64, int magic, int fd, void *buf) {
642 ENSURE_MSAN_INITED();
643 int res = REAL(__fxstat64)(magic, fd, buf);
644 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000645 __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000646 return res;
647}
648
Evgeniy Stepanov842fa3f2013-09-09 13:40:41 +0000649INTERCEPTOR(int, __fxstatat, int magic, int fd, char *pathname, void *buf,
650 int flags) {
651 ENSURE_MSAN_INITED();
652 int res = REAL(__fxstatat)(magic, fd, pathname, buf, flags);
653 if (!res) __msan_unpoison(buf, __sanitizer::struct_stat_sz);
654 return res;
655}
656
657INTERCEPTOR(int, __fxstatat64, int magic, int fd, char *pathname, void *buf,
658 int flags) {
659 ENSURE_MSAN_INITED();
660 int res = REAL(__fxstatat64)(magic, fd, pathname, buf, flags);
661 if (!res) __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
662 return res;
663}
664
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000665INTERCEPTOR(int, __xstat, int magic, char *path, void *buf) {
666 ENSURE_MSAN_INITED();
667 int res = REAL(__xstat)(magic, path, buf);
668 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000669 __msan_unpoison(buf, __sanitizer::struct_stat_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000670 return res;
671}
672
673INTERCEPTOR(int, __xstat64, int magic, char *path, void *buf) {
674 ENSURE_MSAN_INITED();
675 int res = REAL(__xstat64)(magic, path, buf);
676 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000677 __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000678 return res;
679}
680
681INTERCEPTOR(int, __lxstat, int magic, char *path, void *buf) {
682 ENSURE_MSAN_INITED();
683 int res = REAL(__lxstat)(magic, path, buf);
684 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000685 __msan_unpoison(buf, __sanitizer::struct_stat_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000686 return res;
687}
688
689INTERCEPTOR(int, __lxstat64, int magic, char *path, void *buf) {
690 ENSURE_MSAN_INITED();
691 int res = REAL(__lxstat64)(magic, path, buf);
692 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000693 __msan_unpoison(buf, __sanitizer::struct_stat64_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000694 return res;
695}
696
697INTERCEPTOR(int, pipe, int pipefd[2]) {
698 if (msan_init_is_running)
699 return REAL(pipe)(pipefd);
700 ENSURE_MSAN_INITED();
701 int res = REAL(pipe)(pipefd);
702 if (!res)
703 __msan_unpoison(pipefd, sizeof(int[2]));
704 return res;
705}
706
Evgeniy Stepanovb4eac2f2013-04-08 13:45:12 +0000707INTERCEPTOR(int, pipe2, int pipefd[2], int flags) {
708 ENSURE_MSAN_INITED();
709 int res = REAL(pipe2)(pipefd, flags);
710 if (!res)
711 __msan_unpoison(pipefd, sizeof(int[2]));
712 return res;
713}
714
715INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int sv[2]) {
716 ENSURE_MSAN_INITED();
717 int res = REAL(socketpair)(domain, type, protocol, sv);
718 if (!res)
719 __msan_unpoison(sv, sizeof(int[2]));
720 return res;
721}
722
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000723INTERCEPTOR(char *, fgets, char *s, int size, void *stream) {
724 ENSURE_MSAN_INITED();
725 char *res = REAL(fgets)(s, size, stream);
726 if (res)
727 __msan_unpoison(s, REAL(strlen)(s) + 1);
728 return res;
729}
730
731INTERCEPTOR(char *, fgets_unlocked, char *s, int size, void *stream) {
732 ENSURE_MSAN_INITED();
733 char *res = REAL(fgets_unlocked)(s, size, stream);
734 if (res)
735 __msan_unpoison(s, REAL(strlen)(s) + 1);
736 return res;
737}
738
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000739INTERCEPTOR(int, getrlimit, int resource, void *rlim) {
740 if (msan_init_is_running)
741 return REAL(getrlimit)(resource, rlim);
742 ENSURE_MSAN_INITED();
743 int res = REAL(getrlimit)(resource, rlim);
744 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000745 __msan_unpoison(rlim, __sanitizer::struct_rlimit_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000746 return res;
747}
748
749INTERCEPTOR(int, getrlimit64, int resource, void *rlim) {
750 if (msan_init_is_running)
751 return REAL(getrlimit64)(resource, rlim);
752 ENSURE_MSAN_INITED();
753 int res = REAL(getrlimit64)(resource, rlim);
754 if (!res)
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000755 __msan_unpoison(rlim, __sanitizer::struct_rlimit64_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000756 return res;
757}
758
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000759INTERCEPTOR(int, uname, void *utsname) {
760 ENSURE_MSAN_INITED();
761 int res = REAL(uname)(utsname);
762 if (!res) {
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000763 __msan_unpoison(utsname, __sanitizer::struct_utsname_sz);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000764 }
765 return res;
766}
767
Evgeniy Stepanovffffbef2013-01-23 10:43:38 +0000768INTERCEPTOR(int, gethostname, char *name, SIZE_T len) {
769 ENSURE_MSAN_INITED();
770 int res = REAL(gethostname)(name, len);
771 if (!res) {
772 SIZE_T real_len = REAL(strnlen)(name, len);
773 if (real_len < len)
774 ++real_len;
775 __msan_unpoison(name, real_len);
776 }
777 return res;
778}
779
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000780INTERCEPTOR(int, epoll_wait, int epfd, void *events, int maxevents,
781 int timeout) {
782 ENSURE_MSAN_INITED();
783 int res = REAL(epoll_wait)(epfd, events, maxevents, timeout);
784 if (res > 0) {
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000785 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000786 }
787 return res;
788}
789
790INTERCEPTOR(int, epoll_pwait, int epfd, void *events, int maxevents,
791 int timeout, void *sigmask) {
792 ENSURE_MSAN_INITED();
793 int res = REAL(epoll_pwait)(epfd, events, maxevents, timeout, sigmask);
794 if (res > 0) {
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000795 __msan_unpoison(events, __sanitizer::struct_epoll_event_sz * res);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000796 }
797 return res;
798}
799
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000800INTERCEPTOR(SSIZE_T, recv, int fd, void *buf, SIZE_T len, int flags) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000801 ENSURE_MSAN_INITED();
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000802 SSIZE_T res = REAL(recv)(fd, buf, len, flags);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000803 if (res > 0)
804 __msan_unpoison(buf, res);
805 return res;
806}
807
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000808INTERCEPTOR(SSIZE_T, recvfrom, int fd, void *buf, SIZE_T len, int flags,
Evgeniy Stepanova4d08c42013-05-29 11:30:00 +0000809 void *srcaddr, int *addrlen) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000810 ENSURE_MSAN_INITED();
Evgeniy Stepanov84f46d92012-12-25 16:51:57 +0000811 SIZE_T srcaddr_sz;
Evgeniy Stepanova4d08c42013-05-29 11:30:00 +0000812 if (srcaddr) srcaddr_sz = *addrlen;
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000813 SSIZE_T res = REAL(recvfrom)(fd, buf, len, flags, srcaddr, addrlen);
Evgeniy Stepanov84f46d92012-12-25 16:51:57 +0000814 if (res > 0) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000815 __msan_unpoison(buf, res);
Evgeniy Stepanov84f46d92012-12-25 16:51:57 +0000816 if (srcaddr) {
Evgeniy Stepanova4d08c42013-05-29 11:30:00 +0000817 SIZE_T sz = *addrlen;
Evgeniy Stepanov84f46d92012-12-25 16:51:57 +0000818 __msan_unpoison(srcaddr, (sz < srcaddr_sz) ? sz : srcaddr_sz);
819 }
820 }
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000821 return res;
822}
823
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000824INTERCEPTOR(void *, calloc, SIZE_T nmemb, SIZE_T size) {
Kostya Serebryany6c5b0342013-09-06 10:58:55 +0000825 if (CallocShouldReturnNullDueToOverflow(size, nmemb))
826 return AllocatorReturnNull();
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000827 GET_MALLOC_STACK_TRACE;
828 if (!msan_inited) {
829 // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000830 const SIZE_T kCallocPoolSize = 1024;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000831 static uptr calloc_memory_for_dlsym[kCallocPoolSize];
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000832 static SIZE_T allocated;
833 SIZE_T size_in_words = ((nmemb * size) + kWordSize - 1) / kWordSize;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000834 void *mem = (void*)&calloc_memory_for_dlsym[allocated];
835 allocated += size_in_words;
836 CHECK(allocated < kCallocPoolSize);
837 return mem;
838 }
839 return MsanReallocate(&stack, 0, nmemb * size, sizeof(u64), true);
840}
841
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000842INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000843 GET_MALLOC_STACK_TRACE;
844 return MsanReallocate(&stack, ptr, size, sizeof(u64), false);
845}
846
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000847INTERCEPTOR(void *, malloc, SIZE_T size) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000848 GET_MALLOC_STACK_TRACE;
849 return MsanReallocate(&stack, 0, size, sizeof(u64), false);
850}
851
Alexey Samsonov34093f02013-04-23 13:34:19 +0000852void __msan_allocated_memory(const void* data, uptr size) {
Evgeniy Stepanov9f7e8c12013-01-28 13:52:49 +0000853 GET_MALLOC_STACK_TRACE;
854 if (flags()->poison_in_malloc)
855 __msan_poison(data, size);
856 if (__msan_get_track_origins()) {
857 u32 stack_id = StackDepotPut(stack.trace, stack.size);
858 CHECK(stack_id);
859 CHECK_EQ((stack_id >> 31), 0); // Higher bit is occupied by stack origins.
860 __msan_set_origin(data, size, stack_id);
861 }
862}
863
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000864INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags,
865 int fd, OFF_T offset) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000866 ENSURE_MSAN_INITED();
Evgeniy Stepanov067f5472014-01-27 09:12:22 +0000867 if (addr && !MEM_IS_APP(addr)) {
Evgeniy Stepanov791a7e12014-02-10 09:37:03 +0000868 if (flags & map_fixed) {
869 *__errno_location() = errno_EINVAL;
870 return (void *)-1;
871 } else {
872 addr = 0;
873 }
Evgeniy Stepanov067f5472014-01-27 09:12:22 +0000874 }
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000875 void *res = REAL(mmap)(addr, length, prot, flags, fd, offset);
876 if (res != (void*)-1)
877 __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
878 return res;
879}
880
Kostya Serebryany07bb3922012-12-13 06:31:40 +0000881INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags,
882 int fd, OFF64_T offset) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000883 ENSURE_MSAN_INITED();
Evgeniy Stepanovfb74ea82014-02-14 09:49:29 +0000884 if (addr && !MEM_IS_APP(addr)) {
885 if (flags & map_fixed) {
886 *__errno_location() = errno_EINVAL;
887 return (void *)-1;
888 } else {
889 addr = 0;
890 }
891 }
Evgeniy Stepanovc5033782012-12-11 12:27:27 +0000892 void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset);
893 if (res != (void*)-1)
894 __msan_unpoison(res, RoundUpTo(length, GetPageSize()));
895 return res;
896}
897
Evgeniy Stepanove3a32512013-01-17 13:42:17 +0000898struct dlinfo {
899 char *dli_fname;
900 void *dli_fbase;
901 char *dli_sname;
902 void *dli_saddr;
903};
904
905INTERCEPTOR(int, dladdr, void *addr, dlinfo *info) {
906 ENSURE_MSAN_INITED();
907 int res = REAL(dladdr)(addr, info);
908 if (res != 0) {
909 __msan_unpoison(info, sizeof(*info));
910 if (info->dli_fname)
911 __msan_unpoison(info->dli_fname, REAL(strlen)(info->dli_fname) + 1);
912 if (info->dli_sname)
913 __msan_unpoison(info->dli_sname, REAL(strlen)(info->dli_sname) + 1);
914 }
915 return res;
916}
917
Evgeniy Stepanovb1fa8102014-01-23 08:43:12 +0000918INTERCEPTOR(char *, dlerror, int fake) {
Evgeniy Stepanov13322c62013-10-31 16:58:44 +0000919 ENSURE_MSAN_INITED();
Evgeniy Stepanovb1fa8102014-01-23 08:43:12 +0000920 char *res = REAL(dlerror)(fake);
Evgeniy Stepanov13322c62013-10-31 16:58:44 +0000921 if (res != 0) __msan_unpoison(res, REAL(strlen)(res) + 1);
922 return res;
923}
924
Reid Klecknerc9d382b2013-03-11 18:07:42 +0000925// dlopen() ultimately calls mmap() down inside the loader, which generally
926// doesn't participate in dynamic symbol resolution. Therefore we won't
927// intercept its calls to mmap, and we have to hook it here. The loader
928// initializes the module before returning, so without the dynamic component, we
929// won't be able to clear the shadow before the initializers. Fixing this would
930// require putting our own initializer first to clear the shadow.
931INTERCEPTOR(void *, dlopen, const char *filename, int flag) {
932 ENSURE_MSAN_INITED();
933 EnterLoader();
934 link_map *map = (link_map *)REAL(dlopen)(filename, flag);
935 ExitLoader();
Evgeniy Stepanovecbf6462013-03-22 11:59:49 +0000936 if (!__msan_has_dynamic_component() && map) {
Reid Klecknerc9d382b2013-03-11 18:07:42 +0000937 // If msandr didn't clear the shadow before the initializers ran, we do it
938 // ourselves afterwards.
Peter Collingbourne9058c072013-07-29 19:09:49 +0000939 ForEachMappedRegion(map, __msan_unpoison);
Reid Klecknerc9d382b2013-03-11 18:07:42 +0000940 }
941 return (void *)map;
942}
943
Evgeniy Stepanovff6728f2013-05-17 12:51:13 +0000944typedef int (*dl_iterate_phdr_cb)(__sanitizer_dl_phdr_info *info, SIZE_T size,
945 void *data);
Evgeniy Stepanov87c6ec72013-05-16 13:00:25 +0000946struct dl_iterate_phdr_data {
947 dl_iterate_phdr_cb callback;
948 void *data;
949};
950
Evgeniy Stepanovff6728f2013-05-17 12:51:13 +0000951static int msan_dl_iterate_phdr_cb(__sanitizer_dl_phdr_info *info, SIZE_T size,
952 void *data) {
953 if (info) {
Evgeniy Stepanov87c6ec72013-05-16 13:00:25 +0000954 __msan_unpoison(info, size);
Evgeniy Stepanovff6728f2013-05-17 12:51:13 +0000955 if (info->dlpi_name)
956 __msan_unpoison(info->dlpi_name, REAL(strlen)(info->dlpi_name) + 1);
957 }
Evgeniy Stepanov87c6ec72013-05-16 13:00:25 +0000958 dl_iterate_phdr_data *cbdata = (dl_iterate_phdr_data *)data;
Alexey Samsonoved4594b2013-06-27 07:50:56 +0000959 UnpoisonParam(3);
Evgeniy Stepanov879c5522013-12-13 13:13:46 +0000960 return IndirectExternCall(cbdata->callback)(info, size, cbdata->data);
Evgeniy Stepanov87c6ec72013-05-16 13:00:25 +0000961}
962
963INTERCEPTOR(int, dl_iterate_phdr, dl_iterate_phdr_cb callback, void *data) {
964 ENSURE_MSAN_INITED();
965 EnterLoader();
966 dl_iterate_phdr_data cbdata;
967 cbdata.callback = callback;
968 cbdata.data = data;
969 int res = REAL(dl_iterate_phdr)(msan_dl_iterate_phdr_cb, (void *)&cbdata);
970 ExitLoader();
971 return res;
972}
973
Evgeniy Stepanove3a32512013-01-17 13:42:17 +0000974INTERCEPTOR(int, getrusage, int who, void *usage) {
975 ENSURE_MSAN_INITED();
976 int res = REAL(getrusage)(who, usage);
977 if (res == 0) {
Evgeniy Stepanovea61d082013-02-19 09:19:16 +0000978 __msan_unpoison(usage, __sanitizer::struct_rusage_sz);
Evgeniy Stepanove3a32512013-01-17 13:42:17 +0000979 }
980 return res;
981}
982
Evgeniy Stepanov5a7c3642014-04-23 14:01:57 +0000983class SignalHandlerScope {
984 public:
985 SignalHandlerScope() { GetCurrentThread()->EnterSignalHandler(); }
986 ~SignalHandlerScope() { GetCurrentThread()->LeaveSignalHandler(); }
987};
988
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +0000989// sigactions_mu guarantees atomicity of sigaction() and signal() calls.
990// Access to sigactions[] is gone with relaxed atomics to avoid data race with
991// the signal handler.
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +0000992const int kMaxSignals = 1024;
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +0000993static atomic_uintptr_t sigactions[kMaxSignals];
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +0000994static StaticSpinMutex sigactions_mu;
995
996static void SignalHandler(int signo) {
Evgeniy Stepanov5a7c3642014-04-23 14:01:57 +0000997 SignalHandlerScope signal_handler_scope;
Evgeniy Stepanovcb22c672013-08-27 14:08:15 +0000998 ScopedThreadLocalStateBackup stlsb;
Evgeniy Stepanovc4179812013-08-27 12:59:39 +0000999 UnpoisonParam(1);
1000
Kostya Serebryany5b4267f2013-04-05 14:40:25 +00001001 typedef void (*signal_cb)(int x);
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +00001002 signal_cb cb =
1003 (signal_cb)atomic_load(&sigactions[signo], memory_order_relaxed);
Evgeniy Stepanov879c5522013-12-13 13:13:46 +00001004 IndirectExternCall(cb)(signo);
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001005}
1006
1007static void SignalAction(int signo, void *si, void *uc) {
Evgeniy Stepanov5a7c3642014-04-23 14:01:57 +00001008 SignalHandlerScope signal_handler_scope;
Evgeniy Stepanovcb22c672013-08-27 14:08:15 +00001009 ScopedThreadLocalStateBackup stlsb;
Alexey Samsonoved4594b2013-06-27 07:50:56 +00001010 UnpoisonParam(3);
Evgeniy Stepanova40a0582013-08-27 11:10:04 +00001011 __msan_unpoison(si, sizeof(__sanitizer_sigaction));
Evgeniy Stepanov7b0e1322013-04-04 09:03:56 +00001012 __msan_unpoison(uc, __sanitizer::ucontext_t_sz);
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001013
1014 typedef void (*sigaction_cb)(int, void *, void *);
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +00001015 sigaction_cb cb =
1016 (sigaction_cb)atomic_load(&sigactions[signo], memory_order_relaxed);
Evgeniy Stepanov879c5522013-12-13 13:13:46 +00001017 IndirectExternCall(cb)(signo, si, uc);
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001018}
1019
1020INTERCEPTOR(int, sigaction, int signo, const __sanitizer_sigaction *act,
1021 __sanitizer_sigaction *oldact) {
Evgeniy Stepanovf8213b42013-04-01 14:47:21 +00001022 ENSURE_MSAN_INITED();
Kostya Serebryanyc3525ce2013-04-04 06:52:40 +00001023 // FIXME: check that *act is unpoisoned.
Evgeniy Stepanovf8213b42013-04-01 14:47:21 +00001024 // That requires intercepting all of sigemptyset, sigfillset, etc.
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001025 int res;
1026 if (flags()->wrap_signals) {
1027 SpinMutexLock lock(&sigactions_mu);
1028 CHECK_LT(signo, kMaxSignals);
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +00001029 uptr old_cb = atomic_load(&sigactions[signo], memory_order_relaxed);
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001030 __sanitizer_sigaction new_act;
1031 __sanitizer_sigaction *pnew_act = act ? &new_act : 0;
1032 if (act) {
Evgeniy Stepanova40a0582013-08-27 11:10:04 +00001033 internal_memcpy(pnew_act, act, sizeof(__sanitizer_sigaction));
Alexander Potapenkod5802fe2014-01-31 11:29:51 +00001034 uptr cb = (uptr)pnew_act->sigaction;
Evgeniy Stepanova40a0582013-08-27 11:10:04 +00001035 uptr new_cb = (pnew_act->sa_flags & __sanitizer::sa_siginfo)
1036 ? (uptr)SignalAction
1037 : (uptr)SignalHandler;
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001038 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +00001039 atomic_store(&sigactions[signo], cb, memory_order_relaxed);
Alexander Potapenkod5802fe2014-01-31 11:29:51 +00001040 pnew_act->sigaction = (void (*)(int, void *, void *))new_cb;
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001041 }
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001042 }
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001043 res = REAL(sigaction)(signo, pnew_act, oldact);
1044 if (res == 0 && oldact) {
Alexander Potapenkod5802fe2014-01-31 11:29:51 +00001045 uptr cb = (uptr)oldact->sigaction;
Evgeniy Stepanove7a7a9b2013-04-05 12:58:07 +00001046 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
Alexander Potapenkod5802fe2014-01-31 11:29:51 +00001047 oldact->sigaction = (void (*)(int, void *, void *))old_cb;
Evgeniy Stepanove7a7a9b2013-04-05 12:58:07 +00001048 }
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001049 }
1050 } else {
1051 res = REAL(sigaction)(signo, act, oldact);
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001052 }
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001053
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001054 if (res == 0 && oldact) {
Evgeniy Stepanova40a0582013-08-27 11:10:04 +00001055 __msan_unpoison(oldact, sizeof(__sanitizer_sigaction));
Evgeniy Stepanovf8213b42013-04-01 14:47:21 +00001056 }
1057 return res;
1058}
1059
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001060INTERCEPTOR(int, signal, int signo, uptr cb) {
1061 ENSURE_MSAN_INITED();
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001062 if (flags()->wrap_signals) {
1063 CHECK_LT(signo, kMaxSignals);
1064 SpinMutexLock lock(&sigactions_mu);
1065 if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
Evgeniy Stepanovbb25af52013-08-27 11:34:05 +00001066 atomic_store(&sigactions[signo], cb, memory_order_relaxed);
Evgeniy Stepanov7948c642013-04-05 11:59:16 +00001067 cb = (uptr) SignalHandler;
1068 }
1069 return REAL(signal)(signo, cb);
1070 } else {
1071 return REAL(signal)(signo, cb);
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001072 }
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001073}
1074
Evgeniy Stepanov98f5ea02013-03-13 09:01:40 +00001075extern "C" int pthread_attr_init(void *attr);
1076extern "C" int pthread_attr_destroy(void *attr);
Evgeniy Stepanov2794c472013-10-22 14:31:30 +00001077
1078static void *MsanThreadStartFunc(void *arg) {
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001079 MsanThread *t = (MsanThread *)arg;
1080 SetCurrentThread(t);
1081 return t->ThreadStart();
Evgeniy Stepanov2794c472013-10-22 14:31:30 +00001082}
Evgeniy Stepanov98f5ea02013-03-13 09:01:40 +00001083
1084INTERCEPTOR(int, pthread_create, void *th, void *attr, void *(*callback)(void*),
1085 void * param) {
1086 ENSURE_MSAN_INITED(); // for GetTlsSize()
1087 __sanitizer_pthread_attr_t myattr;
1088 if (attr == 0) {
1089 pthread_attr_init(&myattr);
1090 attr = &myattr;
1091 }
Evgeniy Stepanovb4a218d2013-03-19 09:30:52 +00001092
Kostya Serebryanycf5d8e42014-02-24 08:53:26 +00001093 AdjustStackSize(attr);
Evgeniy Stepanov98f5ea02013-03-13 09:01:40 +00001094
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001095 MsanThread *t = MsanThread::Create(callback, param);
Evgeniy Stepanov2794c472013-10-22 14:31:30 +00001096
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001097 int res = REAL(pthread_create)(th, attr, MsanThreadStartFunc, t);
Evgeniy Stepanov2794c472013-10-22 14:31:30 +00001098
Evgeniy Stepanov98f5ea02013-03-13 09:01:40 +00001099 if (attr == &myattr)
1100 pthread_attr_destroy(&myattr);
Evgeniy Stepanovf8213b42013-04-01 14:47:21 +00001101 if (!res) {
1102 __msan_unpoison(th, __sanitizer::pthread_t_sz);
1103 }
Evgeniy Stepanov98f5ea02013-03-13 09:01:40 +00001104 return res;
1105}
1106
Timur Iskhodzhanovd7eb6772013-07-15 16:11:39 +00001107INTERCEPTOR(int, pthread_key_create, __sanitizer_pthread_key_t *key,
1108 void (*dtor)(void *value)) {
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001109 if (msan_init_is_running) return REAL(pthread_key_create)(key, dtor);
Evgeniy Stepanov628d7272013-07-05 12:31:07 +00001110 ENSURE_MSAN_INITED();
1111 int res = REAL(pthread_key_create)(key, dtor);
1112 if (!res && key)
1113 __msan_unpoison(key, sizeof(*key));
1114 return res;
1115}
1116
Evgeniy Stepanov807e1312013-07-30 12:54:34 +00001117INTERCEPTOR(int, pthread_join, void *th, void **retval) {
1118 ENSURE_MSAN_INITED();
1119 int res = REAL(pthread_join)(th, retval);
1120 if (!res && retval)
1121 __msan_unpoison(retval, sizeof(*retval));
1122 return res;
1123}
1124
Evgeniy Stepanov9be91e92013-09-13 11:27:38 +00001125extern char *tzname[2];
1126
Evgeniy Stepanovb1fa8102014-01-23 08:43:12 +00001127INTERCEPTOR(void, tzset, int fake) {
Evgeniy Stepanov9be91e92013-09-13 11:27:38 +00001128 ENSURE_MSAN_INITED();
Evgeniy Stepanovb1fa8102014-01-23 08:43:12 +00001129 REAL(tzset)(fake);
Evgeniy Stepanov9be91e92013-09-13 11:27:38 +00001130 if (tzname[0])
1131 __msan_unpoison(tzname[0], REAL(strlen)(tzname[0]) + 1);
1132 if (tzname[1])
1133 __msan_unpoison(tzname[1], REAL(strlen)(tzname[1]) + 1);
1134 return;
1135}
1136
Evgeniy Stepanov022235c2013-09-27 11:32:21 +00001137struct MSanAtExitRecord {
1138 void (*func)(void *arg);
1139 void *arg;
1140};
1141
1142void MSanAtExitWrapper(void *arg) {
1143 UnpoisonParam(1);
1144 MSanAtExitRecord *r = (MSanAtExitRecord *)arg;
Evgeniy Stepanov879c5522013-12-13 13:13:46 +00001145 IndirectExternCall(r->func)(r->arg);
Evgeniy Stepanov022235c2013-09-27 11:32:21 +00001146 InternalFree(r);
1147}
1148
1149// Unpoison argument shadow for C++ module destructors.
1150INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg,
1151 void *dso_handle) {
1152 if (msan_init_is_running) return REAL(__cxa_atexit)(func, arg, dso_handle);
1153 ENSURE_MSAN_INITED();
1154 MSanAtExitRecord *r =
1155 (MSanAtExitRecord *)InternalAlloc(sizeof(MSanAtExitRecord));
1156 r->func = func;
1157 r->arg = arg;
1158 return REAL(__cxa_atexit)(MSanAtExitWrapper, r, dso_handle);
1159}
1160
Evgeniy Stepanov451c8de2013-10-29 02:48:49 +00001161DECLARE_REAL(int, shmctl, int shmid, int cmd, void *buf)
1162
1163INTERCEPTOR(void *, shmat, int shmid, const void *shmaddr, int shmflg) {
1164 ENSURE_MSAN_INITED();
1165 void *p = REAL(shmat)(shmid, shmaddr, shmflg);
1166 if (p != (void *)-1) {
1167 __sanitizer_shmid_ds ds;
1168 int res = REAL(shmctl)(shmid, shmctl_ipc_stat, &ds);
1169 if (!res) {
1170 __msan_unpoison(p, ds.shm_segsz);
1171 }
1172 }
1173 return p;
1174}
1175
Evgeniy Stepanova7add482013-10-31 15:51:22 +00001176// Linux kernel has a bug that leads to kernel deadlock if a process
1177// maps TBs of memory and then calls mlock().
1178static void MlockIsUnsupported() {
1179 static atomic_uint8_t printed;
1180 if (atomic_exchange(&printed, 1, memory_order_relaxed))
1181 return;
Sergey Matveev9be70fb2013-12-05 12:04:51 +00001182 VPrintf(1,
1183 "INFO: MemorySanitizer ignores mlock/mlockall/munlock/munlockall\n");
Evgeniy Stepanova7add482013-10-31 15:51:22 +00001184}
1185
1186INTERCEPTOR(int, mlock, const void *addr, uptr len) {
1187 MlockIsUnsupported();
1188 return 0;
1189}
1190
1191INTERCEPTOR(int, munlock, const void *addr, uptr len) {
1192 MlockIsUnsupported();
1193 return 0;
1194}
1195
1196INTERCEPTOR(int, mlockall, int flags) {
1197 MlockIsUnsupported();
1198 return 0;
1199}
1200
1201INTERCEPTOR(int, munlockall, void) {
1202 MlockIsUnsupported();
1203 return 0;
1204}
Evgeniy Stepanov451c8de2013-10-29 02:48:49 +00001205
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +00001206struct MSanInterceptorContext {
1207 bool in_interceptor_scope;
1208};
1209
Dmitry Vyukov19a13022013-10-03 15:43:59 +00001210namespace __msan {
1211
1212int OnExit() {
Dmitry Vyukovfdfb2ade2013-10-03 15:22:29 +00001213 // FIXME: ask frontend whether we need to return failure.
1214 return 0;
1215}
1216
Dmitry Vyukov19a13022013-10-03 15:43:59 +00001217} // namespace __msan
1218
Evgeniy Stepanovb69699e2013-11-11 11:28:30 +00001219// A version of CHECK_UNPOISONED using a saved scope value. Used in common
Evgeniy Stepanova343d1d2013-05-23 11:51:47 +00001220// interceptors.
Evgeniy Stepanovdec0f762013-06-28 11:02:43 +00001221#define CHECK_UNPOISONED_CTX(ctx, x, n) \
1222 do { \
1223 if (!((MSanInterceptorContext *)ctx)->in_interceptor_scope) \
1224 CHECK_UNPOISONED_0(x, n); \
1225 } while (0)
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +00001226
Sergey Matveev9be70fb2013-12-05 12:04:51 +00001227#define MSAN_INTERCEPT_FUNC(name) \
1228 do { \
1229 if ((!INTERCEPT_FUNCTION(name) || !REAL(name))) \
1230 VReport(1, "MemorySanitizer: failed to intercept '" #name "'\n"); \
Evgeniy Stepanovb69699e2013-11-11 11:28:30 +00001231 } while (0)
1232
1233#define COMMON_INTERCEPT_FUNCTION(name) MSAN_INTERCEPT_FUNC(name)
Evgeniy Stepanov72a9d252014-03-06 13:26:09 +00001234#define COMMON_INTERCEPTOR_UNPOISON_PARAM(count) \
Evgeniy Stepanovfaba61a2013-07-09 12:07:59 +00001235 UnpoisonParam(count)
Evgeniy Stepanov222076e2013-01-18 11:17:23 +00001236#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +00001237 __msan_unpoison(ptr, size)
1238#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
Evgeniy Stepanovdec0f762013-06-28 11:02:43 +00001239 CHECK_UNPOISONED_CTX(ctx, ptr, size)
Evgeniy Stepanov72a9d252014-03-06 13:26:09 +00001240#define COMMON_INTERCEPTOR_INITIALIZE_RANGE(ptr, size) \
Dmitry Vyukov83ebd022013-10-03 14:12:09 +00001241 __msan_unpoison(ptr, size)
Evgeniy Stepanov7edb87a2013-10-24 13:20:34 +00001242#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
1243 if (msan_init_is_running) return REAL(func)(__VA_ARGS__); \
1244 MSanInterceptorContext msan_ctx = {IsInInterceptorScope()}; \
1245 ctx = (void *)&msan_ctx; \
1246 (void)ctx; \
1247 InterceptorScope interceptor_scope; \
1248 __msan_unpoison(__errno_location(), sizeof(int)); /* NOLINT */ \
Evgeniy Stepanovbfd21222013-05-22 12:50:26 +00001249 ENSURE_MSAN_INITED();
1250#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
1251 do { \
Evgeniy Stepanov01671c32013-01-18 13:12:56 +00001252 } while (false)
Evgeniy Stepanov08f66282013-05-29 09:09:58 +00001253#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
1254 do { \
1255 } while (false)
1256#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \
1257 do { \
1258 } while (false)
Evgeniy Stepanov01671c32013-01-18 13:12:56 +00001259#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \
Evgeniy Stepanov08f66282013-05-29 09:09:58 +00001260 do { \
1261 } while (false) // FIXME
Dmitry Vyukov3e8432e2013-10-29 10:30:39 +00001262#define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \
1263 do { \
1264 } while (false) // FIXME
Evgeniy Stepanov64cace02013-08-12 13:19:53 +00001265#define COMMON_INTERCEPTOR_BLOCK_REAL(name) REAL(name)
Dmitry Vyukovfdfb2ade2013-10-03 15:22:29 +00001266#define COMMON_INTERCEPTOR_ON_EXIT(ctx) OnExit()
Alexey Samsonov00cd2732014-01-21 11:58:33 +00001267// FIXME: update Msan to use common printf interceptors
1268#define SANITIZER_INTERCEPT_PRINTF 0
Evgeniy Stepanova6c4a382013-01-18 13:01:18 +00001269#include "sanitizer_common/sanitizer_common_interceptors.inc"
Kostya Serebryany69fe0ba2013-01-18 06:43:13 +00001270
Evgeniy Stepanovf5523112013-04-11 14:37:04 +00001271#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s)
Alexey Samsonov786ee9b2013-09-19 08:35:16 +00001272#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) \
1273 do { \
1274 } while (false)
1275#define COMMON_SYSCALL_POST_READ_RANGE(p, s) \
1276 do { \
1277 } while (false)
Evgeniy Stepanovf5523112013-04-11 14:37:04 +00001278#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) __msan_unpoison(p, s)
1279#include "sanitizer_common/sanitizer_common_syscalls.inc"
1280
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001281// static
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001282void *fast_memset(void *ptr, int c, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001283 // hack until we have a really fast internal_memset
1284 if (sizeof(uptr) == 8 &&
1285 (n % 8) == 0 &&
1286 ((uptr)ptr % 8) == 0 &&
1287 (c == 0 || c == -1)) {
1288 // Printf("memset %p %zd %x\n", ptr, n, c);
1289 uptr to_store = c ? -1L : 0L;
1290 uptr *p = (uptr*)ptr;
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001291 for (SIZE_T i = 0; i < n / 8; i++)
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001292 p[i] = to_store;
1293 return ptr;
1294 }
1295 return internal_memset(ptr, c, n);
1296}
1297
1298// static
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001299void *fast_memcpy(void *dst, const void *src, SIZE_T n) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001300 // Same hack as in fast_memset above.
1301 if (sizeof(uptr) == 8 &&
1302 (n % 8) == 0 &&
1303 ((uptr)dst % 8) == 0 &&
1304 ((uptr)src % 8) == 0) {
1305 uptr *d = (uptr*)dst;
1306 uptr *s = (uptr*)src;
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001307 for (SIZE_T i = 0; i < n / 8; i++)
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001308 d[i] = s[i];
1309 return dst;
1310 }
1311 return internal_memcpy(dst, src, n);
1312}
1313
Evgeniy Stepanov05938a22014-02-14 11:41:26 +00001314static void PoisonShadow(uptr ptr, uptr size, u8 value) {
1315 uptr PageSize = GetPageSizeCached();
1316 uptr shadow_beg = MEM_TO_SHADOW(ptr);
1317 uptr shadow_end = MEM_TO_SHADOW(ptr + size);
1318 if (value ||
1319 shadow_end - shadow_beg < common_flags()->clear_shadow_mmap_threshold) {
1320 fast_memset((void*)shadow_beg, value, shadow_end - shadow_beg);
1321 } else {
1322 uptr page_beg = RoundUpTo(shadow_beg, PageSize);
1323 uptr page_end = RoundDownTo(shadow_end, PageSize);
1324
1325 if (page_beg >= page_end) {
1326 fast_memset((void *)shadow_beg, 0, shadow_end - shadow_beg);
1327 } else {
1328 if (page_beg != shadow_beg) {
1329 fast_memset((void *)shadow_beg, 0, page_beg - shadow_beg);
1330 }
1331 if (page_end != shadow_end) {
1332 fast_memset((void *)page_end, 0, shadow_end - page_end);
1333 }
1334 MmapFixedNoReserve(page_beg, page_end - page_beg);
1335 }
1336 }
1337}
1338
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001339// These interface functions reside here so that they can use
1340// fast_memset, etc.
Alexey Samsonov34093f02013-04-23 13:34:19 +00001341void __msan_unpoison(const void *a, uptr size) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001342 if (!MEM_IS_APP(a)) return;
Evgeniy Stepanov05938a22014-02-14 11:41:26 +00001343 PoisonShadow((uptr)a, size, 0);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001344}
1345
Alexey Samsonov34093f02013-04-23 13:34:19 +00001346void __msan_poison(const void *a, uptr size) {
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001347 if (!MEM_IS_APP(a)) return;
Evgeniy Stepanov05938a22014-02-14 11:41:26 +00001348 PoisonShadow((uptr)a, size,
1349 __msan::flags()->poison_heap_with_zeroes ? 0 : -1);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001350}
1351
1352void __msan_poison_stack(void *a, uptr size) {
1353 if (!MEM_IS_APP(a)) return;
Evgeniy Stepanov05938a22014-02-14 11:41:26 +00001354 PoisonShadow((uptr)a, size,
1355 __msan::flags()->poison_stack_with_zeroes ? 0 : -1);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001356}
1357
1358void __msan_clear_and_unpoison(void *a, uptr size) {
1359 fast_memset(a, 0, size);
Evgeniy Stepanov05938a22014-02-14 11:41:26 +00001360 PoisonShadow((uptr)a, size, 0);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001361}
1362
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001363void *__msan_memcpy(void *dest, const void *src, SIZE_T n) {
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001364 if (!msan_inited) return internal_memcpy(dest, src, n);
1365 if (msan_init_is_running) return REAL(memcpy)(dest, src, n);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001366 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001367 GET_STORE_STACK_TRACE;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001368 void *res = fast_memcpy(dest, src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001369 CopyPoison(dest, src, n, &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001370 return res;
1371}
1372
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001373void *__msan_memset(void *s, int c, SIZE_T n) {
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001374 if (!msan_inited) return internal_memset(s, c, n);
1375 if (msan_init_is_running) return REAL(memset)(s, c, n);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001376 ENSURE_MSAN_INITED();
1377 void *res = fast_memset(s, c, n);
1378 __msan_unpoison(s, n);
1379 return res;
1380}
1381
Kostya Serebryany07bb3922012-12-13 06:31:40 +00001382void *__msan_memmove(void *dest, const void *src, SIZE_T n) {
Evgeniy Stepanovf653cda2014-04-04 09:47:41 +00001383 if (!msan_inited) return internal_memmove(dest, src, n);
1384 if (msan_init_is_running) return REAL(memmove)(dest, src, n);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001385 ENSURE_MSAN_INITED();
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001386 GET_STORE_STACK_TRACE;
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001387 void *res = REAL(memmove)(dest, src, n);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001388 MovePoison(dest, src, n, &stack);
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001389 return res;
1390}
1391
Sergey Matveevfa76f3b2014-03-21 10:12:17 +00001392void __msan_unpoison_string(const char* s) {
1393 if (!MEM_IS_APP(s)) return;
1394 __msan_unpoison(s, REAL(strlen)(s) + 1);
1395}
1396
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001397namespace __msan {
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001398
Evgeniy Stepanova55fcd32014-04-02 11:06:35 +00001399u32 GetOriginIfPoisoned(uptr addr, uptr size) {
1400 unsigned char *s = (unsigned char *)MEM_TO_SHADOW(addr);
1401 for (uptr i = 0; i < size; ++i)
1402 if (s[i])
1403 return *(u32 *)SHADOW_TO_ORIGIN((s + i) & ~3UL);
1404 return 0;
1405}
1406
1407void SetOriginIfPoisoned(uptr addr, uptr src_shadow, uptr size,
1408 u32 src_origin) {
1409 uptr dst_s = MEM_TO_SHADOW(addr);
1410 uptr src_s = src_shadow;
1411 uptr src_s_end = src_s + size;
1412
1413 for (; src_s < src_s_end; ++dst_s, ++src_s)
1414 if (*(u8 *)src_s) *(u32 *)SHADOW_TO_ORIGIN(dst_s &~3UL) = src_origin;
1415}
1416
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001417void CopyOrigin(void *dst, const void *src, uptr size, StackTrace *stack) {
1418 if (!__msan_get_track_origins()) return;
1419 if (!MEM_IS_APP(dst) || !MEM_IS_APP(src)) return;
1420
1421 uptr d = (uptr)dst;
1422 uptr beg = d & ~3UL;
1423 // Copy left unaligned origin if that memory is poisoned.
1424 if (beg < d) {
Evgeniy Stepanova55fcd32014-04-02 11:06:35 +00001425 u32 o = GetOriginIfPoisoned(beg, d - beg);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001426 if (o) {
1427 if (__msan_get_track_origins() > 1) o = ChainOrigin(o, stack);
1428 *(u32 *)MEM_TO_ORIGIN(beg) = o;
1429 }
1430 beg += 4;
1431 }
1432
1433 uptr end = (d + size + 3) & ~3UL;
1434 // Copy right unaligned origin if that memory is poisoned.
1435 if (end > d + size) {
Evgeniy Stepanova55fcd32014-04-02 11:06:35 +00001436 u32 o = GetOriginIfPoisoned(d + size, end - d - size);
Evgeniy Stepanov412d9732014-03-18 13:45:19 +00001437 if (o) {
1438 if (__msan_get_track_origins() > 1) o = ChainOrigin(o, stack);
1439 *(u32 *)MEM_TO_ORIGIN(end - 4) = o;
1440 }
1441 end -= 4;
1442 }
1443
1444 if (beg < end) {
1445 // Align src up.
1446 uptr s = ((uptr)src + 3) & ~3UL;
1447 // FIXME: factor out to msan_copy_origin_aligned
1448 if (__msan_get_track_origins() > 1) {
1449 u32 *src = (u32 *)MEM_TO_ORIGIN(s);
1450 u32 *src_s = (u32 *)MEM_TO_SHADOW(s);
1451 u32 *src_end = src + (end - beg);
1452 u32 *dst = (u32 *)MEM_TO_ORIGIN(beg);
1453 u32 src_o = 0;
1454 u32 dst_o = 0;
1455 for (; src < src_end; ++src, ++src_s, ++dst) {
1456 if (!*src_s) continue;
1457 if (*src != src_o) {
1458 src_o = *src;
1459 dst_o = ChainOrigin(src_o, stack);
1460 }
1461 *dst = dst_o;
1462 }
1463 } else {
1464 fast_memcpy((void *)MEM_TO_ORIGIN(beg), (void *)MEM_TO_ORIGIN(s),
1465 end - beg);
1466 }
1467 }
1468}
1469
1470void MovePoison(void *dst, const void *src, uptr size, StackTrace *stack) {
1471 if (!MEM_IS_APP(dst)) return;
1472 if (!MEM_IS_APP(src)) return;
1473 if (src == dst) return;
1474 internal_memmove((void *)MEM_TO_SHADOW((uptr)dst),
1475 (void *)MEM_TO_SHADOW((uptr)src), size);
1476 CopyOrigin(dst, src, size, stack);
1477}
1478
1479void CopyPoison(void *dst, const void *src, uptr size, StackTrace *stack) {
1480 if (!MEM_IS_APP(dst)) return;
1481 if (!MEM_IS_APP(src)) return;
1482 fast_memcpy((void *)MEM_TO_SHADOW((uptr)dst),
1483 (void *)MEM_TO_SHADOW((uptr)src), size);
1484 CopyOrigin(dst, src, size, stack);
1485}
1486
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001487void InitializeInterceptors() {
1488 static int inited = 0;
1489 CHECK_EQ(inited, 0);
Evgeniy Stepanov7d460402014-05-07 13:24:28 +00001490 InitializeCommonInterceptors();
Kostya Serebryany69fe0ba2013-01-18 06:43:13 +00001491
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001492 INTERCEPT_FUNCTION(mmap);
1493 INTERCEPT_FUNCTION(mmap64);
1494 INTERCEPT_FUNCTION(posix_memalign);
Evgeniy Stepanove3eaa7b2013-09-02 09:24:53 +00001495 INTERCEPT_FUNCTION(memalign);
1496 INTERCEPT_FUNCTION(valloc);
1497 INTERCEPT_FUNCTION(pvalloc);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001498 INTERCEPT_FUNCTION(malloc);
1499 INTERCEPT_FUNCTION(calloc);
1500 INTERCEPT_FUNCTION(realloc);
1501 INTERCEPT_FUNCTION(free);
Evgeniy Stepanov9dcd5a32014-03-27 13:29:29 +00001502 INTERCEPT_FUNCTION(cfree);
1503 INTERCEPT_FUNCTION(malloc_usable_size);
1504 INTERCEPT_FUNCTION(mallinfo);
1505 INTERCEPT_FUNCTION(mallopt);
1506 INTERCEPT_FUNCTION(malloc_stats);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001507 INTERCEPT_FUNCTION(fread);
1508 INTERCEPT_FUNCTION(fread_unlocked);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001509 INTERCEPT_FUNCTION(readlink);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001510 INTERCEPT_FUNCTION(memcpy);
Evgeniy Stepanov365bd0c2013-11-01 23:49:48 +00001511 INTERCEPT_FUNCTION(memccpy);
Evgeniy Stepanovaa23bd82013-07-02 14:49:24 +00001512 INTERCEPT_FUNCTION(mempcpy);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001513 INTERCEPT_FUNCTION(memset);
1514 INTERCEPT_FUNCTION(memmove);
Evgeniy Stepanovdb615c12013-07-04 13:19:41 +00001515 INTERCEPT_FUNCTION(bcopy);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001516 INTERCEPT_FUNCTION(wmemset);
1517 INTERCEPT_FUNCTION(wmemcpy);
Evgeniy Stepanovaa23bd82013-07-02 14:49:24 +00001518 INTERCEPT_FUNCTION(wmempcpy);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001519 INTERCEPT_FUNCTION(wmemmove);
1520 INTERCEPT_FUNCTION(strcpy); // NOLINT
Evgeniy Stepanov654688b2013-07-01 15:19:37 +00001521 INTERCEPT_FUNCTION(stpcpy); // NOLINT
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001522 INTERCEPT_FUNCTION(strdup);
Evgeniy Stepanovead6cf72013-03-14 11:10:36 +00001523 INTERCEPT_FUNCTION(__strdup);
1524 INTERCEPT_FUNCTION(strndup);
1525 INTERCEPT_FUNCTION(__strndup);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001526 INTERCEPT_FUNCTION(strncpy); // NOLINT
1527 INTERCEPT_FUNCTION(strlen);
1528 INTERCEPT_FUNCTION(strnlen);
1529 INTERCEPT_FUNCTION(gcvt);
1530 INTERCEPT_FUNCTION(strcat); // NOLINT
1531 INTERCEPT_FUNCTION(strncat); // NOLINT
1532 INTERCEPT_FUNCTION(strtol);
1533 INTERCEPT_FUNCTION(strtoll);
1534 INTERCEPT_FUNCTION(strtoul);
1535 INTERCEPT_FUNCTION(strtoull);
Evgeniy Stepanove3a32512013-01-17 13:42:17 +00001536 INTERCEPT_FUNCTION(strtod);
Evgeniy Stepanov7aacd9c2013-10-14 11:52:40 +00001537 INTERCEPT_FUNCTION(strtod_l);
1538 INTERCEPT_FUNCTION(__strtod_l);
Evgeniy Stepanove3a32512013-01-17 13:42:17 +00001539 INTERCEPT_FUNCTION(strtof);
Evgeniy Stepanov7aacd9c2013-10-14 11:52:40 +00001540 INTERCEPT_FUNCTION(strtof_l);
1541 INTERCEPT_FUNCTION(__strtof_l);
Evgeniy Stepanove3a32512013-01-17 13:42:17 +00001542 INTERCEPT_FUNCTION(strtold);
Evgeniy Stepanov7aacd9c2013-10-14 11:52:40 +00001543 INTERCEPT_FUNCTION(strtold_l);
1544 INTERCEPT_FUNCTION(__strtold_l);
Sergey Matveev1394f2d2014-01-28 13:45:58 +00001545 INTERCEPT_FUNCTION(strtol_l);
1546 INTERCEPT_FUNCTION(strtoll_l);
1547 INTERCEPT_FUNCTION(strtoul_l);
1548 INTERCEPT_FUNCTION(strtoull_l);
Evgeniy Stepanovb58b72e2013-06-21 13:32:26 +00001549 INTERCEPT_FUNCTION(vasprintf);
1550 INTERCEPT_FUNCTION(asprintf);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001551 INTERCEPT_FUNCTION(vsprintf);
1552 INTERCEPT_FUNCTION(vsnprintf);
1553 INTERCEPT_FUNCTION(vswprintf);
1554 INTERCEPT_FUNCTION(sprintf); // NOLINT
1555 INTERCEPT_FUNCTION(snprintf);
1556 INTERCEPT_FUNCTION(swprintf);
1557 INTERCEPT_FUNCTION(strftime);
Evgeniy Stepanov9ce9a6c2014-04-14 14:59:42 +00001558 INTERCEPT_FUNCTION(strftime_l);
1559 INTERCEPT_FUNCTION(__strftime_l);
1560 INTERCEPT_FUNCTION(wcsftime);
1561 INTERCEPT_FUNCTION(wcsftime_l);
1562 INTERCEPT_FUNCTION(__wcsftime_l);
Evgeniy Stepanov165d7592013-07-02 13:34:44 +00001563 INTERCEPT_FUNCTION(mbtowc);
1564 INTERCEPT_FUNCTION(mbrtowc);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001565 INTERCEPT_FUNCTION(wcslen);
1566 INTERCEPT_FUNCTION(wcschr);
1567 INTERCEPT_FUNCTION(wcscpy);
1568 INTERCEPT_FUNCTION(wcscmp);
1569 INTERCEPT_FUNCTION(wcstod);
1570 INTERCEPT_FUNCTION(getenv);
Evgeniy Stepanov5dbedf62013-08-01 11:14:14 +00001571 INTERCEPT_FUNCTION(setenv);
1572 INTERCEPT_FUNCTION(putenv);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001573 INTERCEPT_FUNCTION(gettimeofday);
1574 INTERCEPT_FUNCTION(fcvt);
1575 INTERCEPT_FUNCTION(__fxstat);
Evgeniy Stepanov842fa3f2013-09-09 13:40:41 +00001576 INTERCEPT_FUNCTION(__fxstatat);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001577 INTERCEPT_FUNCTION(__xstat);
1578 INTERCEPT_FUNCTION(__lxstat);
1579 INTERCEPT_FUNCTION(__fxstat64);
Evgeniy Stepanov842fa3f2013-09-09 13:40:41 +00001580 INTERCEPT_FUNCTION(__fxstatat64);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001581 INTERCEPT_FUNCTION(__xstat64);
1582 INTERCEPT_FUNCTION(__lxstat64);
1583 INTERCEPT_FUNCTION(pipe);
Evgeniy Stepanovb4eac2f2013-04-08 13:45:12 +00001584 INTERCEPT_FUNCTION(pipe2);
1585 INTERCEPT_FUNCTION(socketpair);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001586 INTERCEPT_FUNCTION(fgets);
1587 INTERCEPT_FUNCTION(fgets_unlocked);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001588 INTERCEPT_FUNCTION(getrlimit);
1589 INTERCEPT_FUNCTION(getrlimit64);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001590 INTERCEPT_FUNCTION(uname);
Evgeniy Stepanovffffbef2013-01-23 10:43:38 +00001591 INTERCEPT_FUNCTION(gethostname);
Alexey Samsonovcd1e68e2012-12-14 11:52:02 +00001592 INTERCEPT_FUNCTION(epoll_wait);
1593 INTERCEPT_FUNCTION(epoll_pwait);
1594 INTERCEPT_FUNCTION(recv);
1595 INTERCEPT_FUNCTION(recvfrom);
Evgeniy Stepanove3a32512013-01-17 13:42:17 +00001596 INTERCEPT_FUNCTION(dladdr);
Evgeniy Stepanov13322c62013-10-31 16:58:44 +00001597 INTERCEPT_FUNCTION(dlerror);
Reid Klecknerc9d382b2013-03-11 18:07:42 +00001598 INTERCEPT_FUNCTION(dlopen);
Evgeniy Stepanov87c6ec72013-05-16 13:00:25 +00001599 INTERCEPT_FUNCTION(dl_iterate_phdr);
Evgeniy Stepanove3a32512013-01-17 13:42:17 +00001600 INTERCEPT_FUNCTION(getrusage);
Evgeniy Stepanovf8213b42013-04-01 14:47:21 +00001601 INTERCEPT_FUNCTION(sigaction);
Evgeniy Stepanov1f8b3532013-04-04 08:22:52 +00001602 INTERCEPT_FUNCTION(signal);
Evgeniy Stepanov98f5ea02013-03-13 09:01:40 +00001603 INTERCEPT_FUNCTION(pthread_create);
Evgeniy Stepanov628d7272013-07-05 12:31:07 +00001604 INTERCEPT_FUNCTION(pthread_key_create);
Evgeniy Stepanov807e1312013-07-30 12:54:34 +00001605 INTERCEPT_FUNCTION(pthread_join);
Evgeniy Stepanov9be91e92013-09-13 11:27:38 +00001606 INTERCEPT_FUNCTION(tzset);
Evgeniy Stepanov022235c2013-09-27 11:32:21 +00001607 INTERCEPT_FUNCTION(__cxa_atexit);
Evgeniy Stepanov451c8de2013-10-29 02:48:49 +00001608 INTERCEPT_FUNCTION(shmat);
Evgeniy Stepanov2794c472013-10-22 14:31:30 +00001609
Evgeniy Stepanovc5033782012-12-11 12:27:27 +00001610 inited = 1;
1611}
1612} // namespace __msan