sanitizer_linux.cc revision 5ce93fc96ab5e2defd85890da63b51cc4c57a2af
1ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov//===-- sanitizer_linux.cc ------------------------------------------------===// 2ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// 3ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// The LLVM Compiler Infrastructure 4ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// 5ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// This file is distributed under the University of Illinois Open Source 6ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// License. See LICENSE.TXT for details. 7ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// 8ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov//===----------------------------------------------------------------------===// 9ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// 10ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// This file is shared between AddressSanitizer and ThreadSanitizer 11ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// run-time libraries and implements linux-specific functions from 12ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov// sanitizer_libc.h. 13ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov//===----------------------------------------------------------------------===// 1424e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov 1524e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#include "sanitizer_platform.h" 1624e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if SANITIZER_LINUX 17ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 186895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov#include "sanitizer_common.h" 1994b5036ee6ba866e1702848855b6d687d1e70afaAlexey Samsonov#include "sanitizer_internal_defs.h" 20ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include "sanitizer_libc.h" 216fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany#include "sanitizer_linux.h" 2293da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko#include "sanitizer_mutex.h" 23a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov#include "sanitizer_placement_new.h" 246895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov#include "sanitizer_procmaps.h" 25a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#include "sanitizer_stacktrace.h" 265ce93fc96ab5e2defd85890da63b51cc4c57a2afAlexander Potapenko#include "sanitizer_symbolizer.h" 27ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 28088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include <asm/param.h> 29b114ed83859d8d4964ac2284584733bcd2acf4f6Evgeniy Stepanov#include <dlfcn.h> 3035a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#include <errno.h> 31c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov#include <fcntl.h> 32e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov#include <pthread.h> 330969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov#include <sched.h> 34ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <sys/mman.h> 356fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany#include <sys/ptrace.h> 36e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov#include <sys/resource.h> 37c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov#include <sys/stat.h> 38ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <sys/syscall.h> 39e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov#include <sys/time.h> 40ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <sys/types.h> 41ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <unistd.h> 42a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#include <unwind.h> 4335a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov 4424e13723f8477d8c42ab8b2a7f4f69fc089842f1Evgeniy Stepanov#if !SANITIZER_ANDROID 4535a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#include <sys/signal.h> 4635a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#endif 47fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukov 484bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov// <linux/time.h> 494bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukovstruct kernel_timeval { 504bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov long tv_sec; 514bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov long tv_usec; 524bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov}; 534bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov 54fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukov// <linux/futex.h> is broken on some linux distributions. 55fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukovconst int FUTEX_WAIT = 0; 56fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukovconst int FUTEX_WAKE = 1; 57ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 589d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany// Are we using 32-bit or 64-bit syscalls? 595af39e50366f1aacbebc284f572f08ad1ad07357Kostya Serebryany// x32 (which defines __x86_64__) has SANITIZER_WORDSIZE == 32 6008bfe4988de493dd3e61d02759b3f19c42f8fb78Kostya Serebryany// but it still needs to use 64-bit syscalls. 615af39e50366f1aacbebc284f572f08ad1ad07357Kostya Serebryany#if defined(__x86_64__) || SANITIZER_WORDSIZE == 64 629d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany# define SANITIZER_LINUX_USES_64BIT_SYSCALLS 1 639d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#else 649d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany# define SANITIZER_LINUX_USES_64BIT_SYSCALLS 0 659d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#endif 669d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany 67ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonovnamespace __sanitizer { 68ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 699578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne#ifdef __x86_64__ 709578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne#include "sanitizer_syscall_linux_x86_64.inc" 719578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne#else 729578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne#include "sanitizer_syscall_generic.inc" 739578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne#endif 749578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne 75e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov// --------------- sanitizer_libc.h 769578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_mmap(void *addr, uptr length, int prot, int flags, 77ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov int fd, u64 offset) { 789d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 799578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_mmap, addr, length, prot, flags, fd, offset); 80ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#else 819578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_mmap2, addr, length, prot, flags, fd, offset); 82ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#endif 83ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov} 84ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 859578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_munmap(void *addr, uptr length) { 869578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_munmap, addr, length); 871f11d31faa5ed89b74f7d543b1182fe8de198be5Alexey Samsonov} 881f11d31faa5ed89b74f7d543b1182fe8de198be5Alexey Samsonov 899578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_close(fd_t fd) { 909578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_close, fd); 91a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov} 92a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov 939578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_open(const char *filename, int flags) { 949578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_open, filename, flags); 95ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov} 96ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov 979578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_open(const char *filename, int flags, u32 mode) { 989578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_open, filename, flags, mode); 99ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov} 100ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov 1019578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr OpenFile(const char *filename, bool write) { 102ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov return internal_open(filename, 1039b8a9c1b1ce4659457178ff4c0838ac1b35ca9dcKostya Serebryany write ? O_WRONLY | O_CREAT /*| O_CLOEXEC*/ : O_RDONLY, 0660); 104c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov} 105c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov 106a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonovuptr internal_read(fd_t fd, void *buf, uptr count) { 1073334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov sptr res; 1089578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne HANDLE_EINTR(res, (sptr)internal_syscall(__NR_read, fd, buf, count)); 1093334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov return res; 110a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov} 111a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov 112a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonovuptr internal_write(fd_t fd, const void *buf, uptr count) { 1133334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov sptr res; 1149578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne HANDLE_EINTR(res, (sptr)internal_syscall(__NR_write, fd, buf, count)); 1153334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov return res; 116a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov} 117a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov 1182be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov#if !SANITIZER_LINUX_USES_64BIT_SYSCALLS 1192be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanovstatic void stat64_to_stat(struct stat64 *in, struct stat *out) { 1202be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov internal_memset(out, 0, sizeof(*out)); 1212be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_dev = in->st_dev; 1222be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_ino = in->st_ino; 1232be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_mode = in->st_mode; 1242be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_nlink = in->st_nlink; 1252be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_uid = in->st_uid; 1262be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_gid = in->st_gid; 1272be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_rdev = in->st_rdev; 1282be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_size = in->st_size; 1292be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_blksize = in->st_blksize; 1302be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_blocks = in->st_blocks; 1312be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_atime = in->st_atime; 1322be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_mtime = in->st_mtime; 1332be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_ctime = in->st_ctime; 1342be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov out->st_ino = in->st_ino; 1352be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov} 1362be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov#endif 1372be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov 1389578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_stat(const char *path, void *buf) { 1394c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 1409578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_stat, path, buf); 1414c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#else 1422be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov struct stat64 buf64; 1439578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne int res = internal_syscall(__NR_stat64, path, &buf64); 1442be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov stat64_to_stat(&buf64, (struct stat *)buf); 1452be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov return res; 1464c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#endif 1474c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov} 1484c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov 1499578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_lstat(const char *path, void *buf) { 1504c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 1519578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_lstat, path, buf); 1524c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#else 1532be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov struct stat64 buf64; 1549578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne int res = internal_syscall(__NR_lstat64, path, &buf64); 1552be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov stat64_to_stat(&buf64, (struct stat *)buf); 1562be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov return res; 1574c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#endif 1584c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov} 1594c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov 1609578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_fstat(fd_t fd, void *buf) { 1614c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 1629578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_fstat, fd, buf); 1634c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#else 1642be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov struct stat64 buf64; 1659578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne int res = internal_syscall(__NR_fstat64, fd, &buf64); 1662be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov stat64_to_stat(&buf64, (struct stat *)buf); 1672be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov return res; 1684c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#endif 1694c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov} 1704c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov 1718e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonovuptr internal_filesize(fd_t fd) { 172a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov struct stat st; 1734c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov if (internal_fstat(fd, &st)) 1744c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return -1; 1758e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov return (uptr)st.st_size; 1768e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov} 1778e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov 1789578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_dup2(int oldfd, int newfd) { 1799578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_dup2, oldfd, newfd); 1808e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov} 1818e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov 182d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonovuptr internal_readlink(const char *path, char *buf, uptr bufsize) { 1839578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_readlink, path, buf, bufsize); 184d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonov} 185d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonov 1869578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_unlink(const char *path) { 1879578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_unlink, path); 1886d6ab9eeea4a99370d7ab18ce80eb96091e2cf3fDmitry Vyukov} 1896d6ab9eeea4a99370d7ab18ce80eb96091e2cf3fDmitry Vyukov 1909578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_sched_yield() { 1919578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_sched_yield); 1920969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov} 1930969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov 194f882247088952deed954a19d745c2dd8871e2035Alexey Samsonovvoid internal__exit(int exitcode) { 1959578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne internal_syscall(__NR_exit_group, exitcode); 196f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov Die(); // Unreachable. 197f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov} 198f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov 1999578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_execve(const char *filename, char *const argv[], 2009578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne char *const envp[]) { 2019578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_execve, filename, argv, envp); 2029578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne} 2039578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne 204e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov// ----------------- sanitizer_common.h 20593b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonovbool FileExists(const char *filename) { 20693b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov struct stat st; 2072be3a283939d4fc14ad86f6cd8be34b1468f22baEvgeniy Stepanov if (internal_stat(filename, &st)) 20893b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov return false; 20993b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov // Sanity check: filename is a regular file. 21093b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov return S_ISREG(st.st_mode); 21193b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov} 21293b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov 213e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukovuptr GetTid() { 2149578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_gettid); 215e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukov} 216e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukov 2174bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukovu64 NanoTime() { 2184bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov kernel_timeval tv; 2199578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne internal_syscall(__NR_gettimeofday, &tv, 0); 2204bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov return (u64)tv.tv_sec * 1000*1000*1000 + tv.tv_usec * 1000; 2214bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov} 2224bebe7bab966c82f0a8952f797ed3d490624dc62Dmitry Vyukov 2233dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov// Like getenv, but reads env directly from /proc and does not use libc. 2243dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov// This function should be called first inside __asan_init. 2253dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonovconst char *GetEnv(const char *name) { 2263dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov static char *environ; 2273dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov static uptr len; 2283dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov static bool inited; 2293dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov if (!inited) { 2303dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov inited = true; 2313dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov uptr environ_size; 2323dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov len = ReadFileToBuffer("/proc/self/environ", 2333dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov &environ, &environ_size, 1 << 26); 2343dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov } 2353dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov if (!environ || len == 0) return 0; 2363dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov uptr namelen = internal_strlen(name); 2373dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov const char *p = environ; 2383dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov while (*p != '\0') { // will happen at the \0\0 that terminates the buffer 2393dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov // proc file has the format NAME=value\0NAME=value\0NAME=value\0... 2403dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov const char* endp = 2413dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov (char*)internal_memchr(p, '\0', len - (p - environ)); 2423dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov if (endp == 0) // this entry isn't NUL terminated 2433dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov return 0; 2443dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov else if (!internal_memcmp(p, name, namelen) && p[namelen] == '=') // Match. 2453dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov return p + namelen + 1; // point after = 2463dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov p = endp + 1; 2473dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov } 2483dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov return 0; // Not found. 2493dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov} 2503dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov 251eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanovextern "C" { 25226337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne extern void *__libc_stack_end SANITIZER_WEAK_ATTRIBUTE; 253eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov} 254eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 25526337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne#if !SANITIZER_GO 25623709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbournestatic void ReadNullSepFileToArray(const char *path, char ***arr, 25723709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne int arr_size) { 25823709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne char *buff; 259d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov uptr buff_size = 0; 26023709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne *arr = (char **)MmapOrDie(arr_size * sizeof(char *), "NullSepFileArray"); 26123709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne ReadFileToBuffer(path, &buff, &buff_size, 1024 * 1024); 26223709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne (*arr)[0] = buff; 26323709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne int count, i; 26423709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne for (count = 1, i = 1; ; i++) { 265d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov if (buff[i] == 0) { 266d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov if (buff[i+1] == 0) break; 26723709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne (*arr)[count] = &buff[i+1]; 26823709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne CHECK_LE(count, arr_size - 1); // FIXME: make this more flexible. 26923709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne count++; 270d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov } 271d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov } 27223709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne (*arr)[count] = 0; 27323709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne} 27426337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne#endif 27523709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne 27626337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbournestatic void GetArgsAndEnv(char*** argv, char*** envp) { 27726337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne#if !SANITIZER_GO 27826337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne if (&__libc_stack_end) { 27926337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne#endif 28026337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne uptr* stack_end = (uptr*)__libc_stack_end; 28126337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne int argc = *stack_end; 28226337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne *argv = (char**)(stack_end + 1); 28326337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne *envp = (char**)(stack_end + argc + 2); 28426337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne#if !SANITIZER_GO 28526337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne } else { 28626337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne static const int kMaxArgv = 2000, kMaxEnvp = 2000; 28726337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne ReadNullSepFileToArray("/proc/self/cmdline", argv, kMaxArgv); 28826337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne ReadNullSepFileToArray("/proc/self/environ", envp, kMaxEnvp); 28926337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne } 29026337b60b1d551c4744454edd8e5ef3c479e3467Peter Collingbourne#endif 291eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov} 292eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 293eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanovvoid ReExec() { 29423709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne char **argv, **envp; 295eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov GetArgsAndEnv(&argv, &envp); 2969578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne uptr rv = internal_execve("/proc/self/exe", argv, envp); 2979578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne int rverrno; 2989578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne CHECK_EQ(internal_iserror(rv, &rverrno), true); 2999578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne Printf("execve failed, errno %d\n", rverrno); 300f35eae83757946decb312deab3f0fe155fe5d580Evgeniy Stepanov Die(); 301d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov} 302d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov 30325742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenkovoid PrepareForSandboxing() { 30425742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // Some kinds of sandboxes may forbid filesystem access, so we won't be able 30525742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // to read the file mappings from /proc/self/maps. Luckily, neither the 30625742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // process will be able to load additional libraries, so it's fine to use the 30725742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // cached mappings. 30825742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko MemoryMappingLayout::CacheMemoryMappings(); 3095ce93fc96ab5e2defd85890da63b51cc4c57a2afAlexander Potapenko // Same for /proc/self/exe in the symbolizer. 3105ce93fc96ab5e2defd85890da63b51cc4c57a2afAlexander Potapenko SymbolizerPrepareForSandboxing(); 31125742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko} 31225742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko 313e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov// ----------------- sanitizer_procmaps.h 314286dd3f8afe6700e5dd9b0bdb7afd23121c98c12Dmitry Vyukov// Linker initialized. 315286dd3f8afe6700e5dd9b0bdb7afd23121c98c12Dmitry VyukovProcSelfMapsBuff MemoryMappingLayout::cached_proc_self_maps_; 316ad91267d45fef531c1082ab7974e4cc78aba5280Alexander PotapenkoStaticSpinMutex MemoryMappingLayout::cache_lock_; // Linker initialized. 31793da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko 3189ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander PotapenkoMemoryMappingLayout::MemoryMappingLayout(bool cache_enabled) { 319ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko proc_self_maps_.len = 320ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko ReadFileToBuffer("/proc/self/maps", &proc_self_maps_.data, 321ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko &proc_self_maps_.mmaped_size, 1 << 26); 3229ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko if (cache_enabled) { 3239ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko if (proc_self_maps_.mmaped_size == 0) { 3249ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko LoadFromCache(); 3259ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko CHECK_GT(proc_self_maps_.len, 0); 3269ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko } 3279ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko } else { 3289ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko CHECK_GT(proc_self_maps_.mmaped_size, 0); 32993da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 3306895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov Reset(); 33193da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko // FIXME: in the future we may want to cache the mappings on demand only. 3329ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko if (cache_enabled) 3339ae2883d88dd28b9c5dc862107e6e6d12a35926eAlexander Potapenko CacheMemoryMappings(); 3346895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 3356895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 336e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey SamsonovMemoryMappingLayout::~MemoryMappingLayout() { 3377385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko // Only unmap the buffer if it is different from the cached one. Otherwise 3387385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko // it will be unmapped when the cache is refreshed. 3397385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko if (proc_self_maps_.data != cached_proc_self_maps_.data) { 3407385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko UnmapOrDie(proc_self_maps_.data, proc_self_maps_.mmaped_size); 3417385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko } 3426895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 3436895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 344e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonovvoid MemoryMappingLayout::Reset() { 345ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko current_ = proc_self_maps_.data; 3466895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 3476895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 34893da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko// static 34993da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenkovoid MemoryMappingLayout::CacheMemoryMappings() { 35093da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko SpinMutexLock l(&cache_lock_); 35193da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko // Don't invalidate the cache if the mappings are unavailable. 352ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko ProcSelfMapsBuff old_proc_self_maps; 353ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko old_proc_self_maps = cached_proc_self_maps_; 354ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko cached_proc_self_maps_.len = 355ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko ReadFileToBuffer("/proc/self/maps", &cached_proc_self_maps_.data, 356ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko &cached_proc_self_maps_.mmaped_size, 1 << 26); 357ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (cached_proc_self_maps_.mmaped_size == 0) { 358ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko cached_proc_self_maps_ = old_proc_self_maps; 35993da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } else { 360ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (old_proc_self_maps.mmaped_size) { 361ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko UnmapOrDie(old_proc_self_maps.data, 362ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko old_proc_self_maps.mmaped_size); 36393da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 36493da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 36593da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko} 36693da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko 36793da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenkovoid MemoryMappingLayout::LoadFromCache() { 36893da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko SpinMutexLock l(&cache_lock_); 369ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (cached_proc_self_maps_.data) { 370286dd3f8afe6700e5dd9b0bdb7afd23121c98c12Dmitry Vyukov proc_self_maps_ = cached_proc_self_maps_; 37193da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 37293da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko} 37393da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko 374a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany// Parse a hex value in str and update str. 375a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryanystatic uptr ParseHex(char **str) { 376a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany uptr x = 0; 377a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany char *s; 378a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany for (s = *str; ; s++) { 379a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany char c = *s; 380a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany uptr v = 0; 381a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany if (c >= '0' && c <= '9') 382a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany v = c - '0'; 383a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany else if (c >= 'a' && c <= 'f') 384a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany v = c - 'a' + 10; 385a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany else if (c >= 'A' && c <= 'F') 386a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany v = c - 'A' + 10; 387a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany else 388a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany break; 389a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany x = x * 16 + v; 390a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany } 391a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *str = s; 392a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany return x; 393a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany} 394a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany 395ab11e0b10d077945a6e681766b41e12ac6aeb0f0Alexey Samsonovstatic bool IsOneOf(char c, char c1, char c2) { 396a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany return c == c1 || c == c2; 397a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany} 398a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany 399a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryanystatic bool IsDecimal(char c) { 400a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany return c >= '0' && c <= '9'; 401a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany} 402a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany 403e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonovbool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset, 40445717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov char filename[], uptr filename_size, 40545717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov uptr *protection) { 406ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko char *last = proc_self_maps_.data + proc_self_maps_.len; 4076895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (current_ >= last) return false; 4086895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov uptr dummy; 4096895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (!start) start = &dummy; 4106895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (!end) end = &dummy; 4116895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (!offset) offset = &dummy; 4126895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov char *next_line = (char*)internal_memchr(current_, '\n', last - current_); 4136895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (next_line == 0) 4146895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov next_line = last; 415a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany // Example: 08048000-08056000 r-xp 00000000 03:0c 64593 /foo/bar 416a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *start = ParseHex(¤t_); 417bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, '-'); 418a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *end = ParseHex(¤t_); 419bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 42045717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov uptr local_protection = 0; 421ab11e0b10d077945a6e681766b41e12ac6aeb0f0Alexey Samsonov CHECK(IsOneOf(*current_, '-', 'r')); 42245717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov if (*current_++ == 'r') 42345717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov local_protection |= kProtectionRead; 424ab11e0b10d077945a6e681766b41e12ac6aeb0f0Alexey Samsonov CHECK(IsOneOf(*current_, '-', 'w')); 42545717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov if (*current_++ == 'w') 42645717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov local_protection |= kProtectionWrite; 427ab11e0b10d077945a6e681766b41e12ac6aeb0f0Alexey Samsonov CHECK(IsOneOf(*current_, '-', 'x')); 42845717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov if (*current_++ == 'x') 42945717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov local_protection |= kProtectionExecute; 430ab11e0b10d077945a6e681766b41e12ac6aeb0f0Alexey Samsonov CHECK(IsOneOf(*current_, 's', 'p')); 43145717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov if (*current_++ == 's') 43245717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov local_protection |= kProtectionShared; 43345717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov if (protection) { 43445717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov *protection = local_protection; 43545717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov } 436bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 437a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *offset = ParseHex(¤t_); 438bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 439a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany ParseHex(¤t_); 440bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ':'); 441a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany ParseHex(¤t_); 442bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 443a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany while (IsDecimal(*current_)) 444a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany current_++; 445bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 4466895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov // Skip spaces. 4476895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov while (current_ < next_line && *current_ == ' ') 4486895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov current_++; 4496895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov // Fill in the filename. 4506895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov uptr i = 0; 4516895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov while (current_ < next_line) { 4526895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (filename && i < filename_size - 1) 4536895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov filename[i++] = *current_; 4546895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov current_++; 4556895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov } 4566895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (filename && i < filename_size) 4576895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov filename[i] = 0; 4586895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov current_ = next_line + 1; 4596895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov return true; 4606895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 4616895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 462e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov// Gets the object name and the offset by walking MemoryMappingLayout. 463e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonovbool MemoryMappingLayout::GetObjectNameAndOffset(uptr addr, uptr *offset, 464e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov char filename[], 46545717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov uptr filename_size, 46645717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov uptr *protection) { 46745717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov return IterateForObjectNameAndOffset(addr, offset, filename, filename_size, 46845717c9d5e39a434749ae10509111f9df1b2cdf4Alexey Samsonov protection); 4696895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 4706895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 471f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukovenum MutexState { 472f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov MtxUnlocked = 0, 473f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov MtxLocked = 1, 474f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov MtxSleeping = 2 475f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov}; 476f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 477f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry VyukovBlockingMutex::BlockingMutex(LinkerInitialized) { 478d164ed175a61529589938b3db3cab076a19acf67Dmitry Vyukov CHECK_EQ(owner_, 0); 479f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov} 480f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 48193af5948d3e0c5bdc396f432dd0ae782f499c449Alexey SamsonovBlockingMutex::BlockingMutex() { 48293af5948d3e0c5bdc396f432dd0ae782f499c449Alexey Samsonov internal_memset(this, 0, sizeof(*this)); 48393af5948d3e0c5bdc396f432dd0ae782f499c449Alexey Samsonov} 48493af5948d3e0c5bdc396f432dd0ae782f499c449Alexey Samsonov 485f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukovvoid BlockingMutex::Lock() { 486f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); 487f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov if (atomic_exchange(m, MtxLocked, memory_order_acquire) == MtxUnlocked) 488f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov return; 489f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov while (atomic_exchange(m, MtxSleeping, memory_order_acquire) != MtxUnlocked) 4909578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne internal_syscall(__NR_futex, m, FUTEX_WAIT, MtxSleeping, 0, 0, 0); 491f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov} 492f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 493f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukovvoid BlockingMutex::Unlock() { 494f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); 495f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov u32 v = atomic_exchange(m, MtxUnlocked, memory_order_relaxed); 49648526014de78e21f7ed027a60670016bc7f5d292Dmitry Vyukov CHECK_NE(v, MtxUnlocked); 497f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov if (v == MtxSleeping) 4989578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne internal_syscall(__NR_futex, m, FUTEX_WAKE, 1, 0, 0, 0); 499f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov} 500f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 501ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonovvoid BlockingMutex::CheckLocked() { 502ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); 503ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov CHECK_NE(MtxUnlocked, atomic_load(m, memory_order_relaxed)); 504ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov} 505ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov 5066fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// ----------------- sanitizer_linux.h 5076fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// The actual size of this structure is specified by d_reclen. 5086fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// Note that getdents64 uses a different structure format. We only provide the 5096fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// 32-bit syscall here. 5106fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanystruct linux_dirent { 5116fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany unsigned long d_ino; 5126fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany unsigned long d_off; 5136fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany unsigned short d_reclen; 5146fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany char d_name[256]; 5156fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany}; 5166fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5176fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// Syscall wrappers. 5189578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_ptrace(int request, int pid, void *addr, void *data) { 5199578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_ptrace, request, pid, addr, data); 5209578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne} 5219578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne 5229578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_waitpid(int pid, int *status, int options) { 5239578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_wait4, pid, status, options, 0 /* rusage */); 5246fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5256fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5269578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_getpid() { 5279578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_getpid); 5286fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5296fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5309578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_getppid() { 5319578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_getppid); 5326fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5336fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5349578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count) { 5359578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_getdents, fd, dirp, count); 5366fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5376fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5389578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_lseek(fd_t fd, OFF_T offset, int whence) { 5399578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_lseek, fd, offset, whence); 5406fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5416fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5429578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5) { 5439578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_prctl, option, arg2, arg3, arg4, arg5); 5446fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5456fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5469578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourneuptr internal_sigaltstack(const struct sigaltstack *ss, 5476fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany struct sigaltstack *oss) { 5489578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne return internal_syscall(__NR_sigaltstack, ss, oss); 5496fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5506fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5516fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// ThreadLister implementation. 5526fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya SerebryanyThreadLister::ThreadLister(int pid) 5536fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany : pid_(pid), 5546fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany descriptor_(-1), 55510f3ab775088bec69dd9e7b611f9b4e152f629bcAlexey Samsonov buffer_(4096), 5566fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_(true), 55710f3ab775088bec69dd9e7b611f9b4e152f629bcAlexey Samsonov entry_((struct linux_dirent *)buffer_.data()), 5586fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany bytes_read_(0) { 5596fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany char task_directory_path[80]; 5606fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany internal_snprintf(task_directory_path, sizeof(task_directory_path), 5616fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany "/proc/%d/task/", pid); 5629578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne uptr openrv = internal_open(task_directory_path, O_RDONLY | O_DIRECTORY); 5639578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne if (internal_iserror(openrv)) { 5646fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_ = true; 5656fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany Report("Can't open /proc/%d/task for reading.\n", pid); 5666fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } else { 5676fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_ = false; 5689578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne descriptor_ = openrv; 5696fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } 5706fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5716fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5726fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint ThreadLister::GetNextTID() { 5736fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany int tid = -1; 5746fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany do { 5756fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (error_) 5766fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return -1; 5776fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if ((char *)entry_ >= &buffer_[bytes_read_] && !GetDirectoryEntries()) 5786fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return -1; 5796fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (entry_->d_ino != 0 && entry_->d_name[0] >= '0' && 5806fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany entry_->d_name[0] <= '9') { 5816fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany // Found a valid tid. 5826fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany tid = (int)internal_atoll(entry_->d_name); 5836fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } 5846fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany entry_ = (struct linux_dirent *)(((char *)entry_) + entry_->d_reclen); 5856fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } while (tid < 0); 5866fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return tid; 5876fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5886fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5896fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyvoid ThreadLister::Reset() { 5906fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (error_ || descriptor_ < 0) 5916fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return; 5926fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany internal_lseek(descriptor_, 0, SEEK_SET); 5936fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5946fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5956fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya SerebryanyThreadLister::~ThreadLister() { 5966fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (descriptor_ >= 0) 5976fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany internal_close(descriptor_); 5986fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5996fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6006fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanybool ThreadLister::error() { return error_; } 6016fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6026fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanybool ThreadLister::GetDirectoryEntries() { 6036fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany CHECK_GE(descriptor_, 0); 6046fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany CHECK_NE(error_, true); 6056fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany bytes_read_ = internal_getdents(descriptor_, 60610f3ab775088bec69dd9e7b611f9b4e152f629bcAlexey Samsonov (struct linux_dirent *)buffer_.data(), 60710f3ab775088bec69dd9e7b611f9b4e152f629bcAlexey Samsonov buffer_.size()); 6089578a3ecfc35a264ede1135033398e2a77a6cad6Peter Collingbourne if (internal_iserror(bytes_read_)) { 6096fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany Report("Can't read directory entries from /proc/%d/task.\n", pid_); 6106fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_ = true; 6116fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return false; 6126fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } else if (bytes_read_ == 0) { 6136fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return false; 6146fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } 61510f3ab775088bec69dd9e7b611f9b4e152f629bcAlexey Samsonov entry_ = (struct linux_dirent *)buffer_.data(); 6166fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return true; 6176fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 6186fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6194df343a31cf57c309cf102b9aef870458318f579Peter Collingbourneuptr GetPageSize() { 620a8bc34e420d27c47560b0742cec295e40b0f430eKostya Serebryany#if defined(__x86_64__) || defined(__i386__) 6214df343a31cf57c309cf102b9aef870458318f579Peter Collingbourne return EXEC_PAGESIZE; 622a8bc34e420d27c47560b0742cec295e40b0f430eKostya Serebryany#else 623a8bc34e420d27c47560b0742cec295e40b0f430eKostya Serebryany return sysconf(_SC_PAGESIZE); // EXEC_PAGESIZE may not be trustworthy. 624a8bc34e420d27c47560b0742cec295e40b0f430eKostya Serebryany#endif 6254df343a31cf57c309cf102b9aef870458318f579Peter Collingbourne} 6264df343a31cf57c309cf102b9aef870458318f579Peter Collingbourne 6273de0086409d143a612a54a7a0ed809e286656188Sergey Matveev// Match full names of the form /path/to/base_name{-,.}* 6283de0086409d143a612a54a7a0ed809e286656188Sergey Matveevbool LibraryNameIs(const char *full_name, const char *base_name) { 6293de0086409d143a612a54a7a0ed809e286656188Sergey Matveev const char *name = full_name; 6303de0086409d143a612a54a7a0ed809e286656188Sergey Matveev // Strip path. 6313de0086409d143a612a54a7a0ed809e286656188Sergey Matveev while (*name != '\0') name++; 6323de0086409d143a612a54a7a0ed809e286656188Sergey Matveev while (name > full_name && *name != '/') name--; 6333de0086409d143a612a54a7a0ed809e286656188Sergey Matveev if (*name == '/') name++; 6343de0086409d143a612a54a7a0ed809e286656188Sergey Matveev uptr base_name_length = internal_strlen(base_name); 6353de0086409d143a612a54a7a0ed809e286656188Sergey Matveev if (internal_strncmp(name, base_name, base_name_length)) return false; 6363de0086409d143a612a54a7a0ed809e286656188Sergey Matveev return (name[base_name_length] == '-' || name[base_name_length] == '.'); 6373de0086409d143a612a54a7a0ed809e286656188Sergey Matveev} 6383de0086409d143a612a54a7a0ed809e286656188Sergey Matveev 639ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov} // namespace __sanitizer 640ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 64146f9395baf65e17f1a3f7a3a1deee72a1560ac53Alexey Samsonov#endif // SANITIZER_LINUX 642