sanitizer_linux.cc revision ce700979f644c790c2d9d80f5cc2a1ada0380284
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//===----------------------------------------------------------------------===// 14ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#ifdef __linux__ 15ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 166895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov#include "sanitizer_common.h" 1794b5036ee6ba866e1702848855b6d687d1e70afaAlexey Samsonov#include "sanitizer_internal_defs.h" 18ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include "sanitizer_libc.h" 196fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany#include "sanitizer_linux.h" 2093da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko#include "sanitizer_mutex.h" 21a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov#include "sanitizer_placement_new.h" 226895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov#include "sanitizer_procmaps.h" 23a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#include "sanitizer_stacktrace.h" 24ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 2535a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#include <errno.h> 26c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov#include <fcntl.h> 27e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov#include <pthread.h> 280969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov#include <sched.h> 29ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <sys/mman.h> 306fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany#include <sys/ptrace.h> 31e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov#include <sys/resource.h> 32c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov#include <sys/stat.h> 33ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <sys/syscall.h> 34e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov#include <sys/time.h> 35ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <sys/types.h> 36fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukov#include <sys/prctl.h> 37ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#include <unistd.h> 38a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#include <unwind.h> 3935a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov 4035a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#if !defined(__ANDROID__) && !defined(ANDROID) 4135a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#include <sys/signal.h> 4235a7faf1fbfac678136e79d53824672dafb7d13eAlexey Samsonov#endif 43fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukov 44fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukov// <linux/futex.h> is broken on some linux distributions. 45fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukovconst int FUTEX_WAIT = 0; 46fa5c41eddf77a3614da0f62044ebf741d86aeab7Dmitry Vyukovconst int FUTEX_WAKE = 1; 47ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 489d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany// Are we using 32-bit or 64-bit syscalls? 495af39e50366f1aacbebc284f572f08ad1ad07357Kostya Serebryany// x32 (which defines __x86_64__) has SANITIZER_WORDSIZE == 32 5008bfe4988de493dd3e61d02759b3f19c42f8fb78Kostya Serebryany// but it still needs to use 64-bit syscalls. 515af39e50366f1aacbebc284f572f08ad1ad07357Kostya Serebryany#if defined(__x86_64__) || SANITIZER_WORDSIZE == 64 529d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany# define SANITIZER_LINUX_USES_64BIT_SYSCALLS 1 539d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#else 549d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany# define SANITIZER_LINUX_USES_64BIT_SYSCALLS 0 559d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#endif 569d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany 57ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonovnamespace __sanitizer { 58ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 59e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov// --------------- sanitizer_libc.h 60ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonovvoid *internal_mmap(void *addr, uptr length, int prot, int flags, 61ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov int fd, u64 offset) { 629d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 63ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov return (void *)syscall(__NR_mmap, addr, length, prot, flags, fd, offset); 64ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#else 65ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov return (void *)syscall(__NR_mmap2, addr, length, prot, flags, fd, offset); 66ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#endif 67ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov} 68ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 691f11d31faa5ed89b74f7d543b1182fe8de198be5Alexey Samsonovint internal_munmap(void *addr, uptr length) { 701f11d31faa5ed89b74f7d543b1182fe8de198be5Alexey Samsonov return syscall(__NR_munmap, addr, length); 711f11d31faa5ed89b74f7d543b1182fe8de198be5Alexey Samsonov} 721f11d31faa5ed89b74f7d543b1182fe8de198be5Alexey Samsonov 73a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonovint internal_close(fd_t fd) { 74a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov return syscall(__NR_close, fd); 75a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov} 76a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov 77ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonovfd_t internal_open(const char *filename, int flags) { 78ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov return syscall(__NR_open, filename, flags); 79ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov} 80ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov 81e85c83dcee3d35068e6670ab32545953d4330335Alexey Samsonovfd_t internal_open(const char *filename, int flags, u32 mode) { 82ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov return syscall(__NR_open, filename, flags, mode); 83ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov} 84ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov 85ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonovfd_t OpenFile(const char *filename, bool write) { 86ee7cc4454421a176d23442382afd9a01d36e7ad4Alexey Samsonov return internal_open(filename, 879b8a9c1b1ce4659457178ff4c0838ac1b35ca9dcKostya Serebryany write ? O_WRONLY | O_CREAT /*| O_CLOEXEC*/ : O_RDONLY, 0660); 88c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov} 89c5d465136b911bf925f2a631e2b79f1c03e8a1b0Alexey Samsonov 90a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonovuptr internal_read(fd_t fd, void *buf, uptr count) { 913334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov sptr res; 923334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov HANDLE_EINTR(res, (sptr)syscall(__NR_read, fd, buf, count)); 933334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov return res; 94a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov} 95a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov 96a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonovuptr internal_write(fd_t fd, const void *buf, uptr count) { 973334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov sptr res; 983334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov HANDLE_EINTR(res, (sptr)syscall(__NR_write, fd, buf, count)); 993334e12d33261cb8f211f2f49f28ddfa027a40c3Evgeniy Stepanov return res; 100a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov} 101a56aefd2e01940fcf88d1426f9de3d5e4b1ee203Alexey Samsonov 1024c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonovint internal_stat(const char *path, void *buf) { 1034c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 1044c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return syscall(__NR_stat, path, buf); 1054c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#else 1064c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return syscall(__NR_stat64, path, buf); 1074c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#endif 1084c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov} 1094c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov 1104c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonovint internal_lstat(const char *path, void *buf) { 1114c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 1124c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return syscall(__NR_lstat, path, buf); 1134c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#else 1144c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return syscall(__NR_lstat64, path, buf); 1154c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#endif 1164c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov} 1174c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov 1184c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonovint internal_fstat(fd_t fd, void *buf) { 1194c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 1204c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return syscall(__NR_fstat, fd, buf); 1214c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#else 1224c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return syscall(__NR_fstat64, fd, buf); 1234c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov#endif 1244c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov} 1254c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov 1268e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonovuptr internal_filesize(fd_t fd) { 1279d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 128a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov struct stat st; 129a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov#else 130a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov struct stat64 st; 131a68633fb76208137ccb807914df52758ee5ca6f0Alexey Samsonov#endif 1324c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov if (internal_fstat(fd, &st)) 1334c9317a7b61e136f832d2ede70f557963fd46bceAlexey Samsonov return -1; 1348e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov return (uptr)st.st_size; 1358e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov} 1368e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov 1378e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonovint internal_dup2(int oldfd, int newfd) { 1388e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov return syscall(__NR_dup2, oldfd, newfd); 1398e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov} 1408e820fcf7aafeb8101322182d742fcf99255d972Alexey Samsonov 141d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonovuptr internal_readlink(const char *path, char *buf, uptr bufsize) { 142d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonov return (uptr)syscall(__NR_readlink, path, buf, bufsize); 143d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonov} 144d1b8f588d6b712b6ff2b3d58c73d71614f520122Alexey Samsonov 1450969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonovint internal_sched_yield() { 1460969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov return syscall(__NR_sched_yield); 1470969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov} 1480969bcf2c936126b1f6e636b978aade8fc207437Alexey Samsonov 149f882247088952deed954a19d745c2dd8871e2035Alexey Samsonovvoid internal__exit(int exitcode) { 150f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov syscall(__NR_exit_group, exitcode); 151f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov Die(); // Unreachable. 152f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov} 153f882247088952deed954a19d745c2dd8871e2035Alexey Samsonov 154e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov// ----------------- sanitizer_common.h 15593b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonovbool FileExists(const char *filename) { 1569d0dbbaf33e5c2fe280f141e30be497d62b703a8Kostya Serebryany#if SANITIZER_LINUX_USES_64BIT_SYSCALLS 15793b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov struct stat st; 15893b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov if (syscall(__NR_stat, filename, &st)) 15993b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov return false; 16093b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov#else 16193b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov struct stat64 st; 16293b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov if (syscall(__NR_stat64, filename, &st)) 16393b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov return false; 16493b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov#endif 16593b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov // Sanity check: filename is a regular file. 16693b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov return S_ISREG(st.st_mode); 16793b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov} 16893b4cafd631b661b4b612ccdc0938f7f1e1c86d6Alexey Samsonov 169e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukovuptr GetTid() { 170e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukov return syscall(__NR_gettid); 171e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukov} 172e0023f74ea88efee329f68391b70f8adc6b21617Dmitry Vyukov 173ed996f79710f532bf231537e44d5c8c9c9d57e8dAlexey Samsonovvoid GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, 174e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov uptr *stack_bottom) { 175e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov static const uptr kMaxThreadStackSize = 256 * (1 << 20); // 256M 176e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov CHECK(stack_top); 177e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov CHECK(stack_bottom); 178ed996f79710f532bf231537e44d5c8c9c9d57e8dAlexey Samsonov if (at_initialization) { 179e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // This is the main thread. Libpthread may not be initialized yet. 180e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov struct rlimit rl; 1816985085c4860bf945358f227ddba26511ae770e9Kostya Serebryany CHECK_EQ(getrlimit(RLIMIT_STACK, &rl), 0); 182e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov 183e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // Find the mapping that contains a stack variable. 184e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov MemoryMappingLayout proc_maps; 185e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov uptr start, end, offset; 186e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov uptr prev_end = 0; 187e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov while (proc_maps.Next(&start, &end, &offset, 0, 0)) { 188e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov if ((uptr)&rl < end) 189e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov break; 190e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov prev_end = end; 191e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov } 192e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov CHECK((uptr)&rl >= start && (uptr)&rl < end); 193e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov 194e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // Get stacksize from rlimit, but clip it so that it does not overlap 195e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // with other mappings. 196e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov uptr stacksize = rl.rlim_cur; 197e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov if (stacksize > end - prev_end) 198e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov stacksize = end - prev_end; 199e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // When running with unlimited stack size, we still want to set some limit. 200e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // The unlimited stack size is caused by 'ulimit -s unlimited'. 201e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov // Also, for some reason, GNU make spawns subprocesses with unlimited stack. 202e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov if (stacksize > kMaxThreadStackSize) 203e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov stacksize = kMaxThreadStackSize; 204e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov *stack_top = end; 205e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov *stack_bottom = end - stacksize; 206e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov return; 207e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov } 208e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov pthread_attr_t attr; 2096985085c4860bf945358f227ddba26511ae770e9Kostya Serebryany CHECK_EQ(pthread_getattr_np(pthread_self(), &attr), 0); 210e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov uptr stacksize = 0; 211e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov void *stackaddr = 0; 212e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov pthread_attr_getstack(&attr, &stackaddr, (size_t*)&stacksize); 213e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov pthread_attr_destroy(&attr); 214e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov 215e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov *stack_top = (uptr)stackaddr + stacksize; 216e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov *stack_bottom = (uptr)stackaddr; 217e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov CHECK(stacksize < kMaxThreadStackSize); // Sanity check. 218e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov} 219e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov 2203dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov// Like getenv, but reads env directly from /proc and does not use libc. 2213dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov// This function should be called first inside __asan_init. 2223dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonovconst char *GetEnv(const char *name) { 2233dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov static char *environ; 2243dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov static uptr len; 2253dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov static bool inited; 2263dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov if (!inited) { 2273dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov inited = true; 2283dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov uptr environ_size; 2293dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov len = ReadFileToBuffer("/proc/self/environ", 2303dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov &environ, &environ_size, 1 << 26); 2313dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov } 2323dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov if (!environ || len == 0) return 0; 2333dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov uptr namelen = internal_strlen(name); 2343dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov const char *p = environ; 2353dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov while (*p != '\0') { // will happen at the \0\0 that terminates the buffer 2363dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov // proc file has the format NAME=value\0NAME=value\0NAME=value\0... 2373dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov const char* endp = 2383dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov (char*)internal_memchr(p, '\0', len - (p - environ)); 2393dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov if (endp == 0) // this entry isn't NUL terminated 2403dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov return 0; 2413dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov else if (!internal_memcmp(p, name, namelen) && p[namelen] == '=') // Match. 2423dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov return p + namelen + 1; // point after = 2433dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov p = endp + 1; 2443dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov } 2453dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov return 0; // Not found. 2463dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov} 2473dbeabb3446f203156ae03d957de9bdf50933ae4Alexey Samsonov 248eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov#ifdef __GLIBC__ 249eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 250eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanovextern "C" { 251eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov extern void *__libc_stack_end; 252eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov} 253eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 254eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanovstatic void GetArgsAndEnv(char ***argv, char ***envp) { 255eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov uptr *stack_end = (uptr *)__libc_stack_end; 256eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov int argc = *stack_end; 257eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov *argv = (char**)(stack_end + 1); 258eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov *envp = (char**)(stack_end + argc + 2); 259eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov} 260eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 261eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov#else // __GLIBC__ 262eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 26323709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbournestatic void ReadNullSepFileToArray(const char *path, char ***arr, 26423709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne int arr_size) { 26523709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne char *buff; 266d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov uptr buff_size = 0; 26723709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne *arr = (char **)MmapOrDie(arr_size * sizeof(char *), "NullSepFileArray"); 26823709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne ReadFileToBuffer(path, &buff, &buff_size, 1024 * 1024); 26923709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne (*arr)[0] = buff; 27023709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne int count, i; 27123709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne for (count = 1, i = 1; ; i++) { 272d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov if (buff[i] == 0) { 273d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov if (buff[i+1] == 0) break; 27423709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne (*arr)[count] = &buff[i+1]; 27523709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne CHECK_LE(count, arr_size - 1); // FIXME: make this more flexible. 27623709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne count++; 277d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov } 278d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov } 27923709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne (*arr)[count] = 0; 28023709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne} 28123709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne 282eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanovstatic void GetArgsAndEnv(char ***argv, char ***envp) { 2837b7801d0811e7091240ddbfdcff817791973ef6fEvgeniy Stepanov static const int kMaxArgv = 2000, kMaxEnvp = 2000; 284eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov ReadNullSepFileToArray("/proc/self/cmdline", argv, kMaxArgv); 285eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov ReadNullSepFileToArray("/proc/self/environ", envp, kMaxEnvp); 286eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov} 287eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 288eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov#endif // __GLIBC__ 289eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov 290eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanovvoid ReExec() { 29123709c9ad9ac7c45de288f5260403426bf932db7Peter Collingbourne char **argv, **envp; 292eab061185ec0046d447b298a1dff84f028202a3cEvgeniy Stepanov GetArgsAndEnv(&argv, &envp); 293f35eae83757946decb312deab3f0fe155fe5d580Evgeniy Stepanov execve("/proc/self/exe", argv, envp); 294f35eae83757946decb312deab3f0fe155fe5d580Evgeniy Stepanov Printf("execve failed, errno %d\n", errno); 295f35eae83757946decb312deab3f0fe155fe5d580Evgeniy Stepanov Die(); 296d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov} 297d7e5bb4043adf4756e6f8cfe0f5a3165b185474dAlexey Samsonov 29825742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenkovoid PrepareForSandboxing() { 29925742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // Some kinds of sandboxes may forbid filesystem access, so we won't be able 30025742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // to read the file mappings from /proc/self/maps. Luckily, neither the 30125742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // process will be able to load additional libraries, so it's fine to use the 30225742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko // cached mappings. 30325742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko MemoryMappingLayout::CacheMemoryMappings(); 30425742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko} 30525742574510cfb41b97e32f63f107fbb9b328d13Alexander Potapenko 306e5931fd7d2a74fd7fb60bd8d7f644cca51a24364Alexey Samsonov// ----------------- sanitizer_procmaps.h 307286dd3f8afe6700e5dd9b0bdb7afd23121c98c12Dmitry Vyukov// Linker initialized. 308286dd3f8afe6700e5dd9b0bdb7afd23121c98c12Dmitry VyukovProcSelfMapsBuff MemoryMappingLayout::cached_proc_self_maps_; 309ad91267d45fef531c1082ab7974e4cc78aba5280Alexander PotapenkoStaticSpinMutex MemoryMappingLayout::cache_lock_; // Linker initialized. 31093da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko 311e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey SamsonovMemoryMappingLayout::MemoryMappingLayout() { 312ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko proc_self_maps_.len = 313ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko ReadFileToBuffer("/proc/self/maps", &proc_self_maps_.data, 314ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko &proc_self_maps_.mmaped_size, 1 << 26); 315ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (proc_self_maps_.mmaped_size == 0) { 31693da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko LoadFromCache(); 317ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko CHECK_GT(proc_self_maps_.len, 0); 31893da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 319ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko // internal_write(2, proc_self_maps_.data, proc_self_maps_.len); 3206895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov Reset(); 32193da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko // FIXME: in the future we may want to cache the mappings on demand only. 32293da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko CacheMemoryMappings(); 3236895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 3246895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 325e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey SamsonovMemoryMappingLayout::~MemoryMappingLayout() { 3267385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko // Only unmap the buffer if it is different from the cached one. Otherwise 3277385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko // it will be unmapped when the cache is refreshed. 3287385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko if (proc_self_maps_.data != cached_proc_self_maps_.data) { 3297385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko UnmapOrDie(proc_self_maps_.data, proc_self_maps_.mmaped_size); 3307385f8b8b8723064910cf9737dc929e90aeac548Alexander Potapenko } 3316895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 3326895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 333e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonovvoid MemoryMappingLayout::Reset() { 334ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko current_ = proc_self_maps_.data; 3356895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 3366895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 33793da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko// static 33893da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenkovoid MemoryMappingLayout::CacheMemoryMappings() { 33993da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko SpinMutexLock l(&cache_lock_); 34093da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko // Don't invalidate the cache if the mappings are unavailable. 341ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko ProcSelfMapsBuff old_proc_self_maps; 342ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko old_proc_self_maps = cached_proc_self_maps_; 343ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko cached_proc_self_maps_.len = 344ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko ReadFileToBuffer("/proc/self/maps", &cached_proc_self_maps_.data, 345ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko &cached_proc_self_maps_.mmaped_size, 1 << 26); 346ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (cached_proc_self_maps_.mmaped_size == 0) { 347ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko cached_proc_self_maps_ = old_proc_self_maps; 34893da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } else { 349ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (old_proc_self_maps.mmaped_size) { 350ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko UnmapOrDie(old_proc_self_maps.data, 351ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko old_proc_self_maps.mmaped_size); 35293da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 35393da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 35493da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko} 35593da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko 35693da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenkovoid MemoryMappingLayout::LoadFromCache() { 35793da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko SpinMutexLock l(&cache_lock_); 358ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko if (cached_proc_self_maps_.data) { 359286dd3f8afe6700e5dd9b0bdb7afd23121c98c12Dmitry Vyukov proc_self_maps_ = cached_proc_self_maps_; 36093da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko } 36193da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko} 36293da8b6a5e0ed2ca621897504c5d06449b3d7077Alexander Potapenko 363a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany// Parse a hex value in str and update str. 364a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryanystatic uptr ParseHex(char **str) { 365a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany uptr x = 0; 366a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany char *s; 367a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany for (s = *str; ; s++) { 368a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany char c = *s; 369a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany uptr v = 0; 370a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany if (c >= '0' && c <= '9') 371a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany v = c - '0'; 372a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany else if (c >= 'a' && c <= 'f') 373a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany v = c - 'a' + 10; 374a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany else if (c >= 'A' && c <= 'F') 375a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany v = c - 'A' + 10; 376a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany else 377a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany break; 378a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany x = x * 16 + v; 379a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany } 380a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *str = s; 381a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany return x; 382a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany} 383a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany 384a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryanystatic bool IsOnOf(char c, char c1, char c2) { 385a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany return c == c1 || c == c2; 386a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany} 387a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany 388a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryanystatic bool IsDecimal(char c) { 389a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany return c >= '0' && c <= '9'; 390a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany} 391a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany 392e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonovbool MemoryMappingLayout::Next(uptr *start, uptr *end, uptr *offset, 393e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov char filename[], uptr filename_size) { 394ad91267d45fef531c1082ab7974e4cc78aba5280Alexander Potapenko char *last = proc_self_maps_.data + proc_self_maps_.len; 3956895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (current_ >= last) return false; 3966895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov uptr dummy; 3976895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (!start) start = &dummy; 3986895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (!end) end = &dummy; 3996895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (!offset) offset = &dummy; 4006895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov char *next_line = (char*)internal_memchr(current_, '\n', last - current_); 4016895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (next_line == 0) 4026895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov next_line = last; 403a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany // Example: 08048000-08056000 r-xp 00000000 03:0c 64593 /foo/bar 404a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *start = ParseHex(¤t_); 405bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, '-'); 406a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *end = ParseHex(¤t_); 407bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 408a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany CHECK(IsOnOf(*current_++, '-', 'r')); 409a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany CHECK(IsOnOf(*current_++, '-', 'w')); 410a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany CHECK(IsOnOf(*current_++, '-', 'x')); 411a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany CHECK(IsOnOf(*current_++, 's', 'p')); 412bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 413a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany *offset = ParseHex(¤t_); 414bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 415a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany ParseHex(¤t_); 416bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ':'); 417a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany ParseHex(¤t_); 418bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 419a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany while (IsDecimal(*current_)) 420a4e4744778e6b3067f5cf223cf28bb586c1ecf67Kostya Serebryany current_++; 421bb8a9511bc748d6a4fd601d713bda584ef7bb772Kostya Serebryany CHECK_EQ(*current_++, ' '); 4226895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov // Skip spaces. 4236895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov while (current_ < next_line && *current_ == ' ') 4246895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov current_++; 4256895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov // Fill in the filename. 4266895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov uptr i = 0; 4276895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov while (current_ < next_line) { 4286895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (filename && i < filename_size - 1) 4296895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov filename[i++] = *current_; 4306895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov current_++; 4316895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov } 4326895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov if (filename && i < filename_size) 4336895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov filename[i] = 0; 4346895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov current_ = next_line + 1; 4356895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov return true; 4366895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 4376895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 438e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov// Gets the object name and the offset by walking MemoryMappingLayout. 439e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonovbool MemoryMappingLayout::GetObjectNameAndOffset(uptr addr, uptr *offset, 440e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov char filename[], 441e1f5dac9296df08ff83ae5fca51ce4da995b55cfAlexey Samsonov uptr filename_size) { 4426895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov return IterateForObjectNameAndOffset(addr, offset, filename, filename_size); 4436895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov} 4446895adc39c4e09371154c8037366ad4464163ed0Alexey Samsonov 445dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryanybool SanitizerSetThreadName(const char *name) { 446b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany#ifdef PR_SET_NAME 4471ec519c604021162de8bdb8d433fbad1c5033200Dmitry Vyukov return 0 == prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0); // NOLINT 448b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany#else 449b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany return false; 450b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany#endif 451dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany} 452dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany 453dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryanybool SanitizerGetThreadName(char *name, int max_len) { 454b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany#ifdef PR_GET_NAME 455dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany char buff[17]; 4561ec519c604021162de8bdb8d433fbad1c5033200Dmitry Vyukov if (prctl(PR_GET_NAME, (unsigned long)buff, 0, 0, 0)) // NOLINT 457dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany return false; 458dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany internal_strncpy(name, buff, max_len); 459dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany name[max_len] = 0; 460dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany return true; 461b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany#else 462b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany return false; 463b10a5621daa804f3a2b18fbe75d5fed2a4aeadd3Kostya Serebryany#endif 464dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany} 465dddb18b7be36fe1843c8b98a8d9d7614aef5ce8dKostya Serebryany 4664fce4495502a3668cc4e99164ffcaea92e534d48Dmitry Vyukov#ifndef SANITIZER_GO 467a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany//------------------------- SlowUnwindStack ----------------------------------- 468a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#ifdef __arm__ 469a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#define UNWIND_STOP _URC_END_OF_STACK 470a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#define UNWIND_CONTINUE _URC_NO_REASON 471a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#else 472a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#define UNWIND_STOP _URC_NORMAL_STOP 473a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#define UNWIND_CONTINUE _URC_NO_REASON 474a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#endif 475a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany 476a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryanyuptr Unwind_GetIP(struct _Unwind_Context *ctx) { 477a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#ifdef __arm__ 478a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany uptr val; 479a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany _Unwind_VRS_Result res = _Unwind_VRS_Get(ctx, _UVRSC_CORE, 480a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany 15 /* r15 = PC */, _UVRSD_UINT32, &val); 481a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany CHECK(res == _UVRSR_OK && "_Unwind_VRS_Get failed"); 482a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany // Clear the Thumb bit. 483a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany return val & ~(uptr)1; 484a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#else 485a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany return _Unwind_GetIP(ctx); 486a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany#endif 487a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany} 488a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany 489a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany_Unwind_Reason_Code Unwind_Trace(struct _Unwind_Context *ctx, void *param) { 490a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany StackTrace *b = (StackTrace*)param; 491a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany CHECK(b->size < b->max_size); 492a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany uptr pc = Unwind_GetIP(ctx); 493a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany b->trace[b->size++] = pc; 494a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany if (b->size == b->max_size) return UNWIND_STOP; 495a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany return UNWIND_CONTINUE; 496a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany} 497a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany 49849d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryanystatic bool MatchPc(uptr cur_pc, uptr trace_pc) { 4995e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany return cur_pc - trace_pc <= 64 || trace_pc - cur_pc <= 64; 50049d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryany} 50149d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryany 50249d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryanyvoid StackTrace::SlowUnwindStack(uptr pc, uptr max_depth) { 503a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany this->size = 0; 504a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany this->max_size = max_depth; 505a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany if (max_depth > 1) { 506a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany _Unwind_Backtrace(Unwind_Trace, this); 5075e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany // We need to pop a few frames so that pc is on top. 5085e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany // trace[0] belongs to the current function so we always pop it. 50949d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryany int to_pop = 1; 5105e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany /**/ if (size > 1 && MatchPc(pc, trace[1])) to_pop = 1; 5115e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany else if (size > 2 && MatchPc(pc, trace[2])) to_pop = 2; 5125e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany else if (size > 3 && MatchPc(pc, trace[3])) to_pop = 3; 5135e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany else if (size > 4 && MatchPc(pc, trace[4])) to_pop = 4; 5145e10443518154a9d68d299ef65a0a99ed42193b7Kostya Serebryany else if (size > 5 && MatchPc(pc, trace[5])) to_pop = 5; 51549d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryany this->PopStackFrames(to_pop); 516a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany } 51749d616ec42ab420ce3ebcbe846b21e3729adf5acKostya Serebryany this->trace[0] = pc; 518a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany} 519a30c8f9eac981dcf137e84226810b760e35c7be1Kostya Serebryany 5204fce4495502a3668cc4e99164ffcaea92e534d48Dmitry Vyukov#endif // #ifndef SANITIZER_GO 5214fce4495502a3668cc4e99164ffcaea92e534d48Dmitry Vyukov 522f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukovenum MutexState { 523f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov MtxUnlocked = 0, 524f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov MtxLocked = 1, 525f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov MtxSleeping = 2 526f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov}; 527f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 528f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry VyukovBlockingMutex::BlockingMutex(LinkerInitialized) { 529d164ed175a61529589938b3db3cab076a19acf67Dmitry Vyukov CHECK_EQ(owner_, 0); 530f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov} 531f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 532f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukovvoid BlockingMutex::Lock() { 533f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); 534f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov if (atomic_exchange(m, MtxLocked, memory_order_acquire) == MtxUnlocked) 535f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov return; 536f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov while (atomic_exchange(m, MtxSleeping, memory_order_acquire) != MtxUnlocked) 537c0dbb80bf0eac2771da6faefa5c22155ed4fd33bDmitry Vyukov syscall(__NR_futex, m, FUTEX_WAIT, MtxSleeping, 0, 0, 0); 538f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov} 539f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 540f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukovvoid BlockingMutex::Unlock() { 541f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); 542f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov u32 v = atomic_exchange(m, MtxUnlocked, memory_order_relaxed); 54348526014de78e21f7ed027a60670016bc7f5d292Dmitry Vyukov CHECK_NE(v, MtxUnlocked); 544f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov if (v == MtxSleeping) 545c0dbb80bf0eac2771da6faefa5c22155ed4fd33bDmitry Vyukov syscall(__NR_futex, m, FUTEX_WAKE, 1, 0, 0, 0); 546f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov} 547f4f51f2cc6fa936f0c65577f82e6b62989d546eeDmitry Vyukov 548ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonovvoid BlockingMutex::CheckLocked() { 549ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); 550ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov CHECK_NE(MtxUnlocked, atomic_load(m, memory_order_relaxed)); 551ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov} 552ce700979f644c790c2d9d80f5cc2a1ada0380284Alexey Samsonov 5536fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// ----------------- sanitizer_linux.h 5546fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// The actual size of this structure is specified by d_reclen. 5556fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// Note that getdents64 uses a different structure format. We only provide the 5566fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// 32-bit syscall here. 5576fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanystruct linux_dirent { 5586fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany unsigned long d_ino; 5596fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany unsigned long d_off; 5606fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany unsigned short d_reclen; 5616fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany char d_name[256]; 5626fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany}; 5636fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5646fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// Syscall wrappers. 5656fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanylong internal_ptrace(int request, int pid, void *addr, void *data) { 5666fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_ptrace, request, pid, addr, data); 5676fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5686fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5696fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint internal_waitpid(int pid, int *status, int options) { 5706fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_wait4, pid, status, options, NULL /* rusage */); 5716fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5726fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5736fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint internal_getppid() { 5746fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_getppid); 5756fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5766fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5776fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count) { 5786fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_getdents, fd, dirp, count); 5796fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5806fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5816fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya SerebryanyOFF_T internal_lseek(fd_t fd, OFF_T offset, int whence) { 5826fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_lseek, fd, offset, whence); 5836fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5846fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5856fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5) { 5866fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_prctl, option, arg2, arg3, arg4, arg5); 5876fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5886fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5896fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint internal_sigaltstack(const struct sigaltstack *ss, 5906fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany struct sigaltstack *oss) { 5916fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return syscall(__NR_sigaltstack, ss, oss); 5926fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 5936fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5946fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 5956fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany// ThreadLister implementation. 5966fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya SerebryanyThreadLister::ThreadLister(int pid) 5976fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany : pid_(pid), 5986fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany descriptor_(-1), 5996fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_(true), 6006fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany entry_((linux_dirent *)buffer_), 6016fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany bytes_read_(0) { 6026fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany char task_directory_path[80]; 6036fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany internal_snprintf(task_directory_path, sizeof(task_directory_path), 6046fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany "/proc/%d/task/", pid); 6056fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany descriptor_ = internal_open(task_directory_path, O_RDONLY | O_DIRECTORY); 6066fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (descriptor_ < 0) { 6076fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_ = true; 6086fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany Report("Can't open /proc/%d/task for reading.\n", pid); 6096fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } else { 6106fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_ = false; 6116fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } 6126fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 6136fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6146fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyint ThreadLister::GetNextTID() { 6156fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany int tid = -1; 6166fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany do { 6176fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (error_) 6186fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return -1; 6196fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if ((char *)entry_ >= &buffer_[bytes_read_] && !GetDirectoryEntries()) 6206fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return -1; 6216fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (entry_->d_ino != 0 && entry_->d_name[0] >= '0' && 6226fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany entry_->d_name[0] <= '9') { 6236fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany // Found a valid tid. 6246fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany tid = (int)internal_atoll(entry_->d_name); 6256fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } 6266fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany entry_ = (struct linux_dirent *)(((char *)entry_) + entry_->d_reclen); 6276fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } while (tid < 0); 6286fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return tid; 6296fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 6306fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6316fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanyvoid ThreadLister::Reset() { 6326fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (error_ || descriptor_ < 0) 6336fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return; 6346fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany internal_lseek(descriptor_, 0, SEEK_SET); 6356fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 6366fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6376fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya SerebryanyThreadLister::~ThreadLister() { 6386fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (descriptor_ >= 0) 6396fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany internal_close(descriptor_); 6406fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 6416fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6426fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanybool ThreadLister::error() { return error_; } 6436fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 6446fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryanybool ThreadLister::GetDirectoryEntries() { 6456fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany CHECK_GE(descriptor_, 0); 6466fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany CHECK_NE(error_, true); 6476fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany bytes_read_ = internal_getdents(descriptor_, 6486fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany (struct linux_dirent *)buffer_, 6496fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany sizeof(buffer_)); 6506fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany if (bytes_read_ < 0) { 6516fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany Report("Can't read directory entries from /proc/%d/task.\n", pid_); 6526fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany error_ = true; 6536fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return false; 6546fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } else if (bytes_read_ == 0) { 6556fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return false; 6566fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany } 6576fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany entry_ = (struct linux_dirent *)buffer_; 6586fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany return true; 6596fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany} 6606fb47af2d2d305adbfc3d41bea589d1527a364a9Kostya Serebryany 661ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov} // namespace __sanitizer 662ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov 663ae4d9caa4f47fa6abcd641719e9f520622940c17Alexey Samsonov#endif // __linux__ 664