1088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne//===-- sanitizer_linux_libcdep.cc ----------------------------------------===// 2088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// 3088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// The LLVM Compiler Infrastructure 4088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// 5088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// This file is distributed under the University of Illinois Open Source 6088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// License. See LICENSE.TXT for details. 7088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// 8088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne//===----------------------------------------------------------------------===// 9088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// 10088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// This file is shared between AddressSanitizer and ThreadSanitizer 11088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// run-time libraries and implements linux-specific functions from 12088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// sanitizer_libc.h. 13088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne//===----------------------------------------------------------------------===// 14088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 15088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include "sanitizer_platform.h" 162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if SANITIZER_FREEBSD || SANITIZER_LINUX 17088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 18909fff81b83df049ecc6e02407394640435d7befPirama Arumuga Nainar#include "sanitizer_atomic.h" 19088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include "sanitizer_common.h" 2006cbed8b8ae64b7ace50c1b4e4eed97a2a8b9965Dmitry Vyukov#include "sanitizer_flags.h" 216d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include "sanitizer_freebsd.h" 227847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#include "sanitizer_linux.h" 237847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#include "sanitizer_placement_new.h" 24088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include "sanitizer_procmaps.h" 25088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include "sanitizer_stacktrace.h" 26088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 276d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#if SANITIZER_ANDROID || SANITIZER_FREEBSD 286d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include <dlfcn.h> // for dlsym() 296d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#endif 306d1862363c88c183b0ed7740fca876342cf0474bStephen Hines 31088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include <pthread.h> 322d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <signal.h> 33088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#include <sys/resource.h> 34088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if SANITIZER_FREEBSD 362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <pthread_np.h> 376d1862363c88c183b0ed7740fca876342cf0474bStephen Hines#include <osreldate.h> 382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#define pthread_getattr_np pthread_attr_get_np 392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif 402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if SANITIZER_LINUX 422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <sys/prctl.h> 432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif 442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 457847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#if !SANITIZER_ANDROID 467847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#include <elf.h> 477847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#include <link.h> 482d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#include <unistd.h> 497847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#endif 507847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov 51088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournenamespace __sanitizer { 52088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 532d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines// This function is defined elsewhere if we intercepted pthread_attr_getstack. 542d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesextern "C" { 552d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_WEAK_ATTRIBUTE int 562d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesreal_pthread_attr_getstack(void *attr, void **addr, size_t *size); 572d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} // extern "C" 582d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 592d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesstatic int my_pthread_attr_getstack(void *attr, void **addr, size_t *size) { 6086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if !SANITIZER_GO 6186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (&real_pthread_attr_getstack) 622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return real_pthread_attr_getstack((pthread_attr_t *)attr, addr, size); 6386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 642d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return pthread_attr_getstack((pthread_attr_t *)attr, addr, size); 652d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 662d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 672d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen HinesSANITIZER_WEAK_ATTRIBUTE int 682d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesreal_sigaction(int signum, const void *act, void *oldact); 692d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 702d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesint internal_sigaction(int signum, const void *act, void *oldact) { 7186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if !SANITIZER_GO 7286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (&real_sigaction) 732d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return real_sigaction(signum, act, oldact); 7486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 756d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return sigaction(signum, (const struct sigaction *)act, 766d1862363c88c183b0ed7740fca876342cf0474bStephen Hines (struct sigaction *)oldact); 772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 79088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournevoid GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, 80088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr *stack_bottom) { 81088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK(stack_top); 82088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK(stack_bottom); 83088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (at_initialization) { 84088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // This is the main thread. Libpthread may not be initialized yet. 85088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne struct rlimit rl; 86088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_EQ(getrlimit(RLIMIT_STACK, &rl), 0); 87088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 88088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // Find the mapping that contains a stack variable. 89088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne MemoryMappingLayout proc_maps(/*cache_enabled*/true); 90088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr start, end, offset; 91088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr prev_end = 0; 92088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne while (proc_maps.Next(&start, &end, &offset, 0, 0, /* protection */0)) { 93088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if ((uptr)&rl < end) 94088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne break; 95088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne prev_end = end; 96088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } 97088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK((uptr)&rl >= start && (uptr)&rl < end); 98088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 99088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // Get stacksize from rlimit, but clip it so that it does not overlap 100088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // with other mappings. 101088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr stacksize = rl.rlim_cur; 102088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (stacksize > end - prev_end) 103088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne stacksize = end - prev_end; 104088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // When running with unlimited stack size, we still want to set some limit. 105088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // The unlimited stack size is caused by 'ulimit -s unlimited'. 106088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // Also, for some reason, GNU make spawns subprocesses with unlimited stack. 107088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (stacksize > kMaxThreadStackSize) 108088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne stacksize = kMaxThreadStackSize; 109088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stack_top = end; 110088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stack_bottom = end - stacksize; 111088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return; 112088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } 113088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne pthread_attr_t attr; 1142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines pthread_attr_init(&attr); 115088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_EQ(pthread_getattr_np(pthread_self(), &attr), 0); 116088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr stacksize = 0; 117088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne void *stackaddr = 0; 1182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines my_pthread_attr_getstack(&attr, &stackaddr, (size_t*)&stacksize); 119088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne pthread_attr_destroy(&attr); 120088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 121933a5d2fd96e8758dd12890ed263def8e80f6f02Evgeniy Stepanov CHECK_LE(stacksize, kMaxThreadStackSize); // Sanity check. 122088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stack_top = (uptr)stackaddr + stacksize; 123088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stack_bottom = (uptr)stackaddr; 124088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 125088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 12686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if !SANITIZER_GO 127088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournebool SetEnv(const char *name, const char *value) { 128088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne void *f = dlsym(RTLD_NEXT, "setenv"); 129088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (f == 0) 130088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return false; 131088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne typedef int(*setenv_ft)(const char *name, const char *value, int overwrite); 132088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne setenv_ft setenv_f; 133088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_EQ(sizeof(setenv_f), sizeof(f)); 134088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne internal_memcpy(&setenv_f, &f, sizeof(f)); 1356d1862363c88c183b0ed7740fca876342cf0474bStephen Hines return setenv_f(name, value, 1) == 0; 136088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 13786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 138088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 139088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournebool SanitizerSetThreadName(const char *name) { 140088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#ifdef PR_SET_NAME 141088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return 0 == prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0); // NOLINT 142088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#else 143088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return false; 144088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#endif 145088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 146088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 147088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournebool SanitizerGetThreadName(char *name, int max_len) { 148088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#ifdef PR_GET_NAME 149088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne char buff[17]; 150088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (prctl(PR_GET_NAME, (unsigned long)buff, 0, 0, 0)) // NOLINT 151088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return false; 152088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne internal_strncpy(name, buff, max_len); 153088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne name[max_len] = 0; 154088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return true; 155088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#else 156088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne return false; 157088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#endif 158088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 159088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 1602d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if !SANITIZER_FREEBSD 161088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournestatic uptr g_tls_size; 1622d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif 163088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 164088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#ifdef __i386__ 165088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne# define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall)) 166088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#else 167088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne# define DL_INTERNAL_FUNCTION 168088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#endif 169088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 17086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if defined(__mips__) 17186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines// TlsPreTcbSize includes size of struct pthread_descr and size of tcb 17286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines// head structure. It lies before the static tls blocks. 17386277eb844c4983c81de62d7c050e92fe7155788Stephen Hinesstatic uptr TlsPreTcbSize() { 17486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines const uptr kTcbHead = 16; 17586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines const uptr kTlsAlign = 16; 17686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines const uptr kTlsPreTcbSize = 17786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines (ThreadDescriptorSize() + kTcbHead + kTlsAlign - 1) & ~(kTlsAlign - 1); 17886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InitTlsSize(); 17986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines g_tls_size = (g_tls_size + kTlsPreTcbSize + kTlsAlign -1) & ~(kTlsAlign - 1); 18086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return kTlsPreTcbSize; 18186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 18286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 18386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 184088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbournevoid InitTlsSize() { 18586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO 186088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION; 187088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne get_tls_func get_tls; 188088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info"); 189088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr)); 190088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne internal_memcpy(&get_tls, &get_tls_static_info_ptr, 191088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne sizeof(get_tls_static_info_ptr)); 192088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_NE(get_tls, 0); 193088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne size_t tls_size = 0; 194088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne size_t tls_align = 0; 1956d1862363c88c183b0ed7740fca876342cf0474bStephen Hines get_tls(&tls_size, &tls_align); 196088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne g_tls_size = tls_size; 1972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif // !SANITIZER_FREEBSD && !SANITIZER_ANDROID 198088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 199088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 20086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if (defined(__x86_64__) || defined(__i386__) || defined(__mips__)) \ 20186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines && SANITIZER_LINUX 202088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne// sizeof(struct thread) from glibc. 2032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesstatic atomic_uintptr_t kThreadDescriptorSize; 204088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 205088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourneuptr ThreadDescriptorSize() { 2062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines uptr val = atomic_load(&kThreadDescriptorSize, memory_order_relaxed); 2072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (val) 2082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return val; 20986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if defined(__x86_64__) || defined(__i386__) 2102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#ifdef _CS_GNU_LIBC_VERSION 2116a211c5814e25d6745a5058cc0e499e5235d3821Stephen Hines char buf[64]; 2122d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines uptr len = confstr(_CS_GNU_LIBC_VERSION, buf, sizeof(buf)); 2132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (len < sizeof(buf) && internal_strncmp(buf, "glibc 2.", 8) == 0) { 2142d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines char *end; 2152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines int minor = internal_simple_strtoll(buf + 8, &end, 10); 2162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (end != buf + 8 && (*end == '\0' || *end == '.')) { 2172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines /* sizeof(struct thread) values from various glibc versions. */ 2182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (SANITIZER_X32) 2192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = 1728; // Assume only one particular version for x32. 2202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else if (minor <= 3) 2212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1104, 1696); 2222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else if (minor == 4) 2232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1120, 1728); 2242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else if (minor == 5) 2252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1136, 1728); 2262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else if (minor <= 9) 2272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1136, 1712); 2282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else if (minor == 10) 2292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1168, 1776); 2302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else if (minor <= 12) 2312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1168, 2288); 23286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines else if (minor == 13) 23386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines val = FIRST_32_SECOND_64(1168, 2304); 2342d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines else 2352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines val = FIRST_32_SECOND_64(1216, 2304); 2362d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 2372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (val) 2382d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed); 2392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return val; 2402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 2412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif 24286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#elif defined(__mips__) 24386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // TODO(sagarthakur): add more values as per different glibc versions. 24486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines val = FIRST_32_SECOND_64(1152, 1776); 24586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (val) 24686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed); 24786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return val; 24886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 2492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return 0; 250088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 2514c086441ff9d06e53fa941671781008d453dba49Sergey Matveev 2524c086441ff9d06e53fa941671781008d453dba49Sergey Matveev// The offset at which pointer to self is located in the thread descriptor. 2534c086441ff9d06e53fa941671781008d453dba49Sergey Matveevconst uptr kThreadSelfOffset = FIRST_32_SECOND_64(8, 16); 2544c086441ff9d06e53fa941671781008d453dba49Sergey Matveev 2554c086441ff9d06e53fa941671781008d453dba49Sergey Matveevuptr ThreadSelfOffset() { 2564c086441ff9d06e53fa941671781008d453dba49Sergey Matveev return kThreadSelfOffset; 2574c086441ff9d06e53fa941671781008d453dba49Sergey Matveev} 2584c086441ff9d06e53fa941671781008d453dba49Sergey Matveev 2594c086441ff9d06e53fa941671781008d453dba49Sergey Matveevuptr ThreadSelf() { 2604c086441ff9d06e53fa941671781008d453dba49Sergey Matveev uptr descr_addr; 2612d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# if defined(__i386__) 2624c086441ff9d06e53fa941671781008d453dba49Sergey Matveev asm("mov %%gs:%c1,%0" : "=r"(descr_addr) : "i"(kThreadSelfOffset)); 2632d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# elif defined(__x86_64__) 2644c086441ff9d06e53fa941671781008d453dba49Sergey Matveev asm("mov %%fs:%c1,%0" : "=r"(descr_addr) : "i"(kThreadSelfOffset)); 26586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines# elif defined(__mips__) 26686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // MIPS uses TLS variant I. The thread pointer (in hardware register $29) 26786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // points to the end of the TCB + 0x7000. The pthread_descr structure is 26886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // immediately in front of the TCB. TlsPreTcbSize() includes the size of the 26986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // TCB and the size of pthread_descr. 27086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines const uptr kTlsTcbOffset = 0x7000; 27186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines uptr thread_pointer; 27286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines asm volatile(".set push;\ 27386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines .set mips64r2;\ 27486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines rdhwr %0,$29;\ 27586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines .set pop" : "=r" (thread_pointer)); 27686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines descr_addr = thread_pointer - kTlsTcbOffset - TlsPreTcbSize(); 2772d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# else 2782d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# error "unsupported CPU arch" 2792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# endif 2804c086441ff9d06e53fa941671781008d453dba49Sergey Matveev return descr_addr; 2814c086441ff9d06e53fa941671781008d453dba49Sergey Matveev} 28286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif // (x86_64 || i386 || MIPS) && SANITIZER_LINUX 2832d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 2842d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if SANITIZER_FREEBSD 2852d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesstatic void **ThreadSelfSegbase() { 2862d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void **segbase = 0; 2872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# if defined(__i386__) 2882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // sysarch(I386_GET_GSBASE, segbase); 2892d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines __asm __volatile("mov %%gs:0, %0" : "=r" (segbase)); 2902d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# elif defined(__x86_64__) 2912d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // sysarch(AMD64_GET_FSBASE, segbase); 2922d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines __asm __volatile("movq %%fs:0, %0" : "=r" (segbase)); 2932d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# else 2942d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# error "unsupported CPU arch for FreeBSD platform" 2952d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# endif 2962d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return segbase; 2972d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 298088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 2992d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesuptr ThreadSelf() { 3002d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return (uptr)ThreadSelfSegbase()[2]; 3012d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 3022d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif // SANITIZER_FREEBSD 3032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 30486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if !SANITIZER_GO 3052d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesstatic void GetTls(uptr *addr, uptr *size) { 3062d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if SANITIZER_LINUX 3072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# if defined(__x86_64__) || defined(__i386__) 3082d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *addr = ThreadSelf(); 3092d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *size = GetTlsSize(); 3102d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *addr -= *size; 3112d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *addr += ThreadDescriptorSize(); 31286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines# elif defined(__mips__) 31386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines *addr = ThreadSelf(); 31486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines *size = GetTlsSize(); 3152d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# else 3162d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *addr = 0; 3172d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *size = 0; 3182d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# endif 3192d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#elif SANITIZER_FREEBSD 3202d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void** segbase = ThreadSelfSegbase(); 3212d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *addr = 0; 3222d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *size = 0; 3232d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (segbase != 0) { 3242d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // tcbalign = 16 3252d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // tls_size = round(tls_static_space, tcbalign); 3262d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // dtv = segbase[1]; 3272d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines // dtv[2] = segbase - tls_static_space; 3282d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines void **dtv = (void**) segbase[1]; 3292d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *addr = (uptr) dtv[2]; 3302d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines *size = (*addr == 0) ? 0 : ((uptr) segbase[0] - (uptr) dtv[2]); 3312d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 332088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#else 3332d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# error "Unknown OS" 334088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne#endif 3352d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 33686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 3372d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 33886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if !SANITIZER_GO 3392d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesuptr GetTlsSize() { 3402d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#if SANITIZER_FREEBSD 3412d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines uptr addr, size; 3422d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines GetTls(&addr, &size); 3432d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return size; 3442d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#else 3452d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return g_tls_size; 3462d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif 3472d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines} 34886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 3492d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines 3502d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesvoid GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, 3512d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines uptr *tls_addr, uptr *tls_size) { 35286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#if SANITIZER_GO 35386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // Stub implementation for Go. 35486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines *stk_addr = *stk_size = *tls_addr = *tls_size = 0; 35586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#else 3562d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines GetTls(tls_addr, tls_size); 357088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 358088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr stack_top, stack_bottom; 359088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom); 360088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stk_addr = stack_bottom; 361088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stk_size = stack_top - stack_bottom; 362088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 363088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (!main) { 364088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // If stack and tls intersect, make them non-intersecting. 365088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (*tls_addr > *stk_addr && *tls_addr < *stk_addr + *stk_size) { 366088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_GT(*tls_addr + *tls_size, *stk_addr); 367088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne CHECK_LE(*tls_addr + *tls_size, *stk_addr + *stk_size); 368088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *stk_size -= *tls_size; 369088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne *tls_addr = *stk_addr + *stk_size; 370088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } 371088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } 37286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines#endif 373088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 374088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 3752d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hinesvoid AdjustStackSize(void *attr_) { 376088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne pthread_attr_t *attr = (pthread_attr_t *)attr_; 377088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne uptr stackaddr = 0; 378088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne size_t stacksize = 0; 3792d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines my_pthread_attr_getstack(attr, (void**)&stackaddr, &stacksize); 380088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // GLibC will return (0 - stacksize) as the stack address in the case when 381088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // stacksize is set, but stackaddr is not. 382088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne bool stack_set = (stackaddr != 0) && (stackaddr + stacksize != 0); 383088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne // We place a lot of tool data into TLS, account for that. 384088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne const uptr minstacksize = GetTlsSize() + 128*1024; 385088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (stacksize < minstacksize) { 386088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne if (!stack_set) { 3872d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines if (stacksize != 0) { 3882d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines VPrintf(1, "Sanitizer: increasing stacksize %zu->%zu\n", stacksize, 3892d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines minstacksize); 3902d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines pthread_attr_setstacksize(attr, minstacksize); 3912d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines } 392088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } else { 393088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne Printf("Sanitizer: pre-allocated stack size is insufficient: " 394088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne "%zu < %zu\n", stacksize, minstacksize); 395088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne Printf("Sanitizer: pthread_create is likely to fail.\n"); 396088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } 397088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne } 398088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} 399088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 4007847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#if SANITIZER_ANDROID 4017847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonovuptr GetListOfModules(LoadedModule *modules, uptr max_modules, 4027847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov string_predicate_t filter) { 4032d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines MemoryMappingLayout memory_mapping(false); 4042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines return memory_mapping.DumpListOfModules(modules, max_modules, filter); 4057847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov} 4067847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#else // SANITIZER_ANDROID 4072d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# if !SANITIZER_FREEBSD 4087847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonovtypedef ElfW(Phdr) Elf_Phdr; 4096d1862363c88c183b0ed7740fca876342cf0474bStephen Hines# elif SANITIZER_WORDSIZE == 32 && __FreeBSD_version <= 902001 // v9.2 4106d1862363c88c183b0ed7740fca876342cf0474bStephen Hines# define Elf_Phdr XElf32_Phdr 4116d1862363c88c183b0ed7740fca876342cf0474bStephen Hines# define dl_phdr_info xdl_phdr_info 4126d1862363c88c183b0ed7740fca876342cf0474bStephen Hines# define dl_iterate_phdr(c, b) xdl_iterate_phdr((c), (b)) 4132d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines# endif 4147847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov 4157847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonovstruct DlIteratePhdrData { 4167847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov LoadedModule *modules; 4177847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov uptr current_n; 4187847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov bool first; 4197847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov uptr max_n; 4207847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov string_predicate_t filter; 4217847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov}; 4227847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov 4237847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonovstatic int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) { 4247847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov DlIteratePhdrData *data = (DlIteratePhdrData*)arg; 4257847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov if (data->current_n == data->max_n) 4267847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov return 0; 42786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines InternalScopedString module_name(kMaxPathLength); 4287847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov if (data->first) { 4297847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov data->first = false; 4307847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov // First module is the binary itself. 4317847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov ReadBinaryName(module_name.data(), module_name.size()); 4327847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov } else if (info->dlpi_name) { 43386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines module_name.append("%s", info->dlpi_name); 4347847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov } 43586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (module_name[0] == '\0') 4367847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov return 0; 4377847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov if (data->filter && !data->filter(module_name.data())) 4387847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov return 0; 439909fff81b83df049ecc6e02407394640435d7befPirama Arumuga Nainar LoadedModule *cur_module = &data->modules[data->current_n]; 440909fff81b83df049ecc6e02407394640435d7befPirama Arumuga Nainar cur_module->set(module_name.data(), info->dlpi_addr); 4417847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov data->current_n++; 4427847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov for (int i = 0; i < info->dlpi_phnum; i++) { 4437847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov const Elf_Phdr *phdr = &info->dlpi_phdr[i]; 4447847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov if (phdr->p_type == PT_LOAD) { 4457847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov uptr cur_beg = info->dlpi_addr + phdr->p_vaddr; 4467847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov uptr cur_end = cur_beg + phdr->p_memsz; 4476a211c5814e25d6745a5058cc0e499e5235d3821Stephen Hines bool executable = phdr->p_flags & PF_X; 4486a211c5814e25d6745a5058cc0e499e5235d3821Stephen Hines cur_module->addAddressRange(cur_beg, cur_end, executable); 4497847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov } 4507847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov } 4517847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov return 0; 4527847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov} 4537847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov 4547847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonovuptr GetListOfModules(LoadedModule *modules, uptr max_modules, 4557847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov string_predicate_t filter) { 4567847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov CHECK(modules); 4577847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov DlIteratePhdrData data = {modules, 0, true, max_modules, filter}; 4587847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov dl_iterate_phdr(dl_iterate_phdr_cb, &data); 4597847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov return data.current_n; 4607847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov} 4617847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov#endif // SANITIZER_ANDROID 4627847d77b246635211c3bf465421d49d7af5226c1Alexey Samsonov 46386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines// getrusage does not give us the current RSS, only the max RSS. 46486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines// Still, this is better than nothing if /proc/self/statm is not available 46586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines// for some reason, e.g. due to a sandbox. 46686277eb844c4983c81de62d7c050e92fe7155788Stephen Hinesstatic uptr GetRSSFromGetrusage() { 46786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines struct rusage usage; 46886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (getrusage(RUSAGE_SELF, &usage)) // Failed, probably due to a sandbox. 46986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return 0; 47086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return usage.ru_maxrss << 10; // ru_maxrss is in Kb. 47186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 47286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 47386277eb844c4983c81de62d7c050e92fe7155788Stephen Hinesuptr GetRSS() { 47486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if (!common_flags()->can_use_proc_maps_statm) 47586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return GetRSSFromGetrusage(); 476909fff81b83df049ecc6e02407394640435d7befPirama Arumuga Nainar fd_t fd = OpenFile("/proc/self/statm", RdOnly); 477909fff81b83df049ecc6e02407394640435d7befPirama Arumuga Nainar if (fd == kInvalidFd) 47886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return GetRSSFromGetrusage(); 47986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines char buf[64]; 48086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines uptr len = internal_read(fd, buf, sizeof(buf) - 1); 48186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines internal_close(fd); 48286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines if ((sptr)len <= 0) 48386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return 0; 48486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines buf[len] = 0; 48586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // The format of the file is: 48686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // 1084 89 69 11 0 79 0 48786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // We need the second number which is RSS in pages. 48886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines char *pos = buf; 48986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // Skip the first number. 49086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines while (*pos >= '0' && *pos <= '9') 49186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines pos++; 49286277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // Skip whitespaces. 49386277eb844c4983c81de62d7c050e92fe7155788Stephen Hines while (!(*pos >= '0' && *pos <= '9') && *pos != 0) 49486277eb844c4983c81de62d7c050e92fe7155788Stephen Hines pos++; 49586277eb844c4983c81de62d7c050e92fe7155788Stephen Hines // Read the number. 49686277eb844c4983c81de62d7c050e92fe7155788Stephen Hines uptr rss = 0; 49786277eb844c4983c81de62d7c050e92fe7155788Stephen Hines while (*pos >= '0' && *pos <= '9') 49886277eb844c4983c81de62d7c050e92fe7155788Stephen Hines rss = rss * 10 + *pos++ - '0'; 49986277eb844c4983c81de62d7c050e92fe7155788Stephen Hines return rss * GetPageSizeCached(); 50086277eb844c4983c81de62d7c050e92fe7155788Stephen Hines} 50186277eb844c4983c81de62d7c050e92fe7155788Stephen Hines 502088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne} // namespace __sanitizer 503088ea2b46f97172bd0b0663a629e11cf826b84f7Peter Collingbourne 5042d1fdb26e458c4ddc04155c1d421bced3ba90cd0Stephen Hines#endif // SANITIZER_FREEBSD || SANITIZER_LINUX 505