asan_mac.cc revision 09672caefb5694f1981a1712fdefa44840a95e67
11e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany//===-- asan_mac.cc -------------------------------------------------------===// 21e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 31e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The LLVM Compiler Infrastructure 41e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 51e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// This file is distributed under the University of Illinois Open Source 61e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// License. See LICENSE.TXT for details. 71e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 81e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany//===----------------------------------------------------------------------===// 91e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 101e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// This file is a part of AddressSanitizer, an address sanity checker. 111e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 121e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// Mac-specific details. 131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany//===----------------------------------------------------------------------===// 141e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 15d6567c5166412f6acdde851e767c26f332d51d3dKostya Serebryany#ifdef __APPLE__ 161e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 171e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_mac.h" 181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_internal.h" 208a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko#include "asan_procmaps.h" 211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_stack.h" 221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_thread.h" 231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include "asan_thread_registry.h" 241e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 251e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko#include <crt_externs.h> // for _NSGetEnviron 268a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko#include <mach-o/dyld.h> 279b993e8cd0f8964782ee93524603d0c53adc2249Kostya Serebryany#include <mach-o/loader.h> 281e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include <sys/mman.h> 29ef14ff6512d7b2e20aa3206dff820b5f90285420Kostya Serebryany#include <sys/resource.h> 3059dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko#include <sys/sysctl.h> 319107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany#include <sys/ucontext.h> 32c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany#include <pthread.h> 33a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany#include <fcntl.h> 341e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany#include <unistd.h> 35d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany#include <libkern/OSAtomic.h> 361e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 371e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanynamespace __asan { 381e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 393281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenkovoid *island_allocator_pos = NULL; 403281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko 419107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryanyvoid GetPcSpBp(void *context, uintptr_t *pc, uintptr_t *sp, uintptr_t *bp) { 429107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany ucontext_t *ucontext = (ucontext_t*)context; 439107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany# if __WORDSIZE == 64 449107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany *pc = ucontext->uc_mcontext->__ss.__rip; 459107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany *bp = ucontext->uc_mcontext->__ss.__rbp; 469107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany *sp = ucontext->uc_mcontext->__ss.__rsp; 479107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany# else 489107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany *pc = ucontext->uc_mcontext->__ss.__eip; 499107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany *bp = ucontext->uc_mcontext->__ss.__ebp; 509107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany *sp = ucontext->uc_mcontext->__ss.__esp; 519107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany# endif // __WORDSIZE 529107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany} 539107c26bd88fc9cf44a2cd7d6967eb830ac63be3Kostya Serebryany 5459dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenkoint GetMacosVersion() { 5559dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko int mib[2] = { CTL_KERN, KERN_OSRELEASE }; 5659dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko char version[100]; 5759dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko size_t len = 0, maxlen = sizeof(version) / sizeof(version[0]); 5859dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko for (int i = 0; i < maxlen; i++) version[i] = '\0'; 5959dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko // Get the version length. 6059dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko CHECK(sysctl(mib, 2, NULL, &len, NULL, 0) != -1); 6159dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko CHECK(len < maxlen); 6259dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko CHECK(sysctl(mib, 2, version, &len, NULL, 0) != -1); 6359dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko switch (version[0]) { 6459dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko case '9': return MACOS_VERSION_LEOPARD; 6559dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko case '1': { 6659dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko switch (version[1]) { 6759dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko case '0': return MACOS_VERSION_SNOW_LEOPARD; 6859dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko case '1': return MACOS_VERSION_LION; 6959dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko default: return MACOS_VERSION_UNKNOWN; 7059dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko } 7159dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko } 7259dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko default: return MACOS_VERSION_UNKNOWN; 7359dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko } 7459dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko} 7559dc578df0de177b44c8c78f69d73735e38e5c14Alexander Potapenko 761e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// No-op. Mac does not support static linkage anyway. 771e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyvoid *AsanDoesNotSupportStaticLinkage() { 781e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return NULL; 791e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 801e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 814803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryanybool AsanInterceptsSignal(int signum) { 824803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany return (signum == SIGSEGV || signum == SIGBUS) && FLAG_handle_segv; 834803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany} 844803ab90ead451b55a5833f0fd38b10fd1fc83ebKostya Serebryany 85a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryanystatic void *asan_mmap(void *addr, size_t length, int prot, int flags, 861e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany int fd, uint64_t offset) { 871e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return mmap(addr, length, prot, flags, fd, offset); 881e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 891e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 900ecf5eb729dd81a43f8585cb438d3cb2a35899edKostya Serebryanysize_t AsanWrite(int fd, const void *buf, size_t count) { 911e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return write(fd, buf, count); 921e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 931e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 94de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryanyvoid *AsanMmapSomewhereOrDie(size_t size, const char *mem_type) { 95de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany size = RoundUpTo(size, kPageSize); 96de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany void *res = asan_mmap(0, size, 97de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany PROT_READ | PROT_WRITE, 98de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany MAP_PRIVATE | MAP_ANON, -1, 0); 99de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany if (res == (void*)-1) { 100de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany OutOfMemoryMessageAndDie(mem_type, size); 101de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany } 102de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany return res; 103de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany} 104de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany 105a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryanyvoid *AsanMmapFixedNoReserve(uintptr_t fixed_addr, size_t size) { 106a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany return asan_mmap((void*)fixed_addr, size, 107a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany PROT_READ | PROT_WRITE, 108a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany MAP_PRIVATE | MAP_ANON | MAP_FIXED | MAP_NORESERVE, 109a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany 0, 0); 110a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany} 111a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany 112a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryanyvoid *AsanMprotect(uintptr_t fixed_addr, size_t size) { 113a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany return asan_mmap((void*)fixed_addr, size, 114a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany PROT_NONE, 115a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany MAP_PRIVATE | MAP_ANON | MAP_FIXED | MAP_NORESERVE, 116a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany 0, 0); 117a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany} 118a874fe5b5d67152e4e737498d532eec80940bdcdKostya Serebryany 119de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryanyvoid AsanUnmapOrDie(void *addr, size_t size) { 120de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany if (!addr || !size) return; 121de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany int res = munmap(addr, size); 122de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany if (res != 0) { 123de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany Report("Failed to unmap\n"); 1240ecf5eb729dd81a43f8585cb438d3cb2a35899edKostya Serebryany AsanDie(); 125de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany } 126de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany} 127de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany 128de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryanyint AsanOpenReadonly(const char* filename) { 129de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany return open(filename, O_RDONLY); 130de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany} 131de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany 1321e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenkoconst char *AsanGetEnv(const char *name) { 1331e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko char ***env_ptr = _NSGetEnviron(); 1341e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko CHECK(env_ptr); 1351e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko char **environ = *env_ptr; 1361e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko CHECK(environ); 1371e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko size_t name_len = internal_strlen(name); 1381e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko while (*environ != NULL) { 1391e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko size_t len = internal_strlen(*environ); 1401e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko if (len > name_len) { 1411e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko const char *p = *environ; 1421e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko if (!internal_memcmp(p, name, name_len) && 1431e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko p[name_len] == '=') { // Match. 1444dd8ba8238b1b698953628affe6e5b2edf3b3e3fAlexey Samsonov return *environ + name_len + 1; // String starting after =. 1451e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko } 1461e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko } 1471e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko environ++; 1481e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko } 1491e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko return NULL; 1501e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko} 1511e316d7f488a75312539629e9d937e156280eeb6Alexander Potapenko 1520ecf5eb729dd81a43f8585cb438d3cb2a35899edKostya Serebryanysize_t AsanRead(int fd, void *buf, size_t count) { 153de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany return read(fd, buf, count); 154de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany} 155de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany 156de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryanyint AsanClose(int fd) { 157de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany return close(fd); 158de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany} 159de496f451bce322b6cde100456591f1f50ab3477Kostya Serebryany 1608a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander PotapenkoAsanProcMaps::AsanProcMaps() { 1618a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko Reset(); 1628a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko} 1638a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko 1648a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander PotapenkoAsanProcMaps::~AsanProcMaps() { 1658a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko} 1668a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko 1673feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// More information about Mach-O headers can be found in mach-o/loader.h 1683feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// Each Mach-O image has a header (mach_header or mach_header_64) starting with 1693feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// a magic number, and a list of linker load commands directly following the 1703feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// header. 1713feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// A load command is at least two 32-bit words: the command type and the 1723feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// command size in bytes. We're interested only in segment load commands 1733feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// (LC_SEGMENT and LC_SEGMENT_64), which tell that a part of the file is mapped 1743feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// into the task's address space. 1753feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// The |vmaddr|, |vmsize| and |fileoff| fields of segment_command or 1763feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// segment_command_64 correspond to the memory address, memory size and the 1773feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// file offset of the current memory segment. 1783feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// Because these fields are taken from the images as is, one needs to add 1793feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// _dyld_get_image_vmaddr_slide() to get the actual addresses at runtime. 1803feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko 1818a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenkovoid AsanProcMaps::Reset() { 1828a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko // Count down from the top. 1838a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko // TODO(glider): as per man 3 dyld, iterating over the headers with 1843feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko // _dyld_image_count is thread-unsafe. We need to register callbacks for 1853feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko // adding and removing images which will invalidate the AsanProcMaps state. 1868a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko current_image_ = _dyld_image_count(); 1873feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko current_load_cmd_count_ = -1; 1883feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko current_load_cmd_addr_ = NULL; 189ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko current_magic_ = 0; 1903feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko} 1913feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko 1923feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// Next and NextSegmentLoad were inspired by base/sysinfo.cc in 1933feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// Google Perftools, http://code.google.com/p/google-perftools. 1943feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko 1953feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// NextSegmentLoad scans the current image for the next segment load command 1963feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// and returns the start and end addresses and file offset of the corresponding 1973feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// segment. 1983feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko// Note that the segment addresses are not necessarily sorted. 1993feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenkotemplate<uint32_t kLCSegment, typename SegmentCommand> 2003feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenkobool AsanProcMaps::NextSegmentLoad( 2013feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko uintptr_t *start, uintptr_t *end, uintptr_t *offset, 2023feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko char filename[], size_t filename_size) { 2033feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko const char* lc = current_load_cmd_addr_; 2043feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko current_load_cmd_addr_ += ((const load_command *)lc)->cmdsize; 2058a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko if (((const load_command *)lc)->cmd == kLCSegment) { 2063feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko const intptr_t dlloff = _dyld_get_image_vmaddr_slide(current_image_); 2078a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko const SegmentCommand* sc = (const SegmentCommand *)lc; 2088a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko if (start) *start = sc->vmaddr + dlloff; 2098a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko if (end) *end = sc->vmaddr + sc->vmsize + dlloff; 2108a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko if (offset) *offset = sc->fileoff; 2118a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko if (filename) { 21209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(strncpy)(filename, _dyld_get_image_name(current_image_), 21309672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov filename_size); 2148a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko } 215ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko if (FLAG_v >= 4) 216ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko Report("LC_SEGMENT: %p--%p %s+%p\n", *start, *end, filename, *offset); 2178a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko return true; 2188a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko } 2198a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko return false; 2208a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko} 2218a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko 2228a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenkobool AsanProcMaps::Next(uintptr_t *start, uintptr_t *end, 2238a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko uintptr_t *offset, char filename[], 2248a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko size_t filename_size) { 2258a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko for (; current_image_ >= 0; current_image_--) { 2268a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko const mach_header* hdr = _dyld_get_image_header(current_image_); 2278a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko if (!hdr) continue; 2283feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko if (current_load_cmd_count_ < 0) { 2293feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko // Set up for this image; 2303feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko current_load_cmd_count_ = hdr->ncmds; 231ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko current_magic_ = hdr->magic; 232ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko switch (current_magic_) { 2333feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko#ifdef MH_MAGIC_64 2343feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko case MH_MAGIC_64: { 2353feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko current_load_cmd_addr_ = (char*)hdr + sizeof(mach_header_64); 2363feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko break; 2373feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko } 2383feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko#endif 2393feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko case MH_MAGIC: { 2403feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko current_load_cmd_addr_ = (char*)hdr + sizeof(mach_header); 2413feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko break; 2423feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko } 2433feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko default: { 2443feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko continue; 2453feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko } 2463feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko } 2473feef82eab6d5f0ace384a670bfb5988e0c165a0Alexander Potapenko } 2488a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko 249ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko for (; current_load_cmd_count_ >= 0; current_load_cmd_count_--) { 250ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko switch (current_magic_) { 251ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko // current_magic_ may be only one of MH_MAGIC, MH_MAGIC_64. 2528a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko#ifdef MH_MAGIC_64 253ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko case MH_MAGIC_64: { 254ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko if (NextSegmentLoad<LC_SEGMENT_64, struct segment_command_64>( 255ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko start, end, offset, filename, filename_size)) 256ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko return true; 257ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko break; 258ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko } 2598a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko#endif 260ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko case MH_MAGIC: { 261ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko if (NextSegmentLoad<LC_SEGMENT, struct segment_command>( 262ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko start, end, offset, filename, filename_size)) 263ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko return true; 264ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko break; 265ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko } 266ddf50a3e7a28c2ab12243e72b35ccf8c04f15b49Alexander Potapenko } 2678a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko } 2688a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko // If we get here, no more load_cmd's in this image talk about 2698a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko // segments. Go on to the next image. 2708a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko } 2718a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko return false; 2728a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko} 2738a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko 2748a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenkobool AsanProcMaps::GetObjectNameAndOffset(uintptr_t addr, uintptr_t *offset, 2758a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko char filename[], 2768a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko size_t filename_size) { 2778a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko return IterateForObjectNameAndOffset(addr, offset, filename, filename_size); 2788a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko} 2798a34d384255f9bf4c2a9b03a4df81b9af57124d8Alexander Potapenko 280c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryanyvoid AsanThread::SetThreadStackTopAndBottom() { 281c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany size_t stacksize = pthread_get_stacksize_np(pthread_self()); 282c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany void *stackaddr = pthread_get_stackaddr_np(pthread_self()); 283c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany stack_top_ = (uintptr_t)stackaddr; 284c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany stack_bottom_ = stack_top_ - stacksize; 285c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany int local; 286c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany CHECK(AddrIsInStack((uintptr_t)&local)); 287c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany} 288c549dd7b5fa5fb97270f57067797224cee0429f2Kostya Serebryany 289d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya SerebryanyAsanLock::AsanLock(LinkerInitialized) { 290d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany // We assume that OS_SPINLOCK_INIT is zero 291d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany} 292d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany 293d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryanyvoid AsanLock::Lock() { 294d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany CHECK(sizeof(OSSpinLock) <= sizeof(opaque_storage_)); 295d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany CHECK(OS_SPINLOCK_INIT == 0); 296d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany CHECK(owner_ != (uintptr_t)pthread_self()); 297d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany OSSpinLockLock((OSSpinLock*)&opaque_storage_); 298d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany CHECK(!owner_); 299d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany owner_ = (uintptr_t)pthread_self(); 300d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany} 301d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany 302d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryanyvoid AsanLock::Unlock() { 303d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany CHECK(owner_ == (uintptr_t)pthread_self()); 304d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany owner_ = 0; 305d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany OSSpinLockUnlock((OSSpinLock*)&opaque_storage_); 306d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany} 307d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany 3089cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanovvoid AsanStackTrace::GetStackTrace(size_t max_s, uintptr_t pc, uintptr_t bp) { 3099cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov size = 0; 3109cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov trace[0] = pc; 3119cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov if ((max_s) > 1) { 3129cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov max_size = max_s; 3139cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov FastUnwindStack(pc, bp); 3149cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov } 3159cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov} 3169cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov 3173281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko// The range of pages to be used by __asan_mach_override_ptr for escape 3183281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko// islands. 3193281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko// TODO(glider): instead of mapping a fixed range we must find a range of 3203281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko// unmapped pages in vmmap and take them. 3211346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko// These constants were chosen empirically and may not work if the shadow 3221346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko// memory layout changes. Unfortunately they do necessarily depend on 3231346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko// kHighMemBeg or kHighMemEnd. 3241346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko#if __WORDSIZE == 32 3251346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko#define kIslandEnd (0xffdf0000 - kPageSize) 3261346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko#define kIslandBeg (kIslandEnd - 256 * kPageSize) 3271346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko#else 3283281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko#define kIslandEnd (0x7fffffdf0000 - kPageSize) 3293281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko#define kIslandBeg (kIslandEnd - 256 * kPageSize) 3301346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko#endif 3313281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko 3323281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenkoextern "C" 3333281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenkomach_error_t __asan_allocate_island(void **ptr, 3343281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko size_t unused_size, 3353281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko void *unused_hint) { 3363281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko if (!island_allocator_pos) { 3371346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko island_allocator_pos = 3381346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko asan_mmap((void*)kIslandBeg, kIslandEnd - kIslandBeg, 3391346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko PROT_READ | PROT_WRITE | PROT_EXEC, 3401346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko MAP_PRIVATE | MAP_ANON | MAP_FIXED, 3411346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko -1, 0); 3421346ced2eb8d10305e8d98496d9006cfbbad1548Alexander Potapenko if (island_allocator_pos != (void*)kIslandBeg) { 3433281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko return KERN_NO_SPACE; 3443281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko } 3453281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko }; 3463281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko *ptr = island_allocator_pos; 3473281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko island_allocator_pos = (char*)island_allocator_pos + kPageSize; 3483281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko return err_none; 3493281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko} 3503281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko 3513281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenkoextern "C" 3523281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenkomach_error_t __asan_deallocate_island(void *ptr) { 3533281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko // Do nothing. 3543281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko // TODO(glider): allow to free and reuse the island memory. 3553281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko return err_none; 3563281209790b5e543c79acb2f5008d1df77fb76d9Alexander Potapenko} 357d55f5f8c413622db4bd28b5cca9bfeb4d61564e0Kostya Serebryany 3581e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// Support for the following functions from libdispatch on Mac OS: 3591e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_async_f() 3601e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_async() 3611e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_sync_f() 3621e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_sync() 3631e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_after_f() 3641e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_after() 3651e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_group_async_f() 3661e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_group_async() 3671e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// TODO(glider): libdispatch API contains other functions that we don't support 3681e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// yet. 3691e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 3701e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_sync() and dispatch_sync_f() are synchronous, although chances are 3711e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// they can cause jobs to run on a thread different from the current one. 3721e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// TODO(glider): if so, we need a test for this (otherwise we should remove 3731e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// them). 3741e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 3751e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The following functions use dispatch_barrier_async_f() (which isn't a library 3761e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// function but is exported) and are thus supported: 3771e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_source_set_cancel_handler_f() 3781e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_source_set_cancel_handler() 3791e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_source_set_event_handler_f() 3801e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// dispatch_source_set_event_handler() 3811e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// 3821e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The reference manual for Grand Central Dispatch is available at 3831e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// http://developer.apple.com/library/mac/#documentation/Performance/Reference/GCD_libdispatch_Ref/Reference/reference.html 3841e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The implementation details are at 3851e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// http://libdispatch.macosforge.org/trac/browser/trunk/src/queue.c 3861e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 3871e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyextern "C" 3881e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyvoid asan_dispatch_call_block_and_release(void *block) { 3899cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 3901e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *context = (asan_block_context_t*)block; 3911e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 3921e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("asan_dispatch_call_block_and_release(): " 3931e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany "context: %p, pthread_self: %p\n", 3941e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany block, pthread_self()); 3951e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 3961e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany AsanThread *t = asanThreadRegistry().GetCurrent(); 397af3441580555ceed092170232cd5f2cc180f19f4Kostya Serebryany if (!t) { 39855cdfc6c5af92560bc0623b5a0d70af71511c3c8Alexey Samsonov t = AsanThread::Create(context->parent_tid, NULL, NULL, &stack); 39955cdfc6c5af92560bc0623b5a0d70af71511c3c8Alexey Samsonov asanThreadRegistry().RegisterThread(t); 40069eca73ac96688c8bfe1f23ee006af29c7858c40Kostya Serebryany t->Init(); 4011e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asanThreadRegistry().SetCurrent(t); 4021e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 4031e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany // Call the original dispatcher for the block. 4041e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany context->func(context->block); 4051e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_free(context, &stack); 4061e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4071e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 4081e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} // namespace __asan 4091e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 4101e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyusing namespace __asan; // NOLINT 4111e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 4121e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// Wrap |ctxt| and |func| into an asan_block_context_t. 4131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The caller retains control of the allocated context. 4141e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyextern "C" 4151e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyasan_block_context_t *alloc_asan_context(void *ctxt, dispatch_function_t func, 4161e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany AsanStackTrace *stack) { 4171e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = 4181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany (asan_block_context_t*) asan_malloc(sizeof(asan_block_context_t), stack); 4191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt->block = ctxt; 4201e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt->func = func; 4211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt->parent_tid = asanThreadRegistry().GetCurrentTidOrMinusOne(); 4221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return asan_ctxt; 4231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4241e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 4251e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// TODO(glider): can we reduce code duplication by introducing a macro? 426f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, dispatch_async_f, dispatch_queue_t dq, void *ctxt, 427f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_function_t func) { 4289cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 4291e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack); 4301e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 4311e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("dispatch_async_f(): context: %p, pthread_self: %p\n", 4321e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt, pthread_self()); 4331e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany PRINT_CURRENT_STACK(); 4341e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 43509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(dispatch_async_f)(dq, (void*)asan_ctxt, 43609672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov asan_dispatch_call_block_and_release); 4371e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4381e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 439f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, dispatch_sync_f, dispatch_queue_t dq, void *ctxt, 440f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_function_t func) { 4419cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 4421e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack); 4431e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 4441e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("dispatch_sync_f(): context: %p, pthread_self: %p\n", 4451e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt, pthread_self()); 4461e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany PRINT_CURRENT_STACK(); 4471e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 44809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(dispatch_sync_f)(dq, (void*)asan_ctxt, 44909672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov asan_dispatch_call_block_and_release); 4501e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4511e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 452f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, dispatch_after_f, dispatch_time_t when, 453f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_queue_t dq, void *ctxt, 454f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_function_t func) { 4559cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 4561e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack); 4571e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 4581e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("dispatch_after_f: %p\n", asan_ctxt); 4591e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany PRINT_CURRENT_STACK(); 4601e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 46109672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(dispatch_after_f)(when, dq, (void*)asan_ctxt, 46209672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov asan_dispatch_call_block_and_release); 4631e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4641e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 465f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, dispatch_barrier_async_f, dispatch_queue_t dq, void *ctxt, 466f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_function_t func) { 4679cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 4681e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack); 4691e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 4701e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("dispatch_barrier_async_f(): context: %p, pthread_self: %p\n", 4711e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt, pthread_self()); 4721e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany PRINT_CURRENT_STACK(); 4731e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 47409672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(dispatch_barrier_async_f)(dq, (void*)asan_ctxt, 47509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov asan_dispatch_call_block_and_release); 4761e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4771e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 478f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(void, dispatch_group_async_f, dispatch_group_t group, 479f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_queue_t dq, void *ctxt, 480f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov dispatch_function_t func) { 4819cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 4821e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack); 4831e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 4841e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("dispatch_group_async_f(): context: %p, pthread_self: %p\n", 4851e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt, pthread_self()); 4861e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany PRINT_CURRENT_STACK(); 4871e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 48809672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov REAL(dispatch_group_async_f)(group, dq, (void*)asan_ctxt, 48909672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov asan_dispatch_call_block_and_release); 4901e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 4911e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 4921e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// The following stuff has been extremely helpful while looking for the 4931e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// unhandled functions that spawned jobs on Chromium shutdown. If the verbosity 4941e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// level is 2 or greater, we wrap pthread_workqueue_additem_np() in order to 4951e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// find the points of worker thread creation (each of such threads may be used 4961e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// to run several tasks, that's why this is not enough to support the whole 4971e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany// libdispatch API. 4981e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyextern "C" 4991e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryanyvoid *wrap_workitem_func(void *arg) { 5001e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 5011e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("wrap_workitem_func: %p, pthread_self: %p\n", arg, pthread_self()); 5021e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 5031e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *ctxt = (asan_block_context_t*)arg; 5041e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany worker_t fn = (worker_t)(ctxt->func); 5051e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany void *result = fn(ctxt->block); 5069cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 5071e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_free(arg, &stack); 5081e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany return result; 5091e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 5101e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany 511f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(int, pthread_workqueue_additem_np, pthread_workqueue_t workq, 5121e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany void *(*workitem_func)(void *), void * workitem_arg, 5131e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp) { 5149cfa194cc62026fc7c6e82f7303eee8ad4d10cf4Evgeniy Stepanov GET_STACK_TRACE_HERE(kStackTraceMax); 5151e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_block_context_t *asan_ctxt = 5161e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany (asan_block_context_t*) asan_malloc(sizeof(asan_block_context_t), &stack); 5171e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt->block = workitem_arg; 5181e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt->func = (dispatch_function_t)workitem_func; 5191e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany asan_ctxt->parent_tid = asanThreadRegistry().GetCurrentTidOrMinusOne(); 5201e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany if (FLAG_v >= 2) { 5211e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany Report("pthread_workqueue_additem_np: %p\n", asan_ctxt); 5221e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany PRINT_CURRENT_STACK(); 5231e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany } 52409672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(pthread_workqueue_additem_np)(workq, wrap_workitem_func, 52509672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov asan_ctxt, itemhandlep, 52609672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov gencountp); 5271e172b4bdec57329bf904f063a29f99cddf2d85fKostya Serebryany} 528d6567c5166412f6acdde851e767c26f332d51d3dKostya Serebryany 529431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko// CF_RC_BITS, the layout of CFRuntimeBase and __CFStrIsConstant are internal 530431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko// and subject to change in further CoreFoundation versions. Apple does not 531431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko// guarantee any binary compatibility from release to release. 532431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko 533431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko// See http://opensource.apple.com/source/CF/CF-635.15/CFInternal.h 534431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#if defined(__BIG_ENDIAN__) 535431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#define CF_RC_BITS 0 536431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#endif 537431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko 538431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#if defined(__LITTLE_ENDIAN__) 539431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#define CF_RC_BITS 3 540431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#endif 541431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko 542431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko// See http://opensource.apple.com/source/CF/CF-635.15/CFRuntime.h 543431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenkotypedef struct __CFRuntimeBase { 544431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko uintptr_t _cfisa; 545431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko uint8_t _cfinfo[4]; 546431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#if __LP64__ 547431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko uint32_t _rc; 548431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#endif 549431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko} CFRuntimeBase; 550431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko 551431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko// See http://opensource.apple.com/source/CF/CF-635.15/CFString.c 552431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenkoint __CFStrIsConstant(CFStringRef str) { 553431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko CFRuntimeBase *base = (CFRuntimeBase*)str; 554431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#if __LP64__ 555431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko return base->_rc == 0; 556431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#else 557431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko return (base->_cfinfo[CF_RC_BITS]) == 0; 558431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko#endif 559431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko} 560431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko 561f2598fc21bf651d23feab396a7581d48c01c3be5Alexey SamsonovINTERCEPTOR(CFStringRef, CFStringCreateCopy, CFAllocatorRef alloc, 562f2598fc21bf651d23feab396a7581d48c01c3be5Alexey Samsonov CFStringRef str) { 563431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko if (__CFStrIsConstant(str)) { 564431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko return str; 565431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko } else { 56609672caefb5694f1981a1712fdefa44840a95e67Alexey Samsonov return REAL(CFStringCreateCopy)(alloc, str); 567431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko } 568431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko} 569431e51782d62d1257348e41e24da6b544fe70507Alexander Potapenko 570d6567c5166412f6acdde851e767c26f332d51d3dKostya Serebryany#endif // __APPLE__ 571