diff options
Diffstat (limited to 'lib/sanitizer_common/sanitizer_linux_libcdep.cc')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_linux_libcdep.cc | 149 |
1 files changed, 91 insertions, 58 deletions
diff --git a/lib/sanitizer_common/sanitizer_linux_libcdep.cc b/lib/sanitizer_common/sanitizer_linux_libcdep.cc index 39eb1d216b2ed..0bb66c9d634ec 100644 --- a/lib/sanitizer_common/sanitizer_linux_libcdep.cc +++ b/lib/sanitizer_common/sanitizer_linux_libcdep.cc @@ -13,8 +13,10 @@ //===----------------------------------------------------------------------===// #include "sanitizer_platform.h" + #if SANITIZER_FREEBSD || SANITIZER_LINUX +#include "sanitizer_allocator_internal.h" #include "sanitizer_atomic.h" #include "sanitizer_common.h" #include "sanitizer_flags.h" @@ -47,6 +49,12 @@ #include <android/api-level.h> #endif +#if SANITIZER_ANDROID && __ANDROID_API__ < 21 +#include <android/log.h> +#else +#include <syslog.h> +#endif + #if !SANITIZER_ANDROID #include <elf.h> #include <unistd.h> @@ -54,20 +62,6 @@ namespace __sanitizer { -// This function is defined elsewhere if we intercepted pthread_attr_getstack. -extern "C" { -SANITIZER_WEAK_ATTRIBUTE int -real_pthread_attr_getstack(void *attr, void **addr, size_t *size); -} // extern "C" - -static int my_pthread_attr_getstack(void *attr, void **addr, size_t *size) { -#if !SANITIZER_GO - if (&real_pthread_attr_getstack) - return real_pthread_attr_getstack((pthread_attr_t *)attr, addr, size); -#endif - return pthread_attr_getstack((pthread_attr_t *)attr, addr, size); -} - SANITIZER_WEAK_ATTRIBUTE int real_sigaction(int signum, const void *act, void *oldact); @@ -93,7 +87,8 @@ void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, MemoryMappingLayout proc_maps(/*cache_enabled*/true); uptr start, end, offset; uptr prev_end = 0; - while (proc_maps.Next(&start, &end, &offset, 0, 0, /* protection */0)) { + while (proc_maps.Next(&start, &end, &offset, nullptr, 0, + /* protection */nullptr)) { if ((uptr)&rl < end) break; prev_end = end; @@ -118,8 +113,8 @@ void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, pthread_attr_init(&attr); CHECK_EQ(pthread_getattr_np(pthread_self(), &attr), 0); uptr stacksize = 0; - void *stackaddr = 0; - my_pthread_attr_getstack(&attr, &stackaddr, (size_t*)&stacksize); + void *stackaddr = nullptr; + my_pthread_attr_getstack(&attr, &stackaddr, &stacksize); pthread_attr_destroy(&attr); CHECK_LE(stacksize, kMaxThreadStackSize); // Sanity check. @@ -130,7 +125,7 @@ void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, #if !SANITIZER_GO bool SetEnv(const char *name, const char *value) { void *f = dlsym(RTLD_NEXT, "setenv"); - if (f == 0) + if (!f) return false; typedef int(*setenv_ft)(const char *name, const char *value, int overwrite); setenv_ft setenv_f; @@ -161,7 +156,7 @@ bool SanitizerGetThreadName(char *name, int max_len) { #endif } -#if !SANITIZER_FREEBSD +#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO static uptr g_tls_size; #endif @@ -171,11 +166,15 @@ static uptr g_tls_size; # define DL_INTERNAL_FUNCTION #endif -#if defined(__mips__) +#if defined(__mips__) || defined(__powerpc64__) // TlsPreTcbSize includes size of struct pthread_descr and size of tcb // head structure. It lies before the static tls blocks. static uptr TlsPreTcbSize() { - const uptr kTcbHead = 16; +# if defined(__mips__) + const uptr kTcbHead = 16; // sizeof (tcbhead_t) +# elif defined(__powerpc64__) + const uptr kTcbHead = 88; // sizeof (tcbhead_t) +# endif const uptr kTlsAlign = 16; const uptr kTlsPreTcbSize = (ThreadDescriptorSize() + kTcbHead + kTlsAlign - 1) & ~(kTlsAlign - 1); @@ -187,6 +186,8 @@ static uptr TlsPreTcbSize() { void InitTlsSize() { #if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO +// all current supported platforms have 16 bytes stack alignment + const size_t kStackAlign = 16; typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION; get_tls_func get_tls; void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info"); @@ -197,13 +198,16 @@ void InitTlsSize() { size_t tls_size = 0; size_t tls_align = 0; get_tls(&tls_size, &tls_align); - g_tls_size = tls_size; -#endif // !SANITIZER_FREEBSD && !SANITIZER_ANDROID + if (tls_align < kStackAlign) + tls_align = kStackAlign; + g_tls_size = RoundUpTo(tls_size, tls_align); +#endif // !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO } -#if (defined(__x86_64__) || defined(__i386__) || defined(__mips__)) \ - && SANITIZER_LINUX -// sizeof(struct thread) from glibc. +#if (defined(__x86_64__) || defined(__i386__) || defined(__mips__) \ + || defined(__aarch64__) || defined(__powerpc64__)) \ + && SANITIZER_LINUX && !SANITIZER_ANDROID +// sizeof(struct pthread) from glibc. static atomic_uintptr_t kThreadDescriptorSize; uptr ThreadDescriptorSize() { @@ -218,7 +222,7 @@ uptr ThreadDescriptorSize() { char *end; int minor = internal_simple_strtoll(buf + 8, &end, 10); if (end != buf + 8 && (*end == '\0' || *end == '.')) { - /* sizeof(struct thread) values from various glibc versions. */ + /* sizeof(struct pthread) values from various glibc versions. */ if (SANITIZER_X32) val = 1728; // Assume only one particular version for x32. else if (minor <= 3) @@ -249,6 +253,15 @@ uptr ThreadDescriptorSize() { if (val) atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed); return val; +#elif defined(__aarch64__) + // The sizeof (struct pthread) is the same from GLIBC 2.17 to 2.22. + val = 1776; + atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed); + return val; +#elif defined(__powerpc64__) + val = 1776; // from glibc.ppc64le 2.20-8.fc21 + atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed); + return val; #endif return 0; } @@ -278,6 +291,17 @@ uptr ThreadSelf() { rdhwr %0,$29;\ .set pop" : "=r" (thread_pointer)); descr_addr = thread_pointer - kTlsTcbOffset - TlsPreTcbSize(); +# elif defined(__aarch64__) + descr_addr = reinterpret_cast<uptr>(__builtin_thread_pointer()); +# elif defined(__powerpc64__) + // PPC64LE uses TLS variant I. The thread pointer (in GPR 13) + // points to the end of the TCB + 0x7000. The pthread_descr structure is + // immediately in front of the TCB. TlsPreTcbSize() includes the size of the + // TCB and the size of pthread_descr. + const uptr kTlsTcbOffset = 0x7000; + uptr thread_pointer; + asm("addi %0,13,%1" : "=r"(thread_pointer) : "I"(-kTlsTcbOffset)); + descr_addr = thread_pointer - TlsPreTcbSize(); # else # error "unsupported CPU arch" # endif @@ -307,13 +331,13 @@ uptr ThreadSelf() { #if !SANITIZER_GO static void GetTls(uptr *addr, uptr *size) { -#if SANITIZER_LINUX +#if SANITIZER_LINUX && !SANITIZER_ANDROID # if defined(__x86_64__) || defined(__i386__) *addr = ThreadSelf(); *size = GetTlsSize(); *addr -= *size; *addr += ThreadDescriptorSize(); -# elif defined(__mips__) +# elif defined(__mips__) || defined(__aarch64__) || defined(__powerpc64__) *addr = ThreadSelf(); *size = GetTlsSize(); # else @@ -333,6 +357,9 @@ static void GetTls(uptr *addr, uptr *size) { *addr = (uptr) dtv[2]; *size = (*addr == 0) ? 0 : ((uptr) segbase[0] - (uptr) dtv[2]); } +#elif SANITIZER_ANDROID + *addr = 0; + *size = 0; #else # error "Unknown OS" #endif @@ -341,7 +368,7 @@ static void GetTls(uptr *addr, uptr *size) { #if !SANITIZER_GO uptr GetTlsSize() { -#if SANITIZER_FREEBSD +#if SANITIZER_FREEBSD || SANITIZER_ANDROID uptr addr, size; GetTls(&addr, &size); return size; @@ -376,31 +403,6 @@ void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, #endif } -void AdjustStackSize(void *attr_) { - pthread_attr_t *attr = (pthread_attr_t *)attr_; - uptr stackaddr = 0; - size_t stacksize = 0; - my_pthread_attr_getstack(attr, (void**)&stackaddr, &stacksize); - // GLibC will return (0 - stacksize) as the stack address in the case when - // stacksize is set, but stackaddr is not. - bool stack_set = (stackaddr != 0) && (stackaddr + stacksize != 0); - // We place a lot of tool data into TLS, account for that. - const uptr minstacksize = GetTlsSize() + 128*1024; - if (stacksize < minstacksize) { - if (!stack_set) { - if (stacksize != 0) { - VPrintf(1, "Sanitizer: increasing stacksize %zu->%zu\n", stacksize, - minstacksize); - pthread_attr_setstacksize(attr, minstacksize); - } - } else { - Printf("Sanitizer: pre-allocated stack size is insufficient: " - "%zu < %zu\n", stacksize, minstacksize); - Printf("Sanitizer: pthread_create is likely to fail.\n"); - } - } -} - # if !SANITIZER_FREEBSD typedef ElfW(Phdr) Elf_Phdr; # elif SANITIZER_WORDSIZE == 32 && __FreeBSD_version <= 902001 // v9.2 @@ -455,7 +457,7 @@ extern "C" __attribute__((weak)) int dl_iterate_phdr( uptr GetListOfModules(LoadedModule *modules, uptr max_modules, string_predicate_t filter) { -#if SANITIZER_ANDROID && __ANDROID_API__ < 21 +#if SANITIZER_ANDROID && __ANDROID_API__ <= 22 u32 api_level = AndroidGetApiLevel(); // Fall back to /proc/maps if dl_iterate_phdr is unavailable or broken. // The runtime check allows the same library to work with @@ -510,6 +512,37 @@ uptr GetRSS() { return rss * GetPageSizeCached(); } -} // namespace __sanitizer +// 64-bit Android targets don't provide the deprecated __android_log_write. +// Starting with the L release, syslog() works and is preferable to +// __android_log_write. +#if SANITIZER_LINUX + +#if SANITIZER_ANDROID +static atomic_uint8_t android_log_initialized; + +void AndroidLogInit() { + atomic_store(&android_log_initialized, 1, memory_order_release); +} + +bool ShouldLogAfterPrintf() { + return atomic_load(&android_log_initialized, memory_order_acquire); +} +#else +void AndroidLogInit() {} + +bool ShouldLogAfterPrintf() { return true; } +#endif // SANITIZER_ANDROID + +void WriteOneLineToSyslog(const char *s) { +#if SANITIZER_ANDROID &&__ANDROID_API__ < 21 + __android_log_write(ANDROID_LOG_INFO, NULL, s); +#else + syslog(LOG_INFO, "%s", s); +#endif +} + +#endif // SANITIZER_LINUX + +} // namespace __sanitizer -#endif // SANITIZER_FREEBSD || SANITIZER_LINUX +#endif // SANITIZER_FREEBSD || SANITIZER_LINUX |