diff options
Diffstat (limited to 'lib/sanitizer_common/sanitizer_linux_libcdep.cc')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_linux_libcdep.cc | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/lib/sanitizer_common/sanitizer_linux_libcdep.cc b/lib/sanitizer_common/sanitizer_linux_libcdep.cc index 1c7fb7db8844f..6ce47ec620dc7 100644 --- a/lib/sanitizer_common/sanitizer_linux_libcdep.cc +++ b/lib/sanitizer_common/sanitizer_linux_libcdep.cc @@ -23,6 +23,7 @@ #include "sanitizer_file.h" #include "sanitizer_flags.h" #include "sanitizer_freebsd.h" +#include "sanitizer_getauxval.h" #include "sanitizer_linux.h" #include "sanitizer_placement_new.h" #include "sanitizer_procmaps.h" @@ -99,6 +100,10 @@ void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, // Find the mapping that contains a stack variable. MemoryMappingLayout proc_maps(/*cache_enabled*/true); + if (proc_maps.Error()) { + *stack_top = *stack_bottom = 0; + return; + } MemoryMappedSegment segment; uptr prev_end = 0; while (proc_maps.Next(&segment)) { @@ -292,7 +297,7 @@ uptr ThreadDescriptorSize() { val = FIRST_32_SECOND_64(1168, 1776); else if (minor == 11 || (minor == 12 && patch == 1)) val = FIRST_32_SECOND_64(1168, 2288); - else if (minor <= 13) + else if (minor <= 14) val = FIRST_32_SECOND_64(1168, 2304); else val = FIRST_32_SECOND_64(1216, 2304); @@ -652,10 +657,10 @@ u32 GetNumberOfCPUs() { #if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_OPENBSD u32 ncpu; int req[2]; - size_t len = sizeof(ncpu); + uptr len = sizeof(ncpu); req[0] = CTL_HW; req[1] = HW_NCPU; - CHECK_EQ(sysctl(req, 2, &ncpu, &len, NULL, 0), 0); + CHECK_EQ(internal_sysctl(req, 2, &ncpu, &len, NULL, 0), 0); return ncpu; #elif SANITIZER_ANDROID && !defined(CPU_COUNT) && !defined(__aarch64__) // Fall back to /sys/devices/system/cpu on Android when cpu_set_t doesn't @@ -806,6 +811,40 @@ u64 MonotonicNanoTime() { } #endif // SANITIZER_LINUX && !SANITIZER_GO +#if !SANITIZER_OPENBSD +void ReExec() { + const char *pathname = "/proc/self/exe"; + +#if SANITIZER_NETBSD + static const int name[] = { + CTL_KERN, + KERN_PROC_ARGS, + -1, + KERN_PROC_PATHNAME, + }; + char path[400]; + uptr len; + + len = sizeof(path); + if (internal_sysctl(name, ARRAY_SIZE(name), path, &len, NULL, 0) != -1) + pathname = path; +#elif SANITIZER_SOLARIS + pathname = getexecname(); + CHECK_NE(pathname, NULL); +#elif SANITIZER_USE_GETAUXVAL + // Calling execve with /proc/self/exe sets that as $EXEC_ORIGIN. Binaries that + // rely on that will fail to load shared libraries. Query AT_EXECFN instead. + pathname = reinterpret_cast<const char *>(getauxval(AT_EXECFN)); +#endif + + uptr rv = internal_execve(pathname, GetArgv(), GetEnviron()); + int rverrno; + CHECK_EQ(internal_iserror(rv, &rverrno), true); + Printf("execve failed, errno %d\n", rverrno); + Die(); +} +#endif // !SANITIZER_OPENBSD + } // namespace __sanitizer #endif |