diff options
Diffstat (limited to 'compiler-rt/lib/asan/asan_rtl.cc')
| -rw-r--r-- | compiler-rt/lib/asan/asan_rtl.cc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/compiler-rt/lib/asan/asan_rtl.cc b/compiler-rt/lib/asan/asan_rtl.cc index 11adbee5bde..8ea5449ff9d 100644 --- a/compiler-rt/lib/asan/asan_rtl.cc +++ b/compiler-rt/lib/asan/asan_rtl.cc @@ -164,6 +164,7 @@ void InitializeFlags(Flags *f, const char *env) { int asan_inited; bool asan_init_is_running; void (*death_callback)(void); +uptr kHighMemEnd; // -------------------------- Misc ---------------- {{{1 void ShowStatsAndAbort() { @@ -263,6 +264,24 @@ static void asan_atexit() { __asan_print_accumulated_stats(); } +static void InitializeHighMemEnd() { +#if SANITIZER_WORDSIZE == 64 +# if defined(__powerpc64__) + // FIXME: + // On PowerPC64 we have two different address space layouts: 44- and 46-bit. + // We somehow need to figure our which one we are using now and choose + // one of 0x00000fffffffffffUL and 0x00003fffffffffffUL. + // Note that with 'ulimit -s unlimited' the stack is moved away from the top + // of the address space, so simply checking the stack address is not enough. + kHighMemEnd = (1ULL << 44) - 1; // 0x00000fffffffffffUL +# else + kHighMemEnd = (1ULL << 47) - 1; // 0x00007fffffffffffUL; +# endif +#else // SANITIZER_WORDSIZE == 32 + kHighMemEnd = (1ULL << 32) - 1; // 0xffffffff; +#endif // SANITIZER_WORDSIZE +} + } // namespace __asan // ---------------------- Interface ---------------- {{{1 @@ -299,6 +318,7 @@ void __asan_init() { if (asan_inited) return; CHECK(!asan_init_is_running && "ASan init calls itself!"); asan_init_is_running = true; + InitializeHighMemEnd(); // Make sure we are not statically linked. AsanDoesNotSupportStaticLinkage(); |
