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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2014-04-11 12:04:29 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2014-04-11 12:04:29 +0000 |
| commit | d326c811170f304ffcf6d4362996cf4317b3f0f2 (patch) | |
| tree | c4a139f6140fc293e0a2367171ddf2f139738596 /compiler-rt | |
| parent | 962b38e4f3b416e93161bd4cb42cd15231ed243a (diff) | |
| download | bcm5719-llvm-d326c811170f304ffcf6d4362996cf4317b3f0f2.tar.gz bcm5719-llvm-d326c811170f304ffcf6d4362996cf4317b3f0f2.zip | |
[msan] mprotect() more memory to detect user code outside of application range.
llvm-svn: 206028
Diffstat (limited to 'compiler-rt')
| -rw-r--r-- | compiler-rt/lib/msan/msan.cc | 5 | ||||
| -rw-r--r-- | compiler-rt/lib/msan/msan_linux.cc | 6 |
2 files changed, 6 insertions, 5 deletions
diff --git a/compiler-rt/lib/msan/msan.cc b/compiler-rt/lib/msan/msan.cc index 7f15f4a722b..f5d6bf45798 100644 --- a/compiler-rt/lib/msan/msan.cc +++ b/compiler-rt/lib/msan/msan.cc @@ -299,9 +299,8 @@ void __msan_init() { __msan_clear_on_return(); if (__msan_get_track_origins()) VPrintf(1, "msan_track_origins\n"); - if (!InitShadow(/* prot1 */ false, /* prot2 */ true, /* map_shadow */ true, - __msan_get_track_origins())) { - // FIXME: prot1 = false is only required when running under DR. + if (!InitShadow(/* prot1 */ !msan_running_under_dr, /* prot2 */ true, + /* map_shadow */ true, __msan_get_track_origins())) { Printf("FATAL: MemorySanitizer can not mmap the shadow memory.\n"); Printf("FATAL: Make sure to compile with -fPIE and to link with -pie.\n"); Printf("FATAL: Disabling ASLR is known to cause this error.\n"); diff --git a/compiler-rt/lib/msan/msan_linux.cc b/compiler-rt/lib/msan/msan_linux.cc index 9a40279293d..2582ee27ab8 100644 --- a/compiler-rt/lib/msan/msan_linux.cc +++ b/compiler-rt/lib/msan/msan_linux.cc @@ -39,7 +39,7 @@ static const uptr kMemBeg = 0x600000000000; static const uptr kMemEnd = 0x7fffffffffff; static const uptr kShadowBeg = MEM_TO_SHADOW(kMemBeg); static const uptr kShadowEnd = MEM_TO_SHADOW(kMemEnd); -static const uptr kBad1Beg = 0x100000000; // 4G +static const uptr kBad1Beg = 0; static const uptr kBad1End = kShadowBeg - 1; static const uptr kBad2Beg = kShadowEnd + 1; static const uptr kBad2End = kMemBeg - 1; @@ -61,7 +61,9 @@ bool InitShadow(bool prot1, bool prot2, bool map_shadow, bool init_origins) { VPrintf(1, "Bad1 : %p %p\n", kBad1Beg, kBad1End); if (!MemoryRangeIsAvailable(kShadowBeg, - init_origins ? kOriginsEnd : kShadowEnd)) { + init_origins ? kOriginsEnd : kShadowEnd) || + (prot1 && !MemoryRangeIsAvailable(kBad1Beg, kBad1End)) || + (prot2 && !MemoryRangeIsAvailable(kBad2Beg, kBad2End))) { Printf("FATAL: Shadow memory range is not available.\n"); return false; } |
