diff options
| author | Walter Lee <waltl@google.com> | 2017-11-13 14:02:27 +0000 |
|---|---|---|
| committer | Walter Lee <waltl@google.com> | 2017-11-13 14:02:27 +0000 |
| commit | f8005d62ca3331389e2bb9489710e177ba94da74 (patch) | |
| tree | 4b23b3724779ccbb9a6618bf2c6119d308215a84 /CMakeLists.txt | |
| parent | 1ad28c758255a9594220c5210bbc6fed26e6da07 (diff) | |
[asan] Add CMake hook to override shadow scale in compiler_rt
Allow user to override shadow scale in compiler_rt by passing
-DCOMPILER_RT_ASAN_SHADOW_SCALE=n to CMake. Propagate the override
shadow scale value via a compiler define to compiler-rt and asan
tests. Tests will use the define to partially disable unsupported
tests. Set "-mllvm -asan-mapping-scale=<n>" for compiler_rt tests.
Differential Revision: https://reviews.llvm.org/D39469
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@318038 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index adb40f292..efb14b1e8 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -43,6 +43,25 @@ mark_as_advanced(COMPILER_RT_BUILD_PROFILE) option(COMPILER_RT_BUILD_XRAY_NO_PREINIT "Build xray with no preinit patching" OFF) mark_as_advanced(COMPILER_RT_BUILD_XRAY_NO_PREINIT) +set(COMPILER_RT_ASAN_SHADOW_SCALE "" + CACHE STRING "Override the shadow scale to be used in ASan runtime") + +if (NOT COMPILER_RT_ASAN_SHADOW_SCALE STREQUAL "") + # Check that the shadow scale value is valid. + if (NOT (COMPILER_RT_ASAN_SHADOW_SCALE GREATER -1 AND + COMPILER_RT_ASAN_SHADOW_SCALE LESS 8)) + message(FATAL_ERROR " + Invalid ASan Shadow Scale '${COMPILER_RT_ASAN_SHADOW_SCALE}'.") + endif() + + set(COMPILER_RT_ASAN_SHADOW_SCALE_LLVM_FLAG + -mllvm -asan-mapping-scale=${COMPILER_RT_ASAN_SHADOW_SCALE}) + set(COMPILER_RT_ASAN_SHADOW_SCALE_DEFINITION + ASAN_SHADOW_SCALE=${COMPILER_RT_ASAN_SHADOW_SCALE}) + set(COMPILER_RT_ASAN_SHADOW_SCALE_FLAG + -D${COMPILER_RT_ASAN_SHADOW_SCALE_DEFINITION}) +endif() + set(COMPILER_RT_BAREMETAL_BUILD OFF CACHE BOOLEAN "Build for a bare-metal target.") |