diff options
| author | Marcos Pividori <mpividori@google.com> | 2017-02-02 23:01:41 +0000 |
|---|---|---|
| committer | Marcos Pividori <mpividori@google.com> | 2017-02-02 23:01:41 +0000 |
| commit | e1b9a6cf921f5c81b6253e6cf8531082b9857fae (patch) | |
| tree | 2d3273d417ab8dcb4c81a7aa7b627d6b559b5a26 /lib/asan/CMakeLists.txt | |
| parent | ca2b8ef1e0ae392ffcb5b7357ec9eed92deec865 (diff) | |
[sanitizer] Add dynamic_runtime_thunk for different sanitizers.
In Windows, when the sanitizer is implemented as a shared library (DLL), we need
an auxiliary static library dynamic_runtime_thunk that will be linked to the
main executable and dlls.
In the sanitizer DLL, we are exposing weak functions with WIN_WEAK_EXPORT_DEF(),
which exports the default implementation with __dll suffix. For example: for
sanitizer coverage, the default implementation of __sanitizer_cov_trace_cmp is
exported as: __sanitizer_cov_trace_cmp__dll.
In the dynamic_runtime_thunk static library, we include weak aliases to the
imported implementation from the dll, using the macro WIN_WEAK_IMPORT_DEF().
By default, all users's programs that include calls to weak functions like
__sanitizer_cov_trace_cmp, will be redirected to the implementation in the dll,
when linking to dynamic_runtime_thunk.
After this diff, we are able to compile code with sanitizer coverage
instrumentation on Windows. When the instrumented object files are linked with
clang-rt_asan_dynamic_runtime_thunk-arch.lib all the weak symbols will be
resolved to the implementation imported from asan dll.
All the files sanitizer_dynamic_runtime_thunk.cc are independent, so we do not
need to include a specific list of sanitizers.
Now, we compile: [asan|ubsan|sanitizer_coverage]_win_dynamic_runtime_thunk.cc
and sanitizer_win_dynamic_runtime_thunk.cc to generate
asan_dynamic_runtime_thunk.lib, because we include asan, ubsan and sanitizer
coverage in the address sanitizer library.
Differential Revision: https://reviews.llvm.org/D29158
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@293953 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/asan/CMakeLists.txt')
| -rw-r--r-- | lib/asan/CMakeLists.txt | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/asan/CMakeLists.txt b/lib/asan/CMakeLists.txt index 0aab373d2..d45884512 100644 --- a/lib/asan/CMakeLists.txt +++ b/lib/asan/CMakeLists.txt @@ -223,18 +223,28 @@ else() SOURCES $<TARGET_OBJECTS:RTInterception.${arch}> PARENT_TARGET asan) - set(DYNAMIC_RUNTIME_THUNK_CFLAGS "-DASAN_DYNAMIC_RUNTIME_THUNK") + set(DYNAMIC_RUNTIME_THUNK_CFLAGS "-DSANITIZER_DYNAMIC_RUNTIME_THUNK") if(MSVC) list(APPEND DYNAMIC_RUNTIME_THUNK_CFLAGS "-Zl") elseif(CMAKE_C_COMPILER_ID MATCHES Clang) list(APPEND DYNAMIC_RUNTIME_THUNK_CFLAGS "-nodefaultlibs") endif() + add_compiler_rt_object_libraries(AsanDynamicRuntimeThunk + ${SANITIZER_COMMON_SUPPORTED_OS} + ARCHS ${ASAN_SUPPORTED_ARCH} + SOURCES asan_globals_win.cc + asan_win_dynamic_runtime_thunk.cc + CFLAGS ${ASAN_CFLAGS} ${DYNAMIC_RUNTIME_THUNK_CFLAGS} + DEFS ${ASAN_COMMON_DEFINITIONS}) + add_compiler_rt_runtime(clang_rt.asan_dynamic_runtime_thunk STATIC ARCHS ${arch} - SOURCES asan_win_dynamic_runtime_thunk.cc - asan_globals_win.cc + OBJECT_LIBS AsanDynamicRuntimeThunk + UbsanDynamicRuntimeThunk + SancovDynamicRuntimeThunk + SanitizerCommonDynamicRuntimeThunk CFLAGS ${ASAN_CFLAGS} ${DYNAMIC_RUNTIME_THUNK_CFLAGS} DEFS ${ASAN_COMMON_DEFINITIONS} PARENT_TARGET asan) |