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[libFuzzer] Always build libFuzzer 

There are two reasons why users might want to build libfuzzer:
- To fuzz LLVM itself
- To get the libFuzzer.a archive file, so that they can attach it to their code
This change always builds libfuzzer, and supports the second use case if the specified flag is set.

The point of this patch is to have something that can potentially be shipped with the compiler, and this also ensures that the version of libFuzzer is correct to use with that compiler.

Patch by George Karpenkov.

Differential Revision: https://reviews.llvm.org/D32096

llvm-svn: 301010
This commit is contained in:
Kuba Mracek 2017-04-21 17:47:44 +00:00
parent 428b36671c
commit a0ab8c2e40
1 changed files with 20 additions and 14 deletions
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34
llvm/lib/Fuzzer/CMakeLists.txt
View File

@ -11,17 +11,14 @@ if( NOT HAS_THREAD_LOCAL )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Dthread_local=__thread")
endif()
set(LIBFUZZER_FLAGS_BASE "${CMAKE_CXX_FLAGS}")
# Disable the coverage and sanitizer instrumentation for the fuzzer itself.
set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fno-sanitize-coverage=trace-pc-guard,edge,trace-cmp,indirect-calls,8bit-counters -Werror")
if( LLVM_USE_SANITIZE_COVERAGE )
if(NOT "${LLVM_USE_SANITIZER}" STREQUAL "Address")
message(FATAL_ERROR
"LibFuzzer and its tests require LLVM_USE_SANITIZER=Address and "
"LLVM_USE_SANITIZE_COVERAGE=YES to be set."
)
endif()
add_library(LLVMFuzzerNoMainObjects OBJECT
set(LIBFUZZER_FLAGS_BASE "${CMAKE_CXX_FLAGS}")
# Disable the coverage and sanitizer instrumentation for the fuzzer itself.
set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fno-sanitize-coverage=trace-pc-guard,edge,trace-cmp,indirect-calls,8bit-counters -Werror")
endif()
add_library(LLVMFuzzerNoMainObjects OBJECT
FuzzerCrossOver.cpp
FuzzerDriver.cpp
FuzzerExtFunctionsDlsym.cpp
@ -45,15 +42,24 @@ if( LLVM_USE_SANITIZE_COVERAGE )
FuzzerUtilPosix.cpp
FuzzerUtilWindows.cpp
)
add_library(LLVMFuzzerNoMain STATIC
add_library(LLVMFuzzerNoMain STATIC
$<TARGET_OBJECTS:LLVMFuzzerNoMainObjects>
)
target_link_libraries(LLVMFuzzerNoMain ${LLVM_PTHREAD_LIB})
add_library(LLVMFuzzer STATIC
target_link_libraries(LLVMFuzzerNoMain ${LLVM_PTHREAD_LIB})
add_library(LLVMFuzzer STATIC
FuzzerMain.cpp
$<TARGET_OBJECTS:LLVMFuzzerNoMainObjects>
)
target_link_libraries(LLVMFuzzer ${LLVM_PTHREAD_LIB})
target_link_libraries(LLVMFuzzer ${LLVM_PTHREAD_LIB})
if( LLVM_USE_SANITIZE_COVERAGE )
if(NOT "${LLVM_USE_SANITIZER}" STREQUAL "Address")
message(FATAL_ERROR
"LibFuzzer tests require LLVM_USE_SANITIZER=Address and "
"LLVM_USE_SANITIZE_COVERAGE=YES to be set."
)
endif()
if( LLVM_INCLUDE_TESTS )
add_subdirectory(test)