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[LibFuzzer] Allow LibFuzzer to be built in modes other than RELEASE.

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Previously the flags were only being set correctly when the
build type was "Release". Now the build should work properly
for all the supported build types. When building libFuzzer
the optimization level respects whatever is used for the
rest of LLVM but for the LibFuzzer tests we force -O0.

Differential Revision: http://reviews.llvm.org/D20558

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270912 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Liew 2016-05-26 20:55:05 +00:00
parent 429d7a4cff
commit b82cddc56f
7 changed files with 37 additions and 14 deletions
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4
lib/Fuzzer/CMakeLists.txt
View File

@ -1,6 +1,6 @@
set(LIBFUZZER_FLAGS_BASE "${CMAKE_CXX_FLAGS_RELEASE}")
set(LIBFUZZER_FLAGS_BASE "${CMAKE_CXX_FLAGS}")
# Disable the coverage and sanitizer instrumentation for the fuzzer itself.
set(CMAKE_CXX_FLAGS_RELEASE "${LIBFUZZER_FLAGS_BASE} -O2 -fno-sanitize=all -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters -Werror")
set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fno-sanitize=all -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters -Werror")
if( LLVM_USE_SANITIZE_COVERAGE )
add_library(LLVMFuzzerNoMainObjects OBJECT
FuzzerCrossOver.cpp

29
lib/Fuzzer/test/CMakeLists.txt
View File

@ -1,8 +1,31 @@
# Build all these tests with -O0, otherwise optimizations may merge some
# basic blocks and we'll fail to discover the targets.
# Also enable the coverage instrumentation back (it is disabled
# for the Fuzzer lib)
set(CMAKE_CXX_FLAGS_RELEASE "${LIBFUZZER_FLAGS_BASE} -O0 -fsanitize-coverage=edge,indirect-calls")
# We change the flags for every build type because we might be doing
# a multi-configuration build (e.g. Xcode) where CMAKE_BUILD_TYPE doesn't
# mean anything.
set(variables_to_filter
CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_DEBUG
CMAKE_CXX_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS_MINSIZEREL
LIBFUZZER_FLAGS_BASE
)
foreach (VARNAME ${variables_to_filter})
string(REPLACE " " ";" BUILD_FLAGS_AS_LIST "${${VARNAME}}")
set(new_flags "")
foreach (flag ${BUILD_FLAGS_AS_LIST})
# NOTE: Use of XX here is to avoid a CMake warning due to CMP0054
if (NOT ("XX${flag}" MATCHES "XX-O[0123s]"))
set(new_flags "${new_flags} ${flag}")
else()
set(new_flags "${new_flags} -O0")
endif()
endforeach()
set(${VARNAME} "${new_flags}")
endforeach()
# Enable the coverage instrumentation (it is disabled for the Fuzzer lib).
set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fsanitize-coverage=edge,indirect-calls")
set(DFSanTests
MemcmpTest

4
lib/Fuzzer/test/dfsan/CMakeLists.txt
View File

@ -1,7 +1,7 @@
# These tests depend on both coverage and dfsan instrumentation.
set(CMAKE_CXX_FLAGS_RELEASE
"${LIBFUZZER_FLAGS_BASE} -O0 -fno-sanitize=all -fsanitize=dataflow")
set(CMAKE_CXX_FLAGS
"${LIBFUZZER_FLAGS_BASE} -fno-sanitize=all -fsanitize=dataflow")
foreach(Test ${DFSanTests})
add_executable(LLVMFuzzer-${Test}-DFSan

2
lib/Fuzzer/test/trace-bb/CMakeLists.txt
View File

@ -1,6 +1,6 @@
# These tests are not instrumented with coverage.
set(CMAKE_CXX_FLAGS_RELEASE
set(CMAKE_CXX_FLAGS
"${LIBFUZZER_FLAGS_BASE} -fsanitize-coverage=edge,trace-bb")
foreach(Test ${TraceBBTests})

4
lib/Fuzzer/test/trace-pc/CMakeLists.txt
View File

@ -1,7 +1,7 @@
# These tests are not instrumented with coverage.
set(CMAKE_CXX_FLAGS_RELEASE
"${LIBFUZZER_FLAGS_BASE} -O0 -fno-sanitize-coverage=8bit-counters -fsanitize-coverage=trace-pc")
set(CMAKE_CXX_FLAGS
"${LIBFUZZER_FLAGS_BASE} -fno-sanitize-coverage=8bit-counters -fsanitize-coverage=trace-pc")
foreach(Test ${TracePCTests})
add_executable(LLVMFuzzer-${Test}-TracePC

4
lib/Fuzzer/test/ubsan/CMakeLists.txt
View File

@ -1,7 +1,7 @@
# These tests are instrumented with ubsan in non-recovery mode.
set(CMAKE_CXX_FLAGS_RELEASE
"${LIBFUZZER_FLAGS_BASE} -O0 -fsanitize=undefined -fno-sanitize-recover=all")
set(CMAKE_CXX_FLAGS
"${LIBFUZZER_FLAGS_BASE} -fsanitize=undefined -fno-sanitize-recover=all")
foreach(Test ${UbsanTests})
add_executable(LLVMFuzzer-${Test}-Ubsan

4
lib/Fuzzer/test/uninstrumented/CMakeLists.txt
View File

@ -1,7 +1,7 @@
# These tests are not instrumented with coverage.
set(CMAKE_CXX_FLAGS_RELEASE
"${LIBFUZZER_FLAGS_BASE} -O0 -fno-sanitize=all -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters")
set(CMAKE_CXX_FLAGS
"${LIBFUZZER_FLAGS_BASE} -fno-sanitize=all -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters")
foreach(Test ${UninstrumentedTests})
add_executable(LLVMFuzzer-${Test}-Uninstrumented