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[sanitizer-coverage] fix a bug in trace-gep 

llvm-svn: 282467
This commit is contained in:
Kostya Serebryany 2016-09-27 01:55:08 +00:00
parent efc962cd06
commit 45c144754b
3 changed files with 10 additions and 2 deletions
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2
llvm/lib/Fuzzer/fuzzer-test-suite/openssl-1.0.1f/build.sh
View File

@ -7,7 +7,7 @@ LIBFUZZER_SRC=$(dirname $(dirname $SCRIPT_DIR))
JOBS=20
# FUZZ_CXXFLAGS=" -g -fsanitize=address -fsanitize-coverage=edge"
FUZZ_CXXFLAGS=" -g -fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp,trace-div"
FUZZ_CXXFLAGS=" -g -fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp,trace-div,trace-gep"
get() {
[ ! -e SRC ] && git clone https://github.com/openssl/openssl.git SRC && (cd SRC && git checkout OpenSSL_1_0_1f)

2
llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
View File

@ -599,7 +599,7 @@ void SanitizerCoverageModule::InjectTraceForGep(
for (auto GEP : GepTraceTargets) {
IRBuilder<> IRB(GEP);
for (auto I = GEP->idx_begin(); I != GEP->idx_end(); ++I)
if (!isa<ConstantInt>(*I))
if (!isa<ConstantInt>(*I) && (*I)->getType()->isIntegerTy())
IRB.CreateCall(SanCovTraceGepFunction,
{IRB.CreateIntCast(*I, IntptrTy, true)});
}

8
llvm/test/Instrumentation/SanitizerCoverage/gep-tracing.ll
View File

@ -30,3 +30,11 @@ entry:
; CHECK: call void @__sanitizer_cov_trace_gep(i64 %idxprom1)
; CHECK: call void @__sanitizer_cov_trace_gep(i64 %idxprom)
; CHECK: ret void
; Just make sure we don't insturment this one and don't crash
define void @gep_3(<2 x i8*> %a, i32 %i, i32 %j) {
entry:
%0 = getelementptr i8, <2 x i8*> %a, <2 x i64> <i64 8, i64 8>
ret void
}