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fix LTO mode

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This commit is contained in:
van Hauser
2020-05-05 20:10:54 +02:00
parent a38980c80b
commit 00683d06c2
3 changed files with 9 additions and 13 deletions
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3
TODO.md
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@ -2,7 +2,8 @@
## Roadmap 2.65+ ## Roadmap 2.65+
- AFL_MAP_SIZE for afl-llvm-pass, qemu_mode and unicorn_mode - InsTrim mode for LTO solution
- AFL_MAP_SIZE for qemu_mode and unicorn_mode
- random crc32 HASH_CONST per run? because with 65536 paths we have collisions - random crc32 HASH_CONST per run? because with 65536 paths we have collisions
- namespace for targets? e.g. network - namespace for targets? e.g. network
- libradamsa as a custom module? - libradamsa as a custom module?

16
llvm_mode/afl-llvm-lto-instrumentation.so.cc
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@ -690,8 +690,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
if (map_addr) { if (map_addr) {
GlobalVariable *AFLMapAddrFixed = new GlobalVariable( GlobalVariable *AFLMapAddrFixed = new GlobalVariable(
M, Int64Ty, true, GlobalValue::ExternalLinkage, 0, "__afl_map_addr", M, Int64Ty, true, GlobalValue::ExternalLinkage, 0, "__afl_map_addr");
0, GlobalVariable::GeneralDynamicTLSModel, 0, false);
ConstantInt *MapAddr = ConstantInt::get(Int64Ty, map_addr); ConstantInt *MapAddr = ConstantInt::get(Int64Ty, map_addr);
StoreInst * StoreMapAddr = IRB.CreateStore(MapAddr, AFLMapAddrFixed); StoreInst * StoreMapAddr = IRB.CreateStore(MapAddr, AFLMapAddrFixed);
StoreMapAddr->setMetadata(M.getMDKindID("nosanitize"), StoreMapAddr->setMetadata(M.getMDKindID("nosanitize"),
@ -706,8 +705,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
if (afl_global_id % 8) write_loc = (((afl_global_id + 8) >> 3) << 3); if (afl_global_id % 8) write_loc = (((afl_global_id + 8) >> 3) << 3);
GlobalVariable *AFLFinalLoc = new GlobalVariable( GlobalVariable *AFLFinalLoc = new GlobalVariable(
M, Int32Ty, true, GlobalValue::ExternalLinkage, 0, "__afl_final_loc", M, Int32Ty, true, GlobalValue::ExternalLinkage, 0, "__afl_final_loc");
0, GlobalVariable::GeneralDynamicTLSModel, 0, false);
ConstantInt *const_loc = ConstantInt::get(Int32Ty, write_loc); ConstantInt *const_loc = ConstantInt::get(Int32Ty, write_loc);
StoreInst * StoreFinalLoc = IRB.CreateStore(const_loc, AFLFinalLoc); StoreInst * StoreFinalLoc = IRB.CreateStore(const_loc, AFLFinalLoc);
StoreFinalLoc->setMetadata(M.getMDKindID("nosanitize"), StoreFinalLoc->setMetadata(M.getMDKindID("nosanitize"),
@ -756,10 +754,9 @@ bool AFLLTOPass::runOnModule(Module &M) {
} }
GlobalVariable *AFLDictionaryLen = new GlobalVariable( GlobalVariable *AFLDictionaryLen =
M, Int32Ty, false, GlobalValue::ExternalLinkage, 0, new GlobalVariable(M, Int32Ty, false, GlobalValue::ExternalLinkage,
"__afl_dictionary_len", 0, GlobalVariable::GeneralDynamicTLSModel, 0, "__afl_dictionary_len");
0, false);
ConstantInt *const_len = ConstantInt::get(Int32Ty, offset); ConstantInt *const_len = ConstantInt::get(Int32Ty, offset);
StoreInst *StoreDictLen = IRB.CreateStore(const_len, AFLDictionaryLen); StoreInst *StoreDictLen = IRB.CreateStore(const_len, AFLDictionaryLen);
StoreDictLen->setMetadata(M.getMDKindID("nosanitize"), StoreDictLen->setMetadata(M.getMDKindID("nosanitize"),
@ -770,8 +767,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
M, ArrayTy, true, GlobalValue::ExternalLinkage, M, ArrayTy, true, GlobalValue::ExternalLinkage,
ConstantDataArray::get(C, ConstantDataArray::get(C,
*(new ArrayRef<char>((char *)ptr, offset))), *(new ArrayRef<char>((char *)ptr, offset))),
"__afl_internal_dictionary", 0, "__afl_internal_dictionary");
GlobalVariable::GeneralDynamicTLSModel, 0, false);
AFLInternalDictionary->setInitializer(ConstantDataArray::get( AFLInternalDictionary->setInitializer(ConstantDataArray::get(
C, *(new ArrayRef<char>((char *)ptr, offset)))); C, *(new ArrayRef<char>((char *)ptr, offset))));
AFLInternalDictionary->setConstant(true); AFLInternalDictionary->setConstant(true);

3
llvm_mode/afl-llvm-pass.so.cc
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@ -583,8 +583,7 @@ bool AFLCoverage::runOnModule(Module &M) {
GlobalVariable *AFLFinalLoc = new GlobalVariable( GlobalVariable *AFLFinalLoc = new GlobalVariable(
M, Int32Ty, true, GlobalValue::ExternalLinkage, 0, M, Int32Ty, true, GlobalValue::ExternalLinkage, 0,
"__afl_final_loc", 0, GlobalVariable::GeneralDynamicTLSModel, 0, "__afl_final_loc");
false);
ConstantInt *const_loc = ConstantInt::get(Int32Ty, map_size); ConstantInt *const_loc = ConstantInt::get(Int32Ty, map_size);
StoreInst * StoreFinalLoc = IRB.CreateStore(const_loc, AFLFinalLoc); StoreInst * StoreFinalLoc = IRB.CreateStore(const_loc, AFLFinalLoc);
StoreFinalLoc->setMetadata(M.getMDKindID("nosanitize"), StoreFinalLoc->setMetadata(M.getMDKindID("nosanitize"),