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Merge pull request #1097 from devnexen/llvm_lto_inst_dict

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LLVM LTO plugin using smart pointer for __afl_internal_directory vari…
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van Hauser 2021-10-03 17:25:11 +02:00 committed by GitHub
commit 8bde2bb13e
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1 changed files with 6 additions and 11 deletions
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17
instrumentation/afl-llvm-lto-instrumentation.so.cc
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@ -28,6 +28,7 @@
#include <sys/time.h>
#include <list>
#include <memory>
#include <string>
#include <fstream>
#include <set>
@ -1015,13 +1016,7 @@ bool AFLLTOPass::runOnModule(Module &M) {
if (count) {
if ((ptr = (char *)malloc(memlen + count)) == NULL) {
fprintf(stderr, "Error: malloc for %zu bytes failed!\n",
memlen + count);
exit(-1);
}
auto ptrhld = std::unique_ptr<char []>(new char[memlen + count]);
count = 0;
@ -1030,8 +1025,8 @@ bool AFLLTOPass::runOnModule(Module &M) {
if (offset + token.length() < 0xfffff0 && count < MAX_AUTO_EXTRAS) {
ptr[offset++] = (uint8_t)token.length();
memcpy(ptr + offset, token.c_str(), token.length());
ptrhld.get()[offset++] = (uint8_t)token.length();
memcpy(ptrhld.get() + offset, token.c_str(), token.length());
offset += token.length();
count++;
@ -1051,10 +1046,10 @@ bool AFLLTOPass::runOnModule(Module &M) {
GlobalVariable *AFLInternalDictionary = new GlobalVariable(
M, ArrayTy, true, GlobalValue::ExternalLinkage,
ConstantDataArray::get(C,
*(new ArrayRef<char>((char *)ptr, offset))),
*(new ArrayRef<char>(ptrhld.get(), offset))),
"__afl_internal_dictionary");
AFLInternalDictionary->setInitializer(ConstantDataArray::get(
C, *(new ArrayRef<char>((char *)ptr, offset))));
C, *(new ArrayRef<char>(ptrhld.get(), offset))));
AFLInternalDictionary->setConstant(true);
GlobalVariable *AFLDictionary = new GlobalVariable(