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aflpp_debug

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This commit is contained in:
van Hauser
2020-06-06 11:45:08 +02:00
parent c036108b59
commit 372206e159
3 changed files with 34 additions and 3 deletions
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10
examples/aflpp_driver/GNUmakefile
View File

@ -17,6 +17,11 @@ aflpp_driver.o: aflpp_driver.cpp
libAFLDriver.a: aflpp_driver.o
ar ru libAFLDriver.a aflpp_driver.o
debug:
$(LLVM_BINDIR)clang++ -D_DEBUG=\"1\" $(FLAGS) -stdlib=libc++ -funroll-loops -std=c++11 -c aflpp_driver.cpp
ar ru libAFLDriver.a aflpp_driver.o
aflpp_qemu_driver.o: aflpp_qemu_driver.c
$(LLVM_BINDIR)clang $(FLAGS) -O0 -funroll-loops -c aflpp_qemu_driver.c
@ -29,5 +34,8 @@ aflpp_qemu_driver_hook.so: aflpp_qemu_driver_hook.o
aflpp_qemu_driver_hook.o: aflpp_qemu_driver_hook.c
$(LLVM_BINDIR)clang -fPIC $(FLAGS) -funroll-loops -c aflpp_qemu_driver_hook.c
test: libAFLDriver.a aflpp_driver_test.cpp
afl-clang-fast++ -Wl,--allow-multiple-definition -stdlib=libc++ -funroll-loops -std=c++11 -o aflpp_driver_test aflpp_driver_test.cpp libAFLDriver.a
clean:
rm -f *.o libAFLDriver*.a libAFLQemuDriver.a aflpp_qemu_driver_hook.so *~ core
rm -f *.o libAFLDriver*.a libAFLQemuDriver.a aflpp_qemu_driver_hook.so *~ core aflpp_driver_test

7
examples/aflpp_driver/aflpp_driver.cpp
View File

@ -246,7 +246,8 @@ int main(int argc, char **argv) {
LLVMFuzzerInitialize(&argc, &argv);
// Do any other expensive one-time initialization here.
int N = 1000;
uint8_t dummy_input[1] = {0};
int N = 100000;
if (argc == 2 && argv[1][0] == '-')
N = atoi(argv[1] + 1);
else if(argc == 2 && (N = atoi(argv[1])) > 0)
@ -267,11 +268,13 @@ int main(int argc, char **argv) {
// Call LLVMFuzzerTestOneInput here so that coverage caused by initialization
// on the first execution of LLVMFuzzerTestOneInput is ignored.
uint8_t dummy_input[1] = {0};
LLVMFuzzerTestOneInput(dummy_input, 1);
int num_runs = 0;
while (__afl_persistent_loop(N)) {
#ifdef _DEBUG
fprintf(stderr, "len: %u\n", *__afl_fuzz_len);
#endif
if (*__afl_fuzz_len) {
num_runs++;
LLVMFuzzerTestOneInput(__afl_fuzz_ptr, *__afl_fuzz_len);

20
examples/aflpp_driver/aflpp_driver_test.cpp Normal file
View File

@ -0,0 +1,20 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
fprintf(stderr, "Received size %lu\n", Size);
if (Size < 4)
return 0;
if (Data[0] == 'F')
if (Data[1] == 'A')
if (Data[2] == '$')
if (Data[3] == '$')
abort();
return 0;
}