mirror of
https://github.com/AFLplusplus/AFLplusplus.git
synced 2025-06-23 06:28:51 +00:00
LTO: sancov made default, deprecated SKIPSINGLEBLOCK, deactivate LTO autodict for cmplog binaries
This commit is contained in:
@ -10,8 +10,14 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
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### Version ++2.67d (develop)
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### Version ++2.67d (develop)
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- Further llvm 12 support (fast moving target like afl++ :-) )
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- afl-fuzz:
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- Fix for auto dictionary not to throw out a -x dictionary
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- Fix for auto dictionary entries found during fuzzing to not throw out
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a -x dictionary
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- llvm_mode:
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- Ported SanCov to LTO, and made it the default for LTO. better
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instrumentation locations
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- Further llvm 12 support (fast moving target like afl++ :-) )
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- deprecated LLVM SKIPSINGLEBLOCK env environment
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### Version ++2.67c (release)
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### Version ++2.67c (release)
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@ -274,7 +274,7 @@ ifeq "$(TEST_MMAP)" "1"
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LDFLAGS += -Wno-deprecated-declarations
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LDFLAGS += -Wno-deprecated-declarations
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endif
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endif
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PROGS = ../afl-clang-fast ../afl-llvm-pass.so ../afl-ld-lto ../afl-llvm-lto-instrumentlist.so ../afl-llvm-lto-instrumentation.so ../afl-llvm-lto-instrim.so ../libLLVMInsTrim.so ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o ../compare-transform-pass.so ../split-compares-pass.so ../split-switches-pass.so ../cmplog-routines-pass.so ../cmplog-instructions-pass.so ../SanitizerCoverageLTO.so
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PROGS = ../afl-clang-fast ../afl-llvm-pass.so ../afl-ld-lto ../afl-llvm-lto-instrumentlist.so ../afl-llvm-lto-instrumentation.so ../libLLVMInsTrim.so ../afl-llvm-rt.o ../afl-llvm-rt-32.o ../afl-llvm-rt-64.o ../compare-transform-pass.so ../split-compares-pass.so ../split-switches-pass.so ../cmplog-routines-pass.so ../cmplog-instructions-pass.so ../SanitizerCoverageLTO.so
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# If prerequisites are not given, warn, do not build anything, and exit with code 0
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# If prerequisites are not given, warn, do not build anything, and exit with code 0
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ifeq "$(LLVMVER)" ""
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ifeq "$(LLVMVER)" ""
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@ -374,11 +374,6 @@ ifeq "$(LLVM_LTO)" "1"
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@$(CLANG_BIN) $(CFLAGS_SAFE) -Wno-unused-result -O0 $(AFL_CLANG_FLTO) -m32 -fPIC -c afl-llvm-rt-lto.o.c -o ../afl-llvm-rt-lto-32.o 2>/dev/null; if [ "$$?" = "0" ]; then : ; fi
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@$(CLANG_BIN) $(CFLAGS_SAFE) -Wno-unused-result -O0 $(AFL_CLANG_FLTO) -m32 -fPIC -c afl-llvm-rt-lto.o.c -o ../afl-llvm-rt-lto-32.o 2>/dev/null; if [ "$$?" = "0" ]; then : ; fi
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endif
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endif
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../afl-llvm-lto-instrim.so: afl-llvm-lto-instrim.so.cc afl-llvm-common.o
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ifeq "$(LLVM_LTO)" "1"
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$(CXX) $(CLANG_CPPFL) -DLLVMInsTrim_EXPORTS -Wno-writable-strings -fno-rtti -fPIC -std=$(LLVM_STDCXX) -shared $< MarkNodes.cc -o $@ $(CLANG_LFL) afl-llvm-common.o
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endif
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# laf
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# laf
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../split-switches-pass.so: split-switches-pass.so.cc afl-llvm-common.o | test_deps
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../split-switches-pass.so: split-switches-pass.so.cc afl-llvm-common.o | test_deps
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$(CXX) $(CLANG_CPPFL) -shared $< -o $@ $(CLANG_LFL) afl-llvm-common.o
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$(CXX) $(CLANG_CPPFL) -shared $< -o $@ $(CLANG_LFL) afl-llvm-common.o
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@ -427,7 +422,7 @@ all_done: test_build
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install: all
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install: all
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install -d -m 755 $${DESTDIR}$(BIN_PATH) $${DESTDIR}$(HELPER_PATH) $${DESTDIR}$(DOC_PATH) $${DESTDIR}$(MISC_PATH)
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install -d -m 755 $${DESTDIR}$(BIN_PATH) $${DESTDIR}$(HELPER_PATH) $${DESTDIR}$(DOC_PATH) $${DESTDIR}$(MISC_PATH)
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if [ -f ../afl-clang-fast -a -f ../libLLVMInsTrim.so -a -f ../afl-llvm-rt.o ]; then set -e; install -m 755 ../afl-clang-fast $${DESTDIR}$(BIN_PATH); ln -sf afl-clang-fast $${DESTDIR}$(BIN_PATH)/afl-clang-fast++; install -m 755 ../libLLVMInsTrim.so ../afl-llvm-pass.so ../afl-llvm-rt.o $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-clang-fast -a -f ../libLLVMInsTrim.so -a -f ../afl-llvm-rt.o ]; then set -e; install -m 755 ../afl-clang-fast $${DESTDIR}$(BIN_PATH); ln -sf afl-clang-fast $${DESTDIR}$(BIN_PATH)/afl-clang-fast++; install -m 755 ../libLLVMInsTrim.so ../afl-llvm-pass.so ../afl-llvm-rt.o $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-clang-lto ]; then set -e; ln -sf afl-clang-fast $${DESTDIR}$(BIN_PATH)/afl-clang-lto; ln -sf afl-clang-fast $${DESTDIR}$(BIN_PATH)/afl-clang-lto++; install -m 755 ../afl-llvm-lto-instrumentation.so ../afl-llvm-lto-instrim.so ../afl-llvm-rt-lto*.o ../afl-llvm-lto-instrumentlist.so $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-clang-lto ]; then set -e; ln -sf afl-clang-fast $${DESTDIR}$(BIN_PATH)/afl-clang-lto; ln -sf afl-clang-fast $${DESTDIR}$(BIN_PATH)/afl-clang-lto++; install -m 755 ../afl-llvm-lto-instrumentation.so ../afl-llvm-rt-lto*.o ../afl-llvm-lto-instrumentlist.so $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-ld-lto ]; then set -e; install -m 755 ../afl-ld-lto $${DESTDIR}$(BIN_PATH); fi
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if [ -f ../afl-ld-lto ]; then set -e; install -m 755 ../afl-ld-lto $${DESTDIR}$(BIN_PATH); fi
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if [ -f ../afl-llvm-rt-32.o ]; then set -e; install -m 755 ../afl-llvm-rt-32.o $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-llvm-rt-32.o ]; then set -e; install -m 755 ../afl-llvm-rt-32.o $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-llvm-rt-64.o ]; then set -e; install -m 755 ../afl-llvm-rt-64.o $${DESTDIR}$(HELPER_PATH); fi
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if [ -f ../afl-llvm-rt-64.o ]; then set -e; install -m 755 ../afl-llvm-rt-64.o $${DESTDIR}$(HELPER_PATH); fi
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@ -132,10 +132,6 @@ struct InsTrim : public ModulePass {
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}
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}
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if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") ||
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getenv("AFL_LLVM_SKIPSINGLEBLOCK"))
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function_minimum_size = 2;
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unsigned int PrevLocSize = 0;
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unsigned int PrevLocSize = 0;
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char * ngram_size_str = getenv("AFL_LLVM_NGRAM_SIZE");
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char * ngram_size_str = getenv("AFL_LLVM_NGRAM_SIZE");
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if (!ngram_size_str) ngram_size_str = getenv("AFL_NGRAM_SIZE");
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if (!ngram_size_str) ngram_size_str = getenv("AFL_NGRAM_SIZE");
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@ -425,6 +425,8 @@ bool ModuleSanitizerCoverage::instrumentModule(
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if ((afl_global_id = atoi(ptr)) < 0)
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if ((afl_global_id = atoi(ptr)) < 0)
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FATAL("AFL_LLVM_LTO_STARTID value of \"%s\" is negative\n", ptr);
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FATAL("AFL_LLVM_LTO_STARTID value of \"%s\" is negative\n", ptr);
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if (getenv("AFL_LLVM_CMPLOG")) autodictionary = 0;
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if ((ptr = getenv("AFL_LLVM_DOCUMENT_IDS")) != NULL) {
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if ((ptr = getenv("AFL_LLVM_DOCUMENT_IDS")) != NULL) {
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if ((documentFile = fopen(ptr, "a")) == NULL)
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if ((documentFile = fopen(ptr, "a")) == NULL)
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@ -347,11 +347,6 @@ static void edit_params(u32 argc, char **argv, char **envp) {
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if (lto_mode) {
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if (lto_mode) {
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if (cmplog_mode)
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unsetenv("AFL_LLVM_LTO_AUTODICTIONARY");
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else
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setenv("AFL_LLVM_LTO_AUTODICTIONARY", "1", 1);
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#if defined(AFL_CLANG_LDPATH) && LLVM_VERSION_MAJOR >= 12
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#if defined(AFL_CLANG_LDPATH) && LLVM_VERSION_MAJOR >= 12
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u8 *ld_ptr = strrchr(AFL_REAL_LD, '/');
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u8 *ld_ptr = strrchr(AFL_REAL_LD, '/');
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if (!ld_ptr) ld_ptr = "ld.lld";
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if (!ld_ptr) ld_ptr = "ld.lld";
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@ -753,7 +748,13 @@ int main(int argc, char **argv, char **envp) {
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if (strncasecmp(ptr, "afl", strlen("afl")) == 0 ||
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if (strncasecmp(ptr, "afl", strlen("afl")) == 0 ||
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strncasecmp(ptr, "classic", strlen("classic")) == 0) {
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strncasecmp(ptr, "classic", strlen("classic")) == 0) {
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if (!instrument_mode || instrument_mode == INSTRUMENT_AFL)
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if (instrument_mode == INSTRUMENT_LTO) {
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instrument_mode = INSTRUMENT_CLASSIC;
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lto_mode = 1;
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} else if (!instrument_mode || instrument_mode == INSTRUMENT_AFL)
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instrument_mode = INSTRUMENT_AFL;
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instrument_mode = INSTRUMENT_AFL;
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else
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else
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FATAL("main instrumentation mode already set with %s",
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FATAL("main instrumentation mode already set with %s",
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@ -845,7 +846,7 @@ int main(int argc, char **argv, char **envp) {
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callname = "afl-clang-lto";
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callname = "afl-clang-lto";
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if (!instrument_mode) {
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if (!instrument_mode) {
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instrument_mode = INSTRUMENT_LTO;
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instrument_mode = INSTRUMENT_CFG;
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ptr = instrument_mode_string[instrument_mode];
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ptr = instrument_mode_string[instrument_mode];
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}
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}
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@ -1,951 +0,0 @@
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/*
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american fuzzy lop++ - LLVM-mode instrumentation pass
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---------------------------------------------------
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Copyright 2019-2020 AFLplusplus Project. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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This library is plugged into LLVM when invoking clang through afl-clang-fast
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or afl-clang-lto with AFL_LLVM_INSTRUMENT=CFG or =INSTRIM
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*/
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#define AFL_LLVM_PASS
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/time.h>
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#include <unordered_set>
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#include <list>
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#include <string>
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#include <fstream>
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#include <set>
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#include "llvm/Config/llvm-config.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/CFG.h"
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#include "llvm/IR/Dominators.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Transforms/IPO/PassManagerBuilder.h"
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#include "llvm/Transforms/Utils/BasicBlockUtils.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/Analysis/MemorySSAUpdater.h"
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#include "llvm/Analysis/ValueTracking.h"
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#include "MarkNodes.h"
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#include "afl-llvm-common.h"
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#include "config.h"
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#include "debug.h"
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using namespace llvm;
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static cl::opt<bool> MarkSetOpt("markset", cl::desc("MarkSet"),
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cl::init(false));
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static cl::opt<bool> LoopHeadOpt("loophead", cl::desc("LoopHead"),
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cl::init(false));
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namespace {
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struct InsTrimLTO : public ModulePass {
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protected:
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uint32_t function_minimum_size = 1;
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char * skip_nozero = NULL;
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int afl_global_id = 1, autodictionary = 1;
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uint32_t inst_blocks = 0, inst_funcs = 0;
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uint64_t map_addr = 0x10000;
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public:
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static char ID;
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InsTrimLTO() : ModulePass(ID) {
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char *ptr;
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if (getenv("AFL_DEBUG")) debug = 1;
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if ((ptr = getenv("AFL_LLVM_LTO_STARTID")) != NULL)
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if ((afl_global_id = atoi(ptr)) < 0 || afl_global_id >= MAP_SIZE)
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FATAL("AFL_LLVM_LTO_STARTID value of \"%s\" is not between 0 and %d\n",
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|
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ptr, MAP_SIZE - 1);
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|
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skip_nozero = getenv("AFL_LLVM_SKIP_NEVERZERO");
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|
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|
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}
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|
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|
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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|
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|
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ModulePass::getAnalysisUsage(AU);
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|
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AU.addRequired<DominatorTreeWrapperPass>();
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|
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AU.addRequired<LoopInfoWrapperPass>();
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|
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|
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}
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|
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|
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StringRef getPassName() const override {
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|
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|
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return "InstTrim LTO Instrumentation";
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|
||||||
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|
||||||
}
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|
||||||
|
|
||||||
bool runOnModule(Module &M) override {
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|
||||||
|
|
||||||
char be_quiet = 0;
|
|
||||||
char * ptr;
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|
||||||
uint32_t locations = 0, functions = 0;
|
|
||||||
|
|
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setvbuf(stdout, NULL, _IONBF, 0);
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|
||||||
|
|
||||||
if ((isatty(2) && !getenv("AFL_QUIET")) || getenv("AFL_DEBUG") != NULL) {
|
|
||||||
|
|
||||||
SAYF(cCYA "InsTrimLTO" VERSION cRST
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|
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" by csienslab and Marc \"vanHauser\" Heuse\n");
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|
||||||
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|
||||||
} else
|
|
||||||
|
|
||||||
be_quiet = 1;
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|
||||||
|
|
||||||
/* Process environment variables */
|
|
||||||
|
|
||||||
if (getenv("AFL_LLVM_MAP_DYNAMIC")) map_addr = 0;
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|
||||||
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|
||||||
if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) {
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|
||||||
|
|
||||||
uint64_t val;
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|
||||||
if (!*ptr || !strcmp(ptr, "0") || !strcmp(ptr, "0x0")) {
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|
||||||
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||||||
map_addr = 0;
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|
||||||
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|
||||||
} else if (map_addr == 0) {
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|
||||||
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|
||||||
FATAL(
|
|
||||||
"AFL_LLVM_MAP_ADDR and AFL_LLVM_MAP_DYNAMIC cannot be used "
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|
||||||
"together");
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|
||||||
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|
||||||
} else if (strncmp(ptr, "0x", 2) != 0) {
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|
||||||
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||||||
map_addr = 0x10000; // the default
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||||||
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||||||
} else {
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||||||
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||||||
val = strtoull(ptr, NULL, 16);
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if (val < 0x100 || val > 0xffffffff00000000) {
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||||||
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FATAL(
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||||||
"AFL_LLVM_MAP_ADDR must be a value between 0x100 and "
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"0xffffffff00000000");
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||||||
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||||||
}
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||||||
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map_addr = val;
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}
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||||||
}
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if (debug) { fprintf(stderr, "map address is %lu\n", map_addr); }
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||||||
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||||||
if (getenv("AFL_LLVM_INSTRIM_LOOPHEAD") != NULL ||
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||||||
getenv("LOOPHEAD") != NULL) {
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LoopHeadOpt = true;
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||||||
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||||||
}
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||||||
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|
||||||
if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") ||
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|
||||||
getenv("AFL_LLVM_SKIPSINGLEBLOCK"))
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|
||||||
function_minimum_size = 2;
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|
||||||
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|
||||||
// this is our default
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|
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MarkSetOpt = true;
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|
||||||
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|
||||||
/* Initialize LLVM instrumentation */
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|
||||||
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|
||||||
LLVMContext & C = M.getContext();
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|
||||||
std::vector<std::string> dictionary;
|
|
||||||
std::vector<CallInst *> calls;
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|
||||||
DenseMap<Value *, std::string *> valueMap;
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|
||||||
|
|
||||||
IntegerType *Int8Ty = IntegerType::getInt8Ty(C);
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|
||||||
IntegerType *Int32Ty = IntegerType::getInt32Ty(C);
|
|
||||||
IntegerType *Int64Ty = IntegerType::getInt64Ty(C);
|
|
||||||
|
|
||||||
ConstantInt *Zero = ConstantInt::get(Int8Ty, 0);
|
|
||||||
ConstantInt *One = ConstantInt::get(Int8Ty, 1);
|
|
||||||
|
|
||||||
/* Get/set globals for the SHM region. */
|
|
||||||
|
|
||||||
GlobalVariable *AFLMapPtr = NULL;
|
|
||||||
Value * MapPtrFixed = NULL;
|
|
||||||
|
|
||||||
if (!map_addr) {
|
|
||||||
|
|
||||||
AFLMapPtr =
|
|
||||||
new GlobalVariable(M, PointerType::get(Int8Ty, 0), false,
|
|
||||||
GlobalValue::ExternalLinkage, 0, "__afl_area_ptr");
|
|
||||||
|
|
||||||
} else {
|
|
||||||
|
|
||||||
ConstantInt *MapAddr = ConstantInt::get(Int64Ty, map_addr);
|
|
||||||
MapPtrFixed =
|
|
||||||
ConstantExpr::getIntToPtr(MapAddr, PointerType::getUnqual(Int8Ty));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (autodictionary) {
|
|
||||||
|
|
||||||
/* Some implementation notes.
|
|
||||||
*
|
|
||||||
* We try to handle 3 cases:
|
|
||||||
* - memcmp("foo", arg, 3) <- literal string
|
|
||||||
* - static char globalvar[] = "foo";
|
|
||||||
* memcmp(globalvar, arg, 3) <- global variable
|
|
||||||
* - char localvar[] = "foo";
|
|
||||||
* memcmp(locallvar, arg, 3) <- local variable
|
|
||||||
*
|
|
||||||
* The local variable case is the hardest. We can only detect that
|
|
||||||
* case if there is no reassignment or change in the variable.
|
|
||||||
* And it might not work across llvm version.
|
|
||||||
* What we do is hooking the initializer function for local variables
|
|
||||||
* (llvm.memcpy.p0i8.p0i8.i64) and note the string and the assigned
|
|
||||||
* variable. And if that variable is then used in a compare function
|
|
||||||
* we use that noted string.
|
|
||||||
* This seems not to work for tokens that have a size <= 4 :-(
|
|
||||||
*
|
|
||||||
* - if the compared length is smaller than the string length we
|
|
||||||
* save the full string. This is likely better for fuzzing but
|
|
||||||
* might be wrong in a few cases depending on optimizers
|
|
||||||
*
|
|
||||||
* - not using StringRef because there is a bug in the llvm 11
|
|
||||||
* checkout I am using which sometimes points to wrong strings
|
|
||||||
*
|
|
||||||
* Over and out. Took me a full day. damn. mh/vh
|
|
||||||
*/
|
|
||||||
|
|
||||||
for (Function &F : M) {
|
|
||||||
|
|
||||||
for (auto &BB : F) {
|
|
||||||
|
|
||||||
for (auto &IN : BB) {
|
|
||||||
|
|
||||||
CallInst *callInst = nullptr;
|
|
||||||
|
|
||||||
if ((callInst = dyn_cast<CallInst>(&IN))) {
|
|
||||||
|
|
||||||
bool isStrcmp = true;
|
|
||||||
bool isMemcmp = true;
|
|
||||||
bool isStrncmp = true;
|
|
||||||
bool isStrcasecmp = true;
|
|
||||||
bool isStrncasecmp = true;
|
|
||||||
bool isIntMemcpy = true;
|
|
||||||
bool addedNull = false;
|
|
||||||
uint8_t optLen = 0;
|
|
||||||
|
|
||||||
Function *Callee = callInst->getCalledFunction();
|
|
||||||
if (!Callee) continue;
|
|
||||||
if (callInst->getCallingConv() != llvm::CallingConv::C) continue;
|
|
||||||
std::string FuncName = Callee->getName().str();
|
|
||||||
isStrcmp &= !FuncName.compare("strcmp");
|
|
||||||
isMemcmp &= !FuncName.compare("memcmp");
|
|
||||||
isStrncmp &= !FuncName.compare("strncmp");
|
|
||||||
isStrcasecmp &= !FuncName.compare("strcasecmp");
|
|
||||||
isStrncasecmp &= !FuncName.compare("strncasecmp");
|
|
||||||
isIntMemcpy &= !FuncName.compare("llvm.memcpy.p0i8.p0i8.i64");
|
|
||||||
|
|
||||||
if (!isStrcmp && !isMemcmp && !isStrncmp && !isStrcasecmp &&
|
|
||||||
!isStrncasecmp && !isIntMemcpy)
|
|
||||||
continue;
|
|
||||||
|
|
||||||
/* Verify the strcmp/memcmp/strncmp/strcasecmp/strncasecmp
|
|
||||||
* function prototype */
|
|
||||||
FunctionType *FT = Callee->getFunctionType();
|
|
||||||
|
|
||||||
isStrcmp &= FT->getNumParams() == 2 &&
|
|
||||||
FT->getReturnType()->isIntegerTy(32) &&
|
|
||||||
FT->getParamType(0) == FT->getParamType(1) &&
|
|
||||||
FT->getParamType(0) ==
|
|
||||||
IntegerType::getInt8PtrTy(M.getContext());
|
|
||||||
isStrcasecmp &= FT->getNumParams() == 2 &&
|
|
||||||
FT->getReturnType()->isIntegerTy(32) &&
|
|
||||||
FT->getParamType(0) == FT->getParamType(1) &&
|
|
||||||
FT->getParamType(0) ==
|
|
||||||
IntegerType::getInt8PtrTy(M.getContext());
|
|
||||||
isMemcmp &= FT->getNumParams() == 3 &&
|
|
||||||
FT->getReturnType()->isIntegerTy(32) &&
|
|
||||||
FT->getParamType(0)->isPointerTy() &&
|
|
||||||
FT->getParamType(1)->isPointerTy() &&
|
|
||||||
FT->getParamType(2)->isIntegerTy();
|
|
||||||
isStrncmp &= FT->getNumParams() == 3 &&
|
|
||||||
FT->getReturnType()->isIntegerTy(32) &&
|
|
||||||
FT->getParamType(0) == FT->getParamType(1) &&
|
|
||||||
FT->getParamType(0) ==
|
|
||||||
IntegerType::getInt8PtrTy(M.getContext()) &&
|
|
||||||
FT->getParamType(2)->isIntegerTy();
|
|
||||||
isStrncasecmp &= FT->getNumParams() == 3 &&
|
|
||||||
FT->getReturnType()->isIntegerTy(32) &&
|
|
||||||
FT->getParamType(0) == FT->getParamType(1) &&
|
|
||||||
FT->getParamType(0) ==
|
|
||||||
IntegerType::getInt8PtrTy(M.getContext()) &&
|
|
||||||
FT->getParamType(2)->isIntegerTy();
|
|
||||||
|
|
||||||
if (!isStrcmp && !isMemcmp && !isStrncmp && !isStrcasecmp &&
|
|
||||||
!isStrncasecmp && !isIntMemcpy)
|
|
||||||
continue;
|
|
||||||
|
|
||||||
/* is a str{n,}{case,}cmp/memcmp, check if we have
|
|
||||||
* str{case,}cmp(x, "const") or str{case,}cmp("const", x)
|
|
||||||
* strn{case,}cmp(x, "const", ..) or strn{case,}cmp("const", x,
|
|
||||||
* ..) memcmp(x, "const", ..) or memcmp("const", x, ..) */
|
|
||||||
Value *Str1P = callInst->getArgOperand(0),
|
|
||||||
*Str2P = callInst->getArgOperand(1);
|
|
||||||
std::string Str1, Str2;
|
|
||||||
StringRef TmpStr;
|
|
||||||
bool HasStr1 = getConstantStringInfo(Str1P, TmpStr);
|
|
||||||
if (TmpStr.empty())
|
|
||||||
HasStr1 = false;
|
|
||||||
else
|
|
||||||
Str1 = TmpStr.str();
|
|
||||||
bool HasStr2 = getConstantStringInfo(Str2P, TmpStr);
|
|
||||||
if (TmpStr.empty())
|
|
||||||
HasStr2 = false;
|
|
||||||
else
|
|
||||||
Str2 = TmpStr.str();
|
|
||||||
|
|
||||||
if (debug)
|
|
||||||
fprintf(stderr, "F:%s %p(%s)->\"%s\"(%s) %p(%s)->\"%s\"(%s)\n",
|
|
||||||
FuncName.c_str(), Str1P, Str1P->getName().str().c_str(),
|
|
||||||
Str1.c_str(), HasStr1 == true ? "true" : "false", Str2P,
|
|
||||||
Str2P->getName().str().c_str(), Str2.c_str(),
|
|
||||||
HasStr2 == true ? "true" : "false");
|
|
||||||
|
|
||||||
// we handle the 2nd parameter first because of llvm memcpy
|
|
||||||
if (!HasStr2) {
|
|
||||||
|
|
||||||
auto *Ptr = dyn_cast<ConstantExpr>(Str2P);
|
|
||||||
if (Ptr && Ptr->isGEPWithNoNotionalOverIndexing()) {
|
|
||||||
|
|
||||||
if (auto *Var =
|
|
||||||
dyn_cast<GlobalVariable>(Ptr->getOperand(0))) {
|
|
||||||
|
|
||||||
if (Var->hasInitializer()) {
|
|
||||||
|
|
||||||
if (auto *Array = dyn_cast<ConstantDataArray>(
|
|
||||||
Var->getInitializer())) {
|
|
||||||
|
|
||||||
HasStr2 = true;
|
|
||||||
Str2 = Array->getAsString().str();
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// for the internal memcpy routine we only care for the second
|
|
||||||
// parameter and are not reporting anything.
|
|
||||||
if (isIntMemcpy == true) {
|
|
||||||
|
|
||||||
if (HasStr2 == true) {
|
|
||||||
|
|
||||||
Value * op2 = callInst->getArgOperand(2);
|
|
||||||
ConstantInt *ilen = dyn_cast<ConstantInt>(op2);
|
|
||||||
if (ilen) {
|
|
||||||
|
|
||||||
uint64_t literalLength = Str2.size();
|
|
||||||
uint64_t optLength = ilen->getZExtValue();
|
|
||||||
if (literalLength + 1 == optLength) {
|
|
||||||
|
|
||||||
Str2.append("\0", 1); // add null byte
|
|
||||||
addedNull = true;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
valueMap[Str1P] = new std::string(Str2);
|
|
||||||
|
|
||||||
if (debug)
|
|
||||||
fprintf(stderr, "Saved: %s for %p\n", Str2.c_str(), Str1P);
|
|
||||||
continue;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
continue;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// Neither a literal nor a global variable?
|
|
||||||
// maybe it is a local variable that we saved
|
|
||||||
if (!HasStr2) {
|
|
||||||
|
|
||||||
std::string *strng = valueMap[Str2P];
|
|
||||||
if (strng && !strng->empty()) {
|
|
||||||
|
|
||||||
Str2 = *strng;
|
|
||||||
HasStr2 = true;
|
|
||||||
if (debug)
|
|
||||||
fprintf(stderr, "Filled2: %s for %p\n", strng->c_str(),
|
|
||||||
Str2P);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!HasStr1) {
|
|
||||||
|
|
||||||
auto Ptr = dyn_cast<ConstantExpr>(Str1P);
|
|
||||||
|
|
||||||
if (Ptr && Ptr->isGEPWithNoNotionalOverIndexing()) {
|
|
||||||
|
|
||||||
if (auto *Var =
|
|
||||||
dyn_cast<GlobalVariable>(Ptr->getOperand(0))) {
|
|
||||||
|
|
||||||
if (Var->hasInitializer()) {
|
|
||||||
|
|
||||||
if (auto *Array = dyn_cast<ConstantDataArray>(
|
|
||||||
Var->getInitializer())) {
|
|
||||||
|
|
||||||
HasStr1 = true;
|
|
||||||
Str1 = Array->getAsString().str();
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// Neither a literal nor a global variable?
|
|
||||||
// maybe it is a local variable that we saved
|
|
||||||
if (!HasStr1) {
|
|
||||||
|
|
||||||
std::string *strng = valueMap[Str1P];
|
|
||||||
if (strng && !strng->empty()) {
|
|
||||||
|
|
||||||
Str1 = *strng;
|
|
||||||
HasStr1 = true;
|
|
||||||
if (debug)
|
|
||||||
fprintf(stderr, "Filled1: %s for %p\n", strng->c_str(),
|
|
||||||
Str1P);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* handle cases of one string is const, one string is variable */
|
|
||||||
if (!(HasStr1 ^ HasStr2)) continue;
|
|
||||||
|
|
||||||
std::string thestring;
|
|
||||||
|
|
||||||
if (HasStr1)
|
|
||||||
thestring = Str1;
|
|
||||||
else
|
|
||||||
thestring = Str2;
|
|
||||||
|
|
||||||
optLen = thestring.length();
|
|
||||||
|
|
||||||
if (isMemcmp || isStrncmp || isStrncasecmp) {
|
|
||||||
|
|
||||||
Value * op2 = callInst->getArgOperand(2);
|
|
||||||
ConstantInt *ilen = dyn_cast<ConstantInt>(op2);
|
|
||||||
if (ilen) {
|
|
||||||
|
|
||||||
uint64_t literalLength = optLen;
|
|
||||||
optLen = ilen->getZExtValue();
|
|
||||||
if (literalLength + 1 == optLen) { // add null byte
|
|
||||||
thestring.append("\0", 1);
|
|
||||||
addedNull = true;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// add null byte if this is a string compare function and a null
|
|
||||||
// was not already added
|
|
||||||
if (addedNull == false && !isMemcmp) {
|
|
||||||
|
|
||||||
thestring.append("\0", 1); // add null byte
|
|
||||||
optLen++;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!be_quiet) {
|
|
||||||
|
|
||||||
std::string outstring;
|
|
||||||
fprintf(stderr, "%s: length %u/%u \"", FuncName.c_str(), optLen,
|
|
||||||
(unsigned int)thestring.length());
|
|
||||||
for (uint8_t i = 0; i < thestring.length(); i++) {
|
|
||||||
|
|
||||||
uint8_t c = thestring[i];
|
|
||||||
if (c <= 32 || c >= 127)
|
|
||||||
fprintf(stderr, "\\x%02x", c);
|
|
||||||
else
|
|
||||||
fprintf(stderr, "%c", c);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
fprintf(stderr, "\"\n");
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// we take the longer string, even if the compare was to a
|
|
||||||
// shorter part. Note that depending on the optimizer of the
|
|
||||||
// compiler this can be wrong, but it is more likely that this
|
|
||||||
// is helping the fuzzer
|
|
||||||
if (optLen != thestring.length()) optLen = thestring.length();
|
|
||||||
if (optLen > MAX_AUTO_EXTRA) optLen = MAX_AUTO_EXTRA;
|
|
||||||
if (optLen < MIN_AUTO_EXTRA) // too short? skip
|
|
||||||
continue;
|
|
||||||
|
|
||||||
dictionary.push_back(thestring.substr(0, optLen));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* InsTrim instrumentation starts here */
|
|
||||||
|
|
||||||
u64 total_rs = 0;
|
|
||||||
u64 total_hs = 0;
|
|
||||||
|
|
||||||
for (Function &F : M) {
|
|
||||||
|
|
||||||
if (debug) {
|
|
||||||
|
|
||||||
uint32_t bb_cnt = 0;
|
|
||||||
|
|
||||||
for (auto &BB : F)
|
|
||||||
if (BB.size() > 0) ++bb_cnt;
|
|
||||||
SAYF(cMGN "[D] " cRST "Function %s size %zu %u\n",
|
|
||||||
F.getName().str().c_str(), F.size(), bb_cnt);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// if the function below our minimum size skip it (1 or 2)
|
|
||||||
if (F.size() < function_minimum_size) continue;
|
|
||||||
if (isIgnoreFunction(&F)) continue;
|
|
||||||
|
|
||||||
functions++;
|
|
||||||
|
|
||||||
// the instrument file list check
|
|
||||||
AttributeList Attrs = F.getAttributes();
|
|
||||||
if (Attrs.hasAttribute(-1, StringRef("skipinstrument"))) {
|
|
||||||
|
|
||||||
if (debug)
|
|
||||||
fprintf(stderr,
|
|
||||||
"DEBUG: Function %s is not the instrument file listed\n",
|
|
||||||
F.getName().str().c_str());
|
|
||||||
continue;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
std::unordered_set<BasicBlock *> MS;
|
|
||||||
if (!MarkSetOpt) {
|
|
||||||
|
|
||||||
for (auto &BB : F) {
|
|
||||||
|
|
||||||
MS.insert(&BB);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
total_rs += F.size();
|
|
||||||
|
|
||||||
} else {
|
|
||||||
|
|
||||||
auto Result = markNodes(&F);
|
|
||||||
auto RS = Result.first;
|
|
||||||
auto HS = Result.second;
|
|
||||||
|
|
||||||
MS.insert(RS.begin(), RS.end());
|
|
||||||
if (!LoopHeadOpt) {
|
|
||||||
|
|
||||||
MS.insert(HS.begin(), HS.end());
|
|
||||||
total_rs += MS.size();
|
|
||||||
|
|
||||||
} else {
|
|
||||||
|
|
||||||
DenseSet<std::pair<BasicBlock *, BasicBlock *>> EdgeSet;
|
|
||||||
DominatorTreeWrapperPass * DTWP =
|
|
||||||
&getAnalysis<DominatorTreeWrapperPass>(F);
|
|
||||||
auto DT = &DTWP->getDomTree();
|
|
||||||
|
|
||||||
total_rs += RS.size();
|
|
||||||
total_hs += HS.size();
|
|
||||||
|
|
||||||
for (BasicBlock *BB : HS) {
|
|
||||||
|
|
||||||
bool Inserted = false;
|
|
||||||
for (auto BI = pred_begin(BB), BE = pred_end(BB); BI != BE; ++BI) {
|
|
||||||
|
|
||||||
auto Edge = BasicBlockEdge(*BI, BB);
|
|
||||||
if (Edge.isSingleEdge() && DT->dominates(Edge, BB)) {
|
|
||||||
|
|
||||||
EdgeSet.insert({*BI, BB});
|
|
||||||
Inserted = true;
|
|
||||||
break;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!Inserted) {
|
|
||||||
|
|
||||||
MS.insert(BB);
|
|
||||||
total_rs += 1;
|
|
||||||
total_hs -= 1;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
for (auto I = EdgeSet.begin(), E = EdgeSet.end(); I != E; ++I) {
|
|
||||||
|
|
||||||
auto PredBB = I->first;
|
|
||||||
auto SuccBB = I->second;
|
|
||||||
auto NewBB = SplitBlockPredecessors(SuccBB, {PredBB}, ".split", DT,
|
|
||||||
nullptr, nullptr, false);
|
|
||||||
MS.insert(NewBB);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
for (BasicBlock &BB : F) {
|
|
||||||
|
|
||||||
auto PI = pred_begin(&BB);
|
|
||||||
auto PE = pred_end(&BB);
|
|
||||||
IRBuilder<> IRB(&*BB.getFirstInsertionPt());
|
|
||||||
Value * L = NULL;
|
|
||||||
|
|
||||||
if (MarkSetOpt && MS.find(&BB) == MS.end()) { continue; }
|
|
||||||
|
|
||||||
if (PI == PE) {
|
|
||||||
|
|
||||||
L = ConstantInt::get(Int32Ty, afl_global_id++);
|
|
||||||
locations++;
|
|
||||||
|
|
||||||
} else {
|
|
||||||
|
|
||||||
auto *PN = PHINode::Create(Int32Ty, 0, "", &*BB.begin());
|
|
||||||
DenseMap<BasicBlock *, unsigned> PredMap;
|
|
||||||
for (auto PI = pred_begin(&BB), PE = pred_end(&BB); PI != PE; ++PI) {
|
|
||||||
|
|
||||||
BasicBlock *PBB = *PI;
|
|
||||||
auto It = PredMap.insert({PBB, afl_global_id++});
|
|
||||||
unsigned Label = It.first->second;
|
|
||||||
PN->addIncoming(ConstantInt::get(Int32Ty, Label), PBB);
|
|
||||||
locations++;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
L = PN;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Load SHM pointer */
|
|
||||||
Value *MapPtrIdx;
|
|
||||||
|
|
||||||
if (map_addr) {
|
|
||||||
|
|
||||||
MapPtrIdx = IRB.CreateGEP(MapPtrFixed, L);
|
|
||||||
|
|
||||||
} else {
|
|
||||||
|
|
||||||
LoadInst *MapPtr = IRB.CreateLoad(AFLMapPtr);
|
|
||||||
MapPtr->setMetadata(M.getMDKindID("nosanitize"),
|
|
||||||
MDNode::get(C, None));
|
|
||||||
MapPtrIdx = IRB.CreateGEP(MapPtr, L);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Update bitmap */
|
|
||||||
LoadInst *Counter = IRB.CreateLoad(MapPtrIdx);
|
|
||||||
Counter->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None));
|
|
||||||
|
|
||||||
Value *Incr = IRB.CreateAdd(Counter, One);
|
|
||||||
|
|
||||||
if (skip_nozero == NULL) {
|
|
||||||
|
|
||||||
auto cf = IRB.CreateICmpEQ(Incr, Zero);
|
|
||||||
auto carry = IRB.CreateZExt(cf, Int8Ty);
|
|
||||||
Incr = IRB.CreateAdd(Incr, carry);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
IRB.CreateStore(Incr, MapPtrIdx)
|
|
||||||
->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None));
|
|
||||||
|
|
||||||
// done :)
|
|
||||||
|
|
||||||
inst_blocks++;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// save highest location ID to global variable
|
|
||||||
// do this after each function to fail faster
|
|
||||||
if (!be_quiet && afl_global_id > MAP_SIZE &&
|
|
||||||
afl_global_id > FS_OPT_MAX_MAPSIZE) {
|
|
||||||
|
|
||||||
uint32_t pow2map = 1, map = afl_global_id;
|
|
||||||
while ((map = map >> 1))
|
|
||||||
pow2map++;
|
|
||||||
WARNF(
|
|
||||||
"We have %u blocks to instrument but the map size is only %u. Either "
|
|
||||||
"edit config.h and set MAP_SIZE_POW2 from %u to %u, then recompile "
|
|
||||||
"afl-fuzz and llvm_mode and then make this target - or set "
|
|
||||||
"AFL_MAP_SIZE with at least size %u when running afl-fuzz with this "
|
|
||||||
"target.",
|
|
||||||
afl_global_id, MAP_SIZE, MAP_SIZE_POW2, pow2map, afl_global_id);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!getenv("AFL_LLVM_LTO_DONTWRITEID") || dictionary.size() || map_addr) {
|
|
||||||
|
|
||||||
// yes we could create our own function, insert it into ctors ...
|
|
||||||
// but this would be a pain in the butt ... so we use afl-llvm-rt-lto.o
|
|
||||||
|
|
||||||
Function *f = M.getFunction("__afl_auto_init_globals");
|
|
||||||
|
|
||||||
if (!f) {
|
|
||||||
|
|
||||||
fprintf(stderr,
|
|
||||||
"Error: init function could not be found (this should not "
|
|
||||||
"happen)\n");
|
|
||||||
exit(-1);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
BasicBlock *bb = &f->getEntryBlock();
|
|
||||||
if (!bb) {
|
|
||||||
|
|
||||||
fprintf(stderr,
|
|
||||||
"Error: init function does not have an EntryBlock (this should "
|
|
||||||
"not happen)\n");
|
|
||||||
exit(-1);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
BasicBlock::iterator IP = bb->getFirstInsertionPt();
|
|
||||||
IRBuilder<> IRB(&(*IP));
|
|
||||||
|
|
||||||
if (map_addr) {
|
|
||||||
|
|
||||||
GlobalVariable *AFLMapAddrFixed =
|
|
||||||
new GlobalVariable(M, Int64Ty, true, GlobalValue::ExternalLinkage,
|
|
||||||
0, "__afl_map_addr");
|
|
||||||
ConstantInt *MapAddr = ConstantInt::get(Int64Ty, map_addr);
|
|
||||||
StoreInst * StoreMapAddr = IRB.CreateStore(MapAddr, AFLMapAddrFixed);
|
|
||||||
StoreMapAddr->setMetadata(M.getMDKindID("nosanitize"),
|
|
||||||
MDNode::get(C, None));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (getenv("AFL_LLVM_LTO_DONTWRITEID") == NULL) {
|
|
||||||
|
|
||||||
uint32_t write_loc = afl_global_id;
|
|
||||||
|
|
||||||
if (afl_global_id % 8) write_loc = (((afl_global_id + 8) >> 3) << 3);
|
|
||||||
|
|
||||||
GlobalVariable *AFLFinalLoc =
|
|
||||||
new GlobalVariable(M, Int32Ty, true, GlobalValue::ExternalLinkage,
|
|
||||||
0, "__afl_final_loc");
|
|
||||||
ConstantInt *const_loc = ConstantInt::get(Int32Ty, write_loc);
|
|
||||||
StoreInst * StoreFinalLoc = IRB.CreateStore(const_loc, AFLFinalLoc);
|
|
||||||
StoreFinalLoc->setMetadata(M.getMDKindID("nosanitize"),
|
|
||||||
MDNode::get(C, None));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (dictionary.size()) {
|
|
||||||
|
|
||||||
size_t memlen = 0, count = 0, offset = 0;
|
|
||||||
char * ptr;
|
|
||||||
|
|
||||||
for (auto token : dictionary) {
|
|
||||||
|
|
||||||
memlen += token.length();
|
|
||||||
count++;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!be_quiet)
|
|
||||||
printf("AUTODICTIONARY: %lu string%s found\n", count,
|
|
||||||
count == 1 ? "" : "s");
|
|
||||||
|
|
||||||
if (count) {
|
|
||||||
|
|
||||||
if ((ptr = (char *)malloc(memlen + count)) == NULL) {
|
|
||||||
|
|
||||||
fprintf(stderr, "Error: malloc for %lu bytes failed!\n",
|
|
||||||
memlen + count);
|
|
||||||
exit(-1);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
count = 0;
|
|
||||||
|
|
||||||
for (auto token : dictionary) {
|
|
||||||
|
|
||||||
if (offset + token.length() < 0xfffff0 && count < MAX_AUTO_EXTRAS) {
|
|
||||||
|
|
||||||
ptr[offset++] = (uint8_t)token.length();
|
|
||||||
memcpy(ptr + offset, token.c_str(), token.length());
|
|
||||||
offset += token.length();
|
|
||||||
count++;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
GlobalVariable *AFLDictionaryLen = new GlobalVariable(
|
|
||||||
M, Int32Ty, false, GlobalValue::ExternalLinkage, 0,
|
|
||||||
"__afl_dictionary_len");
|
|
||||||
ConstantInt *const_len = ConstantInt::get(Int32Ty, offset);
|
|
||||||
StoreInst * StoreDictLen =
|
|
||||||
IRB.CreateStore(const_len, AFLDictionaryLen);
|
|
||||||
StoreDictLen->setMetadata(M.getMDKindID("nosanitize"),
|
|
||||||
MDNode::get(C, None));
|
|
||||||
|
|
||||||
ArrayType *ArrayTy = ArrayType::get(IntegerType::get(C, 8), offset);
|
|
||||||
GlobalVariable *AFLInternalDictionary = new GlobalVariable(
|
|
||||||
M, ArrayTy, true, GlobalValue::ExternalLinkage,
|
|
||||||
ConstantDataArray::get(
|
|
||||||
C, *(new ArrayRef<char>((char *)ptr, offset))),
|
|
||||||
"__afl_internal_dictionary");
|
|
||||||
AFLInternalDictionary->setInitializer(ConstantDataArray::get(
|
|
||||||
C, *(new ArrayRef<char>((char *)ptr, offset))));
|
|
||||||
AFLInternalDictionary->setConstant(true);
|
|
||||||
|
|
||||||
GlobalVariable *AFLDictionary = new GlobalVariable(
|
|
||||||
M, PointerType::get(Int8Ty, 0), false,
|
|
||||||
GlobalValue::ExternalLinkage, 0, "__afl_dictionary");
|
|
||||||
|
|
||||||
Value *AFLDictOff = IRB.CreateGEP(AFLInternalDictionary, Zero);
|
|
||||||
Value *AFLDictPtr =
|
|
||||||
IRB.CreatePointerCast(AFLDictOff, PointerType::get(Int8Ty, 0));
|
|
||||||
StoreInst *StoreDict = IRB.CreateStore(AFLDictPtr, AFLDictionary);
|
|
||||||
StoreDict->setMetadata(M.getMDKindID("nosanitize"),
|
|
||||||
MDNode::get(C, None));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// count basic blocks for comparison with classic instrumentation
|
|
||||||
|
|
||||||
u32 edges = 0;
|
|
||||||
for (auto &F : M) {
|
|
||||||
|
|
||||||
if (F.size() < function_minimum_size) continue;
|
|
||||||
|
|
||||||
for (auto &BB : F) {
|
|
||||||
|
|
||||||
bool would_instrument = false;
|
|
||||||
|
|
||||||
for (BasicBlock *Pred : predecessors(&BB)) {
|
|
||||||
|
|
||||||
int count = 0;
|
|
||||||
for (BasicBlock *Succ : successors(Pred))
|
|
||||||
if (Succ != NULL) count++;
|
|
||||||
|
|
||||||
if (count > 1) would_instrument = true;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if (would_instrument == true) edges++;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Say something nice. */
|
|
||||||
|
|
||||||
if (!be_quiet) {
|
|
||||||
|
|
||||||
if (!inst_blocks)
|
|
||||||
WARNF("No instrumentation targets found.");
|
|
||||||
else {
|
|
||||||
|
|
||||||
char modeline[100];
|
|
||||||
snprintf(modeline, sizeof(modeline), "%s%s%s%s%s",
|
|
||||||
getenv("AFL_HARDEN") ? "hardened" : "non-hardened",
|
|
||||||
getenv("AFL_USE_ASAN") ? ", ASAN" : "",
|
|
||||||
getenv("AFL_USE_MSAN") ? ", MSAN" : "",
|
|
||||||
getenv("AFL_USE_CFISAN") ? ", CFISAN" : "",
|
|
||||||
getenv("AFL_USE_UBSAN") ? ", UBSAN" : "");
|
|
||||||
OKF("Instrumented %u locations for %u edges in %u functions (%llu, "
|
|
||||||
"%llu) with no collisions (on "
|
|
||||||
"average %llu collisions would be in afl-gcc/afl-clang-fast for %u "
|
|
||||||
"edges) (%s mode).",
|
|
||||||
inst_blocks, locations, functions, total_rs, total_hs,
|
|
||||||
calculateCollisions(edges), edges, modeline);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
return true;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}; // end of struct InsTrim
|
|
||||||
|
|
||||||
} // end of anonymous namespace
|
|
||||||
|
|
||||||
char InsTrimLTO::ID = 0;
|
|
||||||
|
|
||||||
static void registerInsTrimLTO(const PassManagerBuilder &,
|
|
||||||
legacy::PassManagerBase &PM) {
|
|
||||||
|
|
||||||
PM.add(new InsTrimLTO());
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
static RegisterPass<InsTrimLTO> X("afl-lto-instrim",
|
|
||||||
"afl++ InsTrim LTO instrumentation pass",
|
|
||||||
false, false);
|
|
||||||
|
|
||||||
static RegisterStandardPasses RegisterInsTrimLTO(
|
|
||||||
PassManagerBuilder::EP_FullLinkTimeOptimizationLast, registerInsTrimLTO);
|
|
||||||
|
|
@ -128,6 +128,8 @@ bool AFLLTOPass::runOnModule(Module &M) {
|
|||||||
|
|
||||||
be_quiet = 1;
|
be_quiet = 1;
|
||||||
|
|
||||||
|
if (getenv("AFL_LLVM_CMPLOG")) autodictionary = 0;
|
||||||
|
|
||||||
if ((ptr = getenv("AFL_LLVM_DOCUMENT_IDS")) != NULL) {
|
if ((ptr = getenv("AFL_LLVM_DOCUMENT_IDS")) != NULL) {
|
||||||
|
|
||||||
if ((documentFile = fopen(ptr, "a")) == NULL)
|
if ((documentFile = fopen(ptr, "a")) == NULL)
|
||||||
@ -142,8 +144,6 @@ bool AFLLTOPass::runOnModule(Module &M) {
|
|||||||
/*if (getenv("AFL_LLVM_MAP_DYNAMIC"))*/
|
/*if (getenv("AFL_LLVM_MAP_DYNAMIC"))*/
|
||||||
map_addr = 0;
|
map_addr = 0;
|
||||||
|
|
||||||
if (getenv("AFL_LLVM_SKIPSINGLEBLOCK")) function_minimum_size = 2;
|
|
||||||
|
|
||||||
if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) {
|
if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) {
|
||||||
|
|
||||||
uint64_t val;
|
uint64_t val;
|
||||||
|
@ -182,10 +182,6 @@ bool AFLCoverage::runOnModule(Module &M) {
|
|||||||
#endif
|
#endif
|
||||||
skip_nozero = getenv("AFL_LLVM_SKIP_NEVERZERO");
|
skip_nozero = getenv("AFL_LLVM_SKIP_NEVERZERO");
|
||||||
|
|
||||||
if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") ||
|
|
||||||
getenv("AFL_LLVM_SKIPSINGLEBLOCK"))
|
|
||||||
function_minimum_size = 2;
|
|
||||||
|
|
||||||
unsigned PrevLocSize = 0;
|
unsigned PrevLocSize = 0;
|
||||||
|
|
||||||
char *ngram_size_str = getenv("AFL_LLVM_NGRAM_SIZE");
|
char *ngram_size_str = getenv("AFL_LLVM_NGRAM_SIZE");
|
||||||
|
Reference in New Issue
Block a user