better performance compilation options for afl++ and targets

GNUmakefile

@@ -51,11 +51,11 @@ endif
 endif
 
 ifneq "$(shell uname)" "Darwin"
- ifeq "$(shell echo 'int main() {return 0; }' | $(CC) $(CFLAGS) -Werror -x c - -march=native -o .test 2>/dev/null && echo 1 || echo 0 ; rm -f .test )" "1"
+ #ifeq "$(shell echo 'int main() {return 0; }' | $(CC) $(CFLAGS) -Werror -x c - -march=native -o .test 2>/dev/null && echo 1 || echo 0 ; rm -f .test )" "1"
-	CFLAGS_OPT += -march=native
+ #	CFLAGS_OPT += -march=native
- endif
+ #endif
  # OS X does not like _FORTIFY_SOURCE=2
-# CFLAGS_OPT += -D_FORTIFY_SOURCE=2
+ CFLAGS_OPT += -D_FORTIFY_SOURCE=2
 endif
 
 ifdef STATIC

TODO.md

@@ -9,6 +9,7 @@
  - learn from honggfuzz
  - for persistent mode, have a functionality that transports the test case
    via shared memory (and the int write to the FD from afl-fuzz is the size)
+ - CPU affinity for many cores?
 
 ## Further down the road
 

docs/Changelog.md

@@ -32,6 +32,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
     - fixed crash in compare-transform-pass when strcasecmp/strncasecmp was
       tried to be instrumented with LTO
     - fixed crash in cmplog with LTO
+  - slightly better performance compilation options for afl++ and targets
   - fixed afl-gcc/afl-as that could break on fast systems reusing pids in
     the same second
   - added lots of dictionaries from oss-fuzz, go-fuzz and Jakub Wilk

examples/aflpp_driver/GNUmakefile

@@ -0,0 +1,27 @@
+ifeq "" "$(LLVM_CONFIG)"
+  LLVM_CONFIG=llvm-config
+endif
+
+LLVM_BINDIR = $(shell $(LLVM_CONFIG) --bindir 2>/dev/null)
+ifneq "" "$(LLVM_BINDIR)"
+  LLVM_BINDIR := $(LLVM_BINDIR)/
+endif
+
+FLAGS=-O3 -funroll-loops
+
+all:	libAFLDriver.a libAFLDriver2.a
+
+aflpp_driver.o:	aflpp_driver.cpp
+	$(LLVM_BINDIR)clang++ $(FLAGS) -stdlib=libc++ -funroll-loops -std=c++11 -c aflpp_driver.cpp
+
+afl-llvm-rt.o:	../../llvm_mode/afl-llvm-rt.o.c
+	$(LLVM_BINDIR)clang $(FLAGS) -I../../include -c -o afl-llvm-rt.o ../../llvm_mode/afl-llvm-rt.o.c
+
+libAFLDriver.a:	aflpp_driver.o
+	ar ru libAFLDriver.a aflpp_driver.o
+
+libAFLDriver2.a:	aflpp_driver.o afl-llvm-rt.o
+	ar ru libAFLDriver2.a aflpp_driver.o afl-llvm-rt.o
+
+clean:
+	rm -f *.o libAFLDriver*.a *~ core

examples/aflpp_driver/Makefile

@@ -1,24 +1,2 @@
-ifeq "" "$(LLVM_CONFIG)"
+all:
-  LLVM_CONFIG=llvm-config
+	@gmake all || echo please install GNUmake
-endif
-
-LLVM_BINDIR = $(shell $(LLVM_CONFIG) --bindir 2>/dev/null)
-ifneq "" "$(LLVM_BINDIR)"
-  LLVM_BINDIR := $(LLVM_BINDIR)/
-endif
-
-
-
-all:	libAFLDriver.a
-
-aflpp_driver.o:	aflpp_driver.cpp
-	$(LLVM_BINDIR)clang++ -O3 -march=native -stdlib=libc++ -funroll-loops -std=c++11 -c aflpp_driver.cpp
-
-afl-llvm-rt.o:	../../llvm_mode/afl-llvm-rt.o.c
-	$(LLVM_BINDIR)clang++ -O3 -march=native -funroll-loops -stdlib=libc++ -std=c++11 -c aflpp_driver.cpp
-
-libAFLDriver.a:	aflpp_driver.o afl-llvm-rt.o
-	ar ru libAFLDriver.a aflpp_driver.o
-
-clean:
-	rm -f *.o libAFLDriver.a *~ core

llvm_mode/GNUmakefile

@@ -160,9 +160,9 @@ endif
 
 # After we set CC/CXX we can start makefile magic tests
 
-ifeq "$(shell echo 'int main() {return 0; }' | $(CC) -x c - -march=native -o .test 2>/dev/null && echo 1 || echo 0 ; rm -f .test )" "1"
+#ifeq "$(shell echo 'int main() {return 0; }' | $(CC) -x c - -march=native -o .test 2>/dev/null && echo 1 || echo 0 ; rm -f .test )" "1"
-	CFLAGS_OPT = -march=native
+#	CFLAGS_OPT = -march=native
-endif
+#endif
 
 ifeq "$(shell echo 'int main() {return 0; }' | $(CLANG_BIN) -x c - -flto=full -o .test 2>/dev/null && echo 1 || echo 0 ; rm -f .test )" "1"
         AFL_CLANG_FLTO ?= -flto=full
@@ -196,8 +196,7 @@ ifeq "$(shell echo 'int main() {return 0; }' | $(CLANG_BIN) -x c - -fuse-ld=`com
 endif
 endif
 
-CFLAGS          ?= -O3 -funroll-loops
+CFLAGS          ?= -O3 -funroll-loops -D_FORTIFY_SOURCE=2
-# -D_FORTIFY_SOURCE=2
 override CFLAGS += -Wall \
                -g -Wno-pointer-sign -I ../include/ \
                -DAFL_PATH=\"$(HELPER_PATH)\" -DBIN_PATH=\"$(BIN_PATH)\" \
@@ -210,8 +209,7 @@ ifdef AFL_TRACE_PC
   $(info Compile option AFL_TRACE_PC is deprecated, just set AFL_LLVM_INSTRUMENT=PCGUARD to activate when compiling targets )
 endif
 
-CXXFLAGS          ?= -O3 -funroll-loops
+CXXFLAGS          ?= -O3 -funroll-loops -D_FORTIFY_SOURCE=2
-# -D_FORTIFY_SOURCE=2
 override CXXFLAGS += -Wall -g -I ../include/ \
                      -DVERSION=\"$(VERSION)\" -Wno-variadic-macros
 

llvm_mode/Makefile

@@ -1,2 +1,2 @@
 all:
-	@echo please use GNU make, thanks!
+	@gmake all || echo please install GNUmake

llvm_mode/afl-clang-fast.c

@@ -335,7 +335,7 @@ static void edit_params(u32 argc, char **argv, char **envp) {
 
   }
 
-  cc_params[cc_par_cnt++] = "-Qunused-arguments";
+  //cc_params[cc_par_cnt++] = "-Qunused-arguments";
 
   // in case LLVM is installed not via a package manager or "make install"
   // e.g. compiled download or compiled from github then it's ./lib directory
@@ -440,8 +440,8 @@ static void edit_params(u32 argc, char **argv, char **envp) {
     cc_params[cc_par_cnt++] = "-g";
     cc_params[cc_par_cnt++] = "-O3";
     cc_params[cc_par_cnt++] = "-funroll-loops";
-    if (strlen(march_opt) > 1 && march_opt[0] == '-')
+    //if (strlen(march_opt) > 1 && march_opt[0] == '-')
-      cc_params[cc_par_cnt++] = march_opt;
+    //  cc_params[cc_par_cnt++] = march_opt;
 
   }
 

llvm_mode/afl-llvm-rt.o.c

@@ -789,12 +789,12 @@ void __sanitizer_cov_trace_pc_guard(uint32_t *guard) {
 void __sanitizer_cov_trace_pc_guard_init(uint32_t *start, uint32_t *stop) {
 
   u32 inst_ratio = 100;
-  u8 *x;
+  char *x;
 
   if (start == stop || *start) return;
 
   x = getenv("AFL_INST_RATIO");
-  if (x) inst_ratio = atoi(x);
+  if (x) inst_ratio = (u32)atoi(x);
 
   if (!inst_ratio || inst_ratio > 100) {