llvm support for up to version 8

docs/ChangeLog

@@ -27,7 +27,7 @@ Version ++2.52c (2019-05-28):
     to the AFL schedule, not to the FAST schedule. So nothing changes unless
     you use the new -p option :-) - see docs/power_schedules.txt
   - added afl-system-config script to set all system performance options for fuzzing
-  - llvm_mode works with llvm 3.9 up to including 6.0.1
+  - llvm_mode works with llvm 3.9 up to including 8 !
   - qemu_mode got upgraded from 2.1 to 3.1 - incorporated from 
     https://github.com/andreafioraldi/afl and with community patches added
 

llvm_mode/Makefile

@@ -23,11 +23,11 @@ BIN_PATH     = $(PREFIX)/bin
 VERSION     = $(shell grep '^\#define VERSION ' ../config.h | cut -d '"' -f2)
 
 LLVM_CONFIG ?= llvm-config
-LLVM_OK = $(shell $(LLVM_CONFIG) --version | egrep -q '^[5-6]' && echo 0 || echo 1 )
-LLVM_UNSUPPORTED = $(shell $(LLVM_CONFIG) --version | egrep -q '^[7-9]' && echo 1 || echo 0 )
+#LLVM_OK = $(shell $(LLVM_CONFIG) --version | egrep -q '^[5-6]' && echo 0 || echo 1 )
+LLVM_UNSUPPORTED = $(shell $(LLVM_CONFIG) --version | egrep -q '^9' && echo 1 || echo 0 )
 
 ifeq "$(LLVM_UNSUPPORTED)" "1"
-  $(error llvm_mode only supports versions 3.9 up to 6.0.1 )
+  $(warn llvm_mode only supports versions 3.9 up to 8 )
 endif
 
 CFLAGS      ?= -O3 -funroll-loops
@@ -42,7 +42,7 @@ CXXFLAGS    ?= -O3 -funroll-loops
 CXXFLAGS    += -Wall -D_FORTIFY_SOURCE=2 -g -Wno-pointer-sign \
                -DVERSION=\"$(VERSION)\" -Wno-variadic-macros
 
-CLANG_CFL    = `$(LLVM_CONFIG) --cxxflags` -fno-rtti -fpic $(CXXFLAGS)
+CLANG_CFL    = `$(LLVM_CONFIG) --cxxflags` -Wl,-znodelete -fno-rtti -fpic $(CXXFLAGS) 
 CLANG_LFL    = `$(LLVM_CONFIG) --ldflags` $(LDFLAGS)
 
 # User teor2345 reports that this is required to make things work on MacOS X.
@@ -57,11 +57,11 @@ endif
 
 ifeq "$(origin CC)" "default"
   CC         = clang
-  ifeq "$(LLVM_OK)" "1"
+#  ifeq "$(LLVM_OK)" "1"
     CXX        = clang++
-  else
-    CXX        = g++
-  endif
+#  else
+#    CXX        = g++
+#  endif
 endif
 
 ifndef AFL_TRACE_PC

llvm_mode/README.llvm

@@ -7,8 +7,8 @@ Fast LLVM-based instrumentation for afl-fuzz
 1) Introduction
 ---------------
 
-! llvm_mode works with verison 3.0 up to 6.0.1 !
-! llvm version 7, 8 and 9 do not work !
+! llvm_mode works with verison 3.9 up to 8 !
+! llvm version 9 does not work yet !
 
 The code in this directory allows you to instrument programs for AFL using
 true compiler-level instrumentation, instead of the more crude

llvm_mode/compare-transform-pass.so.cc

@@ -73,7 +73,13 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp, const
   IntegerType *Int8Ty = IntegerType::getInt8Ty(C);
   IntegerType *Int32Ty = IntegerType::getInt32Ty(C);
   IntegerType *Int64Ty = IntegerType::getInt64Ty(C);
-  Constant* c = M.getOrInsertFunction("tolower",
+
+#if __clang_major__ < 9
+  Constant* 
+#else
+  FunctionCallee
+#endif
+               c = M.getOrInsertFunction("tolower",
                                          Int32Ty,
                                          Int32Ty
 #if __clang_major__ < 7