LLVM mode passing the full path of the LLVM config bindir.

On FreeBSD the system compiler does not have llvm-config
however system packages provides several version of the
LLVM toolchain thus forcing to pass AFL_CC/AFL_CXX to make
it work fully.

1 files changed, 6 insertions, 2 deletions

diff --git a/llvm_mode/afl-clang-fast.c b/llvm_mode/afl-clang-fast.c
index 1acf8856..e92fb76f 100644
--- a/llvm_mode/afl-clang-fast.c
+++ b/llvm_mode/afl-clang-fast.c
@@ -32,11 +32,13 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 #include <assert.h>
 
 static u8*  obj_path;                  /* Path to runtime libraries         */
 static u8** cc_params;                 /* Parameters passed to the real CC  */
 static u32  cc_par_cnt = 1;            /* Param count, including argv0      */
+static u8  llvm_fullpath[PATH_MAX];
 
 /* Try to find the runtime libraries. If that fails, abort. */
 
@@ -117,12 +119,14 @@ static void edit_params(u32 argc, char** argv) {
   if (!strcmp(name, "afl-clang-fast++")) {
 
     u8* alt_cxx = getenv("AFL_CXX");
-    cc_params[0] = alt_cxx ? alt_cxx : (u8*)"clang++";
+    snprintf(llvm_fullpath, sizeof(llvm_fullpath), "%s/clang++", LLVM_BINDIR);
+    cc_params[0] = alt_cxx ? alt_cxx : (u8*)llvm_fullpath;
 
   } else {
 
     u8* alt_cc = getenv("AFL_CC");
-    cc_params[0] = alt_cc ? alt_cc : (u8*)"clang";
+    snprintf(llvm_fullpath, sizeof(llvm_fullpath), "%s/clang", LLVM_BINDIR);
+    cc_params[0] = alt_cc ? alt_cc : (u8*)llvm_fullpath;
 
   }