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authorhexcoder- <heiko@hexco.de>2019-10-19 16:19:46 +0200
committerhexcoder- <heiko@hexco.de>2019-10-19 16:19:46 +0200
commit8a786377196fbaafeecbca17fad66ea1e76c7de2 (patch)
tree1f8ccf4a15846a249a5bd9ec7222cbc9df197ae0 /gcc_plugin/afl-gcc-fast.c
parent230c135d4e05d810397138f2b6eb1927955f8900 (diff)
downloadAFLplusplus-8a786377196fbaafeecbca17fad66ea1e76c7de2.tar.gz
add gcc_plugin to code formatter and run it
Diffstat (limited to 'gcc_plugin/afl-gcc-fast.c')
-rw-r--r--gcc_plugin/afl-gcc-fast.c144
1 files changed, 88 insertions, 56 deletions
diff --git a/gcc_plugin/afl-gcc-fast.c b/gcc_plugin/afl-gcc-fast.c
index 25ecf310..73709321 100644
--- a/gcc_plugin/afl-gcc-fast.c
+++ b/gcc_plugin/afl-gcc-fast.c
@@ -36,16 +36,15 @@
#include <stdlib.h>
#include <string.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* 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 */
/* Try to find the runtime libraries. If that fails, abort. */
static void find_obj(u8* argv0) {
- u8 *afl_path = getenv("AFL_PATH");
+ u8* afl_path = getenv("AFL_PATH");
u8 *slash, *tmp;
if (afl_path) {
@@ -53,9 +52,11 @@ static void find_obj(u8* argv0) {
tmp = alloc_printf("%s/afl-gcc-rt.o", afl_path);
if (!access(tmp, R_OK)) {
+
obj_path = afl_path;
ck_free(tmp);
return;
+
}
ck_free(tmp);
@@ -66,7 +67,7 @@ static void find_obj(u8* argv0) {
if (slash) {
- u8 *dir;
+ u8* dir;
*slash = 0;
dir = ck_strdup(argv0);
@@ -75,9 +76,11 @@ static void find_obj(u8* argv0) {
tmp = alloc_printf("%s/afl-gcc-rt.o", dir);
if (!access(tmp, R_OK)) {
+
obj_path = dir;
ck_free(tmp);
return;
+
}
ck_free(tmp);
@@ -86,35 +89,44 @@ static void find_obj(u8* argv0) {
}
if (!access(AFL_PATH "/afl-gcc-rt.o", R_OK)) {
+
obj_path = AFL_PATH;
return;
+
}
- FATAL("Unable to find 'afl-gcc-rt.o' or 'afl-gcc-pass.so'. Please set AFL_PATH");
-}
+ FATAL(
+ "Unable to find 'afl-gcc-rt.o' or 'afl-gcc-pass.so'. Please set "
+ "AFL_PATH");
+}
/* Copy argv to cc_params, making the necessary edits. */
static void edit_params(u32 argc, char** argv) {
- u8 fortify_set = 0, asan_set = 0, x_set = 0, maybe_linking = 1;
- u8 *name;
+ u8 fortify_set = 0, asan_set = 0, x_set = 0, maybe_linking = 1;
+ u8* name;
cc_params = ck_alloc((argc + 64) * sizeof(u8*));
name = strrchr(argv[0], '/');
- if (!name) name = argv[0]; else ++name;
+ if (!name)
+ name = argv[0];
+ else
+ ++name;
if (!strcmp(name, "afl-g++-fast")) {
+
u8* alt_cxx = getenv("AFL_CXX");
cc_params[0] = alt_cxx ? alt_cxx : (u8*)"g++";
+
} else {
+
u8* alt_cc = getenv("AFL_CC");
cc_params[0] = alt_cc ? alt_cc : (u8*)"gcc";
- }
-
+ }
char* fplugin_arg = alloc_printf("-fplugin=%s/afl-gcc-pass.so", obj_path);
cc_params[cc_par_cnt++] = fplugin_arg;
@@ -124,6 +136,7 @@ static void edit_params(u32 argc, char** argv) {
if (argc == 1 && !strcmp(argv[1], "-v")) maybe_linking = 0;
while (--argc) {
+
u8* cur = *(++argv);
#if defined(__x86_64__)
@@ -133,10 +146,11 @@ static void edit_params(u32 argc, char** argv) {
if (!strcmp(cur, "-x")) x_set = 1;
if (!strcmp(cur, "-c") || !strcmp(cur, "-S") || !strcmp(cur, "-E") ||
- !strcmp(cur, "-v")) maybe_linking = 0;
+ !strcmp(cur, "-v"))
+ maybe_linking = 0;
- if (!strcmp(cur, "-fsanitize=address") ||
- !strcmp(cur, "-fsanitize=memory")) asan_set = 1;
+ if (!strcmp(cur, "-fsanitize=address") || !strcmp(cur, "-fsanitize=memory"))
+ asan_set = 1;
if (strstr(cur, "FORTIFY_SOURCE")) fortify_set = 1;
@@ -150,8 +164,7 @@ static void edit_params(u32 argc, char** argv) {
cc_params[cc_par_cnt++] = "-fstack-protector-all";
- if (!fortify_set)
- cc_params[cc_par_cnt++] = "-D_FORTIFY_SOURCE=2";
+ if (!fortify_set) cc_params[cc_par_cnt++] = "-D_FORTIFY_SOURCE=2";
}
@@ -217,31 +230,37 @@ static void edit_params(u32 argc, char** argv) {
*/
- cc_params[cc_par_cnt++] = "-D__AFL_LOOP(_A)="
- "({ static volatile char *_B __attribute__((used)); "
- " _B = (char*)\"" PERSIST_SIG "\"; "
+ cc_params[cc_par_cnt++] =
+ "-D__AFL_LOOP(_A)="
+ "({ static volatile char *_B __attribute__((used)); "
+ " _B = (char*)\"" PERSIST_SIG
+ "\"; "
#ifdef __APPLE__
- "int _L(unsigned int) __asm__(\"___afl_persistent_loop\"); "
+ "int _L(unsigned int) __asm__(\"___afl_persistent_loop\"); "
#else
- "int _L(unsigned int) __asm__(\"__afl_persistent_loop\"); "
-#endif /* ^__APPLE__ */
- "_L(_A); })";
-
- cc_params[cc_par_cnt++] = "-D__AFL_INIT()="
- "do { static volatile char *_A __attribute__((used)); "
- " _A = (char*)\"" DEFER_SIG "\"; "
+ "int _L(unsigned int) __asm__(\"__afl_persistent_loop\"); "
+#endif /* ^__APPLE__ */
+ "_L(_A); })";
+
+ cc_params[cc_par_cnt++] =
+ "-D__AFL_INIT()="
+ "do { static volatile char *_A __attribute__((used)); "
+ " _A = (char*)\"" DEFER_SIG
+ "\"; "
#ifdef __APPLE__
- "void _I(void) __asm__(\"___afl_manual_init\"); "
+ "void _I(void) __asm__(\"___afl_manual_init\"); "
#else
- "void _I(void) __asm__(\"__afl_manual_init\"); "
-#endif /* ^__APPLE__ */
- "_I(); } while (0)";
+ "void _I(void) __asm__(\"__afl_manual_init\"); "
+#endif /* ^__APPLE__ */
+ "_I(); } while (0)";
if (maybe_linking) {
if (x_set) {
+
cc_params[cc_par_cnt++] = "-x";
cc_params[cc_par_cnt++] = "none";
+
}
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-gcc-rt.o", obj_path);
@@ -252,46 +271,58 @@ static void edit_params(u32 argc, char** argv) {
}
-
/* Main entry point */
int main(int argc, char** argv) {
if (argc < 2 || strcmp(argv[1], "-h") == 0) {
- printf(cCYA "afl-gcc-fast" VERSION cRST " initially by <aseipp@pobox.com>, maintainer: hexcoder-\n"
- "\n"
- "This is a helper application for afl-fuzz. It serves as a drop-in replacement\n"
- "for gcc, letting you recompile third-party code with the required runtime\n"
- "instrumentation. A common use pattern would be one of the following:\n\n"
-
- " CC=%s/afl-gcc-fast ./configure\n"
- " CXX=%s/afl-g++-fast ./configure\n\n"
-
- "In contrast to the traditional afl-gcc tool, this version is implemented as\n"
- "a GCC plugin and tends to offer improved performance with slow programs\n"
- "(similarly to the LLVM plugin used by afl-clang-fast).\n\n"
-
- "You can specify custom next-stage toolchain via AFL_CC and AFL_CXX. Setting\n"
- "AFL_HARDEN enables hardening optimizations in the compiled code.\n\n",
- BIN_PATH, BIN_PATH);
+ printf(
+ cCYA
+ "afl-gcc-fast" VERSION cRST
+ " initially by <aseipp@pobox.com>, maintainer: hexcoder-\n"
+ "\n"
+ "This is a helper application for afl-fuzz. It serves as a drop-in "
+ "replacement\n"
+ "for gcc, letting you recompile third-party code with the required "
+ "runtime\n"
+ "instrumentation. A common use pattern would be one of the "
+ "following:\n\n"
+
+ " CC=%s/afl-gcc-fast ./configure\n"
+ " CXX=%s/afl-g++-fast ./configure\n\n"
+
+ "In contrast to the traditional afl-gcc tool, this version is "
+ "implemented as\n"
+ "a GCC plugin and tends to offer improved performance with slow "
+ "programs\n"
+ "(similarly to the LLVM plugin used by afl-clang-fast).\n\n"
+
+ "You can specify custom next-stage toolchain via AFL_CC and AFL_CXX. "
+ "Setting\n"
+ "AFL_HARDEN enables hardening optimizations in the compiled code.\n\n",
+ BIN_PATH, BIN_PATH);
exit(1);
} else if (isatty(2) && !getenv("AFL_QUIET")) {
- SAYF(cCYA "afl-gcc-fast" VERSION cRST " initially by <aseipp@pobox.com>, maintainer: hexcoder-\n");
+ SAYF(cCYA "afl-gcc-fast" VERSION cRST
+ " initially by <aseipp@pobox.com>, maintainer: hexcoder-\n");
}
find_obj(argv[0]);
edit_params(argc, argv);
-/*if (isatty(2) && !getenv("AFL_QUIET")) {
- printf("Calling \"%s\" with:\n", cc_params[0]);
- for(int i=1; i<cc_par_cnt; i++) printf("%s\n", cc_params[i]);
- }
-*/
+ /*if (isatty(2) && !getenv("AFL_QUIET")) {
+
+ printf("Calling \"%s\" with:\n", cc_params[0]);
+ for(int i=1; i<cc_par_cnt; i++) printf("%s\n", cc_params[i]);
+
+ }
+
+ */
execvp(cc_params[0], (char**)cc_params);
FATAL("Oops, failed to execute '%s' - check your PATH", cc_params[0]);
@@ -299,3 +330,4 @@ int main(int argc, char** argv) {
return 0;
}
+