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add gcc_plugin to code formatter and run it

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This commit is contained in:
hexcoder-
2019-10-19 16:19:46 +02:00
parent 230c135d4e
commit 8a78637719
13 changed files with 509 additions and 416 deletions
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136
gcc_plugin/afl-gcc-fast.c
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@ -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);
@ -86,36 +89,45 @@ 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); })";
"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 "\"; "
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"
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"
" 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"
"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);
"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;
}