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#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define STRINGLIT(S) #S
#define STRINGIFY(S) STRINGLIT(S)
// Required for oss-fuzz to consider the binary a target.
static const char* magic = "LLVMFuzzerTestOneInput";
int main(int argc, char* argv[]) {
char path[PATH_MAX] = {0};
if (**argv != '/') {
if (!getcwd(path, PATH_MAX)) {
perror("Couldn't get CWD");
exit(1);
}
strcat(path, "/");
}
if (strlen(path) + strlen(*argv) + 20 > PATH_MAX) {
fprintf(stderr, "Path length would exceed PATH_MAX\n");
exit(1);
}
strcat(path, *argv);
char* solidus = strrchr(path, '/');
*solidus = 0; // terminate string before last /
char ld_path[PATH_MAX] = {0};
strcpy(ld_path, path);
strcat(ld_path, "/lib");
char ff_path[PATH_MAX] = {0};
strcpy(ff_path, path);
strcat(ff_path, "/firefox/firefox");
if (getenv("LD_LIBRARY_PATH")) {
// Shouldn't be set. Code can be changed to append if it ever is.
fprintf(stderr, "LD_LIBRARY_PATH unexpectedly set\n");
exit(1);
}
if (setenv("LD_LIBRARY_PATH", ld_path, 0)) {
perror("Error setting LD_LIBRARY_PATH");
exit(1);
}
if (setenv("MOZ_RUN_GTEST", "1", 1) || setenv("LIBFUZZER", "1", 1) ||
setenv("FUZZER", STRINGIFY(FUZZ_TARGET), 1)) {
perror("Error setting fuzzing variables");
exit(1);
}
// Temporary (or permanent?) work-around for a bug in the fuzzing interface.
// https://bugzilla.mozilla.org/show_bug.cgi?id=1466021#c9
char* options = getenv("ASAN_OPTIONS");
if (!options) {
fprintf(stderr, "ASAN_OPTIONS not set ?!\n");
exit(1);
}
char append[] = ":detect_stack_use_after_return=0";
char* new_options = (char*)malloc(strlen(options) + sizeof(append));
memcpy(new_options, options, strlen(options));
memcpy(new_options + strlen(options), append, sizeof(append));
if (setenv("ASAN_OPTIONS", new_options, 1)) {
perror("Error setting ASAN_OPTIONS");
exit(1);
}
free(new_options);
return execv(ff_path, argv);
}
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