73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define STRINGLIT(S) #S
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#define STRINGIFY(S) STRINGLIT(S)
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// Required for oss-fuzz to consider the binary a target.
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static const char* magic __attribute__((used)) = "LLVMFuzzerTestOneInput";
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int main(int argc, char* argv[]) {
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char path[PATH_MAX] = {0};
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// Handle (currently not used) relative binary path.
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if (**argv != '/') {
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if (!getcwd(path, PATH_MAX - 1)) {
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perror("getcwd");
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exit(1);
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}
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strcat(path, "/");
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}
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if (strlen(path) + strlen(*argv) + 40 >= PATH_MAX) {
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fprintf(stderr, "Path length would exceed PATH_MAX\n");
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exit(1);
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}
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strcat(path, *argv);
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char* solidus = strrchr(path, '/');
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*solidus = 0; // terminate path before last /
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char ld_path[PATH_MAX] = {0};
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strcpy(ld_path, path);
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strcat(ld_path, "/lib");
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// Expects LD_LIBRARY_PATH to not also be set by oss-fuzz.
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setenv("LD_LIBRARY_PATH", ld_path, 0);
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setenv("HOME", "/tmp", 0);
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setenv("FUZZER", STRINGIFY(FUZZ_TARGET), 1);
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// ContentParentIPC
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char blacklist_path[PATH_MAX] = {0};
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strcpy(blacklist_path, path);
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strcat(blacklist_path, "/firefox/libfuzzer.content.blacklist.txt");
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setenv("MOZ_IPC_MESSAGE_FUZZ_BLACKLIST", blacklist_path, 1);
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// Temporary (or permanent?) work-arounds for fuzzing interface bugs.
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char* options = getenv("ASAN_OPTIONS");
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if (options) {
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char* ptr;
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char* new_options = strdup(options);
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// https://bugzilla.mozilla.org/1477846
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ptr = strstr(new_options, "detect_stack_use_after_return=1");
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if (ptr) ptr[30] = '0';
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// https://bugzilla.mozilla.org/1477844
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ptr = strstr(new_options, "detect_leaks=1");
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if (ptr) ptr[13] = '0';
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setenv("ASAN_OPTIONS", new_options, 1);
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free(new_options);
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}
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char ff_path[PATH_MAX] = {0};
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strcpy(ff_path, path);
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strcat(ff_path, "/firefox/firefox");
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int ret = execv(ff_path, argv);
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if (ret)
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perror("execv");
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return ret;
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}
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