diff options
| -rw-r--r-- | src/afl-fuzz-init.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/src/afl-fuzz-init.c b/src/afl-fuzz-init.c index e791fdde..4908626a 100644 --- a/src/afl-fuzz-init.c +++ b/src/afl-fuzz-init.c @@ -1479,9 +1479,39 @@ void check_cpu_governor(void) { "drop.\n", min / 1024, max / 1024); - FATAL("Suboptimal CPU scaling governor"); -#endif +#else + u64 min = 0, max = 0; + size_t mlen = sizeof(min); + if (getenv("AFL_SKIP_CPUFREQ")) return; + + ACTF("Checking CPU scaling governor..."); + if (sysctlbyname("hw.cpufrequency_min", &min, &mlen, NULL, 0) == -1) { + + WARNF("Could not check CPU min frequency"); + return; + + } + + if (sysctlbyname("hw.cpufrequency_max", &max, &mlen, NULL, 0) == -1) { + + WARNF("Could not check CPU max frequency"); + return; + + } + + if (min == max) return; + + SAYF("\n" cLRD "[-] " cRST + "Whoops, your system uses on-demand CPU frequency scaling, adjusted\n" + " between %llu and %llu MHz.\n" + " If you don't want to check those settings, set " + "AFL_SKIP_CPUFREQ\n" + " to make afl-fuzz skip this check - but expect some performance " + "drop.\n", + min / 1024, max / 1024); +#endif + FATAL("Suboptimal CPU scaling governor"); } /* Count the number of logical CPU cores. */ |