diff options
Diffstat (limited to 'llvm/lib/Fuzzer/FuzzerTracePC.cpp')
| -rw-r--r-- | llvm/lib/Fuzzer/FuzzerTracePC.cpp | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/llvm/lib/Fuzzer/FuzzerTracePC.cpp b/llvm/lib/Fuzzer/FuzzerTracePC.cpp index a54a8c1e99f..ebd33d3ec88 100644 --- a/llvm/lib/Fuzzer/FuzzerTracePC.cpp +++ b/llvm/lib/Fuzzer/FuzzerTracePC.cpp @@ -31,6 +31,9 @@ uint8_t __sancov_trace_pc_guard_8bit_counters[fuzzer::TracePC::kNumPCs]; ATTRIBUTE_INTERFACE uintptr_t __sancov_trace_pc_pcs[fuzzer::TracePC::kNumPCs]; +// Used by -fsanitize-coverage=stack-depth to track stack depth +ATTRIBUTE_INTERFACE thread_local uintptr_t __sancov_lowest_stack; + namespace fuzzer { TracePC TPC; @@ -340,6 +343,14 @@ void TracePC::ClearInlineCounters() { } } +void TracePC::RecordInitialStack() { + InitialStack = __sancov_lowest_stack; +} + +uintptr_t TracePC::GetMaxStackOffset() const { + return InitialStack - __sancov_lowest_stack; // Stack grows down +} + } // namespace fuzzer extern "C" { @@ -350,8 +361,6 @@ void __sanitizer_cov_trace_pc_guard(uint32_t *Guard) { uint32_t Idx = *Guard; __sancov_trace_pc_pcs[Idx] = PC; __sancov_trace_pc_guard_8bit_counters[Idx]++; - // Uncomment the following line to get stack-depth profiling. - // fuzzer::TPC.RecordCurrentStack(); } // Best-effort support for -fsanitize-coverage=trace-pc, which is available |
