Move libFuzzer to compiler_rt.
Resulting library binaries will be named libclang_rt.fuzzer*, and will
be placed in Clang toolchain, allowing redistribution.
Differential Revision: https://reviews.llvm.org/D36908
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@311407 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerTracePC.cpp b/FuzzerTracePC.cpp
new file mode 100644
index 0000000..d038374
--- /dev/null
+++ b/FuzzerTracePC.cpp
@@ -0,0 +1,566 @@
+//===- FuzzerTracePC.cpp - PC tracing--------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// Trace PCs.
+// This module implements __sanitizer_cov_trace_pc_guard[_init],
+// the callback required for -fsanitize-coverage=trace-pc-guard instrumentation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "FuzzerTracePC.h"
+#include "FuzzerCorpus.h"
+#include "FuzzerDefs.h"
+#include "FuzzerDictionary.h"
+#include "FuzzerExtFunctions.h"
+#include "FuzzerIO.h"
+#include "FuzzerUtil.h"
+#include "FuzzerValueBitMap.h"
+#include <set>
+
+// The coverage counters and PCs.
+// These are declared as global variables named "__sancov_*" to simplify
+// experiments with inlined instrumentation.
+alignas(64) ATTRIBUTE_INTERFACE
+uint8_t __sancov_trace_pc_guard_8bit_counters[fuzzer::TracePC::kNumPCs];
+
+ATTRIBUTE_INTERFACE
+uintptr_t __sancov_trace_pc_pcs[fuzzer::TracePC::kNumPCs];
+
+namespace fuzzer {
+
+TracePC TPC;
+
+int ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr;
+
+uint8_t *TracePC::Counters() const {
+ return __sancov_trace_pc_guard_8bit_counters;
+}
+
+uintptr_t *TracePC::PCs() const {
+ return __sancov_trace_pc_pcs;
+}
+
+size_t TracePC::GetTotalPCCoverage() {
+ if (ObservedPCs.size())
+ return ObservedPCs.size();
+ size_t Res = 0;
+ for (size_t i = 1, N = GetNumPCs(); i < N; i++)
+ if (PCs()[i])
+ Res++;
+ return Res;
+}
+
+
+void TracePC::HandleInline8bitCountersInit(uint8_t *Start, uint8_t *Stop) {
+ if (Start == Stop) return;
+ if (NumModulesWithInline8bitCounters &&
+ ModuleCounters[NumModulesWithInline8bitCounters-1].Start == Start) return;
+ assert(NumModulesWithInline8bitCounters <
+ sizeof(ModuleCounters) / sizeof(ModuleCounters[0]));
+ ModuleCounters[NumModulesWithInline8bitCounters++] = {Start, Stop};
+ NumInline8bitCounters += Stop - Start;
+}
+
+void TracePC::HandlePCsInit(const uint8_t *Start, const uint8_t *Stop) {
+ const uintptr_t *B = reinterpret_cast<const uintptr_t *>(Start);
+ const uintptr_t *E = reinterpret_cast<const uintptr_t *>(Stop);
+ if (NumPCTables && ModulePCTable[NumPCTables - 1].Start == B) return;
+ assert(NumPCTables < sizeof(ModulePCTable) / sizeof(ModulePCTable[0]));
+ ModulePCTable[NumPCTables++] = {B, E};
+ NumPCsInPCTables += E - B;
+}
+
+void TracePC::HandleInit(uint32_t *Start, uint32_t *Stop) {
+ if (Start == Stop || *Start) return;
+ assert(NumModules < sizeof(Modules) / sizeof(Modules[0]));
+ for (uint32_t *P = Start; P < Stop; P++) {
+ NumGuards++;
+ if (NumGuards == kNumPCs) {
+ RawPrint(
+ "WARNING: The binary has too many instrumented PCs.\n"
+ " You may want to reduce the size of the binary\n"
+ " for more efficient fuzzing and precise coverage data\n");
+ }
+ *P = NumGuards % kNumPCs;
+ }
+ Modules[NumModules].Start = Start;
+ Modules[NumModules].Stop = Stop;
+ NumModules++;
+}
+
+void TracePC::PrintModuleInfo() {
+ if (NumGuards) {
+ Printf("INFO: Loaded %zd modules (%zd guards): ", NumModules, NumGuards);
+ for (size_t i = 0; i < NumModules; i++)
+ Printf("%zd [%p, %p), ", Modules[i].Stop - Modules[i].Start,
+ Modules[i].Start, Modules[i].Stop);
+ Printf("\n");
+ }
+ if (NumModulesWithInline8bitCounters) {
+ Printf("INFO: Loaded %zd modules (%zd inline 8-bit counters): ",
+ NumModulesWithInline8bitCounters, NumInline8bitCounters);
+ for (size_t i = 0; i < NumModulesWithInline8bitCounters; i++)
+ Printf("%zd [%p, %p), ", ModuleCounters[i].Stop - ModuleCounters[i].Start,
+ ModuleCounters[i].Start, ModuleCounters[i].Stop);
+ Printf("\n");
+ }
+ if (NumPCTables) {
+ Printf("INFO: Loaded %zd PC tables (%zd PCs): ", NumPCTables,
+ NumPCsInPCTables);
+ for (size_t i = 0; i < NumPCTables; i++) {
+ Printf("%zd [%p,%p), ", ModulePCTable[i].Stop - ModulePCTable[i].Start,
+ ModulePCTable[i].Start, ModulePCTable[i].Stop);
+ }
+ Printf("\n");
+
+ if ((NumGuards && NumGuards != NumPCsInPCTables) ||
+ (NumInline8bitCounters && NumInline8bitCounters != NumPCsInPCTables)) {
+ Printf("ERROR: The size of coverage PC tables does not match the"
+ " number of instrumented PCs. This might be a bug in the compiler,"
+ " please contact the libFuzzer developers.\n");
+ _Exit(1);
+ }
+ }
+}
+
+ATTRIBUTE_NO_SANITIZE_ALL
+void TracePC::HandleCallerCallee(uintptr_t Caller, uintptr_t Callee) {
+ const uintptr_t kBits = 12;
+ const uintptr_t kMask = (1 << kBits) - 1;
+ uintptr_t Idx = (Caller & kMask) | ((Callee & kMask) << kBits);
+ ValueProfileMap.AddValueModPrime(Idx);
+}
+
+void TracePC::UpdateObservedPCs() {
+ if (NumPCsInPCTables) {
+ auto Observe = [&](uintptr_t PC) {
+ bool Inserted = ObservedPCs.insert(PC).second;
+ if (Inserted && DoPrintNewPCs)
+ PrintPC("\tNEW_PC: %p %F %L\n", "\tNEW_PC: %p\n", PC + 1);
+ };
+
+ if (NumInline8bitCounters == NumPCsInPCTables) {
+ for (size_t i = 0; i < NumModulesWithInline8bitCounters; i++) {
+ uint8_t *Beg = ModuleCounters[i].Start;
+ size_t Size = ModuleCounters[i].Stop - Beg;
+ assert(Size ==
+ (size_t)(ModulePCTable[i].Stop - ModulePCTable[i].Start));
+ for (size_t j = 0; j < Size; j++)
+ if (Beg[j])
+ Observe(ModulePCTable[i].Start[j]);
+ }
+ } else if (NumGuards == NumPCsInPCTables) {
+ size_t GuardIdx = 1;
+ for (size_t i = 0; i < NumModules; i++) {
+ uint32_t *Beg = Modules[i].Start;
+ size_t Size = Modules[i].Stop - Beg;
+ assert(Size ==
+ (size_t)(ModulePCTable[i].Stop - ModulePCTable[i].Start));
+ for (size_t j = 0; j < Size; j++, GuardIdx++)
+ if (Counters()[GuardIdx])
+ Observe(ModulePCTable[i].Start[j]);
+ }
+ }
+ }
+}
+
+inline ALWAYS_INLINE uintptr_t GetPreviousInstructionPc(uintptr_t PC) {
+ // TODO: this implementation is x86 only.
+ // see sanitizer_common GetPreviousInstructionPc for full implementation.
+ return PC - 1;
+}
+
+inline ALWAYS_INLINE uintptr_t GetNextInstructionPc(uintptr_t PC) {
+ // TODO: this implementation is x86 only.
+ // see sanitizer_common GetPreviousInstructionPc for full implementation.
+ return PC + 1;
+}
+
+static std::string GetModuleName(uintptr_t PC) {
+ char ModulePathRaw[4096] = ""; // What's PATH_MAX in portable C++?
+ void *OffsetRaw = nullptr;
+ if (!EF->__sanitizer_get_module_and_offset_for_pc(
+ reinterpret_cast<void *>(PC), ModulePathRaw,
+ sizeof(ModulePathRaw), &OffsetRaw))
+ return "";
+ return ModulePathRaw;
+}
+
+void TracePC::PrintCoverage() {
+ if (!EF->__sanitizer_symbolize_pc ||
+ !EF->__sanitizer_get_module_and_offset_for_pc) {
+ Printf("INFO: __sanitizer_symbolize_pc or "
+ "__sanitizer_get_module_and_offset_for_pc is not available,"
+ " not printing coverage\n");
+ return;
+ }
+ Printf("COVERAGE:\n");
+ std::string LastFunctionName = "";
+ std::string LastFileStr = "";
+ std::set<size_t> UncoveredLines;
+ std::set<size_t> CoveredLines;
+
+ auto FunctionEndCallback = [&](const std::string &CurrentFunc,
+ const std::string &CurrentFile) {
+ if (LastFunctionName != CurrentFunc) {
+ if (CoveredLines.empty() && !UncoveredLines.empty()) {
+ Printf("UNCOVERED_FUNC: %s\n", LastFunctionName.c_str());
+ } else {
+ for (auto Line : UncoveredLines) {
+ if (!CoveredLines.count(Line))
+ Printf("UNCOVERED_LINE: %s %s:%zd\n", LastFunctionName.c_str(),
+ LastFileStr.c_str(), Line);
+ }
+ }
+
+ UncoveredLines.clear();
+ CoveredLines.clear();
+ LastFunctionName = CurrentFunc;
+ LastFileStr = CurrentFile;
+ }
+ };
+
+ for (size_t i = 0; i < NumPCTables; i++) {
+ auto &M = ModulePCTable[i];
+ assert(M.Start < M.Stop);
+ auto ModuleName = GetModuleName(*M.Start);
+ for (auto Ptr = M.Start; Ptr < M.Stop; Ptr++) {
+ auto PC = *Ptr;
+ auto VisualizePC = GetNextInstructionPc(PC);
+ bool IsObserved = ObservedPCs.count(PC);
+ std::string FileStr = DescribePC("%s", VisualizePC);
+ if (!IsInterestingCoverageFile(FileStr)) continue;
+ std::string FunctionStr = DescribePC("%F", VisualizePC);
+ FunctionEndCallback(FunctionStr, FileStr);
+ std::string LineStr = DescribePC("%l", VisualizePC);
+ size_t Line = std::stoul(LineStr);
+ if (IsObserved && CoveredLines.insert(Line).second)
+ Printf("COVERED: %s %s:%zd\n", FunctionStr.c_str(), FileStr.c_str(),
+ Line);
+ else
+ UncoveredLines.insert(Line);
+ }
+ }
+ FunctionEndCallback("", "");
+}
+
+void TracePC::DumpCoverage() {
+ if (EF->__sanitizer_dump_coverage) {
+ std::vector<uintptr_t> PCsCopy(GetNumPCs());
+ for (size_t i = 0; i < GetNumPCs(); i++)
+ PCsCopy[i] = PCs()[i] ? GetPreviousInstructionPc(PCs()[i]) : 0;
+ EF->__sanitizer_dump_coverage(PCsCopy.data(), PCsCopy.size());
+ }
+}
+
+// Value profile.
+// We keep track of various values that affect control flow.
+// These values are inserted into a bit-set-based hash map.
+// Every new bit in the map is treated as a new coverage.
+//
+// For memcmp/strcmp/etc the interesting value is the length of the common
+// prefix of the parameters.
+// For cmp instructions the interesting value is a XOR of the parameters.
+// The interesting value is mixed up with the PC and is then added to the map.
+
+ATTRIBUTE_NO_SANITIZE_ALL
+void TracePC::AddValueForMemcmp(void *caller_pc, const void *s1, const void *s2,
+ size_t n, bool StopAtZero) {
+ if (!n) return;
+ size_t Len = std::min(n, Word::GetMaxSize());
+ const uint8_t *A1 = reinterpret_cast<const uint8_t *>(s1);
+ const uint8_t *A2 = reinterpret_cast<const uint8_t *>(s2);
+ uint8_t B1[Word::kMaxSize];
+ uint8_t B2[Word::kMaxSize];
+ // Copy the data into locals in this non-msan-instrumented function
+ // to avoid msan complaining further.
+ size_t Hash = 0; // Compute some simple hash of both strings.
+ for (size_t i = 0; i < Len; i++) {
+ B1[i] = A1[i];
+ B2[i] = A2[i];
+ size_t T = B1[i];
+ Hash ^= (T << 8) | B2[i];
+ }
+ size_t I = 0;
+ for (; I < Len; I++)
+ if (B1[I] != B2[I] || (StopAtZero && B1[I] == 0))
+ break;
+ size_t PC = reinterpret_cast<size_t>(caller_pc);
+ size_t Idx = (PC & 4095) | (I << 12);
+ ValueProfileMap.AddValue(Idx);
+ TORCW.Insert(Idx ^ Hash, Word(B1, Len), Word(B2, Len));
+}
+
+template <class T>
+ATTRIBUTE_TARGET_POPCNT ALWAYS_INLINE
+ATTRIBUTE_NO_SANITIZE_ALL
+void TracePC::HandleCmp(uintptr_t PC, T Arg1, T Arg2) {
+ uint64_t ArgXor = Arg1 ^ Arg2;
+ uint64_t ArgDistance = __builtin_popcountll(ArgXor) + 1; // [1,65]
+ uintptr_t Idx = ((PC & 4095) + 1) * ArgDistance;
+ if (sizeof(T) == 4)
+ TORC4.Insert(ArgXor, Arg1, Arg2);
+ else if (sizeof(T) == 8)
+ TORC8.Insert(ArgXor, Arg1, Arg2);
+ ValueProfileMap.AddValue(Idx);
+}
+
+static size_t InternalStrnlen(const char *S, size_t MaxLen) {
+ size_t Len = 0;
+ for (; Len < MaxLen && S[Len]; Len++) {}
+ return Len;
+}
+
+// Finds min of (strlen(S1), strlen(S2)).
+// Needed bacause one of these strings may actually be non-zero terminated.
+static size_t InternalStrnlen2(const char *S1, const char *S2) {
+ size_t Len = 0;
+ for (; S1[Len] && S2[Len]; Len++) {}
+ return Len;
+}
+
+void TracePC::ClearInlineCounters() {
+ for (size_t i = 0; i < NumModulesWithInline8bitCounters; i++) {
+ uint8_t *Beg = ModuleCounters[i].Start;
+ size_t Size = ModuleCounters[i].Stop - Beg;
+ memset(Beg, 0, Size);
+ }
+}
+
+} // namespace fuzzer
+
+extern "C" {
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+void __sanitizer_cov_trace_pc_guard(uint32_t *Guard) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ 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
+// in both Clang and GCC.
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+void __sanitizer_cov_trace_pc() {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ uintptr_t Idx = PC & (((uintptr_t)1 << fuzzer::TracePC::kTracePcBits) - 1);
+ __sancov_trace_pc_pcs[Idx] = PC;
+ __sancov_trace_pc_guard_8bit_counters[Idx]++;
+}
+
+ATTRIBUTE_INTERFACE
+void __sanitizer_cov_trace_pc_guard_init(uint32_t *Start, uint32_t *Stop) {
+ fuzzer::TPC.HandleInit(Start, Stop);
+}
+
+ATTRIBUTE_INTERFACE
+void __sanitizer_cov_8bit_counters_init(uint8_t *Start, uint8_t *Stop) {
+ fuzzer::TPC.HandleInline8bitCountersInit(Start, Stop);
+}
+
+ATTRIBUTE_INTERFACE
+void __sanitizer_cov_pcs_init(const uint8_t *pcs_beg, const uint8_t *pcs_end) {
+ fuzzer::TPC.HandlePCsInit(pcs_beg, pcs_end);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+void __sanitizer_cov_trace_pc_indir(uintptr_t Callee) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCallerCallee(PC, Callee);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_cmp8(uint64_t Arg1, uint64_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+// Now the __sanitizer_cov_trace_const_cmp[1248] callbacks just mimic
+// the behaviour of __sanitizer_cov_trace_cmp[1248] ones. This, however,
+// should be changed later to make full use of instrumentation.
+void __sanitizer_cov_trace_const_cmp8(uint64_t Arg1, uint64_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_cmp4(uint32_t Arg1, uint32_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_const_cmp4(uint32_t Arg1, uint32_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_cmp2(uint16_t Arg1, uint16_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_const_cmp2(uint16_t Arg1, uint16_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_cmp1(uint8_t Arg1, uint8_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_const_cmp1(uint8_t Arg1, uint8_t Arg2) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Arg1, Arg2);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_switch(uint64_t Val, uint64_t *Cases) {
+ uint64_t N = Cases[0];
+ uint64_t ValSizeInBits = Cases[1];
+ uint64_t *Vals = Cases + 2;
+ // Skip the most common and the most boring case.
+ if (Vals[N - 1] < 256 && Val < 256)
+ return;
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ size_t i;
+ uint64_t Token = 0;
+ for (i = 0; i < N; i++) {
+ Token = Val ^ Vals[i];
+ if (Val < Vals[i])
+ break;
+ }
+
+ if (ValSizeInBits == 16)
+ fuzzer::TPC.HandleCmp(PC + i, static_cast<uint16_t>(Token), (uint16_t)(0));
+ else if (ValSizeInBits == 32)
+ fuzzer::TPC.HandleCmp(PC + i, static_cast<uint32_t>(Token), (uint32_t)(0));
+ else
+ fuzzer::TPC.HandleCmp(PC + i, Token, (uint64_t)(0));
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_div4(uint32_t Val) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Val, (uint32_t)0);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_div8(uint64_t Val) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Val, (uint64_t)0);
+}
+
+ATTRIBUTE_INTERFACE
+ATTRIBUTE_NO_SANITIZE_ALL
+ATTRIBUTE_TARGET_POPCNT
+void __sanitizer_cov_trace_gep(uintptr_t Idx) {
+ uintptr_t PC = reinterpret_cast<uintptr_t>(__builtin_return_address(0));
+ fuzzer::TPC.HandleCmp(PC, Idx, (uintptr_t)0);
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_memcmp(void *caller_pc, const void *s1,
+ const void *s2, size_t n, int result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ if (result == 0) return; // No reason to mutate.
+ if (n <= 1) return; // Not interesting.
+ fuzzer::TPC.AddValueForMemcmp(caller_pc, s1, s2, n, /*StopAtZero*/false);
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_strncmp(void *caller_pc, const char *s1,
+ const char *s2, size_t n, int result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ if (result == 0) return; // No reason to mutate.
+ size_t Len1 = fuzzer::InternalStrnlen(s1, n);
+ size_t Len2 = fuzzer::InternalStrnlen(s2, n);
+ n = std::min(n, Len1);
+ n = std::min(n, Len2);
+ if (n <= 1) return; // Not interesting.
+ fuzzer::TPC.AddValueForMemcmp(caller_pc, s1, s2, n, /*StopAtZero*/true);
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_strcmp(void *caller_pc, const char *s1,
+ const char *s2, int result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ if (result == 0) return; // No reason to mutate.
+ size_t N = fuzzer::InternalStrnlen2(s1, s2);
+ if (N <= 1) return; // Not interesting.
+ fuzzer::TPC.AddValueForMemcmp(caller_pc, s1, s2, N, /*StopAtZero*/true);
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_strncasecmp(void *called_pc, const char *s1,
+ const char *s2, size_t n, int result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ return __sanitizer_weak_hook_strncmp(called_pc, s1, s2, n, result);
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_strcasecmp(void *called_pc, const char *s1,
+ const char *s2, int result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ return __sanitizer_weak_hook_strcmp(called_pc, s1, s2, result);
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_strstr(void *called_pc, const char *s1,
+ const char *s2, char *result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ fuzzer::TPC.MMT.Add(reinterpret_cast<const uint8_t *>(s2), strlen(s2));
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_strcasestr(void *called_pc, const char *s1,
+ const char *s2, char *result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ fuzzer::TPC.MMT.Add(reinterpret_cast<const uint8_t *>(s2), strlen(s2));
+}
+
+ATTRIBUTE_INTERFACE ATTRIBUTE_NO_SANITIZE_MEMORY
+void __sanitizer_weak_hook_memmem(void *called_pc, const void *s1, size_t len1,
+ const void *s2, size_t len2, void *result) {
+ if (fuzzer::ScopedDoingMyOwnMemOrStr::DoingMyOwnMemOrStr) return;
+ fuzzer::TPC.MMT.Add(reinterpret_cast<const uint8_t *>(s2), len2);
+}
+} // extern "C"