2 // Use of this source code is governed by a BSD-style license that can be
17 #include "third_party/abseil-cpp/absl/types/optional.h"
45 // https://llvm.org/bugs/show_bug.cgi?id=18505 - LLVM generates
46 // x86-compatible frame, while GCC needs adjustment.
52 // On Arm-v8.3+ systems with pointer authentication codes (PAC), signature bits
60   // in the HINT space and treated as a no-op on older Arm cores (unlike the  in StripPointerAuthenticationBits()
68   // No-op on other platforms.  in StripPointerAuthenticationBits()
76   return fp_addr[0] - kStackFrameAdjustment;  in GetNextStackFrame()
91   if (fp - prev_fp > 100000) return false;  in IsStackFrameValid()
94   if (fp & (sizeof(uintptr_t) - 1)) return false;  in IsStackFrameValid()
98     if (fp > stack_end - 2 * sizeof(uintptr_t)) return false;  in IsStackFrameValid()
113 //   base::WorkSourceDispatch   <-- unwinding stops (next frame is invalid),
117 //   base::MessagePumpGlib::Run <-- ScanStackForNextFrame() finds valid frame,
134   uintptr_t last_fp_to_scan = std::min(fp + kMaxStackScanArea, stack_end) -  in ScanStackForNextFrame()
158   uintptr_t fp = reinterpret_cast<uintptr_t>(fpp) - kStackFrameAdjustment;  in LinkStackFrames()
200   // No easy way to get end of the stack for non-main threads,  in GetStackEnd()
218 StackTrace::StackTrace() : StackTrace(std::size(trace_)) {}  in StackTrace()  function in base::debug::StackTrace
220 StackTrace::StackTrace(size_t count) {  in StackTrace()  function in base::debug::StackTrace
224 StackTrace::StackTrace(const void* const* trace, size_t count) {  in StackTrace()  function in base::debug::StackTrace
232 bool StackTrace::WillSymbolizeToStreamForTesting() {  in WillSymbolizeToStreamForTesting()
238   // StackTrace::OutputToStream() is not implemented under uclibc, nor AIX.  in WillSymbolizeToStreamForTesting()
251   // Under Fuchsia and Android, StackTrace emits executable build-Ids and  in WillSymbolizeToStreamForTesting()
253   // being symbolized in-process.  in WillSymbolizeToStreamForTesting()
264 const void *const *StackTrace::Addresses(size_t* count) const {  in Addresses()
271 void StackTrace::Print() const {  in Print()
275 void StackTrace::OutputToStream(std::ostream* os) const {  in OutputToStream()
279 std::string StackTrace::ToString() const {  in ToString()
282 std::string StackTrace::ToStringWithPrefix(const char* prefix_string) const {  in ToStringWithPrefix()
290 std::ostream& operator<<(std::ostream& os, const StackTrace& s) {  in operator <<()
294   os << "StackTrace::OutputToStream not implemented.";  in operator <<()
324       skip_initial--;  in TraceStackFramePointersInternal()
354       reinterpret_cast<uintptr_t>(__builtin_frame_address(0)) -  in TraceStackFramePointers()