Function writeCallstack

3rdparty/bx/src/debug.cpp:626–685

	}

	int32_t writeCallstack(WriterI* _writer, const uintptr_t* _stack, uint32_t _num, Error* _err)
	{
		BX_ERROR_SCOPE(_err);

		char   demangleBuf[4096];
		size_t demangleLen = BX_COUNTOF(demangleBuf);

		int32_t total = write(_writer, _err, "Callstack (%d):\n", _num);

		total += write(_writer, _err, "\t #: %-*s  Line  %-*s  Function ---\n", kWidth, "File ---", kWidthPc, "PC ---");

		CallbackData cbData;

		for (uint32_t ii = 0; ii < _num && _err->isOk(); ++ii)
		{
			backtrace_pcinfo(s_stCtx.state, _stack[ii], backtraceFullCb, NULL, &cbData);

			StringView demangledName = "<Unknown?>";

			if (1 == backtrace_syminfo(s_stCtx.state, _stack[ii], backtraceSymInfoCb, NULL, &cbData)
			&&  !cbData.resolvedName.isEmpty() )
			{
				demangleLen = BX_COUNTOF(demangleBuf);
				int32_t demangleStatus;
				abi::__cxa_demangle(cbData.resolvedName.getPtr(), demangleBuf, &demangleLen, &demangleStatus);

				if (0 == demangleStatus)
				{
					demangledName.set({demangleBuf, narrowCast<int32_t>(demangleLen) });
				}
			}

			const StringView fileName = strTail(cbData.fileName, kWidth);

			total += write(_writer, _err
				, "\t%2d: %-*S % 5d  %*p  %S\n"
				, ii
				, kWidth
				, &fileName
				, cbData.line
				, kWidthPc
				, _stack[ii]
				, &demangledName
				);

			if (0 == strCmp(demangledName, "main", 4) )
			{
				if (0 != _num-1-ii)
				{
					total += write(_writer, _err
						, "\t... %d more stack frames below 'main'.\n"
						, _num-1-ii
						);
				}
				break;
			}
		}