Danny Robson
a803a13e80
We have to be extraodinarily careful about what functions are called at this low level so it's easier to just avoid any protective wrappers.
76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright:
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* 2012-2016, Danny Robson <danny@nerdcruft.net>
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*/
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#include "./backtrace.hpp"
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#include "./win32/handle.hpp"
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#include "./debug.hpp"
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#include "./except.hpp"
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#include <cstdlib>
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#include <windows.h>
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#include <dbghelp.h>
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///////////////////////////////////////////////////////////////////////////////
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debug::backtrace::backtrace (void)
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{
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m_frames.resize (DEFAULT_DEPTH);
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auto process = GetCurrentProcess();
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if (!SymInitialize (process, NULL, TRUE))
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util::win32_error::throw_code ();
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while (true) {
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auto res = CaptureStackBackTrace (1, m_frames.size (), m_frames.data (), NULL);
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if (res != m_frames.size ()) {
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m_frames.resize (res);
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break;
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}
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m_frames.resize (m_frames.size () * 2);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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std::ostream&
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debug::operator <<(std::ostream &os, const debug::backtrace &rhs) {
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static auto self = GetCurrentProcess ();
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static auto ready = SymInitialize (self, nullptr, TRUE);
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CHECK (ready);
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static constexpr size_t MAX_LENGTH = 255;
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struct {
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SYMBOL_INFO info;
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char name[MAX_LENGTH + 1];
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} symbol;
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symbol.info.MaxNameLen = MAX_LENGTH;
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symbol.info.SizeOfStruct = sizeof (SYMBOL_INFO);
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for (void *frame: rhs.frames ()) {
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symbol.name[0] = '\0';
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SymFromAddr (self, (DWORD64)frame, 0, &symbol.info);
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symbol.name[MAX_LENGTH] = '\0';
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os << self << "\t" << frame << "\t" << symbol.name << "\n";
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}
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return os;
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}
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