libcruft-util/backtrace_win32.cpp

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