libcruft-util/debug.cpp

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/*
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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
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*
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* 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.
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*
* Copyright 2010-2018 Danny Robson <danny@nerdcruft.net>
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*/
#include "backtrace.hpp"
#include "debug.hpp"
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#include "log.hpp"
#include "preprocessor.hpp"
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#include <cstdlib>
#include <iostream>
using namespace util::debug;
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////////////////////////////////////////////////////////////////////////////////
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void
util::debug::detail::panic (const char *msg)
{
std::cerr << "PANIC: " << msg << "\n" << ::debug::backtrace () << std::endl;
breakpoint ();
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abort ();
}
////////////////////////////////////////////////////////////////////////////////
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void
util::debug::detail::not_implemented (const char *msg)
{
panic (msg);
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}
//-----------------------------------------------------------------------------
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void
util::debug::detail::unreachable (const char *msg)
{
panic (msg);
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}
////////////////////////////////////////////////////////////////////////////////
void
warn (void)
{
warn ("Unusual code path found.");
}
//-----------------------------------------------------------------------------
void
warn (const std::string &msg)
{
warn (msg.c_str ());
}
//-----------------------------------------------------------------------------
void
warn (const char *msg)
{
LOG_WARN (msg);
}
////////////////////////////////////////////////////////////////////////////////
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void
util::debug::init [[gnu::constructor]] (void)
{
if (debug_enabled || getenv("DEBUG")) {
LOG_INFO ("minimal debug setup");
//enable_fpe ();
force_console ();
prepare_debugger ();
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if (getenv ("DEBUG_WAIT"))
await_debugger ();
}
}
///////////////////////////////////////////////////////////////////////////////
static void
debug_wait [[gnu::constructor]] (void)
{
if (auto val = getenv ("DEBUG_WAIT")) {
LOG_NOTICE ("awaiting debugger");
if (std::string ("0") != val)
await_debugger ();
}
}
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///////////////////////////////////////////////////////////////////////////////
template <>
bool
util::debug::validator<float>::is_valid (const float &val) noexcept
{
return !std::isnan (val);
}
//-----------------------------------------------------------------------------
template <>
bool
util::debug::validator<double>::is_valid (const double &val) noexcept
{
return !std::isnan (val);
}
///////////////////////////////////////////////////////////////////////////////
#include "std.hpp"
//-----------------------------------------------------------------------------
#define INSTANTIATE(KLASS) \
template <> \
struct util::debug::validator<KLASS> { \
static bool is_valid(KLASS const&); \
}; \
\
bool \
util::debug::validator<KLASS>::is_valid(KLASS const&) \
{ \
return true; \
}
//-----------------------------------------------------------------------------
MAP0(INSTANTIATE,
u08, u16, u32, u64,
i08, i16, i32, i64,
char
)