blob: 37beb7a51e7edddfd1bcd2569d2bbd0114022fcd [file] [log] [blame]
// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
//
// 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.
#include "VkDebug.hpp"
#include <string>
#include <atomic>
#include <stdarg.h>
#if defined(__unix__)
#define PTRACE
#include <sys/types.h>
#include <sys/ptrace.h>
#elif defined(_WIN32) || defined(_WIN64)
#include <windows.h>
#elif defined(__APPLE__) || defined(__MACH__)
#include <unistd.h>
#include <sys/sysctl.h>
#endif
namespace {
bool IsUnderDebugger()
{
#if defined(PTRACE) && !defined(__APPLE__) && !defined(__MACH__)
static bool checked = false;
static bool res = false;
if (!checked)
{
// If a debugger is attached then we're already being ptraced and ptrace
// will return a non-zero value.
checked = true;
if (ptrace(PTRACE_TRACEME, 0, 1, 0) != 0)
{
res = true;
}
else
{
ptrace(PTRACE_DETACH, 0, 1, 0);
}
}
return res;
#elif defined(_WIN32) || defined(_WIN64)
return IsDebuggerPresent() != 0;
#elif defined(__APPLE__) || defined(__MACH__)
// Code comes from the Apple Technical Q&A QA1361
// Tell sysctl what info we're requestion. Specifically we're asking for
// info about this our PID.
int res = 0;
int request[4] = {
CTL_KERN,
KERN_PROC,
KERN_PROC_PID,
getpid()
};
struct kinfo_proc info;
size_t size = sizeof(info);
info.kp_proc.p_flag = 0;
// Get the info we're requesting, if sysctl fails then info.kp_proc.p_flag will remain 0.
res = sysctl(request, sizeof(request) / sizeof(*request), &info, &size, NULL, 0);
ASSERT_MSG(res == 0, "syscl returned %d", res);
// We're being debugged if the P_TRACED flag is set
return ((info.kp_proc.p_flag & P_TRACED) != 0);
#else
return false;
#endif
}
}
namespace vk
{
void tracev(const char *format, va_list args)
{
#ifndef SWIFTSHADER_DISABLE_TRACE
if(false)
{
FILE *file = fopen(TRACE_OUTPUT_FILE, "a");
if(file)
{
vfprintf(file, format, args);
fclose(file);
}
}
#endif
}
void trace(const char *format, ...)
{
va_list vararg;
va_start(vararg, format);
tracev(format, vararg);
va_end(vararg);
}
void warn(const char *format, ...)
{
va_list vararg;
va_start(vararg, format);
tracev(format, vararg);
va_end(vararg);
va_start(vararg, format);
vfprintf(stderr, format, vararg);
va_end(vararg);
}
void abort(const char *format, ...)
{
va_list vararg;
va_start(vararg, format);
tracev(format, vararg);
va_end(vararg);
va_start(vararg, format);
vfprintf(stderr, format, vararg);
va_end(vararg);
::abort();
}
void trace_assert(const char *format, ...)
{
static std::atomic<bool> asserted = {false};
va_list vararg;
va_start(vararg, format);
if (IsUnderDebugger() && !asserted.exchange(true))
{
// Abort after tracing and printing to stderr
tracev(format, vararg);
va_end(vararg);
va_start(vararg, format);
vfprintf(stderr, format, vararg);
va_end(vararg);
::abort();
}
else if (!asserted)
{
tracev(format, vararg);
va_end(vararg);
}
}
}