catch2/internal/catch_debugger.hpp

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/*
* catch_debugger.hpp
* Catch
*
* Created by Phil on 27/12/2010.
* Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*
* Provides a DebugBreak() macro for platforms other than Windows
* (currently only Macs are supported)
*/
#ifndef TWOBLUECUBES_CATCH_DEBUGGER_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_DEBUGGER_HPP_INCLUDED
#if defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
#include <assert.h>
#include <stdbool.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/sysctl.h>
namespace Catch
{
// The following function is taken directly from the following technical note:
// http://developer.apple.com/library/mac/#qa/qa2004/qa1361.html
inline bool AmIBeingDebugged(void)
// Returns true if the current process is being debugged (either
// running under the debugger or has a debugger attached post facto).
{
int junk;
int mib[4];
struct kinfo_proc info;
size_t size;
// Initialize the flags so that, if sysctl fails for some bizarre
// reason, we get a predictable result.
info.kp_proc.p_flag = 0;
// Initialize mib, which tells sysctl the info we want, in this case
// we're looking for information about a specific process ID.
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = getpid();
// Call sysctl.
size = sizeof(info);
junk = sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0);
assert(junk == 0);
// We're being debugged if the P_TRACED flag is set.
return ( (info.kp_proc.p_flag & P_TRACED) != 0 );
}
}
// The following code snippet taken from:
// http://cocoawithlove.com/2008/03/break-into-debugger.html
#ifdef DEBUG
#if __ppc64__ || __ppc__
#define DebugBreak() \
if( Catch::AmIBeingDebugged() ) \
{ \
__asm__("li r0, 20\nsc\nnop\nli r0, 37\nli r4, 2\nsc\nnop\n" \
: : : "memory","r0","r3","r4" ); \
}
#else
#define DebugBreak() if( Catch::AmIBeingDebugged() ) {__asm__("int $3\n" : : );}
#endif
#endif
#endif
#ifndef DebugBreak
#define DebugBreak()
#endif
#endif // TWOBLUECUBES_CATCH_DEBUGGER_HPP_INCLUDED