/*
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* Created by Phil on 27/12/2010.
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* Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*
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*/
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#include "catch_debugger.h"
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#include "catch_errno_guard.h"
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#include "catch_stream.h"
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#include "catch_platform.h"
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#ifdef CATCH_PLATFORM_MAC
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# include <assert.h>
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# include <stdbool.h>
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# include <sys/types.h>
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# include <unistd.h>
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# include <sys/sysctl.h>
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# include <cstddef>
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# include <ostream>
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namespace Catch {
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// The following function is taken directly from the following technical note:
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// http://developer.apple.com/library/mac/#qa/qa2004/qa1361.html
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// Returns true if the current process is being debugged (either
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// running under the debugger or has a debugger attached post facto).
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bool isDebuggerActive(){
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int mib[4];
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struct kinfo_proc info;
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std::size_t size;
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// Initialize the flags so that, if sysctl fails for some bizarre
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// reason, we get a predictable result.
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info.kp_proc.p_flag = 0;
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// Initialize mib, which tells sysctl the info we want, in this case
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// we're looking for information about a specific process ID.
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROC;
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mib[2] = KERN_PROC_PID;
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mib[3] = getpid();
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// Call sysctl.
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size = sizeof(info);
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if( sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, nullptr, 0) != 0 ) {
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Catch::cerr() << "\n** Call to sysctl failed - unable to determine if debugger is active **\n" << std::endl;
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return false;
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}
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// We're being debugged if the P_TRACED flag is set.
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return ( (info.kp_proc.p_flag & P_TRACED) != 0 );
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}
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} // namespace Catch
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#elif defined(CATCH_PLATFORM_LINUX)
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#include <fstream>
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#include <string>
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namespace Catch{
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// The standard POSIX way of detecting a debugger is to attempt to
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// ptrace() the process, but this needs to be done from a child and not
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// this process itself to still allow attaching to this process later
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// if wanted, so is rather heavy. Under Linux we have the PID of the
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// "debugger" (which doesn't need to be gdb, of course, it could also
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// be strace, for example) in /proc/$PID/status, so just get it from
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// there instead.
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bool isDebuggerActive(){
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// Libstdc++ has a bug, where std::ifstream sets errno to 0
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// This way our users can properly assert over errno values
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ErrnoGuard guard;
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std::ifstream in("/proc/self/status");
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for( std::string line; std::getline(in, line); ) {
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static const int PREFIX_LEN = 11;
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if( line.compare(0, PREFIX_LEN, "TracerPid:\t") == 0 ) {
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// We're traced if the PID is not 0 and no other PID starts
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// with 0 digit, so it's enough to check for just a single
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// character.
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return line.length() > PREFIX_LEN && line[PREFIX_LEN] != '0';
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}
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}
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return false;
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}
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} // namespace Catch
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#elif defined(_MSC_VER)
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extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();
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namespace Catch {
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bool isDebuggerActive() {
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return IsDebuggerPresent() != 0;
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}
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}
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#elif defined(__MINGW32__)
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extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();
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namespace Catch {
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bool isDebuggerActive() {
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return IsDebuggerPresent() != 0;
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}
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}
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#else
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namespace Catch {
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bool isDebuggerActive() { return false; }
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}
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#endif // Platform
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