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execution_monitor.ipp
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execution_monitor.ipp
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// (C) Copyright Gennadiy Rozental 2001-2008.
// (C) Copyright Beman Dawes and Ullrich Koethe 1995-2001.
// Use, modification, and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org/libs/test for the library home page.
//
// File : $RCSfile$
//
// Version : $Revision: 57992 $
//
// Description : provides execution monitor implementation for all supported
// configurations, including Microsoft structured exception based, unix signals
// based and special workarounds for borland
//
// Note that when testing requirements or user wishes preclude use of this
// file as a separate compilation unit, it may be included as a header file.
//
// Header dependencies are deliberately restricted to reduce coupling to other
// boost libraries.
// ***************************************************************************
#ifndef BOOST_TEST_EXECUTION_MONITOR_IPP_012205GER
#define BOOST_TEST_EXECUTION_MONITOR_IPP_012205GER
// Boost.Test
#include <boost/test/detail/config.hpp>
#include <boost/test/detail/workaround.hpp>
#include <boost/test/execution_monitor.hpp>
#include <boost/test/debug.hpp>
// Boost
#include <boost/cstdlib.hpp> // for exit codes
#include <boost/config.hpp> // for workarounds
#include <boost/exception/get_error_info.hpp> // for get_error_info
#include <boost/exception/current_exception_cast.hpp> // for current_exception_cast
// STL
#include <string> // for std::string
#include <new> // for std::bad_alloc
#include <typeinfo> // for std::bad_cast, std::bad_typeid
#include <exception> // for std::exception, std::bad_exception
#include <stdexcept> // for std exception hierarchy
#include <cstring> // for C string API
#include <cassert> // for assert
#include <cstddef> // for NULL
#include <cstdio> // for vsnprintf
#include <cstdarg> // for varargs
#ifdef BOOST_NO_STDC_NAMESPACE
namespace std { using ::strerror; using ::strlen; using ::strncat; }
#endif
// to use vsnprintf
#if defined(__SUNPRO_CC) || defined(__SunOS) || defined(__QNXNTO__)
# include <stdio.h>
# include <stdarg.h>
using std::va_list;
#endif
#if defined(_WIN32) && !defined(BOOST_DISABLE_WIN32) && \
(!defined(__COMO__) && !defined(__MWERKS__) && !defined(__GNUC__) || \
BOOST_WORKAROUND(__MWERKS__, >= 0x3000))
# define BOOST_SEH_BASED_SIGNAL_HANDLING
# include <windows.h>
# if defined(__MWERKS__) || (defined(_MSC_VER) && !defined(UNDER_CE))
# include <eh.h>
# endif
# if defined(__BORLANDC__) && __BORLANDC__ >= 0x560 || defined(__MWERKS__)
# include <stdint.h>
# endif
# if defined(__BORLANDC__) && __BORLANDC__ < 0x560
typedef unsigned uintptr_t;
# endif
# if BOOST_WORKAROUND(_MSC_VER, < 1300 ) || defined(UNDER_CE)
typedef void* uintptr_t;
# endif
// for the FP control routines
#include <float.h>
#ifndef EM_INVALID
#define EM_INVALID _EM_INVALID
#endif
#ifndef EM_DENORMAL
#define EM_DENORMAL _EM_DENORMAL
#endif
#ifndef EM_ZERODIVIDE
#define EM_ZERODIVIDE _EM_ZERODIVIDE
#endif
#ifndef EM_OVERFLOW
#define EM_OVERFLOW _EM_OVERFLOW
#endif
#ifndef EM_UNDERFLOW
#define EM_UNDERFLOW _EM_UNDERFLOW
#endif
#ifndef MCW_EM
#define MCW_EM _MCW_EM
#endif
# if !defined(NDEBUG) && defined(_MSC_VER) && !defined(UNDER_CE)
# include <crtdbg.h>
# define BOOST_TEST_CRT_HOOK_TYPE _CRT_REPORT_HOOK
# define BOOST_TEST_CRT_ASSERT _CRT_ASSERT
# define BOOST_TEST_CRT_ERROR _CRT_ERROR
# define BOOST_TEST_CRT_SET_HOOK(H) _CrtSetReportHook(H)
# else
# define BOOST_TEST_CRT_HOOK_TYPE void*
# define BOOST_TEST_CRT_ASSERT 2
# define BOOST_TEST_CRT_ERROR 1
# define BOOST_TEST_CRT_SET_HOOK(H) (void*)(H)
# endif
# if !BOOST_WORKAROUND(_MSC_VER, >= 1400 ) || defined(UNDER_CE)
typedef void* _invalid_parameter_handler;
inline _invalid_parameter_handler
_set_invalid_parameter_handler( _invalid_parameter_handler arg )
{
return arg;
}
# endif
# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x0564)) || defined(UNDER_CE)
namespace { void _set_se_translator( void* ) {} }
# endif
#elif defined(BOOST_HAS_SIGACTION)
# define BOOST_SIGACTION_BASED_SIGNAL_HANDLING
# include <unistd.h>
# include <signal.h>
# include <setjmp.h>
# if defined(__FreeBSD__)
# ifndef SIGPOLL
# define SIGPOLL SIGIO
# endif
# if (__FreeBSD_version < 70100)
# define ILL_ILLADR 0 // ILL_RESAD_FAULT
# define ILL_PRVOPC ILL_PRIVIN_FAULT
# define ILL_ILLOPN 2 // ILL_RESOP_FAULT
# define ILL_COPROC ILL_FPOP_FAULT
# define BOOST_TEST_LIMITED_SIGNAL_DETAILS
# define BOOST_TEST_IGNORE_SIGCHLD
# endif
# endif
# if !defined(__CYGWIN__) && !defined(__QNXNTO__)
# define BOOST_TEST_USE_ALT_STACK
# endif
# if defined(SIGPOLL) && !defined(__CYGWIN__) && \
!(defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)) && \
!defined(__NetBSD__) && \
!defined(__QNXNTO__)
# define BOOST_TEST_CATCH_SIGPOLL
# endif
# ifdef BOOST_TEST_USE_ALT_STACK
# define BOOST_TEST_ALT_STACK_SIZE SIGSTKSZ
# endif
#else
# define BOOST_NO_SIGNAL_HANDLING
#endif
#ifndef UNDER_CE
#include <errno.h>
#endif
#include <boost/test/detail/suppress_warnings.hpp>
//____________________________________________________________________________//
namespace boost {
// ************************************************************************** //
// ************** report_error ************** //
// ************************************************************************** //
namespace detail {
#ifdef __BORLANDC__
# define BOOST_TEST_VSNPRINTF( a1, a2, a3, a4 ) std::vsnprintf( (a1), (a2), (a3), (a4) )
#elif BOOST_WORKAROUND(_MSC_VER, <= 1310) || \
BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3000)) || \
defined(UNDER_CE)
# define BOOST_TEST_VSNPRINTF( a1, a2, a3, a4 ) _vsnprintf( (a1), (a2), (a3), (a4) )
#else
# define BOOST_TEST_VSNPRINTF( a1, a2, a3, a4 ) vsnprintf( (a1), (a2), (a3), (a4) )
#endif
template <typename ErrorInfo>
typename ErrorInfo::value_type
extract( boost::exception const* ex )
{
if( !ex )
return 0;
typename ErrorInfo::value_type const * val = boost::get_error_info<ErrorInfo>( *ex );
return val ? *val : 0;
}
//____________________________________________________________________________//
static void
report_error( execution_exception::error_code ec, boost::exception const* be, char const* format, va_list* args )
{
static const int REPORT_ERROR_BUFFER_SIZE = 512;
static char buf[REPORT_ERROR_BUFFER_SIZE];
BOOST_TEST_VSNPRINTF( buf, sizeof(buf)-1, format, *args );
buf[sizeof(buf)-1] = 0;
va_end( *args );
throw execution_exception( ec, buf, execution_exception::location( extract<throw_file>( be ),
extract<throw_line>( be ),
extract<throw_function>( be ) ) );
}
//____________________________________________________________________________//
static void
report_error( execution_exception::error_code ec, char const* format, ... )
{
va_list args;
va_start( args, format );
report_error( ec, 0, format, &args );
}
//____________________________________________________________________________//
static void
report_error( execution_exception::error_code ec, boost::exception const* be, char const* format, ... )
{
va_list args;
va_start( args, format );
report_error( ec, be, format, &args );
}
//____________________________________________________________________________//
template<typename Tr,typename Functor>
inline int
do_invoke( Tr const& tr, Functor const& F )
{
return tr ? (*tr)( F ) : F();
}
//____________________________________________________________________________//
} // namespace detail
#if defined(BOOST_SIGACTION_BASED_SIGNAL_HANDLING)
// ************************************************************************** //
// ************** Sigaction based signal handling ************** //
// ************************************************************************** //
namespace detail {
// ************************************************************************** //
// ************** boost::detail::system_signal_exception ************** //
// ************************************************************************** //
class system_signal_exception {
public:
// Constructor
system_signal_exception()
: m_sig_info( 0 )
, m_context( 0 )
{}
// Access methods
void operator()( siginfo_t* i, void* c )
{
m_sig_info = i;
m_context = c;
}
void report() const;
private:
// Data members
siginfo_t* m_sig_info; // system signal detailed info
void* m_context; // signal context
};
//____________________________________________________________________________//
void
system_signal_exception::report() const
{
if( !m_sig_info )
return; // no error actually occur?
switch( m_sig_info->si_code ) {
case SI_USER:
report_error( execution_exception::system_error,
"signal: generated by kill() (or family); uid=%d; pid=%d",
(int)m_sig_info->si_uid, (int)m_sig_info->si_pid );
break;
case SI_QUEUE:
report_error( execution_exception::system_error,
"signal: sent by sigqueue()" );
break;
case SI_TIMER:
report_error( execution_exception::system_error,
"signal: the expiration of a timer set by timer_settimer()" );
break;
case SI_ASYNCIO:
report_error( execution_exception::system_error,
"signal: generated by the completion of an asynchronous I/O request" );
break;
case SI_MESGQ:
report_error( execution_exception::system_error,
"signal: generated by the the arrival of a message on an empty message queue" );
break;
default:
break;
}
switch( m_sig_info->si_signo ) {
case SIGILL:
switch( m_sig_info->si_code ) {
#ifndef BOOST_TEST_LIMITED_SIGNAL_DETAILS
case ILL_ILLOPC:
report_error( execution_exception::system_fatal_error,
"signal: illegal opcode; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case ILL_ILLTRP:
report_error( execution_exception::system_fatal_error,
"signal: illegal trap; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case ILL_PRVREG:
report_error( execution_exception::system_fatal_error,
"signal: privileged register; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case ILL_BADSTK:
report_error( execution_exception::system_fatal_error,
"signal: internal stack error; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
#endif
case ILL_ILLOPN:
report_error( execution_exception::system_fatal_error,
"signal: illegal operand; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case ILL_ILLADR:
report_error( execution_exception::system_fatal_error,
"signal: illegal addressing mode; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case ILL_PRVOPC:
report_error( execution_exception::system_fatal_error,
"signal: privileged opcode; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case ILL_COPROC:
report_error( execution_exception::system_fatal_error,
"signal: co-processor error; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
default:
report_error( execution_exception::system_fatal_error,
"signal: SIGILL, si_code: %d (illegal instruction; address of failing instruction: 0x%08lx)",
m_sig_info->si_addr, m_sig_info->si_code );
break;
}
break;
case SIGFPE:
switch( m_sig_info->si_code ) {
case FPE_INTDIV:
report_error( execution_exception::system_error,
"signal: integer divide by zero; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_INTOVF:
report_error( execution_exception::system_error,
"signal: integer overflow; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_FLTDIV:
report_error( execution_exception::system_error,
"signal: floating point divide by zero; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_FLTOVF:
report_error( execution_exception::system_error,
"signal: floating point overflow; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_FLTUND:
report_error( execution_exception::system_error,
"signal: floating point underflow; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_FLTRES:
report_error( execution_exception::system_error,
"signal: floating point inexact result; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_FLTINV:
report_error( execution_exception::system_error,
"signal: invalid floating point operation; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
case FPE_FLTSUB:
report_error( execution_exception::system_error,
"signal: subscript out of range; address of failing instruction: 0x%08lx",
m_sig_info->si_addr );
break;
default:
report_error( execution_exception::system_error,
"signal: SIGFPE, si_code: %d (errnoneous arithmetic operations; address of failing instruction: 0x%08lx)",
m_sig_info->si_addr, m_sig_info->si_code );
break;
}
break;
case SIGSEGV:
switch( m_sig_info->si_code ) {
#ifndef BOOST_TEST_LIMITED_SIGNAL_DETAILS
case SEGV_MAPERR:
report_error( execution_exception::system_fatal_error,
"memory access violation at address: 0x%08lx: no mapping at fault address",
m_sig_info->si_addr );
break;
case SEGV_ACCERR:
report_error( execution_exception::system_fatal_error,
"memory access violation at address: 0x%08lx: invalid permissions",
m_sig_info->si_addr );
break;
#endif
default:
report_error( execution_exception::system_fatal_error,
"signal: SIGSEGV, si_code: %d (memory access violation at address: 0x%08lx)",
m_sig_info->si_addr, m_sig_info->si_code );
break;
}
break;
case SIGBUS:
switch( m_sig_info->si_code ) {
#ifndef BOOST_TEST_LIMITED_SIGNAL_DETAILS
case BUS_ADRALN:
report_error( execution_exception::system_fatal_error,
"memory access violation at address: 0x%08lx: invalid address alignment",
m_sig_info->si_addr );
break;
case BUS_ADRERR:
report_error( execution_exception::system_fatal_error,
"memory access violation at address: 0x%08lx: non-existent physical address",
m_sig_info->si_addr );
break;
case BUS_OBJERR:
report_error( execution_exception::system_fatal_error,
"memory access violation at address: 0x%08lx: object specific hardware error",
m_sig_info->si_addr );
break;
#endif
default:
report_error( execution_exception::system_fatal_error,
"signal: SIGSEGV, si_code: %d (memory access violation at address: 0x%08lx)",
m_sig_info->si_addr, m_sig_info->si_code );
break;
}
break;
case SIGCHLD:
switch( m_sig_info->si_code ) {
#ifndef BOOST_TEST_LIMITED_SIGNAL_DETAILS
case CLD_EXITED:
report_error( execution_exception::system_error,
"child has exited; pid: %d; uid: %d; exit value: %d",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status );
break;
case CLD_KILLED:
report_error( execution_exception::system_error,
"child was killed; pid: %d; uid: %d; exit value: %d",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status );
break;
case CLD_DUMPED:
report_error( execution_exception::system_error,
"child terminated abnormally; pid: %d; uid: %d; exit value: %d",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status );
break;
case CLD_TRAPPED:
report_error( execution_exception::system_error,
"traced child has trapped; pid: %d; uid: %d; exit value: %d",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status );
break;
case CLD_STOPPED:
report_error( execution_exception::system_error,
"child has stopped; pid: %d; uid: %d; exit value: %d",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status );
break;
case CLD_CONTINUED:
report_error( execution_exception::system_error,
"stopped child had continued; pid: %d; uid: %d; exit value: %d",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status );
break;
#endif
default:
report_error( execution_exception::system_error,
"signal: SIGCHLD, si_code: %d (child process has terminated; pid: %d; uid: %d; exit value: %d)",
(int)m_sig_info->si_pid, (int)m_sig_info->si_uid, (int)m_sig_info->si_status, m_sig_info->si_code );
break;
}
break;
#if defined(BOOST_TEST_CATCH_SIGPOLL)
case SIGPOLL:
switch( m_sig_info->si_code ) {
#ifndef BOOST_TEST_LIMITED_SIGNAL_DETAILS
case POLL_IN:
report_error( execution_exception::system_error,
"data input available; band event %d",
(int)m_sig_info->si_band );
break;
case POLL_OUT:
report_error( execution_exception::system_error,
"output buffers available; band event %d",
(int)m_sig_info->si_band );
break;
case POLL_MSG:
report_error( execution_exception::system_error,
"input message available; band event %d",
(int)m_sig_info->si_band );
break;
case POLL_ERR:
report_error( execution_exception::system_error,
"i/o error; band event %d",
(int)m_sig_info->si_band );
break;
case POLL_PRI:
report_error( execution_exception::system_error,
"high priority input available; band event %d",
(int)m_sig_info->si_band );
break;
#if defined(POLL_ERR) && defined(POLL_HUP) && (POLL_ERR - POLL_HUP)
case POLL_HUP:
report_error( execution_exception::system_error,
"device disconnected; band event %d",
(int)m_sig_info->si_band );
break;
#endif
#endif
default:
report_error( execution_exception::system_error,
"signal: SIGPOLL, si_code: %d (asynchronous I/O event occured; band event %d)",
(int)m_sig_info->si_band, m_sig_info->si_code );
break;
}
break;
#endif
case SIGABRT:
report_error( execution_exception::system_error,
"signal: SIGABRT (application abort requested)" );
break;
case SIGALRM:
report_error( execution_exception::timeout_error,
"signal: SIGALRM (timeout while executing function)" );
break;
default:
report_error( execution_exception::system_error, "unrecognized signal" );
}
}
//____________________________________________________________________________//
// ************************************************************************** //
// ************** boost::detail::signal_action ************** //
// ************************************************************************** //
// Forward declaration
extern "C" {
static void execution_monitor_jumping_signal_handler( int sig, siginfo_t* info, void* context );
static void execution_monitor_attaching_signal_handler( int sig, siginfo_t* info, void* context );
}
class signal_action {
typedef struct sigaction* sigaction_ptr;
public:
//Constructor
signal_action();
signal_action( int sig, bool install, bool attach_dbg, char* alt_stack );
~signal_action();
private:
// Data members
int m_sig;
bool m_installed;
struct sigaction m_new_action;
struct sigaction m_old_action;
};
//____________________________________________________________________________//
signal_action::signal_action()
: m_installed( false )
{}
//____________________________________________________________________________//
signal_action::signal_action( int sig, bool install, bool attach_dbg, char* alt_stack )
: m_sig( sig )
, m_installed( install )
{
if( !install )
return;
std::memset( &m_new_action, 0, sizeof(struct sigaction) );
BOOST_TEST_SYS_ASSERT( ::sigaction( m_sig , sigaction_ptr(), &m_new_action ) != -1 );
if( m_new_action.sa_sigaction || m_new_action.sa_handler ) {
m_installed = false;
return;
}
m_new_action.sa_flags |= SA_SIGINFO;
m_new_action.sa_sigaction = attach_dbg ? &execution_monitor_attaching_signal_handler
: &execution_monitor_jumping_signal_handler;
BOOST_TEST_SYS_ASSERT( sigemptyset( &m_new_action.sa_mask ) != -1 );
#ifdef BOOST_TEST_USE_ALT_STACK
if( alt_stack )
m_new_action.sa_flags |= SA_ONSTACK;
#endif
BOOST_TEST_SYS_ASSERT( ::sigaction( m_sig, &m_new_action, &m_old_action ) != -1 );
}
//____________________________________________________________________________//
signal_action::~signal_action()
{
if( m_installed )
::sigaction( m_sig, &m_old_action , sigaction_ptr() );
}
//____________________________________________________________________________//
// ************************************************************************** //
// ************** boost::detail::signal_handler ************** //
// ************************************************************************** //
class signal_handler {
public:
// Constructor
explicit signal_handler( bool catch_system_errors, int timeout, bool attach_dbg, char* alt_stack );
// Destructor
~signal_handler();
// access methods
static sigjmp_buf& jump_buffer()
{
assert( !!s_active_handler );
return s_active_handler->m_sigjmp_buf;
}
static system_signal_exception& sys_sig()
{
assert( !!s_active_handler );
return s_active_handler->m_sys_sig;
}
private:
// Data members
signal_handler* m_prev_handler;
int m_timeout;
signal_action m_ILL_action;
signal_action m_FPE_action;
signal_action m_SEGV_action;
signal_action m_BUS_action;
signal_action m_CHLD_action;
signal_action m_POLL_action;
signal_action m_ABRT_action;
signal_action m_ALRM_action;
sigjmp_buf m_sigjmp_buf;
system_signal_exception m_sys_sig;
static signal_handler* s_active_handler;
};
// !! need to be placed in thread specific storage
typedef signal_handler* signal_handler_ptr;
signal_handler* signal_handler::s_active_handler = signal_handler_ptr();
//____________________________________________________________________________//
signal_handler::signal_handler( bool catch_system_errors, int timeout, bool attach_dbg, char* alt_stack )
: m_prev_handler( s_active_handler )
, m_timeout( timeout )
, m_ILL_action ( SIGILL , catch_system_errors, attach_dbg, alt_stack )
, m_FPE_action ( SIGFPE , catch_system_errors, attach_dbg, alt_stack )
, m_SEGV_action( SIGSEGV, catch_system_errors, attach_dbg, alt_stack )
, m_BUS_action ( SIGBUS , catch_system_errors, attach_dbg, alt_stack )
#ifndef BOOST_TEST_IGNORE_SIGCHLD
, m_CHLD_action( SIGCHLD, catch_system_errors, attach_dbg, alt_stack )
#endif
#ifdef BOOST_TEST_CATCH_SIGPOLL
, m_POLL_action( SIGPOLL, catch_system_errors, attach_dbg, alt_stack )
#endif
, m_ABRT_action( SIGABRT, catch_system_errors, attach_dbg, alt_stack )
, m_ALRM_action( SIGALRM, timeout > 0 , attach_dbg, alt_stack )
{
s_active_handler = this;
if( m_timeout > 0 ) {
::alarm( 0 );
::alarm( timeout );
}
#ifdef BOOST_TEST_USE_ALT_STACK
if( alt_stack ) {
stack_t sigstk;
std::memset( &sigstk, 0, sizeof(stack_t) );
BOOST_TEST_SYS_ASSERT( ::sigaltstack( 0, &sigstk ) != -1 );
if( sigstk.ss_flags & SS_DISABLE ) {
sigstk.ss_sp = alt_stack;
sigstk.ss_size = BOOST_TEST_ALT_STACK_SIZE;
sigstk.ss_flags = 0;
BOOST_TEST_SYS_ASSERT( ::sigaltstack( &sigstk, 0 ) != -1 );
}
}
#endif
}
//____________________________________________________________________________//
signal_handler::~signal_handler()
{
assert( s_active_handler == this );
if( m_timeout > 0 )
::alarm( 0 );
#ifdef BOOST_TEST_USE_ALT_STACK
#ifdef __GNUC__
// We shouldn't need to explicitly initialize all the members here,
// but gcc warns if we don't, so add initializers for each of the
// members specified in the POSIX std:
stack_t sigstk = { 0, 0, 0 };
#else
stack_t sigstk = { };
#endif
sigstk.ss_size = MINSIGSTKSZ;
sigstk.ss_flags = SS_DISABLE;
BOOST_TEST_SYS_ASSERT( ::sigaltstack( &sigstk, 0 ) != -1 );
#endif
s_active_handler = m_prev_handler;
}
//____________________________________________________________________________//
// ************************************************************************** //
// ************** execution_monitor_signal_handler ************** //
// ************************************************************************** //
extern "C" {
static bool ignore_sigchild( siginfo_t* info )
{
return info->si_signo == SIGCHLD
#ifndef BOOST_TEST_LIMITED_SIGNAL_DETAILS
&& info->si_code == CLD_EXITED
#endif
#ifdef BOOST_TEST_IGNORE_NON_ZERO_CHILD_CODE
;
#else
&& (int)info->si_status == 0;
#endif
}
//____________________________________________________________________________//
static void execution_monitor_jumping_signal_handler( int sig, siginfo_t* info, void* context )
{
if( ignore_sigchild( info ) )
return;
signal_handler::sys_sig()( info, context );
siglongjmp( signal_handler::jump_buffer(), sig );
}
//____________________________________________________________________________//
static void execution_monitor_attaching_signal_handler( int sig, siginfo_t* info, void* context )
{
if( ignore_sigchild( info ) )
return;
if( !debug::attach_debugger( false ) )
execution_monitor_jumping_signal_handler( sig, info, context );
// debugger attached; it will handle the signal
BOOST_TEST_SYS_ASSERT( ::signal( sig, SIG_DFL ) != SIG_ERR );
}
//____________________________________________________________________________//
}
} // namespace detail
// ************************************************************************** //
// ************** execution_monitor::catch_signals ************** //
// ************************************************************************** //
int
execution_monitor::catch_signals( unit_test::callback0<int> const& F )
{
using namespace detail;
#if defined(__CYGWIN__)
p_catch_system_errors.value = false;
#endif
#ifdef BOOST_TEST_USE_ALT_STACK
if( !!p_use_alt_stack && !m_alt_stack )
m_alt_stack.reset( new char[BOOST_TEST_ALT_STACK_SIZE] );
#else
p_use_alt_stack.value = false;
#endif
signal_handler local_signal_handler( p_catch_system_errors, p_timeout, p_auto_start_dbg,
!p_use_alt_stack ? 0 : m_alt_stack.get() );
if( !sigsetjmp( signal_handler::jump_buffer(), 1 ) )
return detail::do_invoke( m_custom_translators , F );
else
throw local_signal_handler.sys_sig();
}
//____________________________________________________________________________//
#elif defined(BOOST_SEH_BASED_SIGNAL_HANDLING)
// ************************************************************************** //
// ************** Microsoft structured exception handling ************** //
// ************************************************************************** //
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x0564))
namespace { void _set_se_translator( void* ) {} }
#endif
namespace detail {
// ************************************************************************** //
// ************** boost::detail::system_signal_exception ************** //
// ************************************************************************** //
class system_signal_exception {
public:
// Constructor
explicit system_signal_exception( execution_monitor* em )
: m_em( em )
, m_se_id( 0 )
, m_fault_address( 0 )
, m_dir( false )
{}
void report() const;
int operator()( unsigned int id, _EXCEPTION_POINTERS* exps );
private:
// Data members
execution_monitor* m_em;
unsigned int m_se_id;
void* m_fault_address;
bool m_dir;
};
static void
seh_catch_preventer( unsigned int /* id */, _EXCEPTION_POINTERS* /* exps */ )
{
throw;
}
//____________________________________________________________________________//
int
system_signal_exception::operator()( unsigned int id, _EXCEPTION_POINTERS* exps )
{
const unsigned int MSFT_CPP_EXCEPT = 0xE06d7363; // EMSC
if( !m_em->p_catch_system_errors || (id == MSFT_CPP_EXCEPT) )
return EXCEPTION_CONTINUE_SEARCH;
if( !!m_em->p_auto_start_dbg && debug::attach_debugger( false ) ) {
m_em->p_catch_system_errors.value = false;
_set_se_translator( &seh_catch_preventer );
return EXCEPTION_CONTINUE_EXECUTION;
}
m_se_id = id;
if( m_se_id == EXCEPTION_ACCESS_VIOLATION && exps->ExceptionRecord->NumberParameters == 2 ) {
m_fault_address = (void*)exps->ExceptionRecord->ExceptionInformation[1];
m_dir = exps->ExceptionRecord->ExceptionInformation[0] == 0;
}
return EXCEPTION_EXECUTE_HANDLER;
}
//____________________________________________________________________________//
void
system_signal_exception::report() const
{
switch( m_se_id ) {
// cases classified as system_fatal_error
case EXCEPTION_ACCESS_VIOLATION: {
if( !m_fault_address )
detail::report_error( execution_exception::system_fatal_error, "memory access violation" );
else
detail::report_error(
execution_exception::system_fatal_error,
"memory access violation occurred at address 0x%08lx, while attempting to %s",
m_fault_address,
m_dir ? " read inaccessible data"
: " write to an inaccessible (or protected) address"
);
break;
}
case EXCEPTION_ILLEGAL_INSTRUCTION:
detail::report_error( execution_exception::system_fatal_error, "illegal instruction" );
break;
case EXCEPTION_PRIV_INSTRUCTION:
detail::report_error( execution_exception::system_fatal_error, "tried to execute an instruction whose operation is not allowed in the current machine mode" );
break;
case EXCEPTION_IN_PAGE_ERROR:
detail::report_error( execution_exception::system_fatal_error, "access to a memory page that is not present" );
break;
case EXCEPTION_STACK_OVERFLOW:
detail::report_error( execution_exception::system_fatal_error, "stack overflow" );
break;
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
detail::report_error( execution_exception::system_fatal_error, "tried to continue execution after a non continuable exception occurred" );
break;
// cases classified as (non-fatal) system_trap
case EXCEPTION_DATATYPE_MISALIGNMENT:
detail::report_error( execution_exception::system_error, "data misalignment" );