// If si_code values are available for all signals, use those.
DWORD CONTEXTGetExceptionCodeForSignal(const siginfo_t *siginfo,
const native_context_t *context)
{
// IMPORTANT NOTE: This function must not call any signal unsafe functions
// since it is called from signal handlers.
// That includes ASSERT and TRACE macros.
switch (siginfo->si_signo)
{
case SIGILL:
switch (siginfo->si_code)
{
case ILL_ILLOPC: // Illegal opcode
case ILL_ILLOPN: // Illegal operand
case ILL_ILLADR: // Illegal addressing mode
case ILL_ILLTRP: // Illegal trap
case ILL_COPROC: // Co-processor error
return EXCEPTION_ILLEGAL_INSTRUCTION;
case ILL_PRVOPC: // Privileged opcode
case ILL_PRVREG: // Privileged register
return EXCEPTION_PRIV_INSTRUCTION;
case ILL_BADSTK: // Internal stack error
return EXCEPTION_STACK_OVERFLOW;
default:
break;
}
break;
case SIGFPE:
switch (siginfo->si_code)
{
case FPE_INTDIV:
return EXCEPTION_INT_DIVIDE_BY_ZERO;
case FPE_INTOVF:
return EXCEPTION_INT_OVERFLOW;
case FPE_FLTDIV:
return EXCEPTION_FLT_DIVIDE_BY_ZERO;
case FPE_FLTOVF:
return EXCEPTION_FLT_OVERFLOW;
case FPE_FLTUND:
return EXCEPTION_FLT_UNDERFLOW;
case FPE_FLTRES:
return EXCEPTION_FLT_INEXACT_RESULT;
case FPE_FLTINV:
return EXCEPTION_FLT_INVALID_OPERATION;
case FPE_FLTSUB:
return EXCEPTION_FLT_INVALID_OPERATION;
default:
break;
}
break;
case SIGSEGV:
switch (siginfo->si_code)
{
case SI_USER: // User-generated signal, sometimes sent
// for SIGSEGV under normal circumstances
case SEGV_MAPERR: // Address not mapped to object
case SEGV_ACCERR: // Invalid permissions for mapped object
return EXCEPTION_ACCESS_VIOLATION;
#ifdef SI_KERNEL
case SI_KERNEL:
{
// Identify privileged instructions that are not identified as such by the system
if (g_getGcMarkerExceptionCode != nullptr)
{
DWORD exceptionCode = g_getGcMarkerExceptionCode(GetNativeContextPC(context));
if (exceptionCode != 0)
{
return exceptionCode;
}
}
return EXCEPTION_ACCESS_VIOLATION;
}
#endif
default:
break;
}
break;
case SIGBUS:
switch (siginfo->si_code)
{
case BUS_ADRALN: // Invalid address alignment
return EXCEPTION_DATATYPE_MISALIGNMENT;
case BUS_ADRERR: // Non-existent physical address
return EXCEPTION_ACCESS_VIOLATION;
case BUS_OBJERR: // Object-specific hardware error
default:
break;
}
case SIGTRAP:
switch (siginfo->si_code)
{
#ifdef SI_KERNEL
case SI_KERNEL:
#endif
case SI_USER:
case TRAP_BRKPT: // Process breakpoint
return EXCEPTION_BREAKPOINT;
case TRAP_TRACE: // Process trace trap
return EXCEPTION_SINGLE_STEP;
default:
// Got unknown SIGTRAP signal with code siginfo->si_code;
return EXCEPTION_ILLEGAL_INSTRUCTION;
}
default:
break;
}
// Got unknown signal number siginfo->si_signo with code siginfo->si_code;
return EXCEPTION_ILLEGAL_INSTRUCTION;
}
// If si_code values are available for all signals, use those.
DWORD CONTEXTGetExceptionCodeForSignal(const siginfo_t *siginfo,
const native_context_t *context)
{
switch (siginfo->si_signo)
{
case SIGILL:
switch (siginfo->si_code)
{
case ILL_ILLOPC: // Illegal opcode
case ILL_ILLOPN: // Illegal operand
case ILL_ILLADR: // Illegal addressing mode
case ILL_ILLTRP: // Illegal trap
case ILL_COPROC: // Co-processor error
return EXCEPTION_ILLEGAL_INSTRUCTION;
case ILL_PRVOPC: // Privileged opcode
case ILL_PRVREG: // Privileged register
return EXCEPTION_PRIV_INSTRUCTION;
case ILL_BADSTK: // Internal stack error
return EXCEPTION_STACK_OVERFLOW;
default:
break;
}
break;
case SIGFPE:
switch (siginfo->si_code)
{
case FPE_INTDIV:
return EXCEPTION_INT_DIVIDE_BY_ZERO;
case FPE_INTOVF:
return EXCEPTION_INT_OVERFLOW;
case FPE_FLTDIV:
return EXCEPTION_FLT_DIVIDE_BY_ZERO;
case FPE_FLTOVF:
return EXCEPTION_FLT_OVERFLOW;
case FPE_FLTUND:
return EXCEPTION_FLT_UNDERFLOW;
case FPE_FLTRES:
return EXCEPTION_FLT_INEXACT_RESULT;
case FPE_FLTINV:
return EXCEPTION_FLT_INVALID_OPERATION;
case FPE_FLTSUB:
return EXCEPTION_FLT_INVALID_OPERATION;
default:
break;
}
break;
case SIGSEGV:
switch (siginfo->si_code)
{
case SI_USER: // User-generated signal, sometimes sent
// for SIGSEGV under normal circumstances
case SEGV_MAPERR: // Address not mapped to object
case SEGV_ACCERR: // Invalid permissions for mapped object
return EXCEPTION_ACCESS_VIOLATION;
case SI_KERNEL:
{
// Identify privileged instructions that are not identified as such by the system
if (g_getGcMarkerExceptionCode != nullptr)
{
DWORD exceptionCode = g_getGcMarkerExceptionCode(GetNativeContextPC(context));
if (exceptionCode != 0)
{
return exceptionCode;
}
}
// fall through
}
default:
break;
}
break;
case SIGBUS:
switch (siginfo->si_code)
{
case BUS_ADRALN: // Invalid address alignment
return EXCEPTION_DATATYPE_MISALIGNMENT;
case BUS_ADRERR: // Non-existent physical address
return EXCEPTION_ACCESS_VIOLATION;
case BUS_OBJERR: // Object-specific hardware error
default:
break;
}
case SIGTRAP:
switch (siginfo->si_code)
{
case SI_KERNEL:
case SI_USER:
case TRAP_BRKPT: // Process breakpoint
return EXCEPTION_BREAKPOINT;
case TRAP_TRACE: // Process trace trap
return EXCEPTION_SINGLE_STEP;
default:
// We don't want to use ASSERT here since it raises SIGTRAP and we
// might again end up here resulting in an infinite loop!
// so, we print out an error message and return
DBG_PRINTF(DLI_ASSERT, defdbgchan, TRUE)
("Got unknown SIGTRAP signal (%d) with code %d\n", SIGTRAP, siginfo->si_code);
return EXCEPTION_ILLEGAL_INSTRUCTION;
}
default:
break;
}
ASSERT("Got unknown signal number %d with code %d\n",
siginfo->si_signo, siginfo->si_code);
return EXCEPTION_ILLEGAL_INSTRUCTION;
}