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/* GRT stack implementation for Win32 using fibers.
Copyright (C) 2005 - 2014 Tristan Gingold.
GHDL is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
As a special exception, if other files instantiate generics from this
unit, or you link this unit with other files to produce an executable,
this unit does not by itself cause the resulting executable to be
covered by the GNU General Public License. This exception does not
however invalidate any other reasons why the executable file might be
covered by the GNU Public License.
*/
#include <windows.h>
#include <winbase.h>
#include <dbghelp.h>
#include <stdio.h>
#include <setjmp.h>
#include <assert.h>
#include <excpt.h>
#include "grt_itf.h"
static int run_env_en;
static jmp_buf run_env;
static EXCEPTION_DISPOSITION
ghdl_SEH_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
void *EstablisherFrame,
struct _CONTEXT* ContextRecord,
void *DispatcherContext);
struct exception_registration
{
struct exception_registration *prev;
void *handler;
};
/* Save bactktrace from CTXT to BT, the first SKIP frames are skipped.
We need to use StackWalk64 as apparently CaptureStackBackTrace doesn't
work over JIT'ed code. I suppose it checks whether PC belongs to the text
section of an image. */
static void
get_bt_from_context (struct backtrace_addrs *bt, CONTEXT *ctxt, int skip)
{
STACKFRAME64 frame;
unsigned mach;
bt->size = 0;
bt->skip = 0;
memset (&frame, 0, sizeof (frame));
#ifdef __i386__
mach = IMAGE_FILE_MACHINE_I386;
frame.AddrPC.Offset = ctxt->Eip;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrFrame.Offset = ctxt->Ebp;
frame.AddrFrame.Mode = AddrModeFlat;
frame.AddrStack.Offset = ctxt->Esp;
frame.AddrStack.Mode = AddrModeFlat;
#elif defined (__x86_64__)
mach = IMAGE_FILE_MACHINE_AMD64;
frame.AddrPC.Offset = ctxt->Rip;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrFrame.Offset = ctxt->Rsp;
frame.AddrFrame.Mode = AddrModeFlat;
frame.AddrStack.Offset = ctxt->Rsp;
frame.AddrStack.Mode = AddrModeFlat;
#else
# warning "platform not supported"
return;
#endif
while (bt->size < sizeof (bt->addrs) / sizeof (bt->addrs[0]))
{
if (skip > 0)
skip--;
else
bt->addrs[bt->size++] = (void *) frame.AddrPC.Offset;
if (!StackWalk64 (mach, GetCurrentProcess (), GetCurrentThread (),
&frame, ctxt, NULL, NULL, NULL, NULL))
break;
}
}
static EXCEPTION_DISPOSITION
ghdl_SEH_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
void *EstablisherFrame,
struct _CONTEXT* ContextRecord,
void *DispatcherContext)
{
struct backtrace_addrs bt;
const char *msg = "";
switch (ExceptionRecord->ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
/* Pc is ExceptionRecord->ExceptionAddress. */
get_bt_from_context (&bt, ContextRecord, 1);
grt_null_access_error (&bt);
break;
case EXCEPTION_FLT_DENORMAL_OPERAND:
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_FLT_INVALID_OPERATION:
case EXCEPTION_FLT_OVERFLOW:
case EXCEPTION_FLT_STACK_CHECK:
case EXCEPTION_FLT_UNDERFLOW:
msg = "floating point error";
break;
case EXCEPTION_INT_DIVIDE_BY_ZERO:
msg = "division by 0";
break;
case EXCEPTION_INT_OVERFLOW:
get_bt_from_context (&bt, ContextRecord, 1);
grt_overflow_error (&bt);
break;
case EXCEPTION_STACK_OVERFLOW:
msg = "stack overflow";
break;
default:
msg = "unknown reason";
break;
}
/* FIXME: is it correct? */
fprintf (stderr, "exception raised: %s\n", msg);
__ghdl_maybe_return_via_longjump (1);
return 0; /* This is never reached, avoid compiler warning */
}
void
__ghdl_maybe_return_via_longjump (int val)
{
if (run_env_en)
longjmp (run_env, val);
}
int
__ghdl_run_through_longjump (int (*func)(void))
{
int res;
#ifdef __i386__
/* Install an SEH handler. */
struct exception_registration er;
struct exception_registration *prev;
/* Get current handler. */
asm volatile ("mov %%fs:(0),%0" : "=r" (prev));
/* Build regisration. */
er.prev = prev;
er.handler = ghdl_SEH_handler;
/* Register. */
asm volatile ("mov %0,%%fs:(0)" : : "r" (&er));
#endif
run_env_en = 1;
res = setjmp (run_env);
if (res == 0)
res = (*func)();
run_env_en = 0;
#ifdef __i386__
/* Restore. */
asm volatile ("mov %0,%%fs:(0)" : : "r" (prev));
#endif
return res;
}
void
grt_save_backtrace (struct backtrace_addrs *bt, int skip)
{
CONTEXT ctxt;
RtlCaptureContext (&ctxt);
get_bt_from_context (bt, &ctxt, skip + 1);
}
#include <math.h>
double acosh (double x)
{
return log (x + sqrt (x*x - 1));
}
double asinh (double x)
{
return log (x + sqrt (x*x + 1));
}
double atanh (double x)
{
return log ((1 + x) / (1 - x)) / 2;
}
#ifndef WITH_GNAT_RUN_TIME
void __gnat_raise_storage_error(void)
{
abort ();
}
void __gnat_raise_program_error(void)
{
abort ();
}
#endif
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