c4d22f9d24
* BUG: Forbid continuing and stay in debugger when an unhandled error is raised. This prevent crashes when an error occurs during variable initialization. git-svn-id: svn://localhost/gambas/trunk@8031 867c0c6c-44f3-4631-809d-bfa615b0a4ec
136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/***************************************************************************
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gbx_stack.h
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(c) 2000-2013 Benoît Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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***************************************************************************/
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#ifndef __GBX_STACK_H
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#define __GBX_STACK_H
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#include "gbx_value.h"
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#include "gb_pcode.h"
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//#define DEBUG_STACK 1
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typedef
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struct {
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void *cp;
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void *fp;
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void *pc;
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}
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STACK_BACKTRACE;
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typedef
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struct _stack_context {
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struct _stack_context *next;
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VALUE *bp; // local variables
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VALUE *pp; // local parameters
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CLASS *cp; // current class
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char *op; // current object
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VALUE *ep; // error pointer
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FUNCTION *fp; // current function
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PCODE *pc; // instruction
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PCODE *ec; // instruction if error
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PCODE *et; // TRY save
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VALUE *gp; // GOSUB stack pointer
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}
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STACK_CONTEXT;
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#ifndef __GBX_STACK_C
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EXTERN char *STACK_base;
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EXTERN size_t STACK_size;
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EXTERN char *STACK_limit;
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//EXTERN size_t STACK_relocate;
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EXTERN int STACK_frame_count;
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EXTERN STACK_CONTEXT *STACK_frame;
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EXTERN uintptr_t STACK_process_stack_limit;
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#endif
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#define STACK_FOR_EVAL 16
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void STACK_init(void);
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void STACK_exit(void);
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#if DEBUG_STACK
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bool STACK_check(int need);
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#else
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#define STACK_check(_need) \
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do { \
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if (((char *)(SP + (_need)) + sizeof(STACK_CONTEXT)) >= STACK_limit) \
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THROW_STACK(); \
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} \
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while (0);
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#endif
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void STACK_push_frame(STACK_CONTEXT *context, int check);
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void STACK_pop_frame(STACK_CONTEXT *context);
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bool STACK_has_error_handler(void);
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STACK_BACKTRACE *STACK_get_backtrace(void);
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#define STACK_free_backtrace(_backtrace) FREE(_backtrace)
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#define STACK_backtrace_is_end(_bt) ((((intptr_t)((_bt)->cp)) & 1) != 0)
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#define STACK_backtrace_set_end(_bt) ((_bt)->cp = (void *)(((intptr_t)((_bt)->cp)) | 1))
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#define STACK_backtrace_clear_end(_bt) ((_bt)->cp = (void *)(((intptr_t)((_bt)->cp)) & ~1))
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STACK_CONTEXT *STACK_get_frame(int frame);
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#define STACK_get_previous_pc() ((STACK_frame_count <= 0) ? NULL : STACK_frame->pc)
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#define STACK_get_current() ((STACK_frame_count > 0) ? STACK_frame : NULL)
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#define STACK_copy(_dst, _src) *(_dst) = *(_src)
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#define STACK_push_frame(_context, _need) \
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({ \
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int stack; \
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\
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if ((uintptr_t)&stack < STACK_process_stack_limit) \
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THROW_STACK(); \
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\
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STACK_check(_need); \
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\
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STACK_frame--; \
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\
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STACK_copy(STACK_frame, _context); \
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\
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STACK_frame_count++; \
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STACK_limit -= sizeof(STACK_CONTEXT); \
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})
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#define STACK_pop_frame(_context) \
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({ \
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STACK_copy(_context, STACK_frame); \
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STACK_frame++; \
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STACK_frame_count--; \
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STACK_limit += sizeof(STACK_CONTEXT); \
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})
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#define STACK_enable_for_eval() STACK_limit += STACK_FOR_EVAL * sizeof(VALUE)
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#define STACK_disable_for_eval() STACK_limit -= STACK_FOR_EVAL * sizeof(VALUE)
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#endif
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