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* libguile/frames.c (scm_frame_return_values): New function, for use when a frame is at "return-values". (scm_init_frames_builtins): Register frame-return-values. * libguile/vm-engine.c (RETURN_HOOK): Rename from POP_CONTINUATION_HOOK. (call, call-label): Remove PUSH_CONTINUATION_HOOK; it's unneeded, as you can always check the FP from an apply hook. (return-values): Run return hook before popping frame. * libguile/vm.c (vm_dispatch_return_hook): Rename from vm_dispatch_pop_continuation_hook. Remove push continuation hook. (scm_vm_return_hook): * libguile/vm.h (SCM_VM_PUSH_CONTINUATION_HOOK): Remove. (SCM_VM_RETURN_HOOK): Rename from SCM_VM_POP_CONTINUATION_HOOK. * module/system/vm/frame.scm (frame-return-values): Export. * module/system/vm/trace.scm (print-return, trace-calls-to-procedure) (trace-calls-in-procedure): Adapt to not receiving values as arguments. * module/system/vm/traps.scm (trap-in-procedure, trap-frame-finish): Adapt to return hook coming from returning frame. (program-sources-by-line): Update to use match instead of pmatch. * module/system/vm/traps.scm (trap-in-dynamic-extent) (trap-calls-to-procedure): Adapt to return hook not receiving values. * module/system/vm/vm.scm: Remove push continuation hook and rename return hook.
131 lines
5.2 KiB
C
131 lines
5.2 KiB
C
/* Copyright 2001,2009-2015,2017-2018
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Free Software Foundation, Inc.
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This file is part of Guile.
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Guile is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Guile is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Guile. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SCM_VM_H_
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#define _SCM_VM_H_
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#include <setjmp.h>
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#include <libguile/gc.h>
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#include <libguile/programs.h>
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enum {
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SCM_VM_APPLY_HOOK,
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SCM_VM_RETURN_HOOK,
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SCM_VM_NEXT_HOOK,
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SCM_VM_ABORT_CONTINUATION_HOOK,
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SCM_VM_NUM_HOOKS,
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};
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#define SCM_VM_REGULAR_ENGINE 0
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#define SCM_VM_DEBUG_ENGINE 1
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#define SCM_VM_NUM_ENGINES 2
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enum scm_compare {
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SCM_F_COMPARE_NONE = 0x0,
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SCM_F_COMPARE_EQUAL = 0x1,
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SCM_F_COMPARE_LESS_THAN = 0x2,
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SCM_F_COMPARE_INVALID = 0x3
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};
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struct scm_vm {
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uint32_t *ip; /* instruction pointer */
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union scm_vm_stack_element *sp; /* stack pointer */
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union scm_vm_stack_element *fp; /* frame pointer */
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uint8_t compare_result; /* flags register: a value from scm_compare */
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union scm_vm_stack_element *stack_limit; /* stack limit address */
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int trace_level; /* traces enabled if trace_level > 0 */
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union scm_vm_stack_element *sp_min_since_gc; /* deepest sp since last gc */
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size_t stack_size; /* stack size */
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union scm_vm_stack_element *stack_bottom; /* lowest address in allocated stack */
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union scm_vm_stack_element *stack_top; /* highest address in allocated stack */
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SCM overflow_handler_stack; /* alist of max-stack-size -> thunk */
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SCM hooks[SCM_VM_NUM_HOOKS]; /* hooks */
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jmp_buf *registers; /* registers captured at latest vm entry */
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int engine; /* which vm engine we're using */
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};
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SCM_API SCM scm_call_with_vm (SCM proc, SCM args);
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SCM_API SCM scm_call_with_stack_overflow_handler (SCM limit, SCM thunk,
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SCM handler);
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SCM_API SCM scm_vm_apply_hook (void);
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SCM_API SCM scm_vm_return_hook (void);
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SCM_API SCM scm_vm_abort_continuation_hook (void);
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SCM_API SCM scm_vm_next_hook (void);
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SCM_API SCM scm_vm_trace_level (void);
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SCM_API SCM scm_set_vm_trace_level_x (SCM level);
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SCM_API SCM scm_vm_engine (void);
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SCM_API SCM scm_set_vm_engine_x (SCM engine);
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SCM_API SCM scm_set_default_vm_engine_x (SCM engine);
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SCM_API void scm_c_set_vm_engine_x (int engine);
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SCM_API void scm_c_set_default_vm_engine_x (int engine);
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SCM_INTERNAL void scm_i_vm_prepare_stack (struct scm_vm *vp);
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struct GC_ms_entry;
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SCM_INTERNAL struct GC_ms_entry * scm_i_vm_mark_stack (struct scm_vm *,
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struct GC_ms_entry *,
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struct GC_ms_entry *);
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SCM_INTERNAL void scm_i_vm_free_stack (struct scm_vm *vp);
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#define SCM_F_VM_CONT_PARTIAL 0x1
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#define SCM_F_VM_CONT_REWINDABLE 0x2
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struct scm_vm_cont {
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/* IP of newest frame. */
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uint32_t *ra;
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/* Offset of FP of newest frame, relative to stack top. */
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ptrdiff_t fp_offset;
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/* Besides being the stack size, this is also the offset of the SP of
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the newest frame. */
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ptrdiff_t stack_size;
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/* Stack bottom, which also keeps saved stack alive for GC. */
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union scm_vm_stack_element *stack_bottom;
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/* Saved dynamic stack, with prompts relocated to record saved SP/FP
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offsets from the stack top of this scm_vm_cont. */
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scm_t_dynstack *dynstack;
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/* See the continuation is partial and/or rewindable. */
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uint32_t flags;
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};
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#define SCM_VM_CONT_P(OBJ) (SCM_HAS_TYP7 (OBJ, scm_tc7_vm_cont))
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#define SCM_VM_CONT_DATA(CONT) ((struct scm_vm_cont *) SCM_CELL_WORD_1 (CONT))
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#define SCM_VM_CONT_PARTIAL_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_PARTIAL)
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#define SCM_VM_CONT_REWINDABLE_P(CONT) (SCM_VM_CONT_DATA (CONT)->flags & SCM_F_VM_CONT_REWINDABLE)
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SCM_API SCM scm_load_compiled_with_vm (SCM file);
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SCM_INTERNAL SCM scm_i_call_with_current_continuation (SCM proc);
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SCM_INTERNAL SCM scm_i_capture_current_stack (void);
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SCM_INTERNAL SCM scm_i_vm_capture_stack (union scm_vm_stack_element *stack_top,
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union scm_vm_stack_element *fp,
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union scm_vm_stack_element *sp,
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uint32_t *ra,
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scm_t_dynstack *dynstack,
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uint32_t flags);
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SCM_INTERNAL void scm_i_vm_abort (SCM *tag_and_argv, size_t n) SCM_NORETURN;
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SCM_INTERNAL int scm_i_vm_cont_to_frame (SCM cont, struct scm_frame *frame);
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SCM_INTERNAL void scm_i_vm_cont_print (SCM x, SCM port,
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scm_print_state *pstate);
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SCM_INTERNAL int scm_i_vm_is_boot_continuation_code (uint32_t *ip);
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SCM_INTERNAL void scm_bootstrap_vm (void);
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SCM_INTERNAL void scm_init_vm (void);
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#endif /* _SCM_VM_H_ */
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