mirror of
https://github.com/nunuhara/xsystem4.git
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Nunuhara Cabbage
76f7e21c95
Stack traces now list addresses in addition to function names. Additionally, debugger stack traces number each frame, and the numbers can be used together with the PRINT-LOCALS function to print the values of local variables for any frame on the stack.
136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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*
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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 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://gnu.org/licenses/>.
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*/
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#ifndef SYSTEM4_VM_H
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#define SYSTEM4_VM_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "system4.h"
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struct ain;
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enum ain_data_type;
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struct page;
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struct string;
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// Non-heap values. Stored in pages and on the stack.
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union vm_value {
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int32_t i;
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float f;
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void *ref; // for casting HLL return value
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};
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struct static_hll_function {
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char *name;
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void *fun;
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};
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struct static_library {
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char *name;
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struct static_hll_function functions[];
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};
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struct ain *ain;
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union vm_value *stack;
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int32_t stack_ptr;
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static inline union vm_value _vm_id(union vm_value v)
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{
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return v;
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}
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static inline union vm_value vm_int(int32_t v)
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{
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return (union vm_value) { .i = v };
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}
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static inline union vm_value vm_bool(bool b)
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{
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return (union vm_value) { .i = !!b };
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}
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static inline union vm_value vm_float(float v)
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{
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return (union vm_value) { .f = v };
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}
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#define vm_value_cast(v) _Generic((v), \
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union vm_value: _vm_id, \
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int32_t: vm_int, \
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bool: vm_bool, \
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float: vm_float)(v)
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static inline void stack_set_value(int n, union vm_value v)
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{
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stack[stack_ptr - (1 + n)] = v;
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}
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static inline void stack_push_value(union vm_value v)
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{
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stack[stack_ptr++] = v;
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}
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// Set the Nth value from the top of the stack to V.
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#define stack_set(n, v) (stack_set_value((n), vm_value_cast(v)))
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#define stack_push(v) (stack_push_value(vm_value_cast(v)))
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union vm_value stack_pop(void);
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union vm_value global_get(int varno);
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void global_set(int varno, union vm_value val);
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struct page *local_page(void);
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int vm_string_ref(struct string *s);
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int vm_copy_page(struct page *page);
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union vm_value vm_copy(union vm_value v, enum ain_data_type type);
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int vm_execute_ain(struct ain *program);
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void vm_call(int fno, int struct_page);
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int vm_time(void);
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void hll_call(int libno, int fno);
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void link_libraries(void);
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bool library_exists(int libno);
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bool library_function_exists(int libno, int fno);
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void vm_stack_trace(void);
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noreturn void _vm_error(const char *fmt, ...);
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noreturn void vm_exit(int code);
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#define VM_ERROR(fmt, ...) \
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_vm_error("*ERROR*(%s:%s:%d): " fmt "\n", __FILE__, __func__, __LINE__, ##__VA_ARGS__)
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#ifdef VM_PRIVATE
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struct function_call {
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int32_t fno;
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uint32_t call_address;
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uint32_t return_address;
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int32_t page_slot;
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int32_t struct_page;
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};
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struct function_call call_stack[4096];
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int32_t call_stack_ptr;
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size_t instr_ptr;
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int vm_save_image(const char *key, const char *path);
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void vm_load_image(const char *key, const char *path);
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#endif /* VM_PRIVATE */
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#endif /* SYSTEM4_VM_H */
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