mirror of
https://github.com/ashinn/chibi-scheme.git
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75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/* debug.c -- optional debugging utilities */
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/* Copyright (c) 2009 Alex Shinn. All rights reserved. */
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/* BSD-style license: http://synthcode.com/license.txt */
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static const char* reverse_opcode_names[] =
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{"NOOP", "RAISE", "RESUMECC", "CALLCC", "APPLY1", "TAIL-CALL", "CALL",
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"FCALL0", "FCALL1", "FCALL2", "FCALL3", "FCALL4", "FCALL5", "FCALL6",
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"EVAL", "JUMP-UNLESS",
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"JUMP", "PUSH", "DROP", "GLOBAL-REF", "GLOBAL-KNOWN-REF", "STACK-REF",
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"LOCAL-REF", "LOCAL-SET",
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"CLOSURE-REF", "VECTOR-REF", "VECTOR-SET", "VECTOR-LENGTH", "STRING-REF",
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"STRING-SET", "STRING-LENGTH", "MAKE-PROCEDURE", "MAKE-VECTOR", "AND",
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"NULL?", "FIXNUM?", "SYMBOL?", "CHAR?",
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"EOF?", "TYPEP", "CAR", "CDR", "SET-CAR", "SET-CDR", "CONS", "ADD", "SUB",
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"MUL", "DIV", "QUOTIENT", "REMAINDER", "NEGATIVE", "INVERSE",
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"LT", "LE", "EQN", "EQ",
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"EXACT->INEXACT", "INEXACT->EXACT",
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"CHAR->INTEGER", "INTEGER->CHAR", "CHAR-UPCASE", "CHAR-DOWNCASE",
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"DISPLAY", "WRITE", "WRITE-CHAR",
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"NEWLINE", "FLUSH-OUTPUT", "READ", "READ-CHAR", "PEEK-CHAR", "RET", "DONE",
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};
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static sexp sexp_disasm (sexp ctx, sexp bc, sexp out) {
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unsigned char *ip, opcode;
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if (sexp_procedurep(bc))
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bc = sexp_procedure_code(bc);
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ip = sexp_bytecode_data(bc);
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loop:
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opcode = *ip++;
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if (opcode*sizeof(char*) < sizeof(reverse_opcode_names)) {
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sexp_printf(out, " %s ", reverse_opcode_names[opcode]);
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} else {
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sexp_printf(out, " <unknown> %d ", opcode);
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}
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switch (opcode) {
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case OP_STACK_REF:
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case OP_LOCAL_REF:
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case OP_LOCAL_SET:
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case OP_CLOSURE_REF:
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case OP_JUMP:
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case OP_JUMP_UNLESS:
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case OP_FCALL0:
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case OP_FCALL1:
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case OP_FCALL2:
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case OP_FCALL3:
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case OP_TYPEP:
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sexp_printf(out, "%ld", (sexp_sint_t) ((sexp*)ip)[0]);
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ip += sizeof(sexp);
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break;
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case OP_GLOBAL_REF:
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case OP_GLOBAL_KNOWN_REF:
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case OP_TAIL_CALL:
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case OP_CALL:
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case OP_PUSH:
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sexp_write(((sexp*)ip)[0], out);
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ip += sizeof(sexp);
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break;
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}
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sexp_write_char('\n', out);
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if (ip - sexp_bytecode_data(bc) < sexp_bytecode_length(bc))
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goto loop;
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return SEXP_VOID;
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}
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#ifdef DEBUG_VM
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static void sexp_print_stack (sexp *stack, int top, int fp, sexp out) {
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int i;
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for (i=0; i<top; i++) {
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sexp_printf(out, "%s %02d: ", ((i==fp) ? "*" : " "), i);
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sexp_write(stack[i], out);
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sexp_printf(out, "\n");
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}
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}
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#endif
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