ocaml/byterun/instrtrace.c

/* Trace the instructions executed */

#ifdef DEBUG

#include <stdio.h>
#include "instruct.h"
#include "misc.h"
#include "mlvalues.h"
#include "opnames.h"

extern code_t start_code;
extern char * names_of_cprim[];

long icount = 0;

void stop_here () {}

int trace_flag = 0;

void disasm_instr(pc)
     code_t pc;
{
  int instr = *pc;
  printf("%6d  %s", pc - start_code,
         instr < 0 || instr > STOP ? "???" : names_of_instructions[instr]);
  pc++;
  switch(instr) {
      /* Instructions with one integer operand */
    case PUSHACC: case ACC: case POP: case ASSIGN:
    case PUSHENVACC: case ENVACC: case PUSH_RETADDR: case APPLY:
    case APPTERM1: case APPTERM2: case APPTERM3: case RETURN:
    case GRAB: case PUSHGETGLOBAL: case GETGLOBAL: case SETGLOBAL:
    case PUSHATOM: case ATOM: case MAKEBLOCK1: case MAKEBLOCK2:
    case MAKEBLOCK3: case GETFIELD: case SETFIELD: case DUMMY:
    case BRANCH: case BRANCHIF: case BRANCHIFNOT: case PUSHTRAP:
    case CONSTINT: case PUSHCONSTINT: case OFFSETINT: case OFFSETREF:
      printf(" %d\n", pc[0]); break;
      /* Instructions with two operands */
    case APPTERM: case CLOSURE: case CLOSUREREC: case PUSHGETGLOBALFIELD:
    case GETGLOBALFIELD: case MAKEBLOCK:
      printf(" %d, %d\n", pc[0], pc[1]); break;
      /* Instructions with a C primitive as operand */
    case C_CALL1: case C_CALL2: case C_CALL3: case C_CALL4: case C_CALL5:
      printf(" %s\n", names_of_cprim[pc[0]]); break;
    case C_CALLN:
      printf(" %d, %s\n", pc[0], names_of_cprim[pc[1]]); break;
    default:
      printf("\n");
    }
}

#endif