pvmtrace.c

来自「一个开源的JAVA虚拟机」· C语言 代码 · 共 109 行

#include <aegisvm/pvm.h>

int
trace_pvm_init(void) {
  j_log("trace: initializing PVMs");
  return 0;
}

int
trace_pvm_finish(void) {
  j_log("trace: finishing PVMs");
  return 0;
}

const PREVI *
trace_pvm_verify(JArena *arena,
		const PREClassFile *classfile,
		const PREAnalysis **analyses) {
  JArena *tmp;
  PREWorkingVI *vi;
  const PREVI *V;
  PREArgument arg;

  j_log("trace: verifying class: %U",
	pre_classfile_this_class_name(classfile));
  /* Allocate tmp arena */
  tmp = j_arena_new();
  if (tmp == 0)
    return 0;
  /* Allocate working VI */
  vi = pre_working_vi_new(tmp, classfile);
  if (vi == 0)
    return 0;
  /* Class obligations */
  pre_argument_set_this(&arg);
  if (! pre_working_vi_formulate_class_obligation(vi, 0, 1, &arg))
    goto ErrorExit;
  /* Constants obligations */
  {
    ju2 count, i;
    count = pre_classfile_constant_pool_count(classfile);
    for (i = 1; i < count; i++) {
      const void *cp = pre_classfile_constant_pool_entry(classfile, i);
      if (cp != 0) {
	ju1 tag = pre_cp_tag(cp);
	switch (tag) {
	case J_CONSTANT_Class:
	  pre_argument_set_constant(&arg, i);
	  if (! pre_working_vi_formulate_constant_obligation(vi,i,1,1,&arg))
	    goto ErrorExit;
	  break;
	case J_CONSTANT_Fieldref:
	  pre_argument_set_constant(&arg, i);
	  if (! pre_working_vi_formulate_constant_obligation(vi,i,2,1,&arg))
	    goto ErrorExit;
	  break;
	case J_CONSTANT_Methodref:
	  pre_argument_set_constant(&arg, i);
	  if (! pre_working_vi_formulate_constant_obligation(vi,i,3,1,&arg))
	    goto ErrorExit;
	  break;
	case J_CONSTANT_InterfaceMethodref:
	  pre_argument_set_constant(&arg, i);
	  if (! pre_working_vi_formulate_constant_obligation(vi,i,4,1,&arg))
	    goto ErrorExit;
	  break;
	}
      }
    }
  }
  /* Fields obligations */
  {
    ju2 i, count;
    count = pre_classfile_fields_count(classfile);
    for (i = 0; i < count; i++) {
      pre_argument_set_field(&arg, i);
      if (! pre_working_vi_formulate_field_obligation(vi,i,5,1,&arg))
	goto ErrorExit;
    }
  }
  /* Methods obligations */
  {
    ju2 i, count;
    count = pre_classfile_methods_count(classfile);
    for (i = 0; i < count; i++) {
      pre_argument_set_method(&arg, i);
      if (! pre_working_vi_formulate_method_obligation(vi,i,6,1,&arg))
	goto ErrorExit;
    }
  }
  /* Archive result */
  V = pre_vi_new(arena, vi, 0);
  if (V == 0)
    goto ErrorExit;
  j_arena_delete(tmp);
  return V;
 ErrorExit:
  j_arena_delete(tmp);
  return 0;
}

pvm_profile_t pvm_profile = {
  "trace",
  &trace_pvm_init,
  &trace_pvm_finish,
  &trace_pvm_verify
};