src/native/vm/VMThrowable.c

   1 /* nat/VMThrowable.c - java/lang/Throwable
   2
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   4    R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser,
   5    M. Probst, S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck,
   6    P. Tomsich, J. Wenninger
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  23    02111-1307, USA.
  24
  25    Contact: cacao@complang.tuwien.ac.at
  26
  27    Authors: Joseph Wenninger
  28
  29    $Id: VMThrowable.c 1042 2004-04-26 17:12:47Z twisti $
  30
  31 */
  32
  33
  34 #include "global.h"
  35 #include "jni.h"
  36 #include "asmpart.h"
  37 #include "loader.h"
  38 #include "builtin.h"
  39 #include "tables.h"
  40 #include "native.h"
  41 #include "java_lang_Throwable.h"
  42 #include "java_lang_VMThrowable.h"
  43
  44
  45 /*
  46  * Class:     java/lang/VMThrowable
  47  * Method:    fillInStackTrace
  48  * Signature: (Ljava/lang/Throwable;)Ljava/lang/VMThrowable;
  49  */
  50 JNIEXPORT java_lang_VMThrowable* JNICALL Java_java_lang_VMThrowable_fillInStackTrace(JNIEnv *env, jclass clazz, java_lang_Throwable *par1)
  51 {
  52         classinfo *class_java_lang_VMThrowable = NULL;
  53         java_lang_VMThrowable *vmthrow;
  54
  55         if (!class_java_lang_VMThrowable)
  56                 class_java_lang_VMThrowable = class_new(utf_new_char("java/lang/VMThrowable"));
  57
  58         if (class_java_lang_VMThrowable == NULL)
  59                 panic("Needed class java.lang.VMThrowable missing");
  60
  61         vmthrow = (java_lang_VMThrowable *) native_new_and_init(class_java_lang_VMThrowable);
  62
  63         if (vmthrow == NULL)
  64                 panic("Needed instance of class  java.lang.VMThrowable could not be created");
  65
  66 #if defined(__I386__)
  67         (void) asm_get_stackTrace(&(vmthrow->vmData));
  68 #else
  69         vmthrow->vmData=0;
  70 #endif
  71
  72         return vmthrow;
  73 }
  74
  75
  76
  77 java_objectarray* generateStackTraceArray(JNIEnv *env,stacktraceelement *source,long size)
  78 {
  79         long resultPos;
  80         methodinfo *m;
  81         classinfo *c;
  82         java_objectarray *oa;
  83
  84         c = class_new(utf_new_char("java/lang/StackTraceElement"));
  85
  86         if (!c->loaded)
  87                 class_load(c);
  88
  89         if (!c->linked)
  90                 class_link(c);
  91
  92         m = class_findmethod(c,
  93                                                  utf_new_char("<init>"),
  94                                                  utf_new_char("(Ljava/lang/String;ILjava/lang/String;Ljava/lang/String;Z)V"));
  95
  96         if (!m)
  97                 panic("java.lang.StackTraceElement misses needed constructor");
  98
  99         oa = builtin_anewarray(size, c);
 100
 101         if (!oa)
 102                 return 0;
 103
 104 /*      printf("Should return an array with %ld element(s)\n",size);*/
 105         size--;
 106
 107
 108         for(resultPos=0;size>=0;resultPos++,size--) {
 109                 java_objectheader *element=builtin_new(c);
 110                 if (!element) {
 111                         panic("Memory for stack trace element could not be allocated");
 112                 }
 113 #ifdef __GNUC__
 114 #warning call constructor once jni is fixed to allow more than three parameters
 115 #endif
 116 #if 0
 117                 (*env)->CallVoidMethod(env,element,m,
 118                         javastring_new(source[size].method->class->sourcefile),
 119                         source[size].linenumber,
 120                         javastring_new(source[size].method->class->name),
 121                         javastring_new(source[size].method->name),
 122                         source[size].method->flags & ACC_NATIVE);
 123 #else
 124                 if (!(source[size].method->flags & ACC_NATIVE))setfield_critical(c,element,"fileName",
 125                 "Ljava/lang/String;",  jobject,
 126                 (jobject) javastring_new(source[size].method->class->sourcefile));
 127                 setfield_critical(c,element,"className",          "Ljava/lang/String;",  jobject,
 128                 (jobject) javastring_new(source[size].method->class->name));
 129                 setfield_critical(c,element,"methodName",          "Ljava/lang/String;",  jobject,
 130                 (jobject) javastring_new(source[size].method->name));
 131                 setfield_critical(c,element,"lineNumber",          "I",  jint,
 132                 (jint) ((source[size].method->flags & ACC_NATIVE) ? -1:(source[size].linenumber)));
 133                 setfield_critical(c,element,"isNative",          "Z",  jboolean,
 134                 (jboolean) ((source[size].method->flags & ACC_NATIVE) ? 1:0));
 135
 136
 137 #endif
 138
 139                 oa->data[resultPos]=element;
 140         }
 141
 142         return oa;
 143
 144 }
 145
 146
 147 /*
 148  * Class:     java/lang/VMThrowable
 149  * Method:    getStackTrace
 150  * Signature: (Ljava/lang/Throwable;)[Ljava/lang/StackTraceElement;
 151  */
 152 JNIEXPORT java_objectarray* JNICALL Java_java_lang_VMThrowable_getStackTrace(JNIEnv *env, java_lang_VMThrowable *this, java_lang_Throwable *par1)
 153 {
 154         long  pos;
 155         long  maxpos;
 156         utf*  classname=par1->header.vftbl->class->name;
 157         utf*  init=utf_new_char("<init>");
 158         utf*  throwable=utf_new_char("java/lang/Throwable");
 159         stacktraceelement *el=(stacktraceelement*)this->vmData;
 160
 161         /*      log_text("Java_java_lang_VMThrowable_getStackTrace");
 162         utf_display(par1->header.vftbl->class->name);
 163         printf("\n----------------------------------------------\n");*/
 164
 165         if (el == 0) {
 166                 return generateStackTraceArray(env, el, 0);
 167         }
 168
 169         for (pos = 0; el[pos].method != 0; pos++);
 170
 171         if (pos == 0) {
 172                 panic("Stacktrace cannot have zero length");
 173         }
 174
 175         pos--;
 176         pos--;
 177         maxpos = pos;
 178         if (el[pos].method->class->name == throwable && el[pos].method->name == init) {
 179                 for (; pos >= 0 && el[pos].method->name == init && el[pos].method->class->name != classname; pos--);
 180                 pos--;
 181                 if (pos < 0) {
 182                         log_text("Invalid stack trace for Throwable.getStackTrace()");
 183                 }
 184         }
 185
 186         /* build the result array*/
 187         pos++; /*arraysize*/
 188
 189         return generateStackTraceArray(env,el,pos);
 190 }
 191
 192
 193 /*
 194  * These are local overrides for various environment variables in Emacs.
 195  * Please do not remove this and leave it at the end of the file, where
 196  * Emacs will automagically detect them.
 197  * ---------------------------------------------------------------------
 198  * Local variables:
 199  * mode: c
 200  * indent-tabs-mode: t
 201  * c-basic-offset: 4
 202  * tab-width: 4
 203  * End:
 204  */