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 1082 2004-05-26 15:04:54Z jowenn $
  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 pos,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         pos--;
 106
 107
 108         for(resultPos=0;pos>=0;resultPos++,pos--) {
 109
 110                 if (source[pos].method==0) {
 111                         resultPos--;
 112                         continue;
 113                 }
 114
 115                 java_objectheader *element=builtin_new(c);
 116                 if (!element) {
 117                         panic("Memory for stack trace element could not be allocated");
 118                 }
 119 #ifdef __GNUC__
 120 #warning call constructor once jni is fixed to allow more than three parameters
 121 #endif
 122 #if 0
 123                 (*env)->CallVoidMethod(env,element,m,
 124                         javastring_new(source[pos].method->class->sourcefile),
 125                         source[size].linenumber,
 126                         javastring_new(source[pos].method->class->name),
 127                         javastring_new(source[pos].method->name),
 128                         source[pos].method->flags & ACC_NATIVE);
 129 #else
 130                 if (!(source[pos].method->flags & ACC_NATIVE))setfield_critical(c,element,"fileName",
 131                 "Ljava/lang/String;",  jobject,
 132                 (jobject) javastring_new(source[pos].method->class->sourcefile));
 133                 setfield_critical(c,element,"className",          "Ljava/lang/String;",  jobject,
 134                 (jobject) javastring_new(source[pos].method->class->name));
 135                 setfield_critical(c,element,"methodName",          "Ljava/lang/String;",  jobject,
 136                 (jobject) javastring_new(source[pos].method->name));
 137                 setfield_critical(c,element,"lineNumber",          "I",  jint,
 138                 (jint) ((source[pos].method->flags & ACC_NATIVE) ? -1:(source[pos].linenumber)));
 139                 setfield_critical(c,element,"isNative",          "Z",  jboolean,
 140                 (jboolean) ((source[pos].method->flags & ACC_NATIVE) ? 1:0));
 141
 142
 143 #endif
 144
 145                 oa->data[resultPos]=element;
 146         }
 147
 148         return oa;
 149
 150 }
 151
 152
 153 /*
 154  * Class:     java/lang/VMThrowable
 155  * Method:    getStackTrace
 156  * Signature: (Ljava/lang/Throwable;)[Ljava/lang/StackTraceElement;
 157  */
 158 JNIEXPORT java_objectarray* JNICALL Java_java_lang_VMThrowable_getStackTrace(JNIEnv *env, java_lang_VMThrowable *this, java_lang_Throwable *par1)
 159 {
 160         long  pos;
 161         long  maxpos;
 162         long  sizediff;
 163         utf*  classname=par1->header.vftbl->class->name;
 164         utf*  init=utf_new_char("<init>");
 165         utf*  throwable=utf_new_char("java/lang/Throwable");
 166         stacktraceelement *el=(stacktraceelement*)this->vmData;
 167
 168         /*      log_text("Java_java_lang_VMThrowable_getStackTrace");
 169         utf_display(par1->header.vftbl->class->name);
 170         printf("\n----------------------------------------------\n");*/
 171
 172         sizediff=0;
 173         if (el == 0) {
 174                 return generateStackTraceArray(env, el, 0,0);
 175         }
 176
 177         for (pos = 0; !((el[pos].method == 0) && (el[pos].linenumber ==-1)); pos++) {
 178                 if (el[pos].method==0) sizediff++;
 179         }
 180
 181         if (pos == 0) {
 182                 panic("Stacktrace cannot have zero length");
 183         }
 184
 185         pos--;
 186         pos--;
 187         maxpos = pos;
 188         if (el[pos].method->class->name == throwable && el[pos].method->name == init) {
 189                 for (; pos >= 0 && el[pos].method->name == init && el[pos].method->class->name != classname; pos--);
 190                 pos--;
 191                 if (pos < 0) {
 192                         log_text("Invalid stack trace for Throwable.getStackTrace()");
 193                 }
 194         }
 195
 196         /* build the result array*/
 197         pos++; /*arraysize*/
 198
 199         return generateStackTraceArray(env,el,pos,pos-sizediff);
 200 }
 201
 202
 203 /*
 204  * These are local overrides for various environment variables in Emacs.
 205  * Please do not remove this and leave it at the end of the file, where
 206  * Emacs will automagically detect them.
 207  * ---------------------------------------------------------------------
 208  * Local variables:
 209  * mode: c
 210  * indent-tabs-mode: t
 211  * c-basic-offset: 4
 212  * tab-width: 4
 213  * End:
 214  */