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 1574 2004-11-23 16:07:11Z 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 "nat/java_lang_Class.h"
  42 #include "nat/java_lang_Throwable.h"
  43 #include "nat/java_lang_VMClass.h"
  44 #include "nat/java_lang_VMThrowable.h"
  45
  46
  47 /*
  48  * Class:     java/lang/VMThrowable
  49  * Method:    fillInStackTrace
  50  * Signature: (Ljava/lang/Throwable;)Ljava/lang/VMThrowable;
  51  */
  52 JNIEXPORT java_lang_VMThrowable* JNICALL Java_java_lang_VMThrowable_fillInStackTrace(JNIEnv *env, jclass clazz, java_lang_Throwable *par1)
  53 {
  54         classinfo *class_java_lang_VMThrowable = NULL;
  55         java_lang_VMThrowable *vmthrow;
  56
  57         if (!class_java_lang_VMThrowable)
  58                 class_java_lang_VMThrowable = class_new(utf_new_char("java/lang/VMThrowable"));
  59
  60         if (class_java_lang_VMThrowable == NULL)
  61                 panic("Needed class java.lang.VMThrowable missing");
  62
  63         vmthrow = (java_lang_VMThrowable *) native_new_and_init(class_java_lang_VMThrowable);
  64
  65         if (vmthrow == NULL)
  66                 panic("Needed instance of class  java.lang.VMThrowable could not be created");
  67
  68 #if defined(__I386__)
  69         (void) asm_get_stackTrace(&(vmthrow->vmData));
  70 #else
  71         vmthrow->vmData=0;
  72 #endif
  73
  74         return vmthrow;
  75 }
  76
  77
  78
  79 java_objectarray* generateStackTraceArray(JNIEnv *env,stacktraceelement *source,long pos,long size)
  80 {
  81         long resultPos;
  82         methodinfo *m;
  83         classinfo *c;
  84         java_objectarray *oa;
  85
  86         c = class_new(utf_new_char("java/lang/StackTraceElement"));
  87
  88         if (!c->loaded)
  89                 class_load(c);
  90
  91         if (!c->linked)
  92                 class_link(c);
  93
  94         m = class_findmethod(c,
  95                                                  utf_new_char("<init>"),
  96                                                  utf_new_char("(Ljava/lang/String;ILjava/lang/String;Ljava/lang/String;Z)V"));
  97
  98         if (!m)
  99                 panic("java.lang.StackTraceElement misses needed constructor");
 100
 101         oa = builtin_anewarray(size, c);
 102
 103         if (!oa)
 104                 return 0;
 105
 106 /*      printf("Should return an array with %ld element(s)\n",size);*/
 107         pos--;
 108
 109
 110         for(resultPos=0;pos>=0;resultPos++,pos--) {
 111                 java_objectheader *element;
 112
 113                 if (source[pos].method==0) {
 114                         resultPos--;
 115                         continue;
 116                 }
 117
 118                 element=builtin_new(c);
 119                 if (!element) {
 120                         panic("Memory for stack trace element could not be allocated");
 121                 }
 122 #ifdef __GNUC__
 123 #warning call constructor once jni is fixed to allow more than three parameters
 124 #endif
 125 #if 0
 126                 (*env)->CallVoidMethod(env,element,m,
 127                         javastring_new(source[pos].method->class->sourcefile),
 128                         source[size].linenumber,
 129                         javastring_new(source[pos].method->class->name),
 130                         javastring_new(source[pos].method->name),
 131                         source[pos].method->flags & ACC_NATIVE);
 132 #else
 133                 if (!(source[pos].method->flags & ACC_NATIVE))setfield_critical(c,element,"fileName",
 134                 "Ljava/lang/String;",  jobject,
 135                 (jobject) javastring_new(source[pos].method->class->sourcefile));
 136 /*              setfield_critical(c,element,"className",          "Ljava/lang/String;",  jobject,  */
 137 /*              (jobject) javastring_new(source[pos].method->class->name)); */
 138                 setfield_critical(c,element,"declaringClass",      "Ljava/lang/String;",  jobject,
 139                 (jobject) Java_java_lang_VMClass_getName(env, NULL, (java_lang_Class *) source[pos].method->class));
 140                 setfield_critical(c,element,"methodName",          "Ljava/lang/String;",  jobject,
 141                 (jobject) javastring_new(source[pos].method->name));
 142                 setfield_critical(c,element,"lineNumber",          "I",  jint,
 143                 (jint) ((source[pos].method->flags & ACC_NATIVE) ? -1:(source[pos].linenumber)));
 144                 setfield_critical(c,element,"isNative",          "Z",  jboolean,
 145                 (jboolean) ((source[pos].method->flags & ACC_NATIVE) ? 1:0));
 146
 147
 148 #endif
 149
 150                 oa->data[resultPos]=element;
 151         }
 152
 153         return oa;
 154
 155 }
 156
 157
 158 /*
 159  * Class:     java/lang/VMThrowable
 160  * Method:    getStackTrace
 161  * Signature: (Ljava/lang/Throwable;)[Ljava/lang/StackTraceElement;
 162  */
 163 JNIEXPORT java_objectarray* JNICALL Java_java_lang_VMThrowable_getStackTrace(JNIEnv *env, java_lang_VMThrowable *this, java_lang_Throwable *par1)
 164 {
 165         long  pos;
 166         long  maxpos;
 167         long  sizediff;
 168         utf*  classname=par1->header.vftbl->class->name;
 169         utf*  init=utf_new_char("<init>");
 170         utf*  throwable=utf_new_char("java/lang/Throwable");
 171         stacktraceelement *el=(stacktraceelement*)this->vmData;
 172
 173         /*      log_text("Java_java_lang_VMThrowable_getStackTrace");
 174         utf_display(par1->header.vftbl->class->name);
 175         printf("\n----------------------------------------------\n");*/
 176
 177         sizediff=0;
 178         if (el == 0) {
 179                 return generateStackTraceArray(env, el, 0,0);
 180         }
 181
 182         for (pos = 0; !((el[pos].method == 0) && (el[pos].linenumber ==-1)); pos++) {
 183                 if (el[pos].method==0) sizediff++;
 184         }
 185
 186         if (pos == 0) {
 187                 panic("Stacktrace cannot have zero length");
 188         }
 189
 190         pos--;
 191         pos--;
 192         maxpos = pos;
 193         if (el[pos].method!=0) { /* if == 0 -> some builtin native */
 194                 if (el[pos].method->class->name == throwable && el[pos].method->name == init) {
 195                         for (; pos >= 0 && el[pos].method->name == init && el[pos].method->class->name != classname; pos--) {
 196 /*                              log_text("ignoring:");
 197                                 utf_display(el[pos].method->name);
 198                                 log_text("");
 199                                 utf_display(el[pos].method->class->name);
 200                                 log_text("");*/
 201
 202                         };
 203                         pos--;
 204                         if (pos < 0) {
 205                                 log_text("Invalid stack trace for Throwable.getStackTrace()");
 206
 207                         }
 208                 }
 209         }
 210
 211         /* build the result array*/
 212         pos++; /*arraysize*/
 213
 214         return generateStackTraceArray(env,el,pos,pos-sizediff);
 215 }
 216
 217
 218 /*
 219  * These are local overrides for various environment variables in Emacs.
 220  * Please do not remove this and leave it at the end of the file, where
 221  * Emacs will automagically detect them.
 222  * ---------------------------------------------------------------------
 223  * Local variables:
 224  * mode: c
 225  * indent-tabs-mode: t
 226  * c-basic-offset: 4
 227  * tab-width: 4
 228  * End:
 229  */