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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [include/] [jvm.h] - Blame information for rev 757

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1 757 jeremybenn
// jvm.h - Header file for private implementation information. -*- c++ -*-
2
 
3
/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008  Free Software Foundation
4
 
5
   This file is part of libgcj.
6
 
7
This software is copyrighted work licensed under the terms of the
8
Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
9
details.  */
10
 
11
#ifndef __JAVA_JVM_H__
12
#define __JAVA_JVM_H__
13
 
14
// Define this before including jni.h.
15
// jni.h is included by jvmpi.h, which might be included.  We define
16
// this unconditionally because it is convenient and it lets other
17
// files include jni.h without difficulty.
18
#define __GCJ_JNI_IMPL__
19
 
20
#include <gcj/javaprims.h>
21
 
22
#include <java-assert.h>
23
#include <java-threads.h>
24
// Must include java-gc.h before Object.h for the implementation.
25
#include <java-gc.h>
26
 
27
#include <java/lang/Object.h>
28
 
29
// Include cni.h before field.h to enable all definitions.  FIXME.
30
#include <gcj/cni.h>
31
#include <gcj/field.h>
32
 
33
#include <java/lang/Thread.h>
34
 
35
#include <sysdep/locks.h>
36
 
37
/* Macro for possible unused arguments.  */
38
#define MAYBE_UNUSED __attribute__((__unused__))
39
 
40
/* Structure of the virtual table.  */
41
struct _Jv_VTable
42
{
43
#ifdef __ia64__
44
  typedef struct { void *pc, *gp; } vtable_elt;
45
#else
46
  typedef void *vtable_elt;
47
#endif
48
  jclass clas;
49
  void *gc_descr;
50
 
51
  // This must be last, as derived classes "extend" this by
52
  // adding new data members.
53
  vtable_elt method[1];
54
 
55
#ifdef __ia64__
56
  void *get_method(int i) { return &method[i]; }
57
  void set_method(int i, void *fptr) { method[i] = *(vtable_elt *)fptr; }
58
  void *get_finalizer()
59
  {
60
    // We know that get_finalizer is only used for checking whether
61
    // this object needs to have a finalizer registered.  So it is
62
    // safe to simply return just the PC component of the vtable
63
    // slot.
64
    return ((vtable_elt *)(get_method(0)))->pc;
65
  }
66
#else
67
  void *get_method(int i) { return method[i]; }
68
  void set_method(int i, void *fptr) { method[i] = fptr; }
69
  void *get_finalizer() { return get_method(0); }
70
#endif
71
 
72
  static size_t vtable_elt_size() { return sizeof(vtable_elt); }
73
 
74
  // Given a method index, return byte offset from the vtable pointer.
75
  static jint idx_to_offset (int index)
76
  {
77
    return (2 * sizeof (void *)) + (index * vtable_elt_size ());
78
  }
79
 
80
  static _Jv_VTable *new_vtable (int count);
81
};
82
 
83
union _Jv_word
84
{
85
  jobject o;
86
  jint i;                       // Also stores smaller integral types.
87
  jfloat f;
88
  jint ia[1];                   // Half of _Jv_word2.
89
  void* p;
90
 
91
#if SIZEOF_VOID_P == 8
92
  // We can safely put a long or a double in here without increasing
93
  // the size of _Jv_Word; we take advantage of this in the interpreter.
94
  jlong l;
95
  jdouble d;
96
#endif
97
 
98
  jclass                     clazz;
99
  jstring                    string;
100
  struct _Jv_Field          *field;
101
  struct _Jv_Utf8Const      *utf8;
102
  struct _Jv_ResolvedMethod *rmethod;
103
};
104
 
105
union _Jv_word2
106
{
107
  jint ia[2];
108
  jlong l;
109
  jdouble d;
110
};
111
 
112
union _Jv_value
113
{
114
  jbyte byte_value;
115
  jshort short_value;
116
  jchar char_value;
117
  jint int_value;
118
  jlong long_value;
119
  jfloat float_value;
120
  jdouble double_value;
121
  jobject object_value;
122
};
123
 
124
/* Extract a character from a Java-style Utf8 string.
125
 * PTR points to the current character.
126
 * LIMIT points to the end of the Utf8 string.
127
 * PTR is incremented to point after the character thta gets returns.
128
 * On an error, -1 is returned. */
129
#define UTF8_GET(PTR, LIMIT) \
130
  ((PTR) >= (LIMIT) ? -1 \
131
   : *(PTR) < 128 ? *(PTR)++ \
132
   : (*(PTR)&0xE0) == 0xC0 && ((PTR)+=2)<=(LIMIT) && ((PTR)[-1]&0xC0) == 0x80 \
133
   ? (((PTR)[-2] & 0x1F) << 6) + ((PTR)[-1] & 0x3F) \
134
   : (*(PTR) & 0xF0) == 0xE0 && ((PTR) += 3) <= (LIMIT) \
135
   && ((PTR)[-2] & 0xC0) == 0x80 && ((PTR)[-1] & 0xC0) == 0x80 \
136
   ? (((PTR)[-3]&0x0F) << 12) + (((PTR)[-2]&0x3F) << 6) + ((PTR)[-1]&0x3F) \
137
   : ((PTR)++, -1))
138
 
139
extern int _Jv_strLengthUtf8(const char* str, int len);
140
 
141
typedef struct _Jv_Utf8Const Utf8Const;
142
_Jv_Utf8Const *_Jv_makeUtf8Const (const char *s, int len);
143
_Jv_Utf8Const *_Jv_makeUtf8Const (jstring string);
144
static inline _Jv_Utf8Const *_Jv_makeUtf8Const (const char *s)
145
{
146
  return _Jv_makeUtf8Const (s, strlen (s));
147
}
148
extern jboolean _Jv_equalUtf8Consts (const _Jv_Utf8Const *, const _Jv_Utf8Const *);
149
extern jboolean _Jv_equal (_Jv_Utf8Const *, jstring, jint);
150
extern jboolean _Jv_equaln (_Jv_Utf8Const *, jstring, jint);
151
 
152
/* Helper class which converts a jstring to a temporary char*.
153
   Uses the supplied buffer, if non-null. Otherwise, allocates
154
   the buffer on the heap. Use the JV_TEMP_UTF_STRING macro,
155
   which follows, to automatically allocate a stack buffer if
156
   the string is small enough. */
157
class _Jv_TempUTFString
158
{
159
public:
160
  _Jv_TempUTFString(jstring jstr, char* buf=0);
161
  ~_Jv_TempUTFString();
162
 
163
// Accessors
164
  operator const char*() const
165
  {
166
    return buf_;
167
  }
168
  const char* buf() const
169
  {
170
    return buf_;
171
  }
172
  char* buf()
173
  {
174
    return buf_;
175
  }
176
 
177
private:
178
  char* buf_;
179
  bool heapAllocated_;
180
};
181
 
182
inline _Jv_TempUTFString::_Jv_TempUTFString (jstring jstr, char* buf)
183
  : buf_(0), heapAllocated_(false)
184
{
185
  if (!jstr) return;
186
  jsize len = JvGetStringUTFLength (jstr);
187
  if (buf)
188
    buf_ = buf;
189
  else
190
    {
191
      buf_ = (char*) _Jv_Malloc (len+1);
192
      heapAllocated_ = true;
193
    }
194
 
195
  JvGetStringUTFRegion (jstr, 0, jstr->length(), buf_);
196
  buf_[len] = '\0';
197
}
198
 
199
inline _Jv_TempUTFString::~_Jv_TempUTFString ()
200
{
201
  if (heapAllocated_)
202
    _Jv_Free (buf_);
203
}
204
 
205
/* Macro which uses _Jv_TempUTFString. Allocates a stack-based
206
   buffer if the string and its null terminator are <= 256
207
   characters in length. Otherwise, a heap-based buffer is
208
   used. The parameters to this macro are the variable name
209
   which is an instance of _Jv_TempUTFString (above) and a
210
   jstring.
211
 
212
   Sample Usage:
213
 
214
   jstring jstr = getAJString();
215
   JV_TEMP_UTF_STRING(utfstr, jstr);
216
   printf("The string is: %s\n", utfstr.buf());
217
 
218
 */
219
#define JV_TEMP_UTF_STRING(utfstr, jstr) \
220
  jstring utfstr##thejstr = (jstr); \
221
  jsize utfstr##_len = utfstr##thejstr ? JvGetStringUTFLength (utfstr##thejstr) + 1 : 0; \
222
  char utfstr##_buf[utfstr##_len <= 256 ? utfstr##_len : 0]; \
223
  _Jv_TempUTFString utfstr(utfstr##thejstr, sizeof(utfstr##_buf)==0 ? 0 : utfstr##_buf)
224
 
225
namespace gcj
226
{
227
  /* Some constants used during lookup of special class methods.  */
228
  extern _Jv_Utf8Const *void_signature; /* "()V" */
229
  extern _Jv_Utf8Const *clinit_name;    /* "<clinit>" */
230
  extern _Jv_Utf8Const *init_name;      /* "<init>" */
231
  extern _Jv_Utf8Const *finit_name;     /* "finit$", */
232
 
233
  /* Set to true by _Jv_CreateJavaVM. */
234
  extern bool runtimeInitialized;
235
 
236
  /* Print out class names as they are initialized. */
237
  extern bool verbose_class_flag;
238
 
239
  /* When true, enable the bytecode verifier and BC-ABI verification. */
240
  extern bool verifyClasses;
241
 
242
  /* Thread stack size specified by the -Xss runtime argument. */
243
  extern size_t stack_size;
244
 
245
  /* The start time */
246
  extern jlong startTime;
247
 
248
  /* The VM arguments */
249
  extern JArray<jstring>* vmArgs;
250
 
251
  // Currently loaded classes
252
  extern jint loadedClasses;
253
 
254
  // Unloaded classes
255
  extern jlong unloadedClasses;
256
}
257
 
258
// This class handles all aspects of class preparation and linking.
259
class _Jv_Linker
260
{
261
private:
262
  typedef unsigned int uaddr __attribute__ ((mode (pointer)));
263
 
264
  static _Jv_Field *find_field_helper(jclass, _Jv_Utf8Const *, _Jv_Utf8Const *,
265
                                      jclass, jclass *);
266
  static _Jv_Field *find_field(jclass, jclass, jclass *, _Jv_Utf8Const *,
267
                               _Jv_Utf8Const *);
268
  static void check_loading_constraints (_Jv_Method *, jclass, jclass);
269
  static void prepare_constant_time_tables(jclass);
270
  static jshort get_interfaces(jclass, _Jv_ifaces *);
271
  static void link_symbol_table(jclass);
272
  static void link_exception_table(jclass);
273
  static void layout_interface_methods(jclass);
274
  static void set_vtable_entries(jclass, _Jv_VTable *);
275
  static void make_vtable(jclass);
276
  static void ensure_fields_laid_out(jclass);
277
  static void ensure_class_linked(jclass);
278
  static void ensure_supers_installed(jclass);
279
  static void add_miranda_methods(jclass, jclass);
280
  static void ensure_method_table_complete(jclass);
281
  static void verify_class(jclass);
282
  static jshort find_iindex(jclass *, jshort *, jshort);
283
  static jshort indexof(void *, void **, jshort);
284
  static int get_alignment_from_class(jclass);
285
  static void generate_itable(jclass, _Jv_ifaces *, jshort *);
286
  static jshort append_partial_itable(jclass, jclass, void **, jshort);
287
  static _Jv_Method *search_method_in_superclasses (jclass cls, jclass klass,
288
                                                    _Jv_Utf8Const *method_name,
289
                                                    _Jv_Utf8Const *method_signature,
290
                                                    jclass *found_class,
291
                                                    bool check_perms = true);
292
  static void *create_error_method(_Jv_Utf8Const *, jclass);
293
 
294
  /* The least significant bit of the signature pointer in a symbol
295
     table is set to 1 by the compiler if the reference is "special",
296
     i.e. if it is an access to a private field or method.  Extract
297
     that bit, clearing it in the address and setting the LSB of
298
     SPECIAL accordingly.  */
299
  static void maybe_adjust_signature (_Jv_Utf8Const *&s, uaddr &special)
300
  {
301
    union {
302
      _Jv_Utf8Const *signature;
303
      uaddr signature_bits;
304
    };
305
    signature = s;
306
    special = signature_bits & 1;
307
    signature_bits -= special;
308
    s = signature;
309
  }
310
 
311
  static _Jv_Mutex_t resolve_mutex;
312
  static void init (void) __attribute__((constructor));
313
 
314
public:
315
 
316
  static bool has_field_p (jclass, _Jv_Utf8Const *);
317
  static void print_class_loaded (jclass);
318
  static void resolve_class_ref (jclass, jclass *);
319
  static void wait_for_state(jclass, int);
320
  static _Jv_Method *resolve_method_entry (jclass, jclass &,
321
                                           int, int,
322
                                           bool, bool);
323
  static _Jv_word resolve_pool_entry (jclass, int, bool =false);
324
  static void resolve_field (_Jv_Field *, java::lang::ClassLoader *);
325
  static void verify_type_assertions (jclass);
326
  static _Jv_Method *search_method_in_class (jclass, jclass,
327
                                             _Jv_Utf8Const *,
328
                                             _Jv_Utf8Const *,
329
                                             bool check_perms = true);
330
  static void layout_vtable_methods(jclass);
331
 
332
  static jbyte read_cpool_entry (_Jv_word *data,
333
                                 const _Jv_Constants *const pool,
334
                                 int index)
335
  {
336
    _Jv_MutexLock (&resolve_mutex);
337
    jbyte tags = pool->tags[index];
338
    *data = pool->data[index];
339
    _Jv_MutexUnlock (&resolve_mutex);
340
    return tags;
341
  }
342
 
343
  static void write_cpool_entry (_Jv_word data, jbyte tags,
344
                                 _Jv_Constants *pool,
345
                                 int index)
346
  {
347
    _Jv_MutexLock (&resolve_mutex);
348
    pool->data[index] = data;
349
    pool->tags[index] = tags;
350
    _Jv_MutexUnlock (&resolve_mutex);
351
  }
352
};
353
 
354
/* Type of pointer used as finalizer.  */
355
typedef void _Jv_FinalizerFunc (jobject);
356
 
357
/* Allocate space for a new Java object.  */
358
void *_Jv_AllocObj (jsize size, jclass cl) __attribute__((__malloc__));
359
/* Allocate space for a potentially uninitialized pointer-free object.
360
   Interesting only with JV_HASH_SYNCHRONIZATION.  */
361
void *_Jv_AllocPtrFreeObj (jsize size, jclass cl) __attribute__((__malloc__));
362
/* Allocate space for an array of Java objects.  */
363
void *_Jv_AllocArray (jsize size, jclass cl) __attribute__((__malloc__));
364
/* Allocate space that is known to be pointer-free.  */
365
void *_Jv_AllocBytes (jsize size) __attribute__((__malloc__));
366
/* Allocate space for a new non-Java object, which does not have the usual
367
   Java object header but may contain pointers to other GC'ed objects.  */
368
void *_Jv_AllocRawObj (jsize size) __attribute__((__malloc__));
369
/* Allocate a double-indirect pointer to a _Jv_ClosureList such that
370
   the _Jv_ClosureList gets automatically finalized when it is no
371
   longer reachable, not even by other finalizable objects.  */
372
_Jv_ClosureList **_Jv_ClosureListFinalizer (void) __attribute__((__malloc__));
373
/* Explicitly throw an out-of-memory exception. */
374
void _Jv_ThrowNoMemory() __attribute__((__noreturn__));
375
/* Allocate an object with a single pointer.  The first word is reserved
376
   for the GC, and the second word is the traced pointer.  */
377
void *_Jv_AllocTraceOne (jsize size /* incl. reserved slot */);
378
/* Ditto, but for two traced pointers.                     */
379
void *_Jv_AllocTraceTwo (jsize size /* incl. reserved slot */);
380
/* Initialize the GC.  */
381
void _Jv_InitGC (void);
382
/* Register a finalizer.  */
383
void _Jv_RegisterFinalizer (void *object, _Jv_FinalizerFunc *method);
384
/* Compute the GC descriptor for a class */
385
void * _Jv_BuildGCDescr(jclass);
386
 
387
/* Allocate some unscanned, unmoveable memory.  Return NULL if out of
388
   memory.  */
389
void *_Jv_MallocUnchecked (jsize size) __attribute__((__malloc__));
390
 
391
/* Initialize finalizers.  The argument is a function to be called
392
   when a finalizer is ready to be run.  */
393
void _Jv_GCInitializeFinalizers (void (*notifier) (void));
394
/* Run finalizers for objects ready to be finalized..  */
395
void _Jv_RunFinalizers (void);
396
/* Run all finalizers.  Should be called only before exit.  */
397
void _Jv_RunAllFinalizers (void);
398
/* Perform a GC.  */
399
void _Jv_RunGC (void);
400
/* Disable and enable GC.  */
401
void _Jv_DisableGC (void);
402
void _Jv_EnableGC (void);
403
/* Register a disappearing link.  This is a field F which should be
404
   cleared when *F is found to be inaccessible.  This is used in the
405
   implementation of java.lang.ref.Reference.  */
406
void _Jv_GCRegisterDisappearingLink (jobject *objp);
407
/* Return true if OBJECT should be reclaimed.  This is used to
408
   implement soft references.  */
409
jboolean _Jv_GCCanReclaimSoftReference (jobject obj);
410
 
411
/* Register a finalizer for a String object.  This is only used by
412
   the intern() implementation.  */
413
void _Jv_RegisterStringFinalizer (jobject str);
414
/* This is called to actually finalize a possibly-intern()d String.  */
415
void _Jv_FinalizeString (jobject str);
416
 
417
/* Return approximation of total size of heap.  */
418
long _Jv_GCTotalMemory (void);
419
/* Return approximation of total free memory.  */
420
long _Jv_GCFreeMemory (void);
421
 
422
/* Set initial heap size.  If SIZE==0, ignore.  Should be run before
423
   _Jv_InitGC.  Not required to have any actual effect.  */
424
void _Jv_GCSetInitialHeapSize (size_t size);
425
 
426
/* Set maximum heap size.  If SIZE==0, unbounded.  Should be run
427
   before _Jv_InitGC.  Not required to have any actual effect.  */
428
void _Jv_GCSetMaximumHeapSize (size_t size);
429
 
430
/* External interface to setting the heap size.  Parses ARG (a number
431
   which can optionally have "k" or "m" appended and calls
432
   _Jv_GCSetInitialHeapSize.  */
433
void _Jv_SetInitialHeapSize (const char *arg);
434
 
435
/* External interface to setting the maximum heap size.  Parses ARG (a
436
   number which can optionally have "k" or "m" appended and calls
437
   _Jv_GCSetMaximumHeapSize.  */
438
void _Jv_SetMaximumHeapSize (const char *arg);
439
 
440
/* External interface for setting the GC_free_space_divisor.  Calls
441
   GC_set_free_space_divisor and returns the old value.  */
442
int _Jv_SetGCFreeSpaceDivisor (int div);
443
 
444
/* Free the method cache, if one was allocated.  This is only called
445
   during thread deregistration.  */
446
void _Jv_FreeMethodCache ();
447
 
448
/* Set the stack size for threads.  Parses ARG, a number which can
449
   optionally have "k" or "m" appended.  */
450
void _Jv_SetStackSize (const char *arg);
451
 
452
extern "C" void JvRunMain (jclass klass, int argc, const char **argv);
453
extern "C" void JvRunMainName (const char *name, int argc, const char **argv);
454
 
455
void _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
456
                  bool is_jar);
457
 
458
void _Jv_RunMain (struct _Jv_VMInitArgs *vm_args, jclass klass,
459
                  const char *name, int argc, const char **argv, bool is_jar);
460
 
461
// Delayed until after _Jv_AllocRawObj is declared.
462
inline _Jv_VTable *
463
_Jv_VTable::new_vtable (int count)
464
{
465
  size_t size = sizeof(_Jv_VTable) + (count - 1) * vtable_elt_size ();
466
  return (_Jv_VTable *) _Jv_AllocRawObj (size);
467
}
468
 
469
// Determine if METH gets an entry in a VTable.
470
static inline jboolean _Jv_isVirtualMethod (_Jv_Method *meth)
471
{
472
  using namespace java::lang::reflect;
473
  return (((meth->accflags & (Modifier::STATIC | Modifier::PRIVATE)) == 0)
474
          && meth->name->first() != '<');
475
}
476
 
477
// This function is used to determine the hash code of an object.
478
inline jint
479
_Jv_HashCode (jobject obj)
480
{
481
  // This was chosen to yield relatively well distributed results on
482
  // both 32- and 64-bit architectures.  Note 0x7fffffff is prime.
483
  // FIXME: we assume sizeof(long) == sizeof(void *).
484
  return (jint) ((unsigned long) obj % 0x7fffffff);
485
}
486
 
487
// Return a raw pointer to the elements of an array given the array
488
// and its element type.  You might think we could just pick a single
489
// array type and use elements() on it, but we can't because we must
490
// account for alignment of the element type.  When ARRAY is null, we
491
// obtain the number of bytes taken by the base part of the array.
492
inline char *
493
_Jv_GetArrayElementFromElementType (jobject array,
494
                                    jclass element_type)
495
{
496
  char *elts;
497
  if (element_type == JvPrimClass (byte))
498
    elts = (char *) elements ((jbyteArray) array);
499
  else if (element_type == JvPrimClass (short))
500
    elts = (char *) elements ((jshortArray) array);
501
  else if (element_type == JvPrimClass (int))
502
    elts = (char *) elements ((jintArray) array);
503
  else if (element_type == JvPrimClass (long))
504
    elts = (char *) elements ((jlongArray) array);
505
  else if (element_type == JvPrimClass (boolean))
506
    elts = (char *) elements ((jbooleanArray) array);
507
  else if (element_type == JvPrimClass (char))
508
    elts = (char *) elements ((jcharArray) array);
509
  else if (element_type == JvPrimClass (float))
510
    elts = (char *) elements ((jfloatArray) array);
511
  else if (element_type == JvPrimClass (double))
512
    elts = (char *) elements ((jdoubleArray) array);
513
  else
514
    elts = (char *) elements ((jobjectArray) array);
515
  return elts;
516
}
517
 
518
extern "C" void _Jv_ThrowBadArrayIndex (jint bad_index)
519
  __attribute__((noreturn));
520
extern "C" void _Jv_ThrowNullPointerException (void)
521
  __attribute__((noreturn));
522
extern "C" void _Jv_ThrowNoSuchMethodError (void)
523
  __attribute__((noreturn));
524
extern "C" void _Jv_ThrowNoSuchFieldError (int)
525
  __attribute__((noreturn));
526
extern "C" jobject _Jv_NewArray (jint type, jint size)
527
  __attribute__((__malloc__));
528
extern "C" jobject _Jv_NewMultiArray (jclass klass, jint dims, ...)
529
  __attribute__((__malloc__));
530
extern "C" void *_Jv_CheckCast (jclass klass, jobject obj);
531
extern "C" void *_Jv_LookupInterfaceMethod (jclass klass, Utf8Const *name,
532
                                           Utf8Const *signature);
533
extern "C" void *_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface,
534
                                               int meth_idx);
535
extern "C" void _Jv_CheckArrayStore (jobject array, jobject obj);
536
extern "C" void _Jv_RegisterClass (jclass klass);
537
extern "C" void _Jv_RegisterClasses (const jclass *classes);
538
extern "C" void _Jv_RegisterClasses_Counted (const jclass *classes,
539
                                             size_t count);
540
extern "C" void _Jv_RegisterResource (void *vptr);
541
extern void _Jv_UnregisterClass (_Jv_Utf8Const*, java::lang::ClassLoader*);
542
 
543
extern "C" jobject _Jv_UnwrapJNIweakReference (jobject);
544
 
545
extern jclass _Jv_FindClass (_Jv_Utf8Const *name,
546
                             java::lang::ClassLoader *loader);
547
 
548
extern jclass _Jv_FindClassNoException (_Jv_Utf8Const *name,
549
                             java::lang::ClassLoader *loader);
550
 
551
extern jclass _Jv_FindClassFromSignature (char *,
552
                                          java::lang::ClassLoader *loader,
553
                                          char ** = NULL);
554
 
555
extern jclass _Jv_FindClassFromSignatureNoException (char *,
556
                                          java::lang::ClassLoader *loader,
557
                                          char ** = NULL);
558
 
559
extern void _Jv_GetTypesFromSignature (jmethodID method,
560
                                       jclass declaringClass,
561
                                       JArray<jclass> **arg_types_out,
562
                                       jclass *return_type_out);
563
 
564
extern jboolean _Jv_CheckAccess (jclass self_klass, jclass other_klass,
565
                                 jint flags);
566
 
567
extern jobject _Jv_CallAnyMethodA (jobject obj, jclass return_type,
568
                                   jmethodID meth, jboolean is_constructor,
569
                                   JArray<jclass> *parameter_types,
570
                                   jobjectArray args,
571
                                   jclass iface = NULL);
572
 
573
union jvalue;
574
extern void _Jv_CallAnyMethodA (jobject obj,
575
                                jclass return_type,
576
                                jmethodID meth,
577
                                jboolean is_constructor,
578
                                jboolean is_virtual_call,
579
                                JArray<jclass> *parameter_types,
580
                                const jvalue *args,
581
                                jvalue *result,
582
                                jboolean is_jni_call = true,
583
                                jclass iface = NULL);
584
 
585
extern void _Jv_CheckOrCreateLoadingConstraint (jclass,
586
                                                java::lang::ClassLoader *);
587
 
588
extern jobject _Jv_NewMultiArray (jclass, jint ndims, jint* dims)
589
  __attribute__((__malloc__));
590
 
591
extern "C" void _Jv_ThrowAbstractMethodError () __attribute__((__noreturn__));
592
 
593
/* Checked divide subroutines. */
594
extern "C"
595
{
596
  jint _Jv_divI (jint, jint);
597
  jint _Jv_remI (jint, jint);
598
  jlong _Jv_divJ (jlong, jlong);
599
  jlong _Jv_remJ (jlong, jlong);
600
}
601
 
602
/* Get the number of arguments (cf. argc) or 0 if our argument
603
   list was never initialized.  */
604
extern int _Jv_GetNbArgs (void);
605
 
606
/* Get the specified argument (cf. argv[index]) or "" if either
607
   our argument list was never initialized or the specified index
608
   is out of bounds.  */
609
extern const char * _Jv_GetSafeArg (int index);
610
 
611
/* Sets our argument list. Can be used by programs with non-standard
612
   entry points.  */
613
extern void _Jv_SetArgs (int argc, const char **argv);
614
 
615
/* Get the name of the running executable.  */
616
extern const char *_Jv_ThisExecutable (void);
617
 
618
/* Return a pointer to a symbol in executable or loaded library.  */
619
void *_Jv_FindSymbolInExecutable (const char *);
620
 
621
/* Initialize JNI.  */
622
extern void _Jv_JNI_Init (void);
623
 
624
/* Get or set the per-thread JNIEnv used by the invocation API.  */
625
_Jv_JNIEnv *_Jv_GetCurrentJNIEnv ();
626
void _Jv_SetCurrentJNIEnv (_Jv_JNIEnv *);
627
 
628
/* Free a JNIEnv. */
629
void _Jv_FreeJNIEnv (_Jv_JNIEnv *);
630
 
631
extern "C" void _Jv_JNI_PopSystemFrame (_Jv_JNIEnv *);
632
_Jv_JNIEnv *_Jv_GetJNIEnvNewFrameWithLoader (::java::lang::ClassLoader *);
633
 
634
struct _Jv_JavaVM;
635
_Jv_JavaVM *_Jv_GetJavaVM ();
636
 
637
/* Get a JVMTI environment */
638
struct _Jv_JVMTIEnv;
639
_Jv_JVMTIEnv *_Jv_GetJVMTIEnv (void);
640
 
641
/* Initialize JVMTI */
642
extern void _Jv_JVMTI_Init (void);
643
 
644
// Some verification functions from defineclass.cc.
645
bool _Jv_VerifyFieldSignature (_Jv_Utf8Const*sig);
646
bool _Jv_VerifyMethodSignature (_Jv_Utf8Const*sig);
647
bool _Jv_VerifyClassName (unsigned char* ptr, _Jv_ushort length);
648
bool _Jv_VerifyClassName (_Jv_Utf8Const *name);
649
bool _Jv_VerifyIdentifier (_Jv_Utf8Const *);
650
bool _Jv_ClassNameSamePackage (_Jv_Utf8Const *name1, _Jv_Utf8Const *name2);
651
 
652
struct _Jv_core_chain
653
{
654
  int name_length;
655
  const char *name;
656
  int data_length;
657
  const void *data;
658
 
659
  struct _Jv_core_chain *next;
660
};
661
 
662
// This is called when new core data is loaded.
663
extern void (*_Jv_RegisterCoreHook) (_Jv_core_chain *);
664
 
665
_Jv_core_chain *_Jv_FindCore (_Jv_core_chain *node, jstring name);
666
void _Jv_FreeCoreChain (_Jv_core_chain *chain);
667
 
668
#ifdef ENABLE_JVMPI
669
 
670
#include "jvmpi.h"
671
 
672
extern void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
673
extern void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
674
extern void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
675
#endif
676
 
677
/* FIXME: this should really be defined in some more generic place */
678
#define ROUND(V, A) (((((unsigned) (V))-1) | ((A)-1))+1)
679
 
680
extern void _Jv_RegisterBootstrapPackages ();
681
 
682
#define FLAG_BINARYCOMPAT_ABI (1<<31)  /* Class is built with the BC-ABI. */
683
 
684
#define FLAG_BOOTSTRAP_LOADER (1<<30)  /* Used when defining a class that 
685
                                          should be loaded by the bootstrap
686
                                          loader.  */
687
 
688
// These are used to find ABI versions we recognize.
689
#define GCJ_CXX_ABI_VERSION (__GNUC__ * 100000 + __GNUC_MINOR__ * 1000)
690
 
691
// This is the old-style BC version ID used by GCJ 4.0.0.
692
#define OLD_GCJ_40_BC_ABI_VERSION (4 * 10000 + 0 * 10 + 5)
693
 
694
// New style version IDs used by GCJ 4.0.1 and later.
695
#define GCJ_40_BC_ABI_VERSION (4 * 100000 + 0 * 1000)
696
 
697
void _Jv_CheckABIVersion (unsigned long value);
698
 
699
 
700
inline bool
701
_Jv_ClassForBootstrapLoader (unsigned long value)
702
{
703
  return (value & FLAG_BOOTSTRAP_LOADER);
704
}
705
 
706
// It makes the source cleaner if we simply always define this
707
// function.  If the interpreter is not built, it will never return
708
// 'true'.
709
extern inline jboolean
710
_Jv_IsInterpretedClass (jclass c)
711
{
712
  return (c->accflags & java::lang::reflect::Modifier::INTERPRETED) != 0;
713
}
714
 
715
// Return true if the class was compiled with the BC ABI.
716
extern inline jboolean
717
_Jv_IsBinaryCompatibilityABI (jclass c)
718
{
719
  // There isn't really a better test for the ABI type at this point,
720
  // that will work once the class has been registered.
721
  return c->otable_syms || c->atable_syms || c->itable_syms;
722
}
723
 
724
// Returns whether the given class does not really exists (ie. we have no
725
// bytecode) but still allows us to do some very conservative actions.
726
// E.g. throwing a NoClassDefFoundError with the name of the missing
727
// class.
728
extern inline jboolean
729
_Jv_IsPhantomClass (jclass c)
730
{
731
  return c->state == JV_STATE_PHANTOM;
732
}
733
 
734
// A helper function defined in prims.cc.
735
char* _Jv_PrependVersionedLibdir (char* libpath);
736
 
737
 
738
// An enum for use with JvSetThreadState.  We use a C++ enum rather
739
// than the Java enum to avoid problems with class initialization
740
// during VM bootstrap.
741
typedef enum
742
{
743
  JV_BLOCKED,
744
  JV_NEW,
745
  JV_RUNNABLE,
746
  JV_TERMINATED,
747
  JV_TIMED_WAITING,
748
  JV_WAITING
749
} JvThreadState;
750
 
751
// Temporarily set the thread's state.
752
class JvSetThreadState
753
{
754
private:
755
  ::java::lang::Thread *thread;
756
  jint saved;
757
 
758
public:
759
 
760
  // Note that 'cthread' could be NULL -- during VM startup there may
761
  // not be a Thread available.
762
  JvSetThreadState(::java::lang::Thread *cthread, JvThreadState nstate)
763
    : thread (cthread),
764
      saved (cthread ? cthread->state : (jint)JV_NEW)
765
  {
766
    if (thread)
767
      thread->state = nstate;
768
  }
769
 
770
  ~JvSetThreadState()
771
  {
772
    if (thread)
773
      thread->state = saved;
774
  }
775
};
776
 
777
// This structure is used to represent all the data the native side
778
// needs.  An object of this type is assigned to the `data' member of
779
// the Thread class.
780
struct natThread
781
{
782
  // A thread is either alive, dead, or being sent a signal; if it is
783
  // being sent a signal, it is also alive.  Thus, if you want to know
784
  // if a thread is alive, it is sufficient to test alive_status !=
785
  // THREAD_DEAD.
786
  volatile obj_addr_t alive_flag;
787
 
788
  // These are used to interrupt sleep and join calls.  We can share a
789
  // condition variable here since it only ever gets notified when the thread
790
  // exits.
791
  _Jv_Mutex_t join_mutex;
792
  _Jv_ConditionVariable_t join_cond;
793
 
794
  // These are used by Unsafe.park() and Unsafe.unpark().
795
  ParkHelper park_helper;
796
 
797
  // This is private data for the thread system layer.
798
  _Jv_Thread_t *thread;
799
 
800
  // Each thread has its own JNI object.
801
  _Jv_JNIEnv *jni_env;
802
};
803
 
804
#endif /* __JAVA_JVM_H__ */

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