1 /*
2 * Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "salibproc.h"
26 #include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h"
27 #include <thread_db.h>
28 #include <strings.h>
29 #include <limits.h>
30 #include <demangle.h>
31 #include <stdarg.h>
32 #include <stdlib.h>
33 #include <errno.h>
34
35 #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
36 #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
37 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
38 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
39
40 #define SYMBOL_BUF_SIZE 256
41 #define ERR_MSG_SIZE (PATH_MAX + 256)
42
43 // debug modes
44 static int _libsaproc_debug = 0;
45
46 static void print_debug(const char* format,...) {
47 if (_libsaproc_debug) {
48 va_list alist;
49
50 va_start(alist, format);
51 fputs("libsaproc DEBUG: ", stderr);
52 vfprintf(stderr, format, alist);
53 va_end(alist);
54 }
55 }
56
57 struct Debugger {
58 JNIEnv* env;
59 jobject this_obj;
60 };
61
62 struct DebuggerWithObject : Debugger {
63 jobject obj;
64 };
65
66 struct DebuggerWith2Objects : DebuggerWithObject {
67 jobject obj2;
68 };
69
70 /*
71 * Portions of user thread level detail gathering code is from pstack source
72 * code. See pstack.c in Solaris 2.8 user commands source code.
73 */
74
75 static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
76 jclass clazz = env->FindClass("sun/jvm/hotspot/debugger/DebuggerException");
77 CHECK_EXCEPTION;
78 env->ThrowNew(clazz, errMsg);
79 }
80
81 // JNI ids for some fields, methods
82
83 // libproc handler pointer
84 static jfieldID p_ps_prochandle_ID = 0;
85
86 // libthread.so dlopen handle, thread agent ptr and function pointers
87 static jfieldID libthread_db_handle_ID = 0;
88 static jfieldID p_td_thragent_t_ID = 0;
89 static jfieldID p_td_init_ID = 0;
90 static jfieldID p_td_ta_new_ID = 0;
91 static jfieldID p_td_ta_delete_ID = 0;
92 static jfieldID p_td_ta_thr_iter_ID = 0;
93 static jfieldID p_td_thr_get_info_ID = 0;
94 static jfieldID p_td_ta_map_id2thr_ID = 0;
95 static jfieldID p_td_thr_getgregs_ID = 0;
96
97 // reg index fields
98 static jfieldID pcRegIndex_ID = 0;
99 static jfieldID fpRegIndex_ID = 0;
100
101 // part of the class sharing workaround
102 static jfieldID classes_jsa_fd_ID = 0;
103 static jfieldID p_file_map_header_ID = 0;
104
105 // method ids
106
107 static jmethodID getThreadForThreadId_ID = 0;
108 static jmethodID createSenderFrame_ID = 0;
109 static jmethodID createLoadObject_ID = 0;
110 static jmethodID createClosestSymbol_ID = 0;
111 static jmethodID listAdd_ID = 0;
112
113 /*
114 * Functions we need from libthread_db
115 */
116 typedef td_err_e
117 (*p_td_init_t)(void);
118 typedef td_err_e
119 (*p_td_ta_new_t)(void *, td_thragent_t **);
120 typedef td_err_e
121 (*p_td_ta_delete_t)(td_thragent_t *);
122 typedef td_err_e
123 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
124 td_thr_state_e, int, sigset_t *, unsigned);
125 typedef td_err_e
126 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
127 typedef td_err_e
128 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
129 typedef td_err_e
130 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
131
132 static void
133 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
134 // release libthread_db agent, if we had created
135 p_td_ta_delete_t p_td_ta_delete = 0;
136 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
137
138 td_thragent_t *p_td_thragent_t = 0;
139 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
140 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
141 p_td_ta_delete(p_td_thragent_t);
142 }
143
144 // dlclose libthread_db.so
145 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
146 if (libthread_db_handle != 0) {
147 dlclose(libthread_db_handle);
148 }
149
150 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
151 env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
152 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
153 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
154 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
155 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
156 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
157 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
158 }
159
160
161 static void detach_internal(JNIEnv* env, jobject this_obj) {
162 // clear libthread_db stuff
163 clear_libthread_db_ptrs(env, this_obj);
164
165 // release ptr to ps_prochandle
166 jlong p_ps_prochandle;
167 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
168 if (p_ps_prochandle != 0L) {
169 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
170 }
171
172 // part of the class sharing workaround
173 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
174 if (classes_jsa_fd != -1) {
175 close(classes_jsa_fd);
176 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
177 if (pheader != NULL) {
178 free(pheader);
179 }
180 }
181 }
182
183 // Is it okay to ignore libthread_db failure? Set env var to ignore
184 // libthread_db failure. You can still debug, but will miss threads
185 // related functionality.
186 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
187
188 #define HANDLE_THREADDB_FAILURE(msg) \
189 if (sa_ignore_threaddb) { \
190 printf("libsaproc WARNING: %s\n", msg); \
191 return; \
192 } else { \
193 THROW_NEW_DEBUGGER_EXCEPTION(msg); \
194 }
195
196 #define HANDLE_THREADDB_FAILURE_(msg, ret) \
197 if (sa_ignore_threaddb) { \
198 printf("libsaproc WARNING: %s\n", msg); \
199 return ret; \
200 } else { \
201 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
202 }
203
204 static const char * alt_root = NULL;
205 static int alt_root_len = -1;
206
207 #define SA_ALTROOT "SA_ALTROOT"
208
209 static void init_alt_root() {
210 if (alt_root_len == -1) {
211 alt_root = getenv(SA_ALTROOT);
212 if (alt_root)
213 alt_root_len = strlen(alt_root);
214 else
215 alt_root_len = 0;
216 }
217 }
218
219 // This function is a complete substitute for the open system call
220 // since it's also used to override open calls from libproc to
221 // implement as a pathmap style facility for the SA. If libproc
222 // starts using other interfaces then this might have to extended to
223 // cover other calls.
224 extern "C" JNIEXPORT int JNICALL
225 libsaproc_open(const char * name, int oflag, ...) {
226 if (oflag == O_RDONLY) {
227 init_alt_root();
228
229 if (_libsaproc_debug) {
230 printf("libsaproc DEBUG: libsaproc_open %s\n", name);
231 }
232
233 if (alt_root_len > 0) {
234 int fd = -1;
235 char alt_path[PATH_MAX+1];
236
237 strcpy(alt_path, alt_root);
238 strcat(alt_path, name);
239 fd = open(alt_path, O_RDONLY);
240 if (fd >= 0) {
241 if (_libsaproc_debug) {
242 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
243 }
244 return fd;
245 }
246
247 if (strrchr(name, '/')) {
248 strcpy(alt_path, alt_root);
249 strcat(alt_path, strrchr(name, '/'));
250 fd = open(alt_path, O_RDONLY);
251 if (fd >= 0) {
252 if (_libsaproc_debug) {
253 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
254 }
255 return fd;
256 }
257 }
258 }
259 }
260
261 {
262 mode_t mode;
263 va_list ap;
264 va_start(ap, oflag);
265 mode = va_arg(ap, mode_t);
266 va_end(ap);
267
268 return open(name, oflag, mode);
269 }
270 }
271
272
273 static void * pathmap_dlopen(const char * name, int mode) {
274 init_alt_root();
275
276 if (_libsaproc_debug) {
277 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
278 }
279
280 void * handle = NULL;
281 if (alt_root_len > 0) {
282 char alt_path[PATH_MAX+1];
283 strcpy(alt_path, alt_root);
284 strcat(alt_path, name);
285 handle = dlopen(alt_path, mode);
286 if (_libsaproc_debug && handle) {
287 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
288 }
289
290 if (handle == NULL && strrchr(name, '/')) {
291 strcpy(alt_path, alt_root);
292 strcat(alt_path, strrchr(name, '/'));
293 handle = dlopen(alt_path, mode);
294 if (_libsaproc_debug && handle) {
295 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
296 }
297 }
298 }
299 if (handle == NULL) {
300 handle = dlopen(name, mode);
301 }
302 if (_libsaproc_debug) {
303 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%lx\n", name, (unsigned long) handle);
304 }
305 return handle;
306 }
307
308 // libproc and libthread_db callback functions
309
310 extern "C" {
311
312 static int
313 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
314 Debugger* dbg = (Debugger*) cd;
315 JNIEnv* env = dbg->env;
316 jobject this_obj = dbg->this_obj;
317 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
318
319 char *s1 = 0, *s2 = 0;
320 char libthread_db[PATH_MAX];
321
322 if (strstr(object_name, "/libthread.so.") == NULL)
323 return (0);
324
325 /*
326 * We found a libthread.
327 * dlopen() the matching libthread_db and get the thread agent handle.
328 */
329 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
330 (void) strcpy(libthread_db, object_name);
331 s1 = (char*) strstr(object_name, ".so.");
332 s2 = (char*) strstr(libthread_db, ".so.");
333 (void) strcpy(s2, "_db");
334 s2 += 3;
335 (void) strcpy(s2, s1);
336 } else {
337 #ifdef _LP64
338 /*
339 * The victim process is 32-bit, we are 64-bit.
340 * We have to find the 64-bit version of libthread_db
341 * that matches the victim's 32-bit version of libthread.
342 */
343 (void) strcpy(libthread_db, object_name);
344 s1 = (char*) strstr(object_name, "/libthread.so.");
345 s2 = (char*) strstr(libthread_db, "/libthread.so.");
346 (void) strcpy(s2, "/64");
347 s2 += 3;
348 (void) strcpy(s2, s1);
349 s1 = (char*) strstr(s1, ".so.");
350 s2 = (char*) strstr(s2, ".so.");
351 (void) strcpy(s2, "_db");
352 s2 += 3;
353 (void) strcpy(s2, s1);
354 #else
355 return (0);
356 #endif /* _LP64 */
357 }
358
359 void* libthread_db_handle = 0;
360 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
361 char errMsg[PATH_MAX + 256];
362 sprintf(errMsg, "Can't load %s!", libthread_db);
363 HANDLE_THREADDB_FAILURE_(errMsg, 0);
364 }
365 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
366
367 void* tmpPtr = 0;
368 tmpPtr = dlsym(libthread_db_handle, "td_init");
369 if (tmpPtr == 0) {
370 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
371 }
372 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
373
374 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
375 if (tmpPtr == 0) {
376 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
377 }
378 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
379
380 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
381 if (tmpPtr == 0) {
382 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
383 }
384 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
385
386 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
387 if (tmpPtr == 0) {
388 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
389 }
390 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
391
392 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
393 if (tmpPtr == 0) {
394 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
395 }
396 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
397
398 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
399 if (tmpPtr == 0) {
400 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
401 }
402 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
403
404 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
405 if (tmpPtr == 0) {
406 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
407 }
408 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
409
410 return 1;
411 }
412
413 static int
414 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
415 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
416 JNIEnv* env = dbgo->env;
417 jobject this_obj = dbgo->this_obj;
418 jobject list = dbgo->obj;
419
420 td_thrinfo_t thrinfo;
421 p_td_thr_get_info_t p_td_thr_get_info = (p_td_thr_get_info_t) env->GetLongField(this_obj, p_td_thr_get_info_ID);
422
423 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
424 return (0);
425
426 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
427 CHECK_EXCEPTION_(1);
428 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
429 CHECK_EXCEPTION_(1);
430 return 0;
431 }
432
433 static int
434 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
435
436 if (obj_name) {
437 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
438 JNIEnv* env = dbgo->env;
439 jobject this_obj = dbgo->this_obj;
440 jobject list = dbgo->obj;
441
442 jstring objectName = env->NewStringUTF(obj_name);
443 CHECK_EXCEPTION_(1);
444
445 jlong mapSize = (jlong) pmp->pr_size;
446 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
447 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
448 CHECK_EXCEPTION_(1);
449 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
450 CHECK_EXCEPTION_(1);
451 }
452
453 return 0;
454 }
455
456 // Pstack_iter() proc_stack_f callback prior to Nevada-B159
457 static int
458 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
459 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
460 JNIEnv* env = dbgo2->env;
461 jobject this_obj = dbgo2->this_obj;
462 jobject curFrame = dbgo2->obj2;
463
464 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
465 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
466
467 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
468 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
469
470 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
471 curFrame, pc, fp);
472 CHECK_EXCEPTION_(1);
473 if (dbgo2->obj == 0) {
474 dbgo2->obj = dbgo2->obj2;
475 }
476 return 0;
477 }
478
479 // Pstack_iter() proc_stack_f callback in Nevada-B159 or later
480 /*ARGSUSED*/
481 static int
482 wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc,
483 const long *argv, int frame_flags, int sig) {
484 return(fill_cframe_list(cd, regs, argc, argv));
485 }
486
487 // part of the class sharing workaround
488
489 // FIXME: !!HACK ALERT!!
490
491 // The format of sharing achive file header is needed to read shared heap
492 // file mappings. For now, I am hard coding portion of FileMapHeader here.
493 // Refer to filemap.hpp.
494
495 // FileMapHeader describes the shared space data in the file to be
496 // mapped. This structure gets written to a file. It is not a class, so
497 // that the compilers don't add any compiler-private data to it.
498
499 const int NUM_SHARED_MAPS = 9;
500
501 // Refer to FileMapInfo::_current_version in filemap.hpp
502 const int CURRENT_ARCHIVE_VERSION = 3;
503
504 typedef unsigned char* address;
505 typedef uintptr_t uintx;
506 typedef intptr_t intx;
507
508 struct FileMapHeader {
509 int _magic; // identify file type.
510 int _crc; // header crc checksum.
511 int _version; // (from enum, above.)
512 size_t _alignment; // how shared archive should be aligned
513 int _obj_alignment; // value of ObjectAlignmentInBytes
514 address _narrow_oop_base; // compressed oop encoding base
515 int _narrow_oop_shift; // compressed oop encoding shift
516 bool _compact_strings; // value of CompactStrings
517 uintx _max_heap_size; // java max heap size during dumping
518 int _narrow_oop_mode; // compressed oop encoding mode
519 int _narrow_klass_shift; // save narrow klass base and shift
520 address _narrow_klass_base;
521 char* _misc_data_patching_start;
522 char* _read_only_tables_start;
523 address _cds_i2i_entry_code_buffers;
524 size_t _cds_i2i_entry_code_buffers_size;
525 size_t _core_spaces_size; // number of bytes allocated by the core spaces
526 // (mc, md, ro, rw and od).
527
528
529 struct space_info {
530 int _crc; // crc checksum of the current space
531 size_t _file_offset; // sizeof(this) rounded to vm page size
532 union {
533 char* _base; // copy-on-write base address
534 intx _offset; // offset from the compressed oop encoding base, only used
535 // by archive heap space
536 } _addr;
537 size_t _used; // for setting space top on read
538 // 4991491 NOTICE These are C++ bool's in filemap.hpp and must match up with
539 // the C type matching the C++ bool type on any given platform.
540 // We assume the corresponding C type is char but licensees
541 // may need to adjust the type of these fields.
542 char _read_only; // read only space?
543 char _allow_exec; // executable code in space?
544 } _space[NUM_SHARED_MAPS];
545
546 // Ignore the rest of the FileMapHeader. We don't need those fields here.
547 };
548
549 static bool
550 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
551 jboolean i;
552 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
553 *pvalue = i;
554 return true;
555 } else {
556 return false;
557 }
558 }
559
560 static bool
561 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
562 uintptr_t uip;
563 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
564 *pvalue = uip;
565 return true;
566 } else {
567 return false;
568 }
569 }
570
571 static bool
572 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
573 char ch = ' ';
574 size_t i = 0;
575
576 while (ch != '\0') {
577 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
578 return false;
579
580 if (i < size - 1) {
581 buf[i] = ch;
582 } else { // smaller buffer
583 return false;
584 }
585
586 i++; addr++;
587 }
588
589 buf[i] = '\0';
590 return true;
591 }
592
593 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
594 // mangled symbol name for Arguments::SharedArchivePath
595 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
596
597 static int
598 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
599 Debugger* dbg = (Debugger*) cd;
600 JNIEnv* env = dbg->env;
601 jobject this_obj = dbg->this_obj;
602 const char* jvm_name = 0;
603 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
604 jvm_name = obj_name;
605 } else {
606 return 0;
607 }
608
609 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
610
611 // initialize classes.jsa file descriptor field.
612 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
613
614 // check whether class sharing is on by reading variable "UseSharedSpaces"
615 psaddr_t useSharedSpacesAddr = 0;
616 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
617 if (useSharedSpacesAddr == 0) {
618 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
619 }
620
621 // read the value of the flag "UseSharedSpaces"
622 // Since hotspot types are not available to build this library. So
623 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
624 // which is same as hotspot type "bool".
625 jboolean value = 0;
626 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
627 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
628 } else if ((int)value == 0) {
629 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
630 return 1;
631 }
632
633 char classes_jsa[PATH_MAX];
634 psaddr_t sharedArchivePathAddrAddr = 0;
635 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
636 if (sharedArchivePathAddrAddr == 0) {
637 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
638 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
639 }
640
641 uintptr_t sharedArchivePathAddr = 0;
642 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
643 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
644 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
645 }
646
647 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
648 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
649 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
650 }
651
652 print_debug("looking for %s\n", classes_jsa);
653
654 // open the classes.jsa
655 int fd = libsaproc_open(classes_jsa, O_RDONLY);
656 if (fd < 0) {
657 char errMsg[ERR_MSG_SIZE];
658 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
659 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
660 } else {
661 print_debug("opened shared archive file %s\n", classes_jsa);
662 }
663
664 // parse classes.jsa
665 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
666 if (pheader == NULL) {
667 close(fd);
668 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
669 }
670
671 memset(pheader, 0, sizeof(struct FileMapHeader));
672 // read FileMapHeader
673 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
674 if (n != sizeof(struct FileMapHeader)) {
675 char errMsg[ERR_MSG_SIZE];
676 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
677 close(fd);
678 free(pheader);
679 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
680 }
681
682 // check file magic
683 if (pheader->_magic != 0xf00baba2) {
684 char errMsg[ERR_MSG_SIZE];
685 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
686 classes_jsa, pheader->_magic);
687 close(fd);
688 free(pheader);
689 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
690 }
691
692 // check version
693 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
694 char errMsg[ERR_MSG_SIZE];
695 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
696 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
697 close(fd);
698 free(pheader);
699 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
700 }
701
702 if (_libsaproc_debug) {
703 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
704 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
705 pheader->_space[m]._file_offset, pheader->_space[m]._addr._base,
706 pheader->_space[m]._used, pheader->_space[m]._read_only);
707 }
708 }
709
710 // FIXME: For now, omitting other checks such as VM version etc.
711
712 // store class archive file fd and map header in debugger object fields
713 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
714 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
715 return 1;
716 }
717
718 } // extern "C"
719
720 // error messages for proc_arg_grab failure codes. The messages are
721 // modified versions of comments against corresponding #defines in
722 // libproc.h.
723 static const char* proc_arg_grab_errmsgs[] = {
724 "",
725 /* G_NOPROC */ "No such process",
726 /* G_NOCORE */ "No such core file",
727 /* G_NOPROCORCORE */ "No such process or core",
728 /* G_NOEXEC */ "Cannot locate executable file",
729 /* G_ZOMB */ "Zombie processs",
730 /* G_PERM */ "No permission to attach",
731 /* G_BUSY */ "Another process has already attached",
732 /* G_SYS */ "System process - can not attach",
733 /* G_SELF */ "Process is self - can't debug myself!",
734 /* G_INTR */ "Interrupt received while grabbing",
735 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
736 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
737 /* G_ELF */ "Libelf error while parsing an ELF file",
738 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
739 };
740
741 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
742 jboolean isCopy;
743 int gcode;
744 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
745 char errMsg[ERR_MSG_SIZE];
746 td_err_e te;
747 CHECK_EXCEPTION;
748 if (cmdLine_cstr == NULL) {
749 return;
750 }
751
752 // some older versions of libproc.so crash when trying to attach 32 bit
753 // debugger to 64 bit core file. check and throw error.
754 #ifndef _LP64
755 errno = 0;
756 strtol(cmdLine_cstr, NULL, 10);
757 if (errno) {
758 // core file
759 int core_fd;
760 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
761 Elf32_Ehdr e32;
762 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
763 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
764 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
765 close(core_fd);
766 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
767 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
768 }
769 close(core_fd);
770 }
771 // all other conditions are handled by libproc.so.
772 }
773 #endif
774
775 // connect to process/core
776 ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
777
778 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
779
780 if (! ph) {
781 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
782 snprintf(errMsg, ERR_MSG_SIZE, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
783 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
784 } else {
785 if (_libsaproc_debug && gcode == G_STRANGE) {
786 perror("libsaproc DEBUG: ");
787 }
788 if (isProcess) {
789 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
790 } else {
791 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
792 }
793 }
794 }
795
796 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
797 // support such cross-bit-debugging. check for that combination and throw error.
798 #ifdef _LP64
799 int data_model;
800 if (ps_pdmodel(ph, &data_model) != PS_OK) {
801 Prelease(ph, PRELEASE_CLEAR);
802 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
803 }
804 if (data_model == PR_MODEL_ILP32) {
805 Prelease(ph, PRELEASE_CLEAR);
806 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
807 }
808 #endif
809
810 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
811
812 Debugger dbg;
813 dbg.env = env;
814 dbg.this_obj = this_obj;
815 jthrowable exception = 0;
816 if (! isProcess) {
817 /*
818 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
819 * These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
820 * in Solaris core.To read shared heap pages, we have to read classes.jsa file.
821 */
822 Pobject_iter(ph, init_classsharing_workaround, &dbg);
823 exception = env->ExceptionOccurred();
824 if (exception) {
825 env->ExceptionClear();
826 detach_internal(env, this_obj);
827 env->Throw(exception);
828 return;
829 }
830 }
831
832 /*
833 * Iterate over the process mappings looking
834 * for libthread and then dlopen the appropriate
835 * libthread_db and get function pointers.
836 */
837 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
838 exception = env->ExceptionOccurred();
839 if (exception) {
840 env->ExceptionClear();
841 if (!sa_ignore_threaddb) {
842 detach_internal(env, this_obj);
843 env->Throw(exception);
844 }
845 return;
846 }
847
848 // init libthread_db and create thread_db agent
849 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
850 if (p_td_init == 0) {
851 if (!sa_ignore_threaddb) {
852 detach_internal(env, this_obj);
853 }
854 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
855 }
856
857 te = p_td_init();
858 if (te != TD_OK) {
859 if (!sa_ignore_threaddb) {
860 detach_internal(env, this_obj);
861 }
862 snprintf(errMsg, ERR_MSG_SIZE, "Can't initialize thread_db! td_init failed: %d", te);
863 HANDLE_THREADDB_FAILURE(errMsg);
864 }
865
866 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
867
868 td_thragent_t *p_td_thragent_t = 0;
869 te = p_td_ta_new(ph, &p_td_thragent_t);
870 if (te != TD_OK) {
871 if (!sa_ignore_threaddb) {
872 detach_internal(env, this_obj);
873 }
874 snprintf(errMsg, ERR_MSG_SIZE, "Can't create thread_db agent! td_ta_new failed: %d", te);
875 HANDLE_THREADDB_FAILURE(errMsg);
876 }
877 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
878
879 }
880
881 /*
882 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
883 * Method: attach0
884 * Signature: (Ljava/lang/String;)V
885 * Description: process detach
886 */
887 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
888 (JNIEnv *env, jobject this_obj, jstring pid) {
889 attach_internal(env, this_obj, pid, JNI_TRUE);
890 }
891
892 /*
893 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
894 * Method: attach0
895 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
896 * Description: core file detach
897 */
898 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
899 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
900 // ignore executable file name, libproc.so can detect a.out name anyway.
901 attach_internal(env, this_obj, corefile, JNI_FALSE);
902 }
903
904
905 /*
906 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
907 * Method: detach0
908 * Signature: ()V
909 * Description: process/core file detach
910 */
911 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
912 (JNIEnv *env, jobject this_obj) {
913 detach_internal(env, this_obj);
914 }
915
916 /*
917 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
918 * Method: getRemoteProcessAddressSize0
919 * Signature: ()I
920 * Description: get process/core address size
921 */
922 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
923 (JNIEnv *env, jobject this_obj) {
924 jlong p_ps_prochandle;
925 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
926 int data_model = PR_MODEL_ILP32;
927 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
928 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
929 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
930 }
931
932 /*
933 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
934 * Method: getPageSize0
935 * Signature: ()I
936 * Description: get process/core page size
937 */
938 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
939 (JNIEnv *env, jobject this_obj) {
940
941 /*
942 We are not yet attached to a java process or core file. getPageSize is called from
943 the constructor of ProcDebuggerLocal. The following won't work!
944
945 jlong p_ps_prochandle;
946 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
947 CHECK_EXCEPTION_(-1);
948 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
949 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
950 : getpagesize();
951
952 So even though core may have been generated with a different page size settings, for now
953 call getpagesize.
954 */
955
956 return getpagesize();
957 }
958
959 /*
960 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
961 * Method: getThreadIntegerRegisterSet0
962 * Signature: (J)[J
963 * Description: get gregset for a given thread specified by thread id
964 */
965 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
966 (JNIEnv *env, jobject this_obj, jlong tid) {
967 char errMsg[ERR_MSG_SIZE];
968 td_err_e te;
969 // map the thread id to thread handle
970 p_td_ta_map_id2thr_t p_td_ta_map_id2thr = (p_td_ta_map_id2thr_t) env->GetLongField(this_obj, p_td_ta_map_id2thr_ID);
971
972 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
973 if (p_td_thragent_t == 0) {
974 return 0;
975 }
976
977 td_thrhandle_t thr_handle;
978 te = p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle);
979 if (te != TD_OK) {
980 snprintf(errMsg, ERR_MSG_SIZE, "can't map thread id to thread handle! td_ta_map_id2thr failed: %d", te);
981 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 0);
982 }
983
984 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
985 prgregset_t gregs;
986 p_td_thr_getgregs(&thr_handle, gregs);
987
988 jlongArray res = env->NewLongArray(NPRGREG);
989 CHECK_EXCEPTION_(0);
990 jboolean isCopy;
991 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
992 CHECK_EXCEPTION_(NULL);
993 for (int i = 0; i < NPRGREG; i++) {
994 ptr[i] = (jlong) (uintptr_t) gregs[i];
995 }
996 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
997 return res;
998 }
999
1000 /*
1001 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1002 * Method: fillThreadList0
1003 * Signature: (Ljava/util/List;)V
1004 * Description: fills thread list of the debuggee process/core
1005 */
1006 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
1007 (JNIEnv *env, jobject this_obj, jobject list) {
1008
1009 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
1010 if (p_td_thragent_t == 0) {
1011 return;
1012 }
1013
1014 p_td_ta_thr_iter_t p_td_ta_thr_iter = (p_td_ta_thr_iter_t) env->GetLongField(this_obj, p_td_ta_thr_iter_ID);
1015
1016 DebuggerWithObject dbgo;
1017 dbgo.env = env;
1018 dbgo.this_obj = this_obj;
1019 dbgo.obj = list;
1020
1021 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
1022 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
1023 }
1024
1025 /*
1026 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1027 * Method: fillCFrameList0
1028 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
1029 * Description: fills CFrame list for a given thread
1030 */
1031 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
1032 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
1033 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1034
1035 DebuggerWith2Objects dbgo2;
1036 dbgo2.env = env;
1037 dbgo2.this_obj = this_obj;
1038 dbgo2.obj = NULL;
1039 dbgo2.obj2 = NULL;
1040
1041 jboolean isCopy;
1042 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
1043 CHECK_EXCEPTION_(0);
1044
1045 prgregset_t gregs;
1046 for (int i = 0; i < NPRGREG; i++) {
1047 gregs[i] = (uintptr_t) ptr[i];
1048 }
1049
1050 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
1051 CHECK_EXCEPTION_(0);
1052
1053 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1054 wrapper_fill_cframe_list, &dbgo2);
1055 return dbgo2.obj;
1056 }
1057
1058 /*
1059 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1060 * Method: fillLoadObjectList0
1061 * Signature: (Ljava/util/List;)V
1062 * Description: fills shared objects of the debuggee process/core
1063 */
1064 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
1065 (JNIEnv *env, jobject this_obj, jobject list) {
1066 DebuggerWithObject dbgo;
1067 dbgo.env = env;
1068 dbgo.this_obj = this_obj;
1069 dbgo.obj = list;
1070
1071 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1072 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1073 }
1074
1075 /*
1076 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1077 * Method: readBytesFromProcess0
1078 * Signature: (JJ)[B
1079 * Description: read bytes from debuggee process/core
1080 */
1081 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1082 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1083
1084 jbyteArray array = env->NewByteArray(numBytes);
1085 CHECK_EXCEPTION_(0);
1086 jboolean isCopy;
1087 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1088 CHECK_EXCEPTION_(0);
1089
1090 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1091 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1092 (psaddr_t)address, bufPtr, (size_t)numBytes);
1093
1094 if (ret != PS_OK) {
1095 // part of the class sharing workaround. try shared heap area
1096 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1097 if (classes_jsa_fd != -1 && address != (jlong)0) {
1098 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1099
1100 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1101 // walk through the shared mappings -- we just have 9 of them.
1102 // so, linear walking is okay.
1103 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
1104
1105 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1106 // and hence will be read by libproc. Besides, the file copy may be
1107 // stale because the process might have modified those pages.
1108 if (pheader->_space[m]._read_only) {
1109 jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._addr._base;
1110 size_t usedSize = pheader->_space[m]._used;
1111 if (address >= baseAddress && address < (baseAddress + usedSize)) {
1112 // the given address falls in this shared heap area
1113 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1114
1115
1116 // If more data is asked than actually mapped from file, we need to zero fill
1117 // till the end-of-page boundary. But, java array new does that for us. we just
1118 // need to read as much as data available.
1119
1120 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1121
1122 jlong diff = address - baseAddress;
1123 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1124 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1125 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1126 if (bytesRead != bytesToRead) {
1127 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1128 print_debug("shared map read failed\n");
1129 return jbyteArray(0);
1130 } else {
1131 print_debug("shared map read succeeded\n");
1132 env->ReleaseByteArrayElements(array, bufPtr, 0);
1133 return array;
1134 }
1135 } // is in current map
1136 } // is read only map
1137 } // for shared maps
1138 } // classes_jsa_fd != -1
1139 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1140 return jbyteArray(0);
1141 } else {
1142 env->ReleaseByteArrayElements(array, bufPtr, 0);
1143 return array;
1144 }
1145 }
1146
1147 /*
1148 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1149 * Method: writeBytesToProcess0
1150 * Signature: (JJ[B)V
1151 * Description: write bytes into debugger process
1152 */
1153 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1154 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1155 char errMsg[ERR_MSG_SIZE];
1156 ps_err_e pe;
1157 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1158 jboolean isCopy;
1159 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1160 CHECK_EXCEPTION;
1161
1162 pe = ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes);
1163 if (pe != PS_OK) {
1164 snprintf(errMsg, ERR_MSG_SIZE, "Process write failed! ps_pwrite failed: %d", pe);
1165 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1166 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
1167 }
1168
1169 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1170 }
1171
1172 /*
1173 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1174 * Method: suspend0
1175 * Signature: ()V
1176 */
1177 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1178 (JNIEnv *env, jobject this_obj) {
1179 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1180 // for now don't check return value. revisit this again.
1181 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1182 }
1183
1184 /*
1185 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1186 * Method: resume0
1187 * Signature: ()V
1188 */
1189 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1190 (JNIEnv *env, jobject this_obj) {
1191 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1192 // for now don't check return value. revisit this again.
1193 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1194 }
1195
1196 /*
1197 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1198 * Method: lookupByName0
1199 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1200 * Description: symbol lookup by name
1201 */
1202 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1203 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1204 jlong p_ps_prochandle;
1205 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1206
1207 jboolean isCopy;
1208 const char* objectName_cstr = NULL;
1209 if (objectName != NULL) {
1210 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1211 CHECK_EXCEPTION_(0);
1212 } else {
1213 objectName_cstr = PR_OBJ_EVERY;
1214 }
1215
1216 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1217 CHECK_EXCEPTION_(0);
1218
1219 psaddr_t symbol_addr = (psaddr_t) 0;
1220 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1221 symbolName_cstr, &symbol_addr);
1222
1223 if (symbol_addr == 0) {
1224 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1225 }
1226
1227 if (objectName_cstr != PR_OBJ_EVERY) {
1228 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1229 }
1230 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1231 return (jlong) (uintptr_t) symbol_addr;
1232 }
1233
1234 /*
1235 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1236 * Method: lookupByAddress0
1237 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1238 * Description: lookup symbol name for a given address
1239 */
1240 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1241 (JNIEnv *env, jobject this_obj, jlong address) {
1242 jlong p_ps_prochandle;
1243 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1244
1245 char nameBuf[SYMBOL_BUF_SIZE + 1];
1246 GElf_Sym sym;
1247 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1248 nameBuf, sizeof(nameBuf), &sym, NULL);
1249
1250 if (res != 0) { // failed
1251 return 0;
1252 }
1253
1254 jstring resSym = env->NewStringUTF(nameBuf);
1255 CHECK_EXCEPTION_(0);
1256
1257 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1258 }
1259
1260 /*
1261 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1262 * Method: demangle0
1263 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1264 */
1265 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1266 (JNIEnv *env, jobject this_object, jstring name) {
1267 jboolean isCopy;
1268 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1269 CHECK_EXCEPTION_(NULL);
1270 char buf[2*SYMBOL_BUF_SIZE + 1];
1271 jstring res = 0;
1272 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1273 res = env->NewStringUTF(buf);
1274 } else {
1275 res = name;
1276 }
1277 env->ReleaseStringUTFChars(name, ptr);
1278 return res;
1279 }
1280
1281 /*
1282 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1283 * Method: initIDs
1284 * Signature: ()V
1285 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1286 */
1287 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1288 (JNIEnv *env, jclass clazz) {
1289 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1290 if (_libsaproc_debug) {
1291 // propagate debug mode to libproc.so
1292 static const char* var = "LIBPROC_DEBUG=1";
1293 putenv((char*)var);
1294 }
1295
1296 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1297 if (libproc_handle == 0)
1298 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1299
1300 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1301 CHECK_EXCEPTION;
1302
1303 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1304 CHECK_EXCEPTION;
1305
1306 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1307 CHECK_EXCEPTION;
1308
1309 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1310 CHECK_EXCEPTION;
1311
1312 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1313 CHECK_EXCEPTION;
1314
1315 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1316 CHECK_EXCEPTION;
1317
1318 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1319 CHECK_EXCEPTION;
1320
1321 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1322 CHECK_EXCEPTION;
1323
1324 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1325 CHECK_EXCEPTION;
1326
1327 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1328 CHECK_EXCEPTION;
1329
1330 getThreadForThreadId_ID = env->GetMethodID(clazz,
1331 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1332 CHECK_EXCEPTION;
1333
1334 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1335 CHECK_EXCEPTION;
1336
1337 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1338 CHECK_EXCEPTION;
1339
1340 createSenderFrame_ID = env->GetMethodID(clazz,
1341 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1342 CHECK_EXCEPTION;
1343
1344 createLoadObject_ID = env->GetMethodID(clazz,
1345 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1346 CHECK_EXCEPTION;
1347
1348 createClosestSymbol_ID = env->GetMethodID(clazz,
1349 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1350 CHECK_EXCEPTION;
1351
1352 jclass list_clazz = env->FindClass("java/util/List");
1353 CHECK_EXCEPTION;
1354 listAdd_ID = env->GetMethodID(list_clazz, "add", "(Ljava/lang/Object;)Z");
1355 CHECK_EXCEPTION;
1356
1357 // part of the class sharing workaround
1358 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1359 CHECK_EXCEPTION;
1360 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1361 CHECK_EXCEPTION;
1362 }