1 /*
2 * Copyright (c) 2002, 2018, 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 env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), errMsg);
77 }
78
79 // JNI ids for some fields, methods
80
81 // libproc handler pointer
82 static jfieldID p_ps_prochandle_ID = 0;
83
84 // libthread.so dlopen handle, thread agent ptr and function pointers
85 static jfieldID libthread_db_handle_ID = 0;
86 static jfieldID p_td_thragent_t_ID = 0;
87 static jfieldID p_td_init_ID = 0;
88 static jfieldID p_td_ta_new_ID = 0;
89 static jfieldID p_td_ta_delete_ID = 0;
90 static jfieldID p_td_ta_thr_iter_ID = 0;
91 static jfieldID p_td_thr_get_info_ID = 0;
92 static jfieldID p_td_ta_map_id2thr_ID = 0;
93 static jfieldID p_td_thr_getgregs_ID = 0;
94
95 // reg index fields
96 static jfieldID pcRegIndex_ID = 0;
97 static jfieldID fpRegIndex_ID = 0;
98
99 // part of the class sharing workaround
100 static jfieldID classes_jsa_fd_ID = 0;
101 static jfieldID p_file_map_header_ID = 0;
102
103 // method ids
104
105 static jmethodID getThreadForThreadId_ID = 0;
106 static jmethodID createSenderFrame_ID = 0;
107 static jmethodID createLoadObject_ID = 0;
108 static jmethodID createClosestSymbol_ID = 0;
109 static jmethodID listAdd_ID = 0;
110
111 /*
112 * Functions we need from libthread_db
113 */
114 typedef td_err_e
115 (*p_td_init_t)(void);
116 typedef td_err_e
117 (*p_td_ta_new_t)(void *, td_thragent_t **);
118 typedef td_err_e
119 (*p_td_ta_delete_t)(td_thragent_t *);
120 typedef td_err_e
121 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
122 td_thr_state_e, int, sigset_t *, unsigned);
123 typedef td_err_e
124 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
125 typedef td_err_e
126 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
127 typedef td_err_e
128 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
129
130 static void
131 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
132 // release libthread_db agent, if we had created
133 p_td_ta_delete_t p_td_ta_delete = 0;
134 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
135
136 td_thragent_t *p_td_thragent_t = 0;
137 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
138 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
139 p_td_ta_delete(p_td_thragent_t);
140 }
141
142 // dlclose libthread_db.so
143 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
144 if (libthread_db_handle != 0) {
145 dlclose(libthread_db_handle);
146 }
147
148 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
149 env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
150 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
151 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
152 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
153 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
154 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
155 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
156 }
157
158
159 static void detach_internal(JNIEnv* env, jobject this_obj) {
160 // clear libthread_db stuff
161 clear_libthread_db_ptrs(env, this_obj);
162
163 // release ptr to ps_prochandle
164 jlong p_ps_prochandle;
165 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
166 if (p_ps_prochandle != 0L) {
167 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
168 }
169
170 // part of the class sharing workaround
171 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
172 if (classes_jsa_fd != -1) {
173 close(classes_jsa_fd);
174 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
175 if (pheader != NULL) {
176 free(pheader);
177 }
178 }
179 }
180
181 // Is it okay to ignore libthread_db failure? Set env var to ignore
182 // libthread_db failure. You can still debug, but will miss threads
183 // related functionality.
184 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
185
186 #define HANDLE_THREADDB_FAILURE(msg) \
187 if (sa_ignore_threaddb) { \
188 printf("libsaproc WARNING: %s\n", msg); \
189 return; \
190 } else { \
191 THROW_NEW_DEBUGGER_EXCEPTION(msg); \
192 }
193
194 #define HANDLE_THREADDB_FAILURE_(msg, ret) \
195 if (sa_ignore_threaddb) { \
196 printf("libsaproc WARNING: %s\n", msg); \
197 return ret; \
198 } else { \
199 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
200 }
201
202 static const char * alt_root = NULL;
203 static int alt_root_len = -1;
204
205 #define SA_ALTROOT "SA_ALTROOT"
206
207 static void init_alt_root() {
208 if (alt_root_len == -1) {
209 alt_root = getenv(SA_ALTROOT);
210 if (alt_root)
211 alt_root_len = strlen(alt_root);
212 else
213 alt_root_len = 0;
214 }
215 }
216
217 // This function is a complete substitute for the open system call
218 // since it's also used to override open calls from libproc to
219 // implement as a pathmap style facility for the SA. If libproc
220 // starts using other interfaces then this might have to extended to
221 // cover other calls.
222 extern "C" int libsaproc_open(const char * name, int oflag, ...) {
223 if (oflag == O_RDONLY) {
224 init_alt_root();
225
226 if (_libsaproc_debug) {
227 printf("libsaproc DEBUG: libsaproc_open %s\n", name);
228 }
229
230 if (alt_root_len > 0) {
231 int fd = -1;
232 char alt_path[PATH_MAX+1];
233
234 strcpy(alt_path, alt_root);
235 strcat(alt_path, name);
236 fd = open(alt_path, O_RDONLY);
237 if (fd >= 0) {
238 if (_libsaproc_debug) {
239 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
240 }
241 return fd;
242 }
243
244 if (strrchr(name, '/')) {
245 strcpy(alt_path, alt_root);
246 strcat(alt_path, strrchr(name, '/'));
247 fd = open(alt_path, O_RDONLY);
248 if (fd >= 0) {
249 if (_libsaproc_debug) {
250 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
251 }
252 return fd;
253 }
254 }
255 }
256 }
257
258 {
259 mode_t mode;
260 va_list ap;
261 va_start(ap, oflag);
262 mode = va_arg(ap, mode_t);
263 va_end(ap);
264
265 return open(name, oflag, mode);
266 }
267 }
268
269
270 static void * pathmap_dlopen(const char * name, int mode) {
271 init_alt_root();
272
273 if (_libsaproc_debug) {
274 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
275 }
276
277 void * handle = NULL;
278 if (alt_root_len > 0) {
279 char alt_path[PATH_MAX+1];
280 strcpy(alt_path, alt_root);
281 strcat(alt_path, name);
282 handle = dlopen(alt_path, mode);
283 if (_libsaproc_debug && handle) {
284 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
285 }
286
287 if (handle == NULL && strrchr(name, '/')) {
288 strcpy(alt_path, alt_root);
289 strcat(alt_path, strrchr(name, '/'));
290 handle = dlopen(alt_path, mode);
291 if (_libsaproc_debug && handle) {
292 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
293 }
294 }
295 }
296 if (handle == NULL) {
297 handle = dlopen(name, mode);
298 }
299 if (_libsaproc_debug) {
300 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%lx\n", name, (unsigned long) handle);
301 }
302 return handle;
303 }
304
305 // libproc and libthread_db callback functions
306
307 extern "C" {
308
309 static int
310 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
311 Debugger* dbg = (Debugger*) cd;
312 JNIEnv* env = dbg->env;
313 jobject this_obj = dbg->this_obj;
314 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
315
316 char *s1 = 0, *s2 = 0;
317 char libthread_db[PATH_MAX];
318
319 if (strstr(object_name, "/libthread.so.") == NULL)
320 return (0);
321
322 /*
323 * We found a libthread.
324 * dlopen() the matching libthread_db and get the thread agent handle.
325 */
326 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
327 (void) strcpy(libthread_db, object_name);
328 s1 = (char*) strstr(object_name, ".so.");
329 s2 = (char*) strstr(libthread_db, ".so.");
330 (void) strcpy(s2, "_db");
331 s2 += 3;
332 (void) strcpy(s2, s1);
333 } else {
334 #ifdef _LP64
335 /*
336 * The victim process is 32-bit, we are 64-bit.
337 * We have to find the 64-bit version of libthread_db
338 * that matches the victim's 32-bit version of libthread.
339 */
340 (void) strcpy(libthread_db, object_name);
341 s1 = (char*) strstr(object_name, "/libthread.so.");
342 s2 = (char*) strstr(libthread_db, "/libthread.so.");
343 (void) strcpy(s2, "/64");
344 s2 += 3;
345 (void) strcpy(s2, s1);
346 s1 = (char*) strstr(s1, ".so.");
347 s2 = (char*) strstr(s2, ".so.");
348 (void) strcpy(s2, "_db");
349 s2 += 3;
350 (void) strcpy(s2, s1);
351 #else
352 return (0);
353 #endif /* _LP64 */
354 }
355
356 void* libthread_db_handle = 0;
357 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
358 char errMsg[PATH_MAX + 256];
359 sprintf(errMsg, "Can't load %s!", libthread_db);
360 HANDLE_THREADDB_FAILURE_(errMsg, 0);
361 }
362 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
363
364 void* tmpPtr = 0;
365 tmpPtr = dlsym(libthread_db_handle, "td_init");
366 if (tmpPtr == 0) {
367 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
368 }
369 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
370
371 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
372 if (tmpPtr == 0) {
373 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
374 }
375 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
376
377 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
378 if (tmpPtr == 0) {
379 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
380 }
381 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
382
383 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
384 if (tmpPtr == 0) {
385 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
386 }
387 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
388
389 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
390 if (tmpPtr == 0) {
391 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
392 }
393 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
394
395 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
396 if (tmpPtr == 0) {
397 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
398 }
399 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
400
401 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
402 if (tmpPtr == 0) {
403 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
404 }
405 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
406
407 return 1;
408 }
409
410 static int
411 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
412 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
413 JNIEnv* env = dbgo->env;
414 jobject this_obj = dbgo->this_obj;
415 jobject list = dbgo->obj;
416
417 td_thrinfo_t thrinfo;
418 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);
419
420 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
421 return (0);
422
423 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
424 CHECK_EXCEPTION_(1);
425 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
426 CHECK_EXCEPTION_(1);
427 return 0;
428 }
429
430 static int
431 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
432
433 if (obj_name) {
434 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
435 JNIEnv* env = dbgo->env;
436 jobject this_obj = dbgo->this_obj;
437 jobject list = dbgo->obj;
438
439 jstring objectName = env->NewStringUTF(obj_name);
440 CHECK_EXCEPTION_(1);
441
442 jlong mapSize = (jlong) pmp->pr_size;
443 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
444 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
445 CHECK_EXCEPTION_(1);
446 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
447 CHECK_EXCEPTION_(1);
448 }
449
450 return 0;
451 }
452
453 // Pstack_iter() proc_stack_f callback prior to Nevada-B159
454 static int
455 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
456 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
457 JNIEnv* env = dbgo2->env;
458 jobject this_obj = dbgo2->this_obj;
459 jobject curFrame = dbgo2->obj2;
460
461 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
462 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
463
464 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
465 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
466
467 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
468 curFrame, pc, fp);
469 CHECK_EXCEPTION_(1);
470 if (dbgo2->obj == 0) {
471 dbgo2->obj = dbgo2->obj2;
472 }
473 return 0;
474 }
475
476 // Pstack_iter() proc_stack_f callback in Nevada-B159 or later
477 /*ARGSUSED*/
478 static int
479 wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc,
480 const long *argv, int frame_flags, int sig) {
481 return(fill_cframe_list(cd, regs, argc, argv));
482 }
483
484 // part of the class sharing workaround
485
486 // FIXME: !!HACK ALERT!!
487
488 // The format of sharing achive file header is needed to read shared heap
489 // file mappings. For now, I am hard coding portion of FileMapHeader here.
490 // Refer to filemap.hpp.
491
492 // FileMapHeader describes the shared space data in the file to be
493 // mapped. This structure gets written to a file. It is not a class, so
494 // that the compilers don't add any compiler-private data to it.
495
496 const int NUM_SHARED_MAPS = 4;
497
498 // Refer to FileMapInfo::_current_version in filemap.hpp
499 const int CURRENT_ARCHIVE_VERSION = 1;
500
501 struct FileMapHeader {
502 int _magic; // identify file type.
503 int _version; // (from enum, above.)
504 size_t _alignment; // how shared archive should be aligned
505
506
507 struct space_info {
508 int _file_offset; // sizeof(this) rounded to vm page size
509 char* _base; // copy-on-write base address
510 size_t _capacity; // for validity checking
511 size_t _used; // for setting space top on read
512
513 bool _read_only; // read only space?
514 bool _allow_exec; // executable code in space?
515
516 } _space[NUM_SHARED_MAPS];
517
518 // Ignore the rest of the FileMapHeader. We don't need those fields here.
519 };
520
521 static bool
522 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
523 jboolean i;
524 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
525 *pvalue = i;
526 return true;
527 } else {
528 return false;
529 }
530 }
531
532 static bool
533 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
534 uintptr_t uip;
535 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
536 *pvalue = uip;
537 return true;
538 } else {
539 return false;
540 }
541 }
542
543 static bool
544 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
545 char ch = ' ';
546 size_t i = 0;
547
548 while (ch != '\0') {
549 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
550 return false;
551
552 if (i < size - 1) {
553 buf[i] = ch;
554 } else { // smaller buffer
555 return false;
556 }
557
558 i++; addr++;
559 }
560
561 buf[i] = '\0';
562 return true;
563 }
564
565 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
566 // mangled symbol name for Arguments::SharedArchivePath
567 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
568
569 static int
570 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
571 Debugger* dbg = (Debugger*) cd;
572 JNIEnv* env = dbg->env;
573 jobject this_obj = dbg->this_obj;
574 const char* jvm_name = 0;
575 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
576 jvm_name = obj_name;
577 } else {
578 return 0;
579 }
580
581 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
582
583 // initialize classes.jsa file descriptor field.
584 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
585
586 // check whether class sharing is on by reading variable "UseSharedSpaces"
587 psaddr_t useSharedSpacesAddr = 0;
588 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
589 if (useSharedSpacesAddr == 0) {
590 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
591 }
592
593 // read the value of the flag "UseSharedSpaces"
594 // Since hotspot types are not available to build this library. So
595 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
596 // which is same as hotspot type "bool".
597 jboolean value = 0;
598 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
599 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
600 } else if ((int)value == 0) {
601 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
602 return 1;
603 }
604
605 char classes_jsa[PATH_MAX];
606 psaddr_t sharedArchivePathAddrAddr = 0;
607 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
608 if (sharedArchivePathAddrAddr == 0) {
609 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
610 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
611 }
612
613 uintptr_t sharedArchivePathAddr = 0;
614 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
615 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
616 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
617 }
618
619 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
620 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
621 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
622 }
623
624 print_debug("looking for %s\n", classes_jsa);
625
626 // open the classes.jsa
627 int fd = libsaproc_open(classes_jsa, O_RDONLY);
628 if (fd < 0) {
629 char errMsg[ERR_MSG_SIZE];
630 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
631 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
632 } else {
633 print_debug("opened shared archive file %s\n", classes_jsa);
634 }
635
636 // parse classes.jsa
637 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
638 if (pheader == NULL) {
639 close(fd);
640 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
641 }
642
643 memset(pheader, 0, sizeof(struct FileMapHeader));
644 // read FileMapHeader
645 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
646 if (n != sizeof(struct FileMapHeader)) {
647 char errMsg[ERR_MSG_SIZE];
648 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
649 close(fd);
650 free(pheader);
651 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
652 }
653
654 // check file magic
655 if (pheader->_magic != 0xf00baba2) {
656 char errMsg[ERR_MSG_SIZE];
657 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
658 classes_jsa, pheader->_magic);
659 close(fd);
660 free(pheader);
661 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
662 }
663
664 // check version
665 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
666 char errMsg[ERR_MSG_SIZE];
667 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
668 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
669 close(fd);
670 free(pheader);
671 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
672 }
673
674 if (_libsaproc_debug) {
675 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
676 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
677 pheader->_space[m]._file_offset, pheader->_space[m]._base,
678 pheader->_space[m]._used, pheader->_space[m]._read_only);
679 }
680 }
681
682 // FIXME: For now, omitting other checks such as VM version etc.
683
684 // store class archive file fd and map header in debugger object fields
685 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
686 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
687 return 1;
688 }
689
690 } // extern "C"
691
692 // error messages for proc_arg_grab failure codes. The messages are
693 // modified versions of comments against corresponding #defines in
694 // libproc.h.
695 static const char* proc_arg_grab_errmsgs[] = {
696 "",
697 /* G_NOPROC */ "No such process",
698 /* G_NOCORE */ "No such core file",
699 /* G_NOPROCORCORE */ "No such process or core",
700 /* G_NOEXEC */ "Cannot locate executable file",
701 /* G_ZOMB */ "Zombie processs",
702 /* G_PERM */ "No permission to attach",
703 /* G_BUSY */ "Another process has already attached",
704 /* G_SYS */ "System process - can not attach",
705 /* G_SELF */ "Process is self - can't debug myself!",
706 /* G_INTR */ "Interrupt received while grabbing",
707 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
708 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
709 /* G_ELF */ "Libelf error while parsing an ELF file",
710 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
711 };
712
713 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
714 jboolean isCopy;
715 int gcode;
716 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
717 CHECK_EXCEPTION;
718
719 // some older versions of libproc.so crash when trying to attach 32 bit
720 // debugger to 64 bit core file. check and throw error.
721 #ifndef _LP64
722 atoi(cmdLine_cstr);
723 if (errno) {
724 // core file
725 int core_fd;
726 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
727 Elf32_Ehdr e32;
728 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
729 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
730 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
731 close(core_fd);
732 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
733 }
734 close(core_fd);
735 }
736 // all other conditions are handled by libproc.so.
737 }
738 #endif
739
740 // connect to process/core
741 ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
742
743 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
744 if (! ph) {
745 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
746 char errMsg[ERR_MSG_SIZE];
747 sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
748 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
749 } else {
750 if (_libsaproc_debug && gcode == G_STRANGE) {
751 perror("libsaproc DEBUG: ");
752 }
753 if (isProcess) {
754 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
755 } else {
756 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
757 }
758 }
759 }
760
761 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
762 // support such cross-bit-debugging. check for that combination and throw error.
763 #ifdef _LP64
764 int data_model;
765 if (ps_pdmodel(ph, &data_model) != PS_OK) {
766 Prelease(ph, PRELEASE_CLEAR);
767 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
768 }
769 if (data_model == PR_MODEL_ILP32) {
770 Prelease(ph, PRELEASE_CLEAR);
771 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
772 }
773 #endif
774
775 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
776
777 Debugger dbg;
778 dbg.env = env;
779 dbg.this_obj = this_obj;
780 jthrowable exception = 0;
781 if (! isProcess) {
782 /*
783 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
784 * These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
785 * in Solaris core.To read shared heap pages, we have to read classes.jsa file.
786 */
787 Pobject_iter(ph, init_classsharing_workaround, &dbg);
788 exception = env->ExceptionOccurred();
789 if (exception) {
790 env->ExceptionClear();
791 detach_internal(env, this_obj);
792 env->Throw(exception);
793 return;
794 }
795 }
796
797 /*
798 * Iterate over the process mappings looking
799 * for libthread and then dlopen the appropriate
800 * libthread_db and get function pointers.
801 */
802 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
803 exception = env->ExceptionOccurred();
804 if (exception) {
805 env->ExceptionClear();
806 if (!sa_ignore_threaddb) {
807 detach_internal(env, this_obj);
808 env->Throw(exception);
809 }
810 return;
811 }
812
813 // init libthread_db and create thread_db agent
814 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
815 if (p_td_init == 0) {
816 if (!sa_ignore_threaddb) {
817 detach_internal(env, this_obj);
818 }
819 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
820 }
821
822 if (p_td_init() != TD_OK) {
823 if (!sa_ignore_threaddb) {
824 detach_internal(env, this_obj);
825 }
826 HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
827 }
828
829 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
830
831 td_thragent_t *p_td_thragent_t = 0;
832 if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
833 if (!sa_ignore_threaddb) {
834 detach_internal(env, this_obj);
835 }
836 HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
837 }
838 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
839
840 }
841
842 /*
843 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
844 * Method: attach0
845 * Signature: (Ljava/lang/String;)V
846 * Description: process detach
847 */
848 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
849 (JNIEnv *env, jobject this_obj, jstring pid) {
850 attach_internal(env, this_obj, pid, JNI_TRUE);
851 }
852
853 /*
854 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
855 * Method: attach0
856 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
857 * Description: core file detach
858 */
859 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
860 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
861 // ignore executable file name, libproc.so can detect a.out name anyway.
862 attach_internal(env, this_obj, corefile, JNI_FALSE);
863 }
864
865
866 /*
867 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
868 * Method: detach0
869 * Signature: ()V
870 * Description: process/core file detach
871 */
872 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
873 (JNIEnv *env, jobject this_obj) {
874 detach_internal(env, this_obj);
875 }
876
877 /*
878 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
879 * Method: getRemoteProcessAddressSize0
880 * Signature: ()I
881 * Description: get process/core address size
882 */
883 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
884 (JNIEnv *env, jobject this_obj) {
885 jlong p_ps_prochandle;
886 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
887 int data_model = PR_MODEL_ILP32;
888 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
889 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
890 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
891 }
892
893 /*
894 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
895 * Method: getPageSize0
896 * Signature: ()I
897 * Description: get process/core page size
898 */
899 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
900 (JNIEnv *env, jobject this_obj) {
901
902 /*
903 We are not yet attached to a java process or core file. getPageSize is called from
904 the constructor of ProcDebuggerLocal. The following won't work!
905
906 jlong p_ps_prochandle;
907 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
908 CHECK_EXCEPTION_(-1);
909 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
910 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
911 : getpagesize();
912
913 So even though core may have been generated with a different page size settings, for now
914 call getpagesize.
915 */
916
917 return getpagesize();
918 }
919
920 /*
921 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
922 * Method: getThreadIntegerRegisterSet0
923 * Signature: (J)[J
924 * Description: get gregset for a given thread specified by thread id
925 */
926 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
927 (JNIEnv *env, jobject this_obj, jlong tid) {
928 // map the thread id to thread handle
929 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);
930
931 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
932 if (p_td_thragent_t == 0) {
933 return 0;
934 }
935
936 td_thrhandle_t thr_handle;
937 if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
938 THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
939 }
940
941 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
942 prgregset_t gregs;
943 p_td_thr_getgregs(&thr_handle, gregs);
944
945 jlongArray res = env->NewLongArray(NPRGREG);
946 CHECK_EXCEPTION_(0);
947 jboolean isCopy;
948 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
949 for (int i = 0; i < NPRGREG; i++) {
950 ptr[i] = (jlong) (uintptr_t) gregs[i];
951 }
952 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
953 return res;
954 }
955
956 /*
957 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
958 * Method: fillThreadList0
959 * Signature: (Ljava/util/List;)V
960 * Description: fills thread list of the debuggee process/core
961 */
962 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
963 (JNIEnv *env, jobject this_obj, jobject list) {
964
965 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
966 if (p_td_thragent_t == 0) {
967 return;
968 }
969
970 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);
971
972 DebuggerWithObject dbgo;
973 dbgo.env = env;
974 dbgo.this_obj = this_obj;
975 dbgo.obj = list;
976
977 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
978 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
979 }
980
981 /*
982 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
983 * Method: fillCFrameList0
984 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
985 * Description: fills CFrame list for a given thread
986 */
987 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
988 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
989 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
990
991 DebuggerWith2Objects dbgo2;
992 dbgo2.env = env;
993 dbgo2.this_obj = this_obj;
994 dbgo2.obj = NULL;
995 dbgo2.obj2 = NULL;
996
997 jboolean isCopy;
998 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
999 CHECK_EXCEPTION_(0);
1000
1001 prgregset_t gregs;
1002 for (int i = 0; i < NPRGREG; i++) {
1003 gregs[i] = (uintptr_t) ptr[i];
1004 }
1005
1006 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
1007 CHECK_EXCEPTION_(0);
1008
1009 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1010 wrapper_fill_cframe_list, &dbgo2);
1011 return dbgo2.obj;
1012 }
1013
1014 /*
1015 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1016 * Method: fillLoadObjectList0
1017 * Signature: (Ljava/util/List;)V
1018 * Description: fills shared objects of the debuggee process/core
1019 */
1020 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
1021 (JNIEnv *env, jobject this_obj, jobject list) {
1022 DebuggerWithObject dbgo;
1023 dbgo.env = env;
1024 dbgo.this_obj = this_obj;
1025 dbgo.obj = list;
1026
1027 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1028 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1029 }
1030
1031 /*
1032 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1033 * Method: readBytesFromProcess0
1034 * Signature: (JJ)[B
1035 * Description: read bytes from debuggee process/core
1036 */
1037 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1038 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1039
1040 jbyteArray array = env->NewByteArray(numBytes);
1041 CHECK_EXCEPTION_(0);
1042 jboolean isCopy;
1043 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1044 CHECK_EXCEPTION_(0);
1045
1046 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1047 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1048 (psaddr_t)address, bufPtr, (size_t)numBytes);
1049
1050 if (ret != PS_OK) {
1051 // part of the class sharing workaround. try shared heap area
1052 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1053 if (classes_jsa_fd != -1 && address != (jlong)0) {
1054 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1055
1056 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1057 // walk through the shared mappings -- we just have 4 of them.
1058 // so, linear walking is okay.
1059 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
1060
1061 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1062 // and hence will be read by libproc. Besides, the file copy may be
1063 // stale because the process might have modified those pages.
1064 if (pheader->_space[m]._read_only) {
1065 jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base;
1066 size_t usedSize = pheader->_space[m]._used;
1067 if (address >= baseAddress && address < (baseAddress + usedSize)) {
1068 // the given address falls in this shared heap area
1069 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1070
1071
1072 // If more data is asked than actually mapped from file, we need to zero fill
1073 // till the end-of-page boundary. But, java array new does that for us. we just
1074 // need to read as much as data available.
1075
1076 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1077
1078 jlong diff = address - baseAddress;
1079 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1080 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1081 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1082 if (bytesRead != bytesToRead) {
1083 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1084 print_debug("shared map read failed\n");
1085 return jbyteArray(0);
1086 } else {
1087 print_debug("shared map read succeeded\n");
1088 env->ReleaseByteArrayElements(array, bufPtr, 0);
1089 return array;
1090 }
1091 } // is in current map
1092 } // is read only map
1093 } // for shared maps
1094 } // classes_jsa_fd != -1
1095 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1096 return jbyteArray(0);
1097 } else {
1098 env->ReleaseByteArrayElements(array, bufPtr, 0);
1099 return array;
1100 }
1101 }
1102
1103 /*
1104 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1105 * Method: writeBytesToProcess0
1106 * Signature: (JJ[B)V
1107 * Description: write bytes into debugger process
1108 */
1109 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1110 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1111 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1112 jboolean isCopy;
1113 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1114 CHECK_EXCEPTION;
1115
1116 if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
1117 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1118 THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
1119 }
1120
1121 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1122 }
1123
1124 /*
1125 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1126 * Method: suspend0
1127 * Signature: ()V
1128 */
1129 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1130 (JNIEnv *env, jobject this_obj) {
1131 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1132 // for now don't check return value. revisit this again.
1133 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1134 }
1135
1136 /*
1137 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1138 * Method: resume0
1139 * Signature: ()V
1140 */
1141 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1142 (JNIEnv *env, jobject this_obj) {
1143 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1144 // for now don't check return value. revisit this again.
1145 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1146 }
1147
1148 /*
1149 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1150 * Method: lookupByName0
1151 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1152 * Description: symbol lookup by name
1153 */
1154 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1155 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1156 jlong p_ps_prochandle;
1157 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1158
1159 jboolean isCopy;
1160 const char* objectName_cstr = NULL;
1161 if (objectName != NULL) {
1162 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1163 CHECK_EXCEPTION_(0);
1164 } else {
1165 objectName_cstr = PR_OBJ_EVERY;
1166 }
1167
1168 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1169 CHECK_EXCEPTION_(0);
1170
1171 psaddr_t symbol_addr = (psaddr_t) 0;
1172 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1173 symbolName_cstr, &symbol_addr);
1174
1175 if (symbol_addr == 0) {
1176 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1177 }
1178
1179 if (objectName_cstr != PR_OBJ_EVERY) {
1180 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1181 }
1182 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1183 return (jlong) (uintptr_t) symbol_addr;
1184 }
1185
1186 /*
1187 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1188 * Method: lookupByAddress0
1189 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1190 * Description: lookup symbol name for a given address
1191 */
1192 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1193 (JNIEnv *env, jobject this_obj, jlong address) {
1194 jlong p_ps_prochandle;
1195 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1196
1197 char nameBuf[SYMBOL_BUF_SIZE + 1];
1198 GElf_Sym sym;
1199 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1200 nameBuf, sizeof(nameBuf), &sym, NULL);
1201 if (res != 0) { // failed
1202 return 0;
1203 }
1204
1205 jstring resSym = env->NewStringUTF(nameBuf);
1206 CHECK_EXCEPTION_(0);
1207
1208 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1209 }
1210
1211 /*
1212 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1213 * Method: demangle0
1214 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1215 */
1216 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1217 (JNIEnv *env, jobject this_object, jstring name) {
1218 jboolean isCopy;
1219 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1220 char buf[2*SYMBOL_BUF_SIZE + 1];
1221 jstring res = 0;
1222 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1223 res = env->NewStringUTF(buf);
1224 } else {
1225 res = name;
1226 }
1227 env->ReleaseStringUTFChars(name, ptr);
1228 return res;
1229 }
1230
1231 /*
1232 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1233 * Method: initIDs
1234 * Signature: ()V
1235 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1236 */
1237 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1238 (JNIEnv *env, jclass clazz) {
1239 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1240 if (_libsaproc_debug) {
1241 // propagate debug mode to libproc.so
1242 static const char* var = "LIBPROC_DEBUG=1";
1243 putenv((char*)var);
1244 }
1245
1246 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1247 if (libproc_handle == 0)
1248 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1249
1250 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1251 CHECK_EXCEPTION;
1252
1253 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1254 CHECK_EXCEPTION;
1255
1256 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1257 CHECK_EXCEPTION;
1258
1259 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1260 CHECK_EXCEPTION;
1261
1262 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1263 CHECK_EXCEPTION;
1264
1265 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1266 CHECK_EXCEPTION;
1267
1268 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1269 CHECK_EXCEPTION;
1270
1271 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1272 CHECK_EXCEPTION;
1273
1274 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1275 CHECK_EXCEPTION;
1276
1277 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1278 CHECK_EXCEPTION;
1279
1280 getThreadForThreadId_ID = env->GetMethodID(clazz,
1281 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1282 CHECK_EXCEPTION;
1283
1284 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1285 CHECK_EXCEPTION;
1286
1287 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1288 CHECK_EXCEPTION;
1289
1290 createSenderFrame_ID = env->GetMethodID(clazz,
1291 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1292 CHECK_EXCEPTION;
1293
1294 createLoadObject_ID = env->GetMethodID(clazz,
1295 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1296 CHECK_EXCEPTION;
1297
1298 createClosestSymbol_ID = env->GetMethodID(clazz,
1299 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1300 CHECK_EXCEPTION;
1301
1302 listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z");
1303 CHECK_EXCEPTION;
1304
1305 // part of the class sharing workaround
1306 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1307 CHECK_EXCEPTION;
1308 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1309 CHECK_EXCEPTION;
1310 }