1 /*
2 * Copyright (c) 2002, 2016, 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 = 4;
500
501 // Refer to FileMapInfo::_current_version in filemap.hpp
502 const int CURRENT_ARCHIVE_VERSION = 1;
503
504 struct FileMapHeader {
505 int _magic; // identify file type.
506 int _version; // (from enum, above.)
507 size_t _alignment; // how shared archive should be aligned
508
509
510 struct space_info {
511 int _file_offset; // sizeof(this) rounded to vm page size
512 char* _base; // copy-on-write base address
513 size_t _capacity; // for validity checking
514 size_t _used; // for setting space top on read
515
516 bool _read_only; // read only space?
517 bool _allow_exec; // executable code in space?
518
519 } _space[NUM_SHARED_MAPS];
520
521 // Ignore the rest of the FileMapHeader. We don't need those fields here.
522 };
523
524 static bool
525 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
526 jboolean i;
527 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
528 *pvalue = i;
529 return true;
530 } else {
531 return false;
532 }
533 }
534
535 static bool
536 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
537 uintptr_t uip;
538 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
539 *pvalue = uip;
540 return true;
541 } else {
542 return false;
543 }
544 }
545
546 static bool
547 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
548 char ch = ' ';
549 size_t i = 0;
550
551 while (ch != '\0') {
552 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
553 return false;
554
555 if (i < size - 1) {
556 buf[i] = ch;
557 } else { // smaller buffer
558 return false;
559 }
560
561 i++; addr++;
562 }
563
564 buf[i] = '\0';
565 return true;
566 }
567
568 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
569 // mangled symbol name for Arguments::SharedArchivePath
570 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
571
572 static int
573 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
574 Debugger* dbg = (Debugger*) cd;
575 JNIEnv* env = dbg->env;
576 jobject this_obj = dbg->this_obj;
577 const char* jvm_name = 0;
578 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
579 jvm_name = obj_name;
580 } else {
581 return 0;
582 }
583
584 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
585
586 // initialize classes.jsa file descriptor field.
587 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
588
589 // check whether class sharing is on by reading variable "UseSharedSpaces"
590 psaddr_t useSharedSpacesAddr = 0;
591 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
592 if (useSharedSpacesAddr == 0) {
593 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
594 }
595
596 // read the value of the flag "UseSharedSpaces"
597 // Since hotspot types are not available to build this library. So
598 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
599 // which is same as hotspot type "bool".
600 jboolean value = 0;
601 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
602 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
603 } else if ((int)value == 0) {
604 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
605 return 1;
606 }
607
608 char classes_jsa[PATH_MAX];
609 psaddr_t sharedArchivePathAddrAddr = 0;
610 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
611 if (sharedArchivePathAddrAddr == 0) {
612 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
613 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
614 }
615
616 uintptr_t sharedArchivePathAddr = 0;
617 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
618 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
619 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
620 }
621
622 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
623 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
624 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
625 }
626
627 print_debug("looking for %s\n", classes_jsa);
628
629 // open the classes.jsa
630 int fd = libsaproc_open(classes_jsa, O_RDONLY);
631 if (fd < 0) {
632 char errMsg[ERR_MSG_SIZE];
633 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
634 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
635 } else {
636 print_debug("opened shared archive file %s\n", classes_jsa);
637 }
638
639 // parse classes.jsa
640 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
641 if (pheader == NULL) {
642 close(fd);
643 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
644 }
645
646 memset(pheader, 0, sizeof(struct FileMapHeader));
647 // read FileMapHeader
648 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
649 if (n != sizeof(struct FileMapHeader)) {
650 char errMsg[ERR_MSG_SIZE];
651 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
652 close(fd);
653 free(pheader);
654 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
655 }
656
657 // check file magic
658 if (pheader->_magic != 0xf00baba2) {
659 char errMsg[ERR_MSG_SIZE];
660 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
661 classes_jsa, pheader->_magic);
662 close(fd);
663 free(pheader);
664 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
665 }
666
667 // check version
668 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
669 char errMsg[ERR_MSG_SIZE];
670 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
671 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
672 close(fd);
673 free(pheader);
674 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
675 }
676
677 if (_libsaproc_debug) {
678 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
679 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
680 pheader->_space[m]._file_offset, pheader->_space[m]._base,
681 pheader->_space[m]._used, pheader->_space[m]._read_only);
682 }
683 }
684
685 // FIXME: For now, omitting other checks such as VM version etc.
686
687 // store class archive file fd and map header in debugger object fields
688 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
689 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
690 return 1;
691 }
692
693 } // extern "C"
694
695 // error messages for proc_arg_grab failure codes. The messages are
696 // modified versions of comments against corresponding #defines in
697 // libproc.h.
698 static const char* proc_arg_grab_errmsgs[] = {
699 "",
700 /* G_NOPROC */ "No such process",
701 /* G_NOCORE */ "No such core file",
702 /* G_NOPROCORCORE */ "No such process or core",
703 /* G_NOEXEC */ "Cannot locate executable file",
704 /* G_ZOMB */ "Zombie processs",
705 /* G_PERM */ "No permission to attach",
706 /* G_BUSY */ "Another process has already attached",
707 /* G_SYS */ "System process - can not attach",
708 /* G_SELF */ "Process is self - can't debug myself!",
709 /* G_INTR */ "Interrupt received while grabbing",
710 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
711 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
712 /* G_ELF */ "Libelf error while parsing an ELF file",
713 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
714 };
715
716 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
717 jboolean isCopy;
718 int gcode;
719 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
720 CHECK_EXCEPTION;
721
722 // some older versions of libproc.so crash when trying to attach 32 bit
723 // debugger to 64 bit core file. check and throw error.
724 #ifndef _LP64
725 atoi(cmdLine_cstr);
726 if (errno) {
727 // core file
728 int core_fd;
729 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
730 Elf32_Ehdr e32;
731 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
732 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
733 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
734 close(core_fd);
735 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
736 }
737 close(core_fd);
738 }
739 // all other conditions are handled by libproc.so.
740 }
741 #endif
742
743 // connect to process/core
744 ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
745
746 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
747 if (! ph) {
748 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
749 char errMsg[ERR_MSG_SIZE];
750 sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
751 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
752 } else {
753 if (_libsaproc_debug && gcode == G_STRANGE) {
754 perror("libsaproc DEBUG: ");
755 }
756 if (isProcess) {
757 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
758 } else {
759 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
760 }
761 }
762 }
763
764 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
765 // support such cross-bit-debugging. check for that combination and throw error.
766 #ifdef _LP64
767 int data_model;
768 if (ps_pdmodel(ph, &data_model) != PS_OK) {
769 Prelease(ph, PRELEASE_CLEAR);
770 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
771 }
772 if (data_model == PR_MODEL_ILP32) {
773 Prelease(ph, PRELEASE_CLEAR);
774 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
775 }
776 #endif
777
778 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
779
780 Debugger dbg;
781 dbg.env = env;
782 dbg.this_obj = this_obj;
783 jthrowable exception = 0;
784 if (! isProcess) {
785 /*
786 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
787 * These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
788 * in Solaris core.To read shared heap pages, we have to read classes.jsa file.
789 */
790 Pobject_iter(ph, init_classsharing_workaround, &dbg);
791 exception = env->ExceptionOccurred();
792 if (exception) {
793 env->ExceptionClear();
794 detach_internal(env, this_obj);
795 env->Throw(exception);
796 return;
797 }
798 }
799
800 /*
801 * Iterate over the process mappings looking
802 * for libthread and then dlopen the appropriate
803 * libthread_db and get function pointers.
804 */
805 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
806 exception = env->ExceptionOccurred();
807 if (exception) {
808 env->ExceptionClear();
809 if (!sa_ignore_threaddb) {
810 detach_internal(env, this_obj);
811 env->Throw(exception);
812 }
813 return;
814 }
815
816 // init libthread_db and create thread_db agent
817 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
818 if (p_td_init == 0) {
819 if (!sa_ignore_threaddb) {
820 detach_internal(env, this_obj);
821 }
822 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
823 }
824
825 if (p_td_init() != TD_OK) {
826 if (!sa_ignore_threaddb) {
827 detach_internal(env, this_obj);
828 }
829 HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
830 }
831
832 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
833
834 td_thragent_t *p_td_thragent_t = 0;
835 if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
836 if (!sa_ignore_threaddb) {
837 detach_internal(env, this_obj);
838 }
839 HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
840 }
841 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
842
843 }
844
845 /*
846 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
847 * Method: attach0
848 * Signature: (Ljava/lang/String;)V
849 * Description: process detach
850 */
851 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
852 (JNIEnv *env, jobject this_obj, jstring pid) {
853 attach_internal(env, this_obj, pid, JNI_TRUE);
854 }
855
856 /*
857 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
858 * Method: attach0
859 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
860 * Description: core file detach
861 */
862 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
863 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
864 // ignore executable file name, libproc.so can detect a.out name anyway.
865 attach_internal(env, this_obj, corefile, JNI_FALSE);
866 }
867
868
869 /*
870 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
871 * Method: detach0
872 * Signature: ()V
873 * Description: process/core file detach
874 */
875 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
876 (JNIEnv *env, jobject this_obj) {
877 detach_internal(env, this_obj);
878 }
879
880 /*
881 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
882 * Method: getRemoteProcessAddressSize0
883 * Signature: ()I
884 * Description: get process/core address size
885 */
886 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
887 (JNIEnv *env, jobject this_obj) {
888 jlong p_ps_prochandle;
889 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
890 int data_model = PR_MODEL_ILP32;
891 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
892 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
893 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
894 }
895
896 /*
897 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
898 * Method: getPageSize0
899 * Signature: ()I
900 * Description: get process/core page size
901 */
902 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
903 (JNIEnv *env, jobject this_obj) {
904
905 /*
906 We are not yet attached to a java process or core file. getPageSize is called from
907 the constructor of ProcDebuggerLocal. The following won't work!
908
909 jlong p_ps_prochandle;
910 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
911 CHECK_EXCEPTION_(-1);
912 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
913 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
914 : getpagesize();
915
916 So even though core may have been generated with a different page size settings, for now
917 call getpagesize.
918 */
919
920 return getpagesize();
921 }
922
923 /*
924 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
925 * Method: getThreadIntegerRegisterSet0
926 * Signature: (J)[J
927 * Description: get gregset for a given thread specified by thread id
928 */
929 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
930 (JNIEnv *env, jobject this_obj, jlong tid) {
931 // map the thread id to thread handle
932 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);
933
934 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
935 if (p_td_thragent_t == 0) {
936 return 0;
937 }
938
939 td_thrhandle_t thr_handle;
940 if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
941 THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
942 }
943
944 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
945 prgregset_t gregs;
946 p_td_thr_getgregs(&thr_handle, gregs);
947
948 jlongArray res = env->NewLongArray(NPRGREG);
949 CHECK_EXCEPTION_(0);
950 jboolean isCopy;
951 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
952 CHECK_EXCEPTION_(NULL);
953 for (int i = 0; i < NPRGREG; i++) {
954 ptr[i] = (jlong) (uintptr_t) gregs[i];
955 }
956 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
957 return res;
958 }
959
960 /*
961 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
962 * Method: fillThreadList0
963 * Signature: (Ljava/util/List;)V
964 * Description: fills thread list of the debuggee process/core
965 */
966 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
967 (JNIEnv *env, jobject this_obj, jobject list) {
968
969 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
970 if (p_td_thragent_t == 0) {
971 return;
972 }
973
974 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);
975
976 DebuggerWithObject dbgo;
977 dbgo.env = env;
978 dbgo.this_obj = this_obj;
979 dbgo.obj = list;
980
981 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
982 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
983 }
984
985 /*
986 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
987 * Method: fillCFrameList0
988 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
989 * Description: fills CFrame list for a given thread
990 */
991 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
992 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
993 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
994
995 DebuggerWith2Objects dbgo2;
996 dbgo2.env = env;
997 dbgo2.this_obj = this_obj;
998 dbgo2.obj = NULL;
999 dbgo2.obj2 = NULL;
1000
1001 jboolean isCopy;
1002 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
1003 CHECK_EXCEPTION_(0);
1004
1005 prgregset_t gregs;
1006 for (int i = 0; i < NPRGREG; i++) {
1007 gregs[i] = (uintptr_t) ptr[i];
1008 }
1009
1010 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
1011 CHECK_EXCEPTION_(0);
1012
1013 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1014 wrapper_fill_cframe_list, &dbgo2);
1015 return dbgo2.obj;
1016 }
1017
1018 /*
1019 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1020 * Method: fillLoadObjectList0
1021 * Signature: (Ljava/util/List;)V
1022 * Description: fills shared objects of the debuggee process/core
1023 */
1024 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
1025 (JNIEnv *env, jobject this_obj, jobject list) {
1026 DebuggerWithObject dbgo;
1027 dbgo.env = env;
1028 dbgo.this_obj = this_obj;
1029 dbgo.obj = list;
1030
1031 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1032 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1033 }
1034
1035 /*
1036 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1037 * Method: readBytesFromProcess0
1038 * Signature: (JJ)[B
1039 * Description: read bytes from debuggee process/core
1040 */
1041 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1042 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1043
1044 jbyteArray array = env->NewByteArray(numBytes);
1045 CHECK_EXCEPTION_(0);
1046 jboolean isCopy;
1047 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1048 CHECK_EXCEPTION_(0);
1049
1050 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1051 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1052 (psaddr_t)address, bufPtr, (size_t)numBytes);
1053
1054 if (ret != PS_OK) {
1055 // part of the class sharing workaround. try shared heap area
1056 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1057 if (classes_jsa_fd != -1 && address != (jlong)0) {
1058 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1059
1060 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1061 // walk through the shared mappings -- we just have 4 of them.
1062 // so, linear walking is okay.
1063 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
1064
1065 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1066 // and hence will be read by libproc. Besides, the file copy may be
1067 // stale because the process might have modified those pages.
1068 if (pheader->_space[m]._read_only) {
1069 jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base;
1070 size_t usedSize = pheader->_space[m]._used;
1071 if (address >= baseAddress && address < (baseAddress + usedSize)) {
1072 // the given address falls in this shared heap area
1073 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1074
1075
1076 // If more data is asked than actually mapped from file, we need to zero fill
1077 // till the end-of-page boundary. But, java array new does that for us. we just
1078 // need to read as much as data available.
1079
1080 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1081
1082 jlong diff = address - baseAddress;
1083 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1084 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1085 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1086 if (bytesRead != bytesToRead) {
1087 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1088 print_debug("shared map read failed\n");
1089 return jbyteArray(0);
1090 } else {
1091 print_debug("shared map read succeeded\n");
1092 env->ReleaseByteArrayElements(array, bufPtr, 0);
1093 return array;
1094 }
1095 } // is in current map
1096 } // is read only map
1097 } // for shared maps
1098 } // classes_jsa_fd != -1
1099 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1100 return jbyteArray(0);
1101 } else {
1102 env->ReleaseByteArrayElements(array, bufPtr, 0);
1103 return array;
1104 }
1105 }
1106
1107 /*
1108 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1109 * Method: writeBytesToProcess0
1110 * Signature: (JJ[B)V
1111 * Description: write bytes into debugger process
1112 */
1113 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1114 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1115 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1116 jboolean isCopy;
1117 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1118 CHECK_EXCEPTION;
1119
1120 if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
1121 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1122 THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
1123 }
1124
1125 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1126 }
1127
1128 /*
1129 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1130 * Method: suspend0
1131 * Signature: ()V
1132 */
1133 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1134 (JNIEnv *env, jobject this_obj) {
1135 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1136 // for now don't check return value. revisit this again.
1137 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1138 }
1139
1140 /*
1141 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1142 * Method: resume0
1143 * Signature: ()V
1144 */
1145 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1146 (JNIEnv *env, jobject this_obj) {
1147 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1148 // for now don't check return value. revisit this again.
1149 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1150 }
1151
1152 /*
1153 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1154 * Method: lookupByName0
1155 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1156 * Description: symbol lookup by name
1157 */
1158 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1159 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1160 jlong p_ps_prochandle;
1161 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1162
1163 jboolean isCopy;
1164 const char* objectName_cstr = NULL;
1165 if (objectName != NULL) {
1166 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1167 CHECK_EXCEPTION_(0);
1168 } else {
1169 objectName_cstr = PR_OBJ_EVERY;
1170 }
1171
1172 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1173 CHECK_EXCEPTION_(0);
1174
1175 psaddr_t symbol_addr = (psaddr_t) 0;
1176 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1177 symbolName_cstr, &symbol_addr);
1178
1179 if (symbol_addr == 0) {
1180 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1181 }
1182
1183 if (objectName_cstr != PR_OBJ_EVERY) {
1184 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1185 }
1186 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1187 return (jlong) (uintptr_t) symbol_addr;
1188 }
1189
1190 /*
1191 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1192 * Method: lookupByAddress0
1193 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1194 * Description: lookup symbol name for a given address
1195 */
1196 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1197 (JNIEnv *env, jobject this_obj, jlong address) {
1198 jlong p_ps_prochandle;
1199 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1200
1201 char nameBuf[SYMBOL_BUF_SIZE + 1];
1202 GElf_Sym sym;
1203 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1204 nameBuf, sizeof(nameBuf), &sym, NULL);
1205
1206 if (res != 0) { // failed
1207 return 0;
1208 }
1209
1210 jstring resSym = env->NewStringUTF(nameBuf);
1211 CHECK_EXCEPTION_(0);
1212
1213 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1214 }
1215
1216 /*
1217 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1218 * Method: demangle0
1219 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1220 */
1221 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1222 (JNIEnv *env, jobject this_object, jstring name) {
1223 jboolean isCopy;
1224 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1225 CHECK_EXCEPTION_(NULL);
1226 char buf[2*SYMBOL_BUF_SIZE + 1];
1227 jstring res = 0;
1228 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1229 res = env->NewStringUTF(buf);
1230 } else {
1231 res = name;
1232 }
1233 env->ReleaseStringUTFChars(name, ptr);
1234 return res;
1235 }
1236
1237 /*
1238 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1239 * Method: initIDs
1240 * Signature: ()V
1241 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1242 */
1243 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1244 (JNIEnv *env, jclass clazz) {
1245 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1246 if (_libsaproc_debug) {
1247 // propagate debug mode to libproc.so
1248 static const char* var = "LIBPROC_DEBUG=1";
1249 putenv((char*)var);
1250 }
1251
1252 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1253 if (libproc_handle == 0)
1254 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1255
1256 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1257 CHECK_EXCEPTION;
1258
1259 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1260 CHECK_EXCEPTION;
1261
1262 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1263 CHECK_EXCEPTION;
1264
1265 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1266 CHECK_EXCEPTION;
1267
1268 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1269 CHECK_EXCEPTION;
1270
1271 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1272 CHECK_EXCEPTION;
1273
1274 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1275 CHECK_EXCEPTION;
1276
1277 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1278 CHECK_EXCEPTION;
1279
1280 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1281 CHECK_EXCEPTION;
1282
1283 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1284 CHECK_EXCEPTION;
1285
1286 getThreadForThreadId_ID = env->GetMethodID(clazz,
1287 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1288 CHECK_EXCEPTION;
1289
1290 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1291 CHECK_EXCEPTION;
1292
1293 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1294 CHECK_EXCEPTION;
1295
1296 createSenderFrame_ID = env->GetMethodID(clazz,
1297 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1298 CHECK_EXCEPTION;
1299
1300 createLoadObject_ID = env->GetMethodID(clazz,
1301 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1302 CHECK_EXCEPTION;
1303
1304 createClosestSymbol_ID = env->GetMethodID(clazz,
1305 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1306 CHECK_EXCEPTION;
1307
1308 jclass list_clazz = env->FindClass("java/util/List");
1309 CHECK_EXCEPTION;
1310 listAdd_ID = env->GetMethodID(list_clazz, "add", "(Ljava/lang/Object;)Z");
1311 CHECK_EXCEPTION;
1312
1313 // part of the class sharing workaround
1314 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1315 CHECK_EXCEPTION;
1316 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1317 CHECK_EXCEPTION;
1318 }