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