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