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 #ifndef SOLARIS_11_B159_OR_LATER
28 #include <sys/utsname.h>
29 #endif
30 #include <thread_db.h>
31 #include <strings.h>
32 #include <limits.h>
33 #include <demangle.h>
34 #include <stdarg.h>
35 #include <stdlib.h>
36 #include <errno.h>
37
38 #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
39 #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
40 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
41 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
42
43 #define SYMBOL_BUF_SIZE 256
44 #define ERR_MSG_SIZE (PATH_MAX + 256)
45
46 // debug modes
47 static int _libsaproc_debug = 0;
48 #ifndef SOLARIS_11_B159_OR_LATER
49 static bool _Pstack_iter_debug = false;
50
51 static void dprintf_2(const char* format,...) {
52 if (_Pstack_iter_debug) {
53 va_list alist;
54
55 va_start(alist, format);
56 fputs("Pstack_iter DEBUG: ", stderr);
57 vfprintf(stderr, format, alist);
58 va_end(alist);
59 }
60 }
61 #endif // !SOLARIS_11_B159_OR_LATER
62
63 static void print_debug(const char* format,...) {
64 if (_libsaproc_debug) {
65 va_list alist;
66
67 va_start(alist, format);
68 fputs("libsaproc DEBUG: ", stderr);
69 vfprintf(stderr, format, alist);
70 va_end(alist);
71 }
72 }
73
74 struct Debugger {
75 JNIEnv* env;
76 jobject this_obj;
77 };
78
79 struct DebuggerWithObject : Debugger {
80 jobject obj;
81 };
82
83 struct DebuggerWith2Objects : DebuggerWithObject {
84 jobject obj2;
85 };
86
87 /*
88 * Portions of user thread level detail gathering code is from pstack source
89 * code. See pstack.c in Solaris 2.8 user commands source code.
90 */
91
92 static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
93 env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), errMsg);
94 }
95
96 // JNI ids for some fields, methods
97
98 // libproc handler pointer
99 static jfieldID p_ps_prochandle_ID = 0;
100
101 // libthread.so dlopen handle, thread agent ptr and function pointers
102 static jfieldID libthread_db_handle_ID = 0;
103 static jfieldID p_td_thragent_t_ID = 0;
104 static jfieldID p_td_init_ID = 0;
105 static jfieldID p_td_ta_new_ID = 0;
106 static jfieldID p_td_ta_delete_ID = 0;
107 static jfieldID p_td_ta_thr_iter_ID = 0;
108 static jfieldID p_td_thr_get_info_ID = 0;
109 static jfieldID p_td_ta_map_id2thr_ID = 0;
110 static jfieldID p_td_thr_getgregs_ID = 0;
111
112 // reg index fields
113 static jfieldID pcRegIndex_ID = 0;
114 static jfieldID fpRegIndex_ID = 0;
115
116 // part of the class sharing workaround
117 static jfieldID classes_jsa_fd_ID = 0;
118 static jfieldID p_file_map_header_ID = 0;
119
120 // method ids
121
122 static jmethodID getThreadForThreadId_ID = 0;
123 static jmethodID createSenderFrame_ID = 0;
124 static jmethodID createLoadObject_ID = 0;
125 static jmethodID createClosestSymbol_ID = 0;
126 static jmethodID listAdd_ID = 0;
127
128 /*
129 * Functions we need from libthread_db
130 */
131 typedef td_err_e
132 (*p_td_init_t)(void);
133 typedef td_err_e
134 (*p_td_ta_new_t)(void *, td_thragent_t **);
135 typedef td_err_e
136 (*p_td_ta_delete_t)(td_thragent_t *);
137 typedef td_err_e
138 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
139 td_thr_state_e, int, sigset_t *, unsigned);
140 typedef td_err_e
141 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
142 typedef td_err_e
143 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
144 typedef td_err_e
145 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
146
147 static void
148 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
149 // release libthread_db agent, if we had created
150 p_td_ta_delete_t p_td_ta_delete = 0;
151 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
152
153 td_thragent_t *p_td_thragent_t = 0;
154 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
155 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
156 p_td_ta_delete(p_td_thragent_t);
157 }
158
159 // dlclose libthread_db.so
160 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
161 if (libthread_db_handle != 0) {
162 dlclose(libthread_db_handle);
163 }
164
165 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
166 env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
167 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
168 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
169 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
170 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
171 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
172 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
173 }
174
175
176 static void detach_internal(JNIEnv* env, jobject this_obj) {
177 // clear libthread_db stuff
178 clear_libthread_db_ptrs(env, this_obj);
179
180 // release ptr to ps_prochandle
181 jlong p_ps_prochandle;
182 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
183 if (p_ps_prochandle != 0L) {
184 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
185 }
186
187 // part of the class sharing workaround
188 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
189 if (classes_jsa_fd != -1) {
190 close(classes_jsa_fd);
191 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
192 if (pheader != NULL) {
193 free(pheader);
194 }
195 }
196 }
197
198 // Is it okay to ignore libthread_db failure? Set env var to ignore
199 // libthread_db failure. You can still debug, but will miss threads
200 // related functionality.
201 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
202
203 #define HANDLE_THREADDB_FAILURE(msg) \
204 if (sa_ignore_threaddb) { \
205 printf("libsaproc WARNING: %s\n", msg); \
206 return; \
207 } else { \
208 THROW_NEW_DEBUGGER_EXCEPTION(msg); \
209 }
210
211 #define HANDLE_THREADDB_FAILURE_(msg, ret) \
212 if (sa_ignore_threaddb) { \
213 printf("libsaproc WARNING: %s\n", msg); \
214 return ret; \
215 } else { \
216 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
217 }
218
219 static const char * alt_root = NULL;
220 static int alt_root_len = -1;
221
222 #define SA_ALTROOT "SA_ALTROOT"
223
224 static void init_alt_root() {
225 if (alt_root_len == -1) {
226 alt_root = getenv(SA_ALTROOT);
227 if (alt_root)
228 alt_root_len = strlen(alt_root);
229 else
230 alt_root_len = 0;
231 }
232 }
233
234 // This function is a complete substitute for the open system call
235 // since it's also used to override open calls from libproc to
236 // implement as a pathmap style facility for the SA. If libproc
237 // starts using other interfaces then this might have to extended to
238 // cover other calls.
239 extern "C" int libsaproc_open(const char * name, int oflag, ...) {
240 if (oflag == O_RDONLY) {
241 init_alt_root();
242
243 if (_libsaproc_debug) {
244 printf("libsaproc DEBUG: libsaproc_open %s\n", name);
245 }
246
247 if (alt_root_len > 0) {
248 int fd = -1;
249 char alt_path[PATH_MAX+1];
250
251 strcpy(alt_path, alt_root);
252 strcat(alt_path, 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 if (strrchr(name, '/')) {
262 strcpy(alt_path, alt_root);
263 strcat(alt_path, strrchr(name, '/'));
264 fd = open(alt_path, O_RDONLY);
265 if (fd >= 0) {
266 if (_libsaproc_debug) {
267 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
268 }
269 return fd;
270 }
271 }
272 }
273 }
274
275 {
276 mode_t mode;
277 va_list ap;
278 va_start(ap, oflag);
279 mode = va_arg(ap, mode_t);
280 va_end(ap);
281
282 return open(name, oflag, mode);
283 }
284 }
285
286
287 static void * pathmap_dlopen(const char * name, int mode) {
288 init_alt_root();
289
290 if (_libsaproc_debug) {
291 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
292 }
293
294 void * handle = NULL;
295 if (alt_root_len > 0) {
296 char alt_path[PATH_MAX+1];
297 strcpy(alt_path, alt_root);
298 strcat(alt_path, name);
299 handle = dlopen(alt_path, mode);
300 if (_libsaproc_debug && handle) {
301 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
302 }
303
304 if (handle == NULL && strrchr(name, '/')) {
305 strcpy(alt_path, alt_root);
306 strcat(alt_path, strrchr(name, '/'));
307 handle = dlopen(alt_path, mode);
308 if (_libsaproc_debug && handle) {
309 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
310 }
311 }
312 }
313 if (handle == NULL) {
314 handle = dlopen(name, mode);
315 }
316 if (_libsaproc_debug) {
317 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%lx\n", name, (unsigned long) handle);
318 }
319 return handle;
320 }
321
322 // libproc and libthread_db callback functions
323
324 extern "C" {
325
326 static int
327 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
328 Debugger* dbg = (Debugger*) cd;
329 JNIEnv* env = dbg->env;
330 jobject this_obj = dbg->this_obj;
331 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
332
333 char *s1 = 0, *s2 = 0;
334 char libthread_db[PATH_MAX];
335
336 if (strstr(object_name, "/libthread.so.") == NULL)
337 return (0);
338
339 /*
340 * We found a libthread.
341 * dlopen() the matching libthread_db and get the thread agent handle.
342 */
343 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
344 (void) strcpy(libthread_db, object_name);
345 s1 = (char*) strstr(object_name, ".so.");
346 s2 = (char*) strstr(libthread_db, ".so.");
347 (void) strcpy(s2, "_db");
348 s2 += 3;
349 (void) strcpy(s2, s1);
350 } else {
351 #ifdef _LP64
352 /*
353 * The victim process is 32-bit, we are 64-bit.
354 * We have to find the 64-bit version of libthread_db
355 * that matches the victim's 32-bit version of libthread.
356 */
357 (void) strcpy(libthread_db, object_name);
358 s1 = (char*) strstr(object_name, "/libthread.so.");
359 s2 = (char*) strstr(libthread_db, "/libthread.so.");
360 (void) strcpy(s2, "/64");
361 s2 += 3;
362 (void) strcpy(s2, s1);
363 s1 = (char*) strstr(s1, ".so.");
364 s2 = (char*) strstr(s2, ".so.");
365 (void) strcpy(s2, "_db");
366 s2 += 3;
367 (void) strcpy(s2, s1);
368 #else
369 return (0);
370 #endif /* _LP64 */
371 }
372
373 void* libthread_db_handle = 0;
374 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
375 char errMsg[PATH_MAX + 256];
376 sprintf(errMsg, "Can't load %s!", libthread_db);
377 HANDLE_THREADDB_FAILURE_(errMsg, 0);
378 }
379 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
380
381 void* tmpPtr = 0;
382 tmpPtr = dlsym(libthread_db_handle, "td_init");
383 if (tmpPtr == 0) {
384 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
385 }
386 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
387
388 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
389 if (tmpPtr == 0) {
390 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
391 }
392 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
393
394 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
395 if (tmpPtr == 0) {
396 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
397 }
398 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
399
400 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
401 if (tmpPtr == 0) {
402 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
403 }
404 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
405
406 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
407 if (tmpPtr == 0) {
408 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
409 }
410 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
411
412 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
413 if (tmpPtr == 0) {
414 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
415 }
416 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
417
418 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
419 if (tmpPtr == 0) {
420 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
421 }
422 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
423
424 return 1;
425 }
426
427 static int
428 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
429 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
430 JNIEnv* env = dbgo->env;
431 jobject this_obj = dbgo->this_obj;
432 jobject list = dbgo->obj;
433
434 td_thrinfo_t thrinfo;
435 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);
436
437 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
438 return (0);
439
440 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
441 CHECK_EXCEPTION_(1);
442 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
443 CHECK_EXCEPTION_(1);
444 return 0;
445 }
446
447 static int
448 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
449
450 if (obj_name) {
451 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
452 JNIEnv* env = dbgo->env;
453 jobject this_obj = dbgo->this_obj;
454 jobject list = dbgo->obj;
455
456 jstring objectName = env->NewStringUTF(obj_name);
457 CHECK_EXCEPTION_(1);
458
459 jlong mapSize = (jlong) pmp->pr_size;
460 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
461 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
462 CHECK_EXCEPTION_(1);
463 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
464 CHECK_EXCEPTION_(1);
465 }
466
467 return 0;
468 }
469
470 // Pstack_iter() proc_stack_f callback prior to Nevada-B159
471 static int
472 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
473 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
474 JNIEnv* env = dbgo2->env;
475 jobject this_obj = dbgo2->this_obj;
476 jobject curFrame = dbgo2->obj2;
477
478 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
479 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
480
481 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
482 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
483
484 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
485 curFrame, pc, fp);
486 CHECK_EXCEPTION_(1);
487 if (dbgo2->obj == 0) {
488 dbgo2->obj = dbgo2->obj2;
489 }
490 return 0;
491 }
492
493 // Pstack_iter() proc_stack_f callback in Nevada-B159 or later
494 /*ARGSUSED*/
495 static int
496 wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc,
497 const long *argv, int frame_flags, int sig) {
498 return(fill_cframe_list(cd, regs, argc, argv));
499 }
500
501 // part of the class sharing workaround
502
503 // FIXME: !!HACK ALERT!!
504
505 // The format of sharing achive file header is needed to read shared heap
506 // file mappings. For now, I am hard coding portion of FileMapHeader here.
507 // Refer to filemap.hpp.
508
509 // FileMapHeader describes the shared space data in the file to be
510 // mapped. This structure gets written to a file. It is not a class, so
511 // that the compilers don't add any compiler-private data to it.
512
513 const int NUM_SHARED_MAPS = 4;
514
515 // Refer to FileMapInfo::_current_version in filemap.hpp
516 const int CURRENT_ARCHIVE_VERSION = 1;
517
518 struct FileMapHeader {
519 int _magic; // identify file type.
520 int _version; // (from enum, above.)
521 size_t _alignment; // how shared archive should be aligned
522
523
524 struct space_info {
525 int _file_offset; // sizeof(this) rounded to vm page size
526 char* _base; // copy-on-write base address
527 size_t _capacity; // for validity checking
528 size_t _used; // for setting space top on read
529
530 bool _read_only; // read only space?
531 bool _allow_exec; // executable code in space?
532
533 } _space[NUM_SHARED_MAPS];
534
535 // Ignore the rest of the FileMapHeader. We don't need those fields here.
536 };
537
538 static bool
539 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
540 jboolean i;
541 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
542 *pvalue = i;
543 return true;
544 } else {
545 return false;
546 }
547 }
548
549 static bool
550 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
551 uintptr_t uip;
552 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
553 *pvalue = uip;
554 return true;
555 } else {
556 return false;
557 }
558 }
559
560 static bool
561 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
562 char ch = ' ';
563 size_t i = 0;
564
565 while (ch != '\0') {
566 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
567 return false;
568
569 if (i < size - 1) {
570 buf[i] = ch;
571 } else { // smaller buffer
572 return false;
573 }
574
575 i++; addr++;
576 }
577
578 buf[i] = '\0';
579 return true;
580 }
581
582 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
583 // mangled symbol name for Arguments::SharedArchivePath
584 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
585
586 static int
587 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
588 Debugger* dbg = (Debugger*) cd;
589 JNIEnv* env = dbg->env;
590 jobject this_obj = dbg->this_obj;
591 const char* jvm_name = 0;
592 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
593 jvm_name = obj_name;
594 } else {
595 return 0;
596 }
597
598 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
599
600 // initialize classes.jsa file descriptor field.
601 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
602
603 // check whether class sharing is on by reading variable "UseSharedSpaces"
604 psaddr_t useSharedSpacesAddr = 0;
605 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
606 if (useSharedSpacesAddr == 0) {
607 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
608 }
609
610 // read the value of the flag "UseSharedSpaces"
611 // Since hotspot types are not available to build this library. So
612 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
613 // which is same as hotspot type "bool".
614 jboolean value = 0;
615 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
616 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
617 } else if ((int)value == 0) {
618 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
619 return 1;
620 }
621
622 char classes_jsa[PATH_MAX];
623 psaddr_t sharedArchivePathAddrAddr = 0;
624 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
625 if (sharedArchivePathAddrAddr == 0) {
626 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
627 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
628 }
629
630 uintptr_t sharedArchivePathAddr = 0;
631 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
632 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
633 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
634 }
635
636 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
637 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
638 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
639 }
640
641 print_debug("looking for %s\n", classes_jsa);
642
643 // open the classes.jsa
644 int fd = libsaproc_open(classes_jsa, O_RDONLY);
645 if (fd < 0) {
646 char errMsg[ERR_MSG_SIZE];
647 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
648 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
649 } else {
650 print_debug("opened shared archive file %s\n", classes_jsa);
651 }
652
653 // parse classes.jsa
654 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
655 if (pheader == NULL) {
656 close(fd);
657 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
658 }
659
660 memset(pheader, 0, sizeof(struct FileMapHeader));
661 // read FileMapHeader
662 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
663 if (n != sizeof(struct FileMapHeader)) {
664 char errMsg[ERR_MSG_SIZE];
665 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
666 close(fd);
667 free(pheader);
668 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
669 }
670
671 // check file magic
672 if (pheader->_magic != 0xf00baba2) {
673 char errMsg[ERR_MSG_SIZE];
674 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
675 classes_jsa, pheader->_magic);
676 close(fd);
677 free(pheader);
678 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
679 }
680
681 // check version
682 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
683 char errMsg[ERR_MSG_SIZE];
684 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
685 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
686 close(fd);
687 free(pheader);
688 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
689 }
690
691 if (_libsaproc_debug) {
692 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
693 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
694 pheader->_space[m]._file_offset, pheader->_space[m]._base,
695 pheader->_space[m]._used, pheader->_space[m]._read_only);
696 }
697 }
698
699 // FIXME: For now, omitting other checks such as VM version etc.
700
701 // store class archive file fd and map header in debugger object fields
702 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
703 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
704 return 1;
705 }
706
707 } // extern "C"
708
709 // error messages for proc_arg_grab failure codes. The messages are
710 // modified versions of comments against corresponding #defines in
711 // libproc.h.
712 static const char* proc_arg_grab_errmsgs[] = {
713 "",
714 /* G_NOPROC */ "No such process",
715 /* G_NOCORE */ "No such core file",
716 /* G_NOPROCORCORE */ "No such process or core",
717 /* G_NOEXEC */ "Cannot locate executable file",
718 /* G_ZOMB */ "Zombie processs",
719 /* G_PERM */ "No permission to attach",
720 /* G_BUSY */ "Another process has already attached",
721 /* G_SYS */ "System process - can not attach",
722 /* G_SELF */ "Process is self - can't debug myself!",
723 /* G_INTR */ "Interrupt received while grabbing",
724 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
725 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
726 /* G_ELF */ "Libelf error while parsing an ELF file",
727 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
728 };
729
730 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
731 jboolean isCopy;
732 int gcode;
733 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
734 CHECK_EXCEPTION;
735
736 // some older versions of libproc.so crash when trying to attach 32 bit
737 // debugger to 64 bit core file. check and throw error.
738 #ifndef _LP64
739 atoi(cmdLine_cstr);
740 if (errno) {
741 // core file
742 int core_fd;
743 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
744 Elf32_Ehdr e32;
745 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
746 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
747 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
748 close(core_fd);
749 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
750 }
751 close(core_fd);
752 }
753 // all other conditions are handled by libproc.so.
754 }
755 #endif
756
757 // connect to process/core
758 ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
759
760 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
761 if (! ph) {
762 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
763 char errMsg[ERR_MSG_SIZE];
764 sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
765 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
766 } else {
767 if (_libsaproc_debug && gcode == G_STRANGE) {
768 perror("libsaproc DEBUG: ");
769 }
770 if (isProcess) {
771 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
772 } else {
773 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
774 }
775 }
776 }
777
778 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
779 // support such cross-bit-debugging. check for that combination and throw error.
780 #ifdef _LP64
781 int data_model;
782 if (ps_pdmodel(ph, &data_model) != PS_OK) {
783 Prelease(ph, PRELEASE_CLEAR);
784 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
785 }
786 if (data_model == PR_MODEL_ILP32) {
787 Prelease(ph, PRELEASE_CLEAR);
788 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
789 }
790 #endif
791
792 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
793
794 Debugger dbg;
795 dbg.env = env;
796 dbg.this_obj = this_obj;
797 jthrowable exception = 0;
798 if (! isProcess) {
799 /*
800 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
801 * These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
802 * in Solaris core.To read shared heap pages, we have to read classes.jsa file.
803 */
804 Pobject_iter(ph, init_classsharing_workaround, &dbg);
805 exception = env->ExceptionOccurred();
806 if (exception) {
807 env->ExceptionClear();
808 detach_internal(env, this_obj);
809 env->Throw(exception);
810 return;
811 }
812 }
813
814 /*
815 * Iterate over the process mappings looking
816 * for libthread and then dlopen the appropriate
817 * libthread_db and get function pointers.
818 */
819 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
820 exception = env->ExceptionOccurred();
821 if (exception) {
822 env->ExceptionClear();
823 if (!sa_ignore_threaddb) {
824 detach_internal(env, this_obj);
825 env->Throw(exception);
826 }
827 return;
828 }
829
830 // init libthread_db and create thread_db agent
831 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
832 if (p_td_init == 0) {
833 if (!sa_ignore_threaddb) {
834 detach_internal(env, this_obj);
835 }
836 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
837 }
838
839 if (p_td_init() != TD_OK) {
840 if (!sa_ignore_threaddb) {
841 detach_internal(env, this_obj);
842 }
843 HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
844 }
845
846 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
847
848 td_thragent_t *p_td_thragent_t = 0;
849 if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
850 if (!sa_ignore_threaddb) {
851 detach_internal(env, this_obj);
852 }
853 HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
854 }
855 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
856
857 }
858
859 /*
860 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
861 * Method: attach0
862 * Signature: (Ljava/lang/String;)V
863 * Description: process detach
864 */
865 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
866 (JNIEnv *env, jobject this_obj, jstring pid) {
867 attach_internal(env, this_obj, pid, JNI_TRUE);
868 }
869
870 /*
871 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
872 * Method: attach0
873 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
874 * Description: core file detach
875 */
876 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
877 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
878 // ignore executable file name, libproc.so can detect a.out name anyway.
879 attach_internal(env, this_obj, corefile, JNI_FALSE);
880 }
881
882
883 /*
884 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
885 * Method: detach0
886 * Signature: ()V
887 * Description: process/core file detach
888 */
889 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
890 (JNIEnv *env, jobject this_obj) {
891 detach_internal(env, this_obj);
892 }
893
894 /*
895 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
896 * Method: getRemoteProcessAddressSize0
897 * Signature: ()I
898 * Description: get process/core address size
899 */
900 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
901 (JNIEnv *env, jobject this_obj) {
902 jlong p_ps_prochandle;
903 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
904 int data_model = PR_MODEL_ILP32;
905 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
906 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
907 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
908 }
909
910 /*
911 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
912 * Method: getPageSize0
913 * Signature: ()I
914 * Description: get process/core page size
915 */
916 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
917 (JNIEnv *env, jobject this_obj) {
918
919 /*
920 We are not yet attached to a java process or core file. getPageSize is called from
921 the constructor of ProcDebuggerLocal. The following won't work!
922
923 jlong p_ps_prochandle;
924 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
925 CHECK_EXCEPTION_(-1);
926 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
927 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
928 : getpagesize();
929
930 So even though core may have been generated with a different page size settings, for now
931 call getpagesize.
932 */
933
934 return getpagesize();
935 }
936
937 /*
938 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
939 * Method: getThreadIntegerRegisterSet0
940 * Signature: (J)[J
941 * Description: get gregset for a given thread specified by thread id
942 */
943 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
944 (JNIEnv *env, jobject this_obj, jlong tid) {
945 // map the thread id to thread handle
946 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);
947
948 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
949 if (p_td_thragent_t == 0) {
950 return 0;
951 }
952
953 td_thrhandle_t thr_handle;
954 if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
955 THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
956 }
957
958 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
959 prgregset_t gregs;
960 p_td_thr_getgregs(&thr_handle, gregs);
961
962 jlongArray res = env->NewLongArray(NPRGREG);
963 CHECK_EXCEPTION_(0);
964 jboolean isCopy;
965 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
966 for (int i = 0; i < NPRGREG; i++) {
967 ptr[i] = (jlong) (uintptr_t) gregs[i];
968 }
969 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
970 return res;
971 }
972
973 /*
974 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
975 * Method: fillThreadList0
976 * Signature: (Ljava/util/List;)V
977 * Description: fills thread list of the debuggee process/core
978 */
979 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
980 (JNIEnv *env, jobject this_obj, jobject list) {
981
982 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
983 if (p_td_thragent_t == 0) {
984 return;
985 }
986
987 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);
988
989 DebuggerWithObject dbgo;
990 dbgo.env = env;
991 dbgo.this_obj = this_obj;
992 dbgo.obj = list;
993
994 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
995 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
996 }
997
998 #ifndef SOLARIS_11_B159_OR_LATER
999 // building on Nevada-B158 or earlier so more hoops to jump through
1000 static bool has_newer_Pstack_iter = false; // older version by default
1001 #endif
1002
1003 /*
1004 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1005 * Method: fillCFrameList0
1006 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
1007 * Description: fills CFrame list for a given thread
1008 */
1009 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
1010 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
1011 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1012
1013 DebuggerWith2Objects dbgo2;
1014 dbgo2.env = env;
1015 dbgo2.this_obj = this_obj;
1016 dbgo2.obj = NULL;
1017 dbgo2.obj2 = NULL;
1018
1019 jboolean isCopy;
1020 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
1021 CHECK_EXCEPTION_(0);
1022
1023 prgregset_t gregs;
1024 for (int i = 0; i < NPRGREG; i++) {
1025 gregs[i] = (uintptr_t) ptr[i];
1026 }
1027
1028 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
1029 CHECK_EXCEPTION_(0);
1030
1031 #ifdef SOLARIS_11_B159_OR_LATER
1032 // building on Nevada-B159 or later so use the new callback
1033 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1034 wrapper_fill_cframe_list, &dbgo2);
1035 #else
1036 // building on Nevada-B158 or earlier so figure out which callback to use
1037
1038 if (has_newer_Pstack_iter) {
1039 // Since we're building on Nevada-B158 or earlier, we have to
1040 // cast wrapper_fill_cframe_list to make the compiler happy.
1041 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1042 (proc_stack_f *)wrapper_fill_cframe_list, &dbgo2);
1043 } else {
1044 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1045 fill_cframe_list, &dbgo2);
1046 }
1047 #endif // SOLARIS_11_B159_OR_LATER
1048 return dbgo2.obj;
1049 }
1050
1051 /*
1052 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1053 * Method: fillLoadObjectList0
1054 * Signature: (Ljava/util/List;)V
1055 * Description: fills shared objects of the debuggee process/core
1056 */
1057 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
1058 (JNIEnv *env, jobject this_obj, jobject list) {
1059 DebuggerWithObject dbgo;
1060 dbgo.env = env;
1061 dbgo.this_obj = this_obj;
1062 dbgo.obj = list;
1063
1064 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1065 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1066 }
1067
1068 /*
1069 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1070 * Method: readBytesFromProcess0
1071 * Signature: (JJ)[B
1072 * Description: read bytes from debuggee process/core
1073 */
1074 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1075 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1076
1077 jbyteArray array = env->NewByteArray(numBytes);
1078 CHECK_EXCEPTION_(0);
1079 jboolean isCopy;
1080 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1081 CHECK_EXCEPTION_(0);
1082
1083 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1084 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1085 (psaddr_t)address, bufPtr, (size_t)numBytes);
1086
1087 if (ret != PS_OK) {
1088 // part of the class sharing workaround. try shared heap area
1089 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1090 if (classes_jsa_fd != -1 && address != (jlong)0) {
1091 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1092
1093 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1094 // walk through the shared mappings -- we just have 4 of them.
1095 // so, linear walking is okay.
1096 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
1097
1098 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1099 // and hence will be read by libproc. Besides, the file copy may be
1100 // stale because the process might have modified those pages.
1101 if (pheader->_space[m]._read_only) {
1102 jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base;
1103 size_t usedSize = pheader->_space[m]._used;
1104 if (address >= baseAddress && address < (baseAddress + usedSize)) {
1105 // the given address falls in this shared heap area
1106 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1107
1108
1109 // If more data is asked than actually mapped from file, we need to zero fill
1110 // till the end-of-page boundary. But, java array new does that for us. we just
1111 // need to read as much as data available.
1112
1113 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1114
1115 jlong diff = address - baseAddress;
1116 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1117 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1118 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1119 if (bytesRead != bytesToRead) {
1120 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1121 print_debug("shared map read failed\n");
1122 return jbyteArray(0);
1123 } else {
1124 print_debug("shared map read succeeded\n");
1125 env->ReleaseByteArrayElements(array, bufPtr, 0);
1126 return array;
1127 }
1128 } // is in current map
1129 } // is read only map
1130 } // for shared maps
1131 } // classes_jsa_fd != -1
1132 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1133 return jbyteArray(0);
1134 } else {
1135 env->ReleaseByteArrayElements(array, bufPtr, 0);
1136 return array;
1137 }
1138 }
1139
1140 /*
1141 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1142 * Method: writeBytesToProcess0
1143 * Signature: (JJ[B)V
1144 * Description: write bytes into debugger process
1145 */
1146 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1147 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1148 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1149 jboolean isCopy;
1150 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1151 CHECK_EXCEPTION;
1152
1153 if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
1154 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1155 THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
1156 }
1157
1158 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1159 }
1160
1161 /*
1162 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1163 * Method: suspend0
1164 * Signature: ()V
1165 */
1166 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1167 (JNIEnv *env, jobject this_obj) {
1168 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1169 // for now don't check return value. revisit this again.
1170 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1171 }
1172
1173 /*
1174 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1175 * Method: resume0
1176 * Signature: ()V
1177 */
1178 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1179 (JNIEnv *env, jobject this_obj) {
1180 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1181 // for now don't check return value. revisit this again.
1182 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1183 }
1184
1185 /*
1186 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1187 * Method: lookupByName0
1188 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1189 * Description: symbol lookup by name
1190 */
1191 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1192 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1193 jlong p_ps_prochandle;
1194 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1195
1196 jboolean isCopy;
1197 const char* objectName_cstr = NULL;
1198 if (objectName != NULL) {
1199 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1200 CHECK_EXCEPTION_(0);
1201 } else {
1202 objectName_cstr = PR_OBJ_EVERY;
1203 }
1204
1205 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1206 CHECK_EXCEPTION_(0);
1207
1208 psaddr_t symbol_addr = (psaddr_t) 0;
1209 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1210 symbolName_cstr, &symbol_addr);
1211
1212 if (symbol_addr == 0) {
1213 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1214 }
1215
1216 if (objectName_cstr != PR_OBJ_EVERY) {
1217 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1218 }
1219 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1220 return (jlong) (uintptr_t) symbol_addr;
1221 }
1222
1223 /*
1224 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1225 * Method: lookupByAddress0
1226 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1227 * Description: lookup symbol name for a given address
1228 */
1229 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1230 (JNIEnv *env, jobject this_obj, jlong address) {
1231 jlong p_ps_prochandle;
1232 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1233
1234 char nameBuf[SYMBOL_BUF_SIZE + 1];
1235 GElf_Sym sym;
1236 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1237 nameBuf, sizeof(nameBuf), &sym, NULL);
1238
1239 if (res != 0) { // failed
1240 return 0;
1241 }
1242
1243 jstring resSym = env->NewStringUTF(nameBuf);
1244 CHECK_EXCEPTION_(0);
1245
1246 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1247 }
1248
1249 /*
1250 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1251 * Method: demangle0
1252 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1253 */
1254 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1255 (JNIEnv *env, jobject this_object, jstring name) {
1256 jboolean isCopy;
1257 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1258 char buf[2*SYMBOL_BUF_SIZE + 1];
1259 jstring res = 0;
1260 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1261 res = env->NewStringUTF(buf);
1262 } else {
1263 res = name;
1264 }
1265 env->ReleaseStringUTFChars(name, ptr);
1266 return res;
1267 }
1268
1269 #ifndef SOLARIS_11_B159_OR_LATER
1270 // Determine if the OS we're running on has the newer version
1271 // of libproc's Pstack_iter.
1272 //
1273 // Set env var PSTACK_ITER_DEBUG=true to debug this logic.
1274 // Set env var PSTACK_ITER_DEBUG_RELEASE to simulate a 'release' value.
1275 // Set env var PSTACK_ITER_DEBUG_VERSION to simulate a 'version' value.
1276 //
1277 // frankenputer 'uname -r -v': 5.10 Generic_141445-09
1278 // jurassic 'uname -r -v': 5.11 snv_164
1279 // lonepeak 'uname -r -v': 5.11 snv_127
1280 //
1281 static void set_has_newer_Pstack_iter(JNIEnv *env) {
1282 static bool done_set = false;
1283
1284 if (done_set) {
1285 // already set has_newer_Pstack_iter
1286 return;
1287 }
1288
1289 struct utsname name;
1290 if (uname(&name) == -1) {
1291 THROW_NEW_DEBUGGER_EXCEPTION("uname() failed!");
1292 }
1293 dprintf_2("release='%s' version='%s'\n", name.release, name.version);
1294
1295 if (_Pstack_iter_debug) {
1296 char *override = getenv("PSTACK_ITER_DEBUG_RELEASE");
1297 if (override != NULL) {
1298 strncpy(name.release, override, SYS_NMLN - 1);
1299 name.release[SYS_NMLN - 2] = '\0';
1300 dprintf_2("overriding with release='%s'\n", name.release);
1301 }
1302 override = getenv("PSTACK_ITER_DEBUG_VERSION");
1303 if (override != NULL) {
1304 strncpy(name.version, override, SYS_NMLN - 1);
1305 name.version[SYS_NMLN - 2] = '\0';
1306 dprintf_2("overriding with version='%s'\n", name.version);
1307 }
1308 }
1309
1310 // the major number corresponds to the old SunOS major number
1311 int major = atoi(name.release);
1312 if (major >= 6) {
1313 dprintf_2("release is SunOS 6 or later\n");
1314 has_newer_Pstack_iter = true;
1315 done_set = true;
1316 return;
1317 }
1318 if (major < 5) {
1319 dprintf_2("release is SunOS 4 or earlier\n");
1320 done_set = true;
1321 return;
1322 }
1323
1324 // some SunOS 5.* build so now check for Solaris versions
1325 char *dot = strchr(name.release, '.');
1326 int minor = 0;
1327 if (dot != NULL) {
1328 // release is major.minor format
1329 *dot = NULL;
1330 minor = atoi(dot + 1);
1331 }
1332
1333 if (minor <= 10) {
1334 dprintf_2("release is Solaris 10 or earlier\n");
1335 done_set = true;
1336 return;
1337 } else if (minor >= 12) {
1338 dprintf_2("release is Solaris 12 or later\n");
1339 has_newer_Pstack_iter = true;
1340 done_set = true;
1341 return;
1342 }
1343
1344 // some Solaris 11 build so now check for internal build numbers
1345 if (strncmp(name.version, "snv_", 4) != 0) {
1346 dprintf_2("release is Solaris 11 post-GA or later\n");
1347 has_newer_Pstack_iter = true;
1348 done_set = true;
1349 return;
1350 }
1351
1352 // version begins with "snv_" so a pre-GA build of Solaris 11
1353 int build = atoi(&name.version[4]);
1354 if (build >= 159) {
1355 dprintf_2("release is Nevada-B159 or later\n");
1356 has_newer_Pstack_iter = true;
1357 } else {
1358 dprintf_2("release is Nevada-B158 or earlier\n");
1359 }
1360
1361 done_set = true;
1362 }
1363 #endif // !SOLARIS_11_B159_OR_LATER
1364
1365 /*
1366 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1367 * Method: initIDs
1368 * Signature: ()V
1369 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1370 */
1371 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1372 (JNIEnv *env, jclass clazz) {
1373 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1374 if (_libsaproc_debug) {
1375 // propagate debug mode to libproc.so
1376 static const char* var = "LIBPROC_DEBUG=1";
1377 putenv((char*)var);
1378 }
1379
1380 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1381 if (libproc_handle == 0)
1382 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1383
1384 #ifndef SOLARIS_11_B159_OR_LATER
1385 _Pstack_iter_debug = getenv("PSTACK_ITER_DEBUG") != NULL;
1386
1387 set_has_newer_Pstack_iter(env);
1388 CHECK_EXCEPTION;
1389 dprintf_2("has_newer_Pstack_iter=%d\n", has_newer_Pstack_iter);
1390 #endif
1391
1392 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1393 CHECK_EXCEPTION;
1394
1395 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1396 CHECK_EXCEPTION;
1397
1398 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1399 CHECK_EXCEPTION;
1400
1401 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1402 CHECK_EXCEPTION;
1403
1404 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1405 CHECK_EXCEPTION;
1406
1407 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1408 CHECK_EXCEPTION;
1409
1410 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1411 CHECK_EXCEPTION;
1412
1413 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1414 CHECK_EXCEPTION;
1415
1416 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1417 CHECK_EXCEPTION;
1418
1419 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1420 CHECK_EXCEPTION;
1421
1422 getThreadForThreadId_ID = env->GetMethodID(clazz,
1423 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1424 CHECK_EXCEPTION;
1425
1426 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1427 CHECK_EXCEPTION;
1428
1429 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1430 CHECK_EXCEPTION;
1431
1432 createSenderFrame_ID = env->GetMethodID(clazz,
1433 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1434 CHECK_EXCEPTION;
1435
1436 createLoadObject_ID = env->GetMethodID(clazz,
1437 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1438 CHECK_EXCEPTION;
1439
1440 createClosestSymbol_ID = env->GetMethodID(clazz,
1441 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1442 CHECK_EXCEPTION;
1443
1444 listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z");
1445 CHECK_EXCEPTION;
1446
1447 // part of the class sharing workaround
1448 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1449 CHECK_EXCEPTION;
1450 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1451 CHECK_EXCEPTION;
1452 }