1 /*
2 * Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "salibproc.h"
26 #include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h"
27 #include <thread_db.h>
28 #include <strings.h>
29 #include <limits.h>
30 #include <demangle.h>
31 #include <stdarg.h>
32 #include <stdlib.h>
33 #include <errno.h>
34
35 #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
36 #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
37 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
38 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
39
40 #define SYMBOL_BUF_SIZE 256
41 #define ERR_MSG_SIZE (PATH_MAX + 256)
42
43 // debug modes
44 static int _libsaproc_debug = 0;
45
46 static void print_debug(const char* format,...) {
47 if (_libsaproc_debug) {
48 va_list alist;
49
50 va_start(alist, format);
51 fputs("libsaproc DEBUG: ", stderr);
52 vfprintf(stderr, format, alist);
53 va_end(alist);
54 }
55 }
56
57 struct Debugger {
58 JNIEnv* env;
59 jobject this_obj;
60 };
61
62 struct DebuggerWithObject : Debugger {
63 jobject obj;
64 };
65
66 struct DebuggerWith2Objects : DebuggerWithObject {
67 jobject obj2;
68 };
69
70 /*
71 * Portions of user thread level detail gathering code is from pstack source
72 * code. See pstack.c in Solaris 2.8 user commands source code.
73 */
74
75 static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
76 env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), errMsg);
77 }
78
79 // JNI ids for some fields, methods
80
81 // libproc handler pointer
82 static jfieldID p_ps_prochandle_ID = 0;
83
84 // libthread.so dlopen handle, thread agent ptr and function pointers
85 static jfieldID libthread_db_handle_ID = 0;
86 static jfieldID p_td_thragent_t_ID = 0;
87 static jfieldID p_td_init_ID = 0;
88 static jfieldID p_td_ta_new_ID = 0;
89 static jfieldID p_td_ta_delete_ID = 0;
90 static jfieldID p_td_ta_thr_iter_ID = 0;
91 static jfieldID p_td_thr_get_info_ID = 0;
92 static jfieldID p_td_ta_map_id2thr_ID = 0;
93 static jfieldID p_td_thr_getgregs_ID = 0;
94
95 // reg index fields
96 static jfieldID pcRegIndex_ID = 0;
97 static jfieldID fpRegIndex_ID = 0;
98
99 // part of the class sharing workaround
100 static jfieldID classes_jsa_fd_ID = 0;
101 static jfieldID p_file_map_header_ID = 0;
102
103 // method ids
104
105 static jmethodID getThreadForThreadId_ID = 0;
106 static jmethodID createSenderFrame_ID = 0;
107 static jmethodID createLoadObject_ID = 0;
108 static jmethodID createClosestSymbol_ID = 0;
109 static jmethodID listAdd_ID = 0;
110
111 /*
112 * Functions we need from libthread_db
113 */
114 typedef td_err_e
115 (*p_td_init_t)(void);
116 typedef td_err_e
117 (*p_td_ta_new_t)(void *, td_thragent_t **);
118 typedef td_err_e
119 (*p_td_ta_delete_t)(td_thragent_t *);
120 typedef td_err_e
121 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
122 td_thr_state_e, int, sigset_t *, unsigned);
123 typedef td_err_e
124 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
125 typedef td_err_e
126 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
127 typedef td_err_e
128 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
129
130 static void
131 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
132 // release libthread_db agent, if we had created
133 p_td_ta_delete_t p_td_ta_delete = 0;
134 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
135
136 td_thragent_t *p_td_thragent_t = 0;
137 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
138 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
139 p_td_ta_delete(p_td_thragent_t);
140 }
141
142 // dlclose libthread_db.so
143 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
144 if (libthread_db_handle != 0) {
145 dlclose(libthread_db_handle);
146 }
147
148 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
149 env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
150 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
151 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
152 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
153 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
154 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
155 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
156 }
157
158
159 static void detach_internal(JNIEnv* env, jobject this_obj) {
160 // clear libthread_db stuff
161 clear_libthread_db_ptrs(env, this_obj);
162
163 // release ptr to ps_prochandle
164 jlong p_ps_prochandle;
165 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
166 if (p_ps_prochandle != 0L) {
167 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
168 }
169
170 // part of the class sharing workaround
171 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
172 if (classes_jsa_fd != -1) {
173 close(classes_jsa_fd);
174 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
175 if (pheader != NULL) {
176 free(pheader);
177 }
178 }
179 }
180
181 // Is it okay to ignore libthread_db failure? Set env var to ignore
182 // libthread_db failure. You can still debug, but will miss threads
183 // related functionality.
184 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
185
186 #define HANDLE_THREADDB_FAILURE(msg) \
187 if (sa_ignore_threaddb) { \
188 printf("libsaproc WARNING: %s\n", msg); \
189 return; \
190 } else { \
191 THROW_NEW_DEBUGGER_EXCEPTION(msg); \
192 }
193
194 #define HANDLE_THREADDB_FAILURE_(msg, ret) \
195 if (sa_ignore_threaddb) { \
196 printf("libsaproc WARNING: %s\n", msg); \
197 return ret; \
198 } else { \
199 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
200 }
201
202 static const char * alt_root = NULL;
203 static int alt_root_len = -1;
204
205 #define SA_ALTROOT "SA_ALTROOT"
206
207 static void init_alt_root() {
208 if (alt_root_len == -1) {
209 alt_root = getenv(SA_ALTROOT);
210 if (alt_root)
211 alt_root_len = strlen(alt_root);
212 else
213 alt_root_len = 0;
214 }
215 }
216
217 // This function is a complete substitute for the open system call
218 // since it's also used to override open calls from libproc to
219 // implement as a pathmap style facility for the SA. If libproc
220 // starts using other interfaces then this might have to extended to
221 // cover other calls.
222 extern "C" int libsaproc_open(const char * name, int oflag, ...) {
223 if (oflag == O_RDONLY) {
224 init_alt_root();
225
226 if (_libsaproc_debug) {
227 printf("libsaproc DEBUG: libsaproc_open %s\n", name);
228 }
229
230 if (alt_root_len > 0) {
231 int fd = -1;
232 char alt_path[PATH_MAX+1];
233
234 strcpy(alt_path, alt_root);
235 strcat(alt_path, name);
236 fd = open(alt_path, O_RDONLY);
237 if (fd >= 0) {
238 if (_libsaproc_debug) {
239 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
240 }
241 return fd;
242 }
243
244 if (strrchr(name, '/')) {
245 strcpy(alt_path, alt_root);
246 strcat(alt_path, strrchr(name, '/'));
247 fd = open(alt_path, O_RDONLY);
248 if (fd >= 0) {
249 if (_libsaproc_debug) {
250 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
251 }
252 return fd;
253 }
254 }
255 }
256 }
257
258 {
259 mode_t mode;
260 va_list ap;
261 va_start(ap, oflag);
262 mode = va_arg(ap, mode_t);
263 va_end(ap);
264
265 return open(name, oflag, mode);
266 }
267 }
268
269
270 static void * pathmap_dlopen(const char * name, int mode) {
271 init_alt_root();
272
273 if (_libsaproc_debug) {
274 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
275 }
276
277 void * handle = NULL;
278 if (alt_root_len > 0) {
279 char alt_path[PATH_MAX+1];
280 strcpy(alt_path, alt_root);
281 strcat(alt_path, name);
282 handle = dlopen(alt_path, mode);
283 if (_libsaproc_debug && handle) {
284 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
285 }
286
287 if (handle == NULL && strrchr(name, '/')) {
288 strcpy(alt_path, alt_root);
289 strcat(alt_path, strrchr(name, '/'));
290 handle = dlopen(alt_path, mode);
291 if (_libsaproc_debug && handle) {
292 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
293 }
294 }
295 }
296 if (handle == NULL) {
297 handle = dlopen(name, mode);
298 }
299 if (_libsaproc_debug) {
300 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%lx\n", name, (unsigned long) handle);
301 }
302 return handle;
303 }
304
305 // libproc and libthread_db callback functions
306
307 extern "C" {
308
309 static int
310 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
311 Debugger* dbg = (Debugger*) cd;
312 JNIEnv* env = dbg->env;
313 jobject this_obj = dbg->this_obj;
314 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
315
316 char *s1 = 0, *s2 = 0;
317 char libthread_db[PATH_MAX];
318
319 if (strstr(object_name, "/libthread.so.") == NULL)
320 return (0);
321
322 /*
323 * We found a libthread.
324 * dlopen() the matching libthread_db and get the thread agent handle.
325 */
326 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
327 (void) strcpy(libthread_db, object_name);
328 s1 = (char*) strstr(object_name, ".so.");
329 s2 = (char*) strstr(libthread_db, ".so.");
330 (void) strcpy(s2, "_db");
331 s2 += 3;
332 (void) strcpy(s2, s1);
333 } else {
334 #ifdef _LP64
335 /*
336 * The victim process is 32-bit, we are 64-bit.
337 * We have to find the 64-bit version of libthread_db
338 * that matches the victim's 32-bit version of libthread.
339 */
340 (void) strcpy(libthread_db, object_name);
341 s1 = (char*) strstr(object_name, "/libthread.so.");
342 s2 = (char*) strstr(libthread_db, "/libthread.so.");
343 (void) strcpy(s2, "/64");
344 s2 += 3;
345 (void) strcpy(s2, s1);
346 s1 = (char*) strstr(s1, ".so.");
347 s2 = (char*) strstr(s2, ".so.");
348 (void) strcpy(s2, "_db");
349 s2 += 3;
350 (void) strcpy(s2, s1);
351 #else
352 return (0);
353 #endif /* _LP64 */
354 }
355
356 void* libthread_db_handle = 0;
357 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
358 char errMsg[PATH_MAX + 256];
359 sprintf(errMsg, "Can't load %s!", libthread_db);
360 HANDLE_THREADDB_FAILURE_(errMsg, 0);
361 }
362 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
363
364 void* tmpPtr = 0;
365 tmpPtr = dlsym(libthread_db_handle, "td_init");
366 if (tmpPtr == 0) {
367 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
368 }
369 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
370
371 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
372 if (tmpPtr == 0) {
373 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
374 }
375 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
376
377 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
378 if (tmpPtr == 0) {
379 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
380 }
381 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
382
383 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
384 if (tmpPtr == 0) {
385 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
386 }
387 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
388
389 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
390 if (tmpPtr == 0) {
391 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
392 }
393 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
394
395 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
396 if (tmpPtr == 0) {
397 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
398 }
399 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
400
401 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
402 if (tmpPtr == 0) {
403 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
404 }
405 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
406
407 return 1;
408 }
409
410 static int
411 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
412 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
413 JNIEnv* env = dbgo->env;
414 jobject this_obj = dbgo->this_obj;
415 jobject list = dbgo->obj;
416
417 td_thrinfo_t thrinfo;
418 p_td_thr_get_info_t p_td_thr_get_info = (p_td_thr_get_info_t) env->GetLongField(this_obj, p_td_thr_get_info_ID);
419
420 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
421 return (0);
422
423 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
424 CHECK_EXCEPTION_(1);
425 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
426 CHECK_EXCEPTION_(1);
427 return 0;
428 }
429
430 static int
431 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
432
433 if (obj_name) {
434 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
435 JNIEnv* env = dbgo->env;
436 jobject this_obj = dbgo->this_obj;
437 jobject list = dbgo->obj;
438
439 jstring objectName = env->NewStringUTF(obj_name);
440 CHECK_EXCEPTION_(1);
441
442 jlong mapSize = (jlong) pmp->pr_size;
443 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
444 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
445 CHECK_EXCEPTION_(1);
446 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
447 CHECK_EXCEPTION_(1);
448 }
449
450 return 0;
451 }
452
453 static int
454 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
455 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
456 JNIEnv* env = dbgo2->env;
457 jobject this_obj = dbgo2->this_obj;
458 jobject curFrame = dbgo2->obj2;
459
460 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
461 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
462
463 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
464 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
465
466 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
467 curFrame, pc, fp);
468 CHECK_EXCEPTION_(1);
469 if (dbgo2->obj == 0) {
470 dbgo2->obj = dbgo2->obj2;
471 }
472 return 0;
473 }
474
475 // part of the class sharing workaround
476
477 // FIXME: !!HACK ALERT!!
478
479 // The format of sharing achive file header is needed to read shared heap
480 // file mappings. For now, I am hard coding portion of FileMapHeader here.
481 // Refer to filemap.hpp.
482
483 // FileMapHeader describes the shared space data in the file to be
484 // mapped. This structure gets written to a file. It is not a class, so
485 // that the compilers don't add any compiler-private data to it.
486
487 const int NUM_SHARED_MAPS = 4;
488
489 // Refer to FileMapInfo::_current_version in filemap.hpp
490 const int CURRENT_ARCHIVE_VERSION = 1;
491
492 struct FileMapHeader {
493 int _magic; // identify file type.
494 int _version; // (from enum, above.)
495 size_t _alignment; // how shared archive should be aligned
496
497
498 struct space_info {
499 int _file_offset; // sizeof(this) rounded to vm page size
500 char* _base; // copy-on-write base address
501 size_t _capacity; // for validity checking
502 size_t _used; // for setting space top on read
503
504 bool _read_only; // read only space?
505 bool _allow_exec; // executable code in space?
506
507 } _space[NUM_SHARED_MAPS];
508
509 // Ignore the rest of the FileMapHeader. We don't need those fields here.
510 };
511
512 static bool
513 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
514 jboolean i;
515 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
516 *pvalue = i;
517 return true;
518 } else {
519 return false;
520 }
521 }
522
523 static bool
524 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
525 uintptr_t uip;
526 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
527 *pvalue = uip;
528 return true;
529 } else {
530 return false;
531 }
532 }
533
534 static bool
535 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
536 char ch = ' ';
537 size_t i = 0;
538
539 while (ch != '\0') {
540 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
541 return false;
542
543 if (i < size - 1) {
544 buf[i] = ch;
545 } else { // smaller buffer
546 return false;
547 }
548
549 i++; addr++;
550 }
551
552 buf[i] = '\0';
553 return true;
554 }
555
556 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
557 // mangled symbol name for Arguments::SharedArchivePath
558 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
559
560 static int
561 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
562 Debugger* dbg = (Debugger*) cd;
563 JNIEnv* env = dbg->env;
564 jobject this_obj = dbg->this_obj;
565 const char* jvm_name = 0;
566 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
567 jvm_name = obj_name;
568 } else {
569 return 0;
570 }
571
572 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
573
574 // initialize classes.jsa file descriptor field.
575 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
576
577 // check whether class sharing is on by reading variable "UseSharedSpaces"
578 psaddr_t useSharedSpacesAddr = 0;
579 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
580 if (useSharedSpacesAddr == 0) {
581 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
582 }
583
584 // read the value of the flag "UseSharedSpaces"
585 // Since hotspot types are not available to build this library. So
586 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
587 // which is same as hotspot type "bool".
588 jboolean value = 0;
589 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
590 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
591 } else if ((int)value == 0) {
592 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
593 return 1;
594 }
595
596 char classes_jsa[PATH_MAX];
597 psaddr_t sharedArchivePathAddrAddr = 0;
598 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
599 if (sharedArchivePathAddrAddr == 0) {
600 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
601 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
602 }
603
604 uintptr_t sharedArchivePathAddr = 0;
605 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
606 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
607 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
608 }
609
610 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
611 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
612 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
613 }
614
615 print_debug("looking for %s\n", classes_jsa);
616
617 // open the classes.jsa
618 int fd = libsaproc_open(classes_jsa, O_RDONLY);
619 if (fd < 0) {
620 char errMsg[ERR_MSG_SIZE];
621 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
622 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
623 } else {
624 print_debug("opened shared archive file %s\n", classes_jsa);
625 }
626
627 // parse classes.jsa
628 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
629 if (pheader == NULL) {
630 close(fd);
631 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
632 }
633
634 memset(pheader, 0, sizeof(struct FileMapHeader));
635 // read FileMapHeader
636 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
637 if (n != sizeof(struct FileMapHeader)) {
638 char errMsg[ERR_MSG_SIZE];
639 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
640 close(fd);
641 free(pheader);
642 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
643 }
644
645 // check file magic
646 if (pheader->_magic != 0xf00baba2) {
647 char errMsg[ERR_MSG_SIZE];
648 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
649 classes_jsa, pheader->_magic);
650 close(fd);
651 free(pheader);
652 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
653 }
654
655 // check version
656 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
657 char errMsg[ERR_MSG_SIZE];
658 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
659 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
660 close(fd);
661 free(pheader);
662 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
663 }
664
665 if (_libsaproc_debug) {
666 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
667 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
668 pheader->_space[m]._file_offset, pheader->_space[m]._base,
669 pheader->_space[m]._used, pheader->_space[m]._read_only);
670 }
671 }
672
673 // FIXME: For now, omitting other checks such as VM version etc.
674
675 // store class archive file fd and map header in debugger object fields
676 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
677 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
678 return 1;
679 }
680
681 } // extern "C"
682
683 // error messages for proc_arg_grab failure codes. The messages are
684 // modified versions of comments against corresponding #defines in
685 // libproc.h.
686 static const char* proc_arg_grab_errmsgs[] = {
687 "",
688 /* G_NOPROC */ "No such process",
689 /* G_NOCORE */ "No such core file",
690 /* G_NOPROCORCORE */ "No such process or core",
691 /* G_NOEXEC */ "Cannot locate executable file",
692 /* G_ZOMB */ "Zombie processs",
693 /* G_PERM */ "No permission to attach",
694 /* G_BUSY */ "Another process has already attached",
695 /* G_SYS */ "System process - can not attach",
696 /* G_SELF */ "Process is self - can't debug myself!",
697 /* G_INTR */ "Interrupt received while grabbing",
698 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
699 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
700 /* G_ELF */ "Libelf error while parsing an ELF file",
701 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
702 };
703
704 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
705 jboolean isCopy;
706 int gcode;
707 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
708 CHECK_EXCEPTION;
709
710 // some older versions of libproc.so crash when trying to attach 32 bit
711 // debugger to 64 bit core file. check and throw error.
712 #ifndef _LP64
713 atoi(cmdLine_cstr);
714 if (errno) {
715 // core file
716 int core_fd;
717 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
718 Elf32_Ehdr e32;
719 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
720 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
721 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
722 close(core_fd);
723 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
724 }
725 close(core_fd);
726 }
727 // all other conditions are handled by libproc.so.
728 }
729 #endif
730
731 // connect to process/core
732 ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
733
734 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
735 if (! ph) {
736 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
737 char errMsg[ERR_MSG_SIZE];
738 sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
739 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
740 } else {
741 if (_libsaproc_debug && gcode == G_STRANGE) {
742 perror("libsaproc DEBUG: ");
743 }
744 if (isProcess) {
745 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
746 } else {
747 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
748 }
749 }
750 }
751
752 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
753 // support such cross-bit-debugging. check for that combination and throw error.
754 #ifdef _LP64
755 int data_model;
756 if (ps_pdmodel(ph, &data_model) != PS_OK) {
757 Prelease(ph, PRELEASE_CLEAR);
758 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
759 }
760 if (data_model == PR_MODEL_ILP32) {
761 Prelease(ph, PRELEASE_CLEAR);
762 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
763 }
764 #endif
765
766 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
767
768 Debugger dbg;
769 dbg.env = env;
770 dbg.this_obj = this_obj;
771 jthrowable exception = 0;
772 if (! isProcess) {
773 /*
774 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
775 * These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
776 * in Solaris core.To read shared heap pages, we have to read classes.jsa file.
777 */
778 Pobject_iter(ph, init_classsharing_workaround, &dbg);
779 exception = env->ExceptionOccurred();
780 if (exception) {
781 env->ExceptionClear();
782 detach_internal(env, this_obj);
783 env->Throw(exception);
784 return;
785 }
786 }
787
788 /*
789 * Iterate over the process mappings looking
790 * for libthread and then dlopen the appropriate
791 * libthread_db and get function pointers.
792 */
793 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
794 exception = env->ExceptionOccurred();
795 if (exception) {
796 env->ExceptionClear();
797 if (!sa_ignore_threaddb) {
798 detach_internal(env, this_obj);
799 env->Throw(exception);
800 }
801 return;
802 }
803
804 // init libthread_db and create thread_db agent
805 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
806 if (p_td_init == 0) {
807 if (!sa_ignore_threaddb) {
808 detach_internal(env, this_obj);
809 }
810 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
811 }
812
813 if (p_td_init() != TD_OK) {
814 if (!sa_ignore_threaddb) {
815 detach_internal(env, this_obj);
816 }
817 HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
818 }
819
820 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
821
822 td_thragent_t *p_td_thragent_t = 0;
823 if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
824 if (!sa_ignore_threaddb) {
825 detach_internal(env, this_obj);
826 }
827 HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
828 }
829 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
830
831 }
832
833 /*
834 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
835 * Method: attach0
836 * Signature: (Ljava/lang/String;)V
837 * Description: process detach
838 */
839 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
840 (JNIEnv *env, jobject this_obj, jstring pid) {
841 attach_internal(env, this_obj, pid, JNI_TRUE);
842 }
843
844 /*
845 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
846 * Method: attach0
847 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
848 * Description: core file detach
849 */
850 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
851 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
852 // ignore executable file name, libproc.so can detect a.out name anyway.
853 attach_internal(env, this_obj, corefile, JNI_FALSE);
854 }
855
856
857 /*
858 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
859 * Method: detach0
860 * Signature: ()V
861 * Description: process/core file detach
862 */
863 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
864 (JNIEnv *env, jobject this_obj) {
865 detach_internal(env, this_obj);
866 }
867
868 /*
869 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
870 * Method: getRemoteProcessAddressSize0
871 * Signature: ()I
872 * Description: get process/core address size
873 */
874 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
875 (JNIEnv *env, jobject this_obj) {
876 jlong p_ps_prochandle;
877 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
878 int data_model = PR_MODEL_ILP32;
879 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
880 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
881 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
882 }
883
884 /*
885 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
886 * Method: getPageSize0
887 * Signature: ()I
888 * Description: get process/core page size
889 */
890 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
891 (JNIEnv *env, jobject this_obj) {
892
893 /*
894 We are not yet attached to a java process or core file. getPageSize is called from
895 the constructor of ProcDebuggerLocal. The following won't work!
896
897 jlong p_ps_prochandle;
898 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
899 CHECK_EXCEPTION_(-1);
900 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
901 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
902 : getpagesize();
903
904 So even though core may have been generated with a different page size settings, for now
905 call getpagesize.
906 */
907
908 return getpagesize();
909 }
910
911 /*
912 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
913 * Method: getThreadIntegerRegisterSet0
914 * Signature: (J)[J
915 * Description: get gregset for a given thread specified by thread id
916 */
917 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
918 (JNIEnv *env, jobject this_obj, jlong tid) {
919 // map the thread id to thread handle
920 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);
921
922 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
923 if (p_td_thragent_t == 0) {
924 return 0;
925 }
926
927 td_thrhandle_t thr_handle;
928 if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
929 THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
930 }
931
932 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
933 prgregset_t gregs;
934 p_td_thr_getgregs(&thr_handle, gregs);
935
936 jlongArray res = env->NewLongArray(NPRGREG);
937 CHECK_EXCEPTION_(0);
938 jboolean isCopy;
939 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
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 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 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1048 // walk through the shared mappings -- we just have 4 of them.
1049 // so, linear walking is okay.
1050 for (int m = 0; m < NUM_SHARED_MAPS; 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]._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 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1103 jboolean isCopy;
1104 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1105 CHECK_EXCEPTION;
1106
1107 if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
1108 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1109 THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
1110 }
1111
1112 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1113 }
1114
1115 /*
1116 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1117 * Method: suspend0
1118 * Signature: ()V
1119 */
1120 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1121 (JNIEnv *env, jobject this_obj) {
1122 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1123 // for now don't check return value. revisit this again.
1124 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1125 }
1126
1127 /*
1128 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1129 * Method: resume0
1130 * Signature: ()V
1131 */
1132 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1133 (JNIEnv *env, jobject this_obj) {
1134 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1135 // for now don't check return value. revisit this again.
1136 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1137 }
1138
1139 /*
1140 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1141 * Method: lookupByName0
1142 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1143 * Description: symbol lookup by name
1144 */
1145 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1146 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1147 jlong p_ps_prochandle;
1148 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1149
1150 jboolean isCopy;
1151 const char* objectName_cstr = NULL;
1152 if (objectName != NULL) {
1153 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1154 CHECK_EXCEPTION_(0);
1155 } else {
1156 objectName_cstr = PR_OBJ_EVERY;
1157 }
1158
1159 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1160 CHECK_EXCEPTION_(0);
1161
1162 psaddr_t symbol_addr = (psaddr_t) 0;
1163 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1164 symbolName_cstr, &symbol_addr);
1165
1166 if (symbol_addr == 0) {
1167 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1168 }
1169
1170 if (objectName_cstr != PR_OBJ_EVERY) {
1171 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1172 }
1173 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1174 return (jlong) (uintptr_t) symbol_addr;
1175 }
1176
1177 /*
1178 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1179 * Method: lookupByAddress0
1180 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1181 * Description: lookup symbol name for a given address
1182 */
1183 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1184 (JNIEnv *env, jobject this_obj, jlong address) {
1185 jlong p_ps_prochandle;
1186 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1187
1188 char nameBuf[SYMBOL_BUF_SIZE + 1];
1189 GElf_Sym sym;
1190 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1191 nameBuf, sizeof(nameBuf), &sym, NULL);
1192 if (res != 0) { // failed
1193 return 0;
1194 }
1195
1196 jstring resSym = env->NewStringUTF(nameBuf);
1197 CHECK_EXCEPTION_(0);
1198
1199 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1200 }
1201
1202 /*
1203 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1204 * Method: demangle0
1205 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1206 */
1207 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1208 (JNIEnv *env, jobject this_object, jstring name) {
1209 jboolean isCopy;
1210 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1211 char buf[2*SYMBOL_BUF_SIZE + 1];
1212 jstring res = 0;
1213 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1214 res = env->NewStringUTF(buf);
1215 } else {
1216 res = name;
1217 }
1218 env->ReleaseStringUTFChars(name, ptr);
1219 return res;
1220 }
1221
1222 /*
1223 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1224 * Method: initIDs
1225 * Signature: ()V
1226 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1227 */
1228 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1229 (JNIEnv *env, jclass clazz) {
1230 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1231 if (_libsaproc_debug) {
1232 // propagate debug mode to libproc.so
1233 static const char* var = "LIBPROC_DEBUG=1";
1234 putenv((char*)var);
1235 }
1236
1237 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1238 if (libproc_handle == 0)
1239 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1240
1241 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1242 CHECK_EXCEPTION;
1243
1244 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1245 CHECK_EXCEPTION;
1246
1247 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1248 CHECK_EXCEPTION;
1249
1250 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1251 CHECK_EXCEPTION;
1252
1253 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1254 CHECK_EXCEPTION;
1255
1256 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1257 CHECK_EXCEPTION;
1258
1259 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1260 CHECK_EXCEPTION;
1261
1262 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1263 CHECK_EXCEPTION;
1264
1265 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1266 CHECK_EXCEPTION;
1267
1268 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1269 CHECK_EXCEPTION;
1270
1271 getThreadForThreadId_ID = env->GetMethodID(clazz,
1272 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1273 CHECK_EXCEPTION;
1274
1275 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1276 CHECK_EXCEPTION;
1277
1278 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1279 CHECK_EXCEPTION;
1280
1281 createSenderFrame_ID = env->GetMethodID(clazz,
1282 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1283 CHECK_EXCEPTION;
1284
1285 createLoadObject_ID = env->GetMethodID(clazz,
1286 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1287 CHECK_EXCEPTION;
1288
1289 createClosestSymbol_ID = env->GetMethodID(clazz,
1290 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1291 CHECK_EXCEPTION;
1292
1293 listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z");
1294 CHECK_EXCEPTION;
1295
1296 // part of the class sharing workaround
1297 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1298 CHECK_EXCEPTION;
1299 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1300 CHECK_EXCEPTION;
1301 }