Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: agent/src/os/solaris/proc/saproc.cpp

agent/src/os/solaris/proc/saproc.cpp

changeset 435
a61af66fc99e
child 964
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equal deleted inserted replaced
-1:000000000000 435:a61af66fc99e
1 /*
2 * Copyright 2002-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any 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 mode
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 static int find_file_hook(const char * name, int elf_checksum) {
218 init_alt_root();
219
220 if (_libsaproc_debug) {
221 printf("libsaproc DEBUG: find_file_hook %s 0x%x\n", name, elf_checksum);
222 }
223
224 if (alt_root_len > 0) {
225 int fd = -1;
226 char alt_path[PATH_MAX+1];
227
228 strcpy(alt_path, alt_root);
229 strcat(alt_path, name);
230 fd = open(alt_path, O_RDONLY);
231 if (fd >= 0) {
232 if (_libsaproc_debug) {
233 printf("libsaproc DEBUG: find_file_hook substituted %s\n", alt_path);
234 }
235 return fd;
236 }
237
238 if (strrchr(name, '/')) {
239 strcpy(alt_path, alt_root);
240 strcat(alt_path, strrchr(name, '/'));
241 fd = open(alt_path, O_RDONLY);
242 if (fd >= 0) {
243 if (_libsaproc_debug) {
244 printf("libsaproc DEBUG: find_file_hook substituted %s\n", alt_path);
245 }
246 return fd;
247 }
248 }
249 }
250 return -1;
251 }
252
253 static int pathmap_open(const char* name) {
254 int fd = open(name, O_RDONLY);
255 if (fd < 0) {
256 fd = find_file_hook(name, 0);
257 }
258 return fd;
259 }
260
261 static void * pathmap_dlopen(const char * name, int mode) {
262 init_alt_root();
263
264 if (_libsaproc_debug) {
265 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
266 }
267
268 void * handle = NULL;
269 if (alt_root_len > 0) {
270 char alt_path[PATH_MAX+1];
271 strcpy(alt_path, alt_root);
272 strcat(alt_path, name);
273 handle = dlopen(alt_path, mode);
274 if (_libsaproc_debug && handle) {
275 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
276 }
277
278 if (handle == NULL && strrchr(name, '/')) {
279 strcpy(alt_path, alt_root);
280 strcat(alt_path, strrchr(name, '/'));
281 handle = dlopen(alt_path, mode);
282 if (_libsaproc_debug && handle) {
283 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
284 }
285 }
286 }
287 if (handle == NULL) {
288 handle = dlopen(name, mode);
289 }
290 if (_libsaproc_debug) {
291 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%x\n", name, handle);
292 }
293 return handle;
294 }
295
296 // libproc and libthread_db callback functions
297
298 extern "C" {
299
300 static int
301 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
302 Debugger* dbg = (Debugger*) cd;
303 JNIEnv* env = dbg->env;
304 jobject this_obj = dbg->this_obj;
305 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
306
307 char *s1 = 0, *s2 = 0;
308 char libthread_db[PATH_MAX];
309
310 if (strstr(object_name, "/libthread.so.") == NULL)
311 return (0);
312
313 /*
314 * We found a libthread.
315 * dlopen() the matching libthread_db and get the thread agent handle.
316 */
317 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
318 (void) strcpy(libthread_db, object_name);
319 s1 = (char*) strstr(object_name, ".so.");
320 s2 = (char*) strstr(libthread_db, ".so.");
321 (void) strcpy(s2, "_db");
322 s2 += 3;
323 (void) strcpy(s2, s1);
324 } else {
325 #ifdef _LP64
326 /*
327 * The victim process is 32-bit, we are 64-bit.
328 * We have to find the 64-bit version of libthread_db
329 * that matches the victim's 32-bit version of libthread.
330 */
331 (void) strcpy(libthread_db, object_name);
332 s1 = (char*) strstr(object_name, "/libthread.so.");
333 s2 = (char*) strstr(libthread_db, "/libthread.so.");
334 (void) strcpy(s2, "/64");
335 s2 += 3;
336 (void) strcpy(s2, s1);
337 s1 = (char*) strstr(s1, ".so.");
338 s2 = (char*) strstr(s2, ".so.");
339 (void) strcpy(s2, "_db");
340 s2 += 3;
341 (void) strcpy(s2, s1);
342 #else
343 return (0);
344 #endif /* _LP64 */
345 }
346
347 void* libthread_db_handle = 0;
348 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
349 char errMsg[PATH_MAX + 256];
350 sprintf(errMsg, "Can't load %s!", libthread_db);
351 HANDLE_THREADDB_FAILURE_(errMsg, 0);
352 }
353 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
354
355 void* tmpPtr = 0;
356 tmpPtr = dlsym(libthread_db_handle, "td_init");
357 if (tmpPtr == 0) {
358 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
359 }
360 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
361
362 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
363 if (tmpPtr == 0) {
364 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
365 }
366 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
367
368 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
369 if (tmpPtr == 0) {
370 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
371 }
372 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
373
374 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
375 if (tmpPtr == 0) {
376 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
377 }
378 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
379
380 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
381 if (tmpPtr == 0) {
382 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
383 }
384 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
385
386 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
387 if (tmpPtr == 0) {
388 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
389 }
390 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
391
392 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
393 if (tmpPtr == 0) {
394 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
395 }
396 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
397
398 return 1;
399 }
400
401 static int
402 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
403 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
404 JNIEnv* env = dbgo->env;
405 jobject this_obj = dbgo->this_obj;
406 jobject list = dbgo->obj;
407
408 td_thrinfo_t thrinfo;
409 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);
410
411 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
412 return (0);
413
414 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
415 CHECK_EXCEPTION_(1);
416 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
417 CHECK_EXCEPTION_(1);
418 return 0;
419 }
420
421 static int
422 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
423
424 if (obj_name) {
425 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
426 JNIEnv* env = dbgo->env;
427 jobject this_obj = dbgo->this_obj;
428 jobject list = dbgo->obj;
429
430 jstring objectName = env->NewStringUTF(obj_name);
431 CHECK_EXCEPTION_(1);
432
433 jlong mapSize = (jlong) pmp->pr_size;
434 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
435 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
436 CHECK_EXCEPTION_(1);
437 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
438 CHECK_EXCEPTION_(1);
439 }
440
441 return 0;
442 }
443
444 static int
445 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
446 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
447 JNIEnv* env = dbgo2->env;
448 jobject this_obj = dbgo2->this_obj;
449 jobject curFrame = dbgo2->obj2;
450
451 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
452 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
453
454 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
455 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
456
457 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
458 curFrame, pc, fp);
459 CHECK_EXCEPTION_(1);
460 if (dbgo2->obj == 0) {
461 dbgo2->obj = dbgo2->obj2;
462 }
463 return 0;
464 }
465
466 // part of the class sharing workaround
467
468 // FIXME: !!HACK ALERT!!
469
470 // The format of sharing achive file header is needed to read shared heap
471 // file mappings. For now, I am hard coding portion of FileMapHeader here.
472 // Refer to filemap.hpp.
473
474 // FileMapHeader describes the shared space data in the file to be
475 // mapped. This structure gets written to a file. It is not a class, so
476 // that the compilers don't add any compiler-private data to it.
477
478 // Refer to CompactingPermGenGen::n_regions in compactingPermGenGen.hpp
479 const int NUM_SHARED_MAPS = 4;
480
481 // Refer to FileMapInfo::_current_version in filemap.hpp
482 const int CURRENT_ARCHIVE_VERSION = 1;
483
484 struct FileMapHeader {
485 int _magic; // identify file type.
486 int _version; // (from enum, above.)
487 size_t _alignment; // how shared archive should be aligned
488
489
490 struct space_info {
491 int _file_offset; // sizeof(this) rounded to vm page size
492 char* _base; // copy-on-write base address
493 size_t _capacity; // for validity checking
494 size_t _used; // for setting space top on read
495
496 bool _read_only; // read only space?
497 bool _allow_exec; // executable code in space?
498
499 } _space[NUM_SHARED_MAPS]; // was _space[CompactingPermGenGen::n_regions];
500
501 // Ignore the rest of the FileMapHeader. We don't need those fields here.
502 };
503
504 static bool
505 read_int(struct ps_prochandle* ph, psaddr_t addr, int* pvalue) {
506 int i;
507 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
508 *pvalue = i;
509 return true;
510 } else {
511 return false;
512 }
513 }
514
515 static bool
516 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
517 uintptr_t uip;
518 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
519 *pvalue = uip;
520 return true;
521 } else {
522 return false;
523 }
524 }
525
526 static bool
527 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
528 char ch = ' ';
529 size_t i = 0;
530
531 while (ch != '\0') {
532 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
533 return false;
534
535 if (i < size - 1) {
536 buf[i] = ch;
537 } else { // smaller buffer
538 return false;
539 }
540
541 i++; addr++;
542 }
543
544 buf[i] = '\0';
545 return true;
546 }
547
548 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
549 // mangled symbol name for Arguments::SharedArchivePath
550 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
551
552 static int
553 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
554 Debugger* dbg = (Debugger*) cd;
555 JNIEnv* env = dbg->env;
556 jobject this_obj = dbg->this_obj;
557 const char* jvm_name = 0;
558 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL ||
559 (jvm_name = strstr(obj_name, "libjvm_g.so")) != NULL) {
560 jvm_name = obj_name;
561 } else {
562 return 0;
563 }
564
565 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
566
567 // initialize classes[_g].jsa file descriptor field.
568 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
569
570 // check whether class sharing is on by reading variable "UseSharedSpaces"
571 psaddr_t useSharedSpacesAddr = 0;
572 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
573 if (useSharedSpacesAddr == 0) {
574 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
575 }
576
577 // read the value of the flag "UseSharedSpaces"
578 int value = 0;
579 if (read_int(ph, useSharedSpacesAddr, &value) != true) {
580 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
581 } else if (value == 0) {
582 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
583 return 1;
584 }
585
586 char classes_jsa[PATH_MAX];
587 psaddr_t sharedArchivePathAddrAddr = 0;
588 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
589 if (sharedArchivePathAddrAddr == 0) {
590 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
591 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
592 }
593
594 uintptr_t sharedArchivePathAddr = 0;
595 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
596 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
597 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
598 }
599
600 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
601 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
602 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
603 }
604
605 print_debug("looking for %s\n", classes_jsa);
606
607 // open the classes[_g].jsa
608 int fd = pathmap_open(classes_jsa);
609 if (fd < 0) {
610 char errMsg[ERR_MSG_SIZE];
611 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
612 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
613 } else {
614 print_debug("opened shared archive file %s\n", classes_jsa);
615 }
616
617 // parse classes[_g].jsa
618 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
619 if (pheader == NULL) {
620 close(fd);
621 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
622 }
623
624 memset(pheader, 0, sizeof(struct FileMapHeader));
625 // read FileMapHeader
626 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
627 if (n != sizeof(struct FileMapHeader)) {
628 free(pheader);
629 close(fd);
630 char errMsg[ERR_MSG_SIZE];
631 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
632 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
633 }
634
635 // check file magic
636 if (pheader->_magic != 0xf00baba2) {
637 free(pheader);
638 close(fd);
639 char errMsg[ERR_MSG_SIZE];
640 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
641 classes_jsa, pheader->_magic);
642 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
643 }
644
645 // check version
646 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
647 free(pheader);
648 close(fd);
649 char errMsg[ERR_MSG_SIZE];
650 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
651 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
652 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
653 }
654
655 if (_libsaproc_debug) {
656 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
657 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
658 pheader->_space[m]._file_offset, pheader->_space[m]._base,
659 pheader->_space[m]._used, pheader->_space[m]._read_only);
660 }
661 }
662
663 // FIXME: For now, omitting other checks such as VM version etc.
664
665 // store class archive file fd and map header in debugger object fields
666 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
667 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
668 return 1;
669 }
670
671 } // extern "C"
672
673 // error messages for proc_arg_grab failure codes. The messages are
674 // modified versions of comments against corresponding #defines in
675 // libproc.h.
676 static const char* proc_arg_grab_errmsgs[] = {
677 "",
678 /* G_NOPROC */ "No such process",
679 /* G_NOCORE */ "No such core file",
680 /* G_NOPROCORCORE */ "No such process or core",
681 /* G_NOEXEC */ "Cannot locate executable file",
682 /* G_ZOMB */ "Zombie processs",
683 /* G_PERM */ "No permission to attach",
684 /* G_BUSY */ "Another process has already attached",
685 /* G_SYS */ "System process - can not attach",
686 /* G_SELF */ "Process is self - can't debug myself!",
687 /* G_INTR */ "Interrupt received while grabbing",
688 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
689 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
690 /* G_ELF */ "Libelf error while parsing an ELF file",
691 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
692 };
693
694 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
695 jboolean isCopy;
696 int gcode;
697 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
698 CHECK_EXCEPTION;
699
700 // some older versions of libproc.so crash when trying to attach 32 bit
701 // debugger to 64 bit core file. check and throw error.
702 #ifndef _LP64
703 atoi(cmdLine_cstr);
704 if (errno) {
705 // core file
706 int core_fd;
707 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
708 Elf32_Ehdr e32;
709 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
710 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
711 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
712 close(core_fd);
713 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
714 }
715 close(core_fd);
716 }
717 // all other conditions are handled by libproc.so.
718 }
719 #endif
720
721 // connect to process/core
722 struct ps_prochandle* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode);
723 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
724 if (! ph) {
725 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
726 char errMsg[ERR_MSG_SIZE];
727 sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
728 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
729 } else {
730 if (_libsaproc_debug && gcode == G_STRANGE) {
731 perror("libsaproc DEBUG: ");
732 }
733 if (isProcess) {
734 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
735 } else {
736 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
737 }
738 }
739 }
740
741 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
742 // support such cross-bit-debugging. check for that combination and throw error.
743 #ifdef _LP64
744 int data_model;
745 if (ps_pdmodel(ph, &data_model) != PS_OK) {
746 Prelease(ph, PRELEASE_CLEAR);
747 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
748 }
749 if (data_model == PR_MODEL_ILP32) {
750 Prelease(ph, PRELEASE_CLEAR);
751 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
752 }
753 #endif
754
755 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
756
757 Debugger dbg;
758 dbg.env = env;
759 dbg.this_obj = this_obj;
760 jthrowable exception = 0;
761 if (! isProcess) {
762 /*
763 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
764 * These pages are mapped from the file "classes[_g].jsa". MAP_SHARED pages are not dumped
765 * in Solaris core.To read shared heap pages, we have to read classes[_g].jsa file.
766 */
767 Pobject_iter(ph, init_classsharing_workaround, &dbg);
768 exception = env->ExceptionOccurred();
769 if (exception) {
770 env->ExceptionClear();
771 detach_internal(env, this_obj);
772 env->Throw(exception);
773 return;
774 }
775 }
776
777 /*
778 * Iterate over the process mappings looking
779 * for libthread and then dlopen the appropriate
780 * libthread_db and get function pointers.
781 */
782 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
783 exception = env->ExceptionOccurred();
784 if (exception) {
785 env->ExceptionClear();
786 if (!sa_ignore_threaddb) {
787 detach_internal(env, this_obj);
788 env->Throw(exception);
789 }
790 return;
791 }
792
793 // init libthread_db and create thread_db agent
794 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
795 if (p_td_init == 0) {
796 if (!sa_ignore_threaddb) {
797 detach_internal(env, this_obj);
798 }
799 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
800 }
801
802 if (p_td_init() != TD_OK) {
803 if (!sa_ignore_threaddb) {
804 detach_internal(env, this_obj);
805 }
806 HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
807 }
808
809 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
810
811 td_thragent_t *p_td_thragent_t = 0;
812 if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
813 if (!sa_ignore_threaddb) {
814 detach_internal(env, this_obj);
815 }
816 HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
817 }
818 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
819
820 }
821
822 /*
823 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
824 * Method: attach0
825 * Signature: (Ljava/lang/String;)V
826 * Description: process detach
827 */
828 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
829 (JNIEnv *env, jobject this_obj, jstring pid) {
830 attach_internal(env, this_obj, pid, JNI_TRUE);
831 }
832
833 /*
834 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
835 * Method: attach0
836 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
837 * Description: core file detach
838 */
839 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
840 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
841 // ignore executable file name, libproc.so can detect a.out name anyway.
842 attach_internal(env, this_obj, corefile, JNI_FALSE);
843 }
844
845
846 /*
847 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
848 * Method: detach0
849 * Signature: ()V
850 * Description: process/core file detach
851 */
852 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
853 (JNIEnv *env, jobject this_obj) {
854 detach_internal(env, this_obj);
855 }
856
857 /*
858 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
859 * Method: getRemoteProcessAddressSize0
860 * Signature: ()I
861 * Description: get process/core address size
862 */
863 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
864 (JNIEnv *env, jobject this_obj) {
865 jlong p_ps_prochandle;
866 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
867 int data_model = PR_MODEL_ILP32;
868 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
869 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
870 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
871 }
872
873 /*
874 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
875 * Method: getPageSize0
876 * Signature: ()I
877 * Description: get process/core page size
878 */
879 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
880 (JNIEnv *env, jobject this_obj) {
881
882 /*
883 We are not yet attached to a java process or core file. getPageSize is called from
884 the constructor of ProcDebuggerLocal. The following won't work!
885
886 jlong p_ps_prochandle;
887 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
888 CHECK_EXCEPTION_(-1);
889 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
890 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
891 : getpagesize();
892
893 So even though core may have been generated with a different page size settings, for now
894 call getpagesize.
895 */
896
897 return getpagesize();
898 }
899
900 /*
901 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
902 * Method: getThreadIntegerRegisterSet0
903 * Signature: (J)[J
904 * Description: get gregset for a given thread specified by thread id
905 */
906 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
907 (JNIEnv *env, jobject this_obj, jlong tid) {
908 // map the thread id to thread handle
909 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);
910
911 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
912 if (p_td_thragent_t == 0) {
913 return 0;
914 }
915
916 td_thrhandle_t thr_handle;
917 if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
918 THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
919 }
920
921 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
922 prgregset_t gregs;
923 p_td_thr_getgregs(&thr_handle, gregs);
924
925 jlongArray res = env->NewLongArray(NPRGREG);
926 CHECK_EXCEPTION_(0);
927 jboolean isCopy;
928 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
929 for (int i = 0; i < NPRGREG; i++) {
930 ptr[i] = (jlong) (uintptr_t) gregs[i];
931 }
932 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
933 return res;
934 }
935
936 /*
937 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
938 * Method: fillThreadList0
939 * Signature: (Ljava/util/List;)V
940 * Description: fills thread list of the debuggee process/core
941 */
942 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
943 (JNIEnv *env, jobject this_obj, jobject list) {
944
945 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
946 if (p_td_thragent_t == 0) {
947 return;
948 }
949
950 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);
951
952 DebuggerWithObject dbgo;
953 dbgo.env = env;
954 dbgo.this_obj = this_obj;
955 dbgo.obj = list;
956
957 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
958 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
959 }
960
961 /*
962 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
963 * Method: fillCFrameList0
964 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
965 * Description: fills CFrame list for a given thread
966 */
967 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
968 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
969 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
970
971 DebuggerWith2Objects dbgo2;
972 dbgo2.env = env;
973 dbgo2.this_obj = this_obj;
974 dbgo2.obj = NULL;
975 dbgo2.obj2 = NULL;
976
977 jboolean isCopy;
978 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
979 CHECK_EXCEPTION_(0);
980
981 prgregset_t gregs;
982 for (int i = 0; i < NPRGREG; i++) {
983 gregs[i] = (uintptr_t) ptr[i];
984 }
985
986 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
987 CHECK_EXCEPTION_(0);
988 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, fill_cframe_list, &dbgo2);
989 return dbgo2.obj;
990 }
991
992 /*
993 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
994 * Method: fillLoadObjectList0
995 * Signature: (Ljava/util/List;)V
996 * Description: fills shared objects of the debuggee process/core
997 */
998 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
999 (JNIEnv *env, jobject this_obj, jobject list) {
1000 DebuggerWithObject dbgo;
1001 dbgo.env = env;
1002 dbgo.this_obj = this_obj;
1003 dbgo.obj = list;
1004
1005 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1006 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1007 }
1008
1009 /*
1010 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1011 * Method: readBytesFromProcess0
1012 * Signature: (JJ)[B
1013 * Description: read bytes from debuggee process/core
1014 */
1015 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1016 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1017
1018 jbyteArray array = env->NewByteArray(numBytes);
1019 CHECK_EXCEPTION_(0);
1020 jboolean isCopy;
1021 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1022 CHECK_EXCEPTION_(0);
1023
1024 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1025 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1026 (psaddr_t)address, bufPtr, (size_t)numBytes);
1027
1028 if (ret != PS_OK) {
1029 // part of the class sharing workaround. try shared heap area
1030 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1031 if (classes_jsa_fd != -1 && address != (jlong)0) {
1032 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1033
1034 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1035 // walk through the shared mappings -- we just have 4 of them.
1036 // so, linear walking is okay.
1037 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
1038
1039 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1040 // and hence will be read by libproc. Besides, the file copy may be
1041 // stale because the process might have modified those pages.
1042 if (pheader->_space[m]._read_only) {
1043 jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base;
1044 size_t usedSize = pheader->_space[m]._used;
1045 if (address >= baseAddress && address < (baseAddress + usedSize)) {
1046 // the given address falls in this shared heap area
1047 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1048
1049
1050 // If more data is asked than actually mapped from file, we need to zero fill
1051 // till the end-of-page boundary. But, java array new does that for us. we just
1052 // need to read as much as data available.
1053
1054 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1055
1056 jlong diff = address - baseAddress;
1057 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1058 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1059 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1060 if (bytesRead != bytesToRead) {
1061 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1062 print_debug("shared map read failed\n");
1063 return jbyteArray(0);
1064 } else {
1065 print_debug("shared map read succeeded\n");
1066 env->ReleaseByteArrayElements(array, bufPtr, 0);
1067 return array;
1068 }
1069 } // is in current map
1070 } // is read only map
1071 } // for shared maps
1072 } // classes_jsa_fd != -1
1073 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1074 return jbyteArray(0);
1075 } else {
1076 env->ReleaseByteArrayElements(array, bufPtr, 0);
1077 return array;
1078 }
1079 }
1080
1081 /*
1082 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1083 * Method: writeBytesToProcess0
1084 * Signature: (JJ[B)V
1085 * Description: write bytes into debugger process
1086 */
1087 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1088 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1089 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1090 jboolean isCopy;
1091 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1092 CHECK_EXCEPTION;
1093
1094 if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
1095 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1096 THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
1097 }
1098
1099 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1100 }
1101
1102 /*
1103 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1104 * Method: suspend0
1105 * Signature: ()V
1106 */
1107 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1108 (JNIEnv *env, jobject this_obj) {
1109 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1110 // for now don't check return value. revisit this again.
1111 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1112 }
1113
1114 /*
1115 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1116 * Method: resume0
1117 * Signature: ()V
1118 */
1119 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1120 (JNIEnv *env, jobject this_obj) {
1121 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1122 // for now don't check return value. revisit this again.
1123 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1124 }
1125
1126 /*
1127 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1128 * Method: lookupByName0
1129 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1130 * Description: symbol lookup by name
1131 */
1132 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1133 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1134 jlong p_ps_prochandle;
1135 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1136
1137 jboolean isCopy;
1138 const char* objectName_cstr = NULL;
1139 if (objectName != NULL) {
1140 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1141 CHECK_EXCEPTION_(0);
1142 } else {
1143 objectName_cstr = PR_OBJ_EVERY;
1144 }
1145
1146 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1147 CHECK_EXCEPTION_(0);
1148
1149 psaddr_t symbol_addr = (psaddr_t) 0;
1150 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1151 symbolName_cstr, &symbol_addr);
1152
1153 if (symbol_addr == 0) {
1154 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1155 }
1156
1157 if (objectName_cstr != PR_OBJ_EVERY) {
1158 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1159 }
1160 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1161 return (jlong) (uintptr_t) symbol_addr;
1162 }
1163
1164 /*
1165 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1166 * Method: lookupByAddress0
1167 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1168 * Description: lookup symbol name for a given address
1169 */
1170 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1171 (JNIEnv *env, jobject this_obj, jlong address) {
1172 jlong p_ps_prochandle;
1173 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1174
1175 char nameBuf[SYMBOL_BUF_SIZE + 1];
1176 GElf_Sym sym;
1177 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1178 nameBuf, sizeof(nameBuf), &sym);
1179 if (res != 0) { // failed
1180 return 0;
1181 }
1182
1183 jstring resSym = env->NewStringUTF(nameBuf);
1184 CHECK_EXCEPTION_(0);
1185
1186 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1187 }
1188
1189 /*
1190 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1191 * Method: demangle0
1192 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1193 */
1194 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1195 (JNIEnv *env, jobject this_object, jstring name) {
1196 jboolean isCopy;
1197 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1198 char buf[2*SYMBOL_BUF_SIZE + 1];
1199 jstring res = 0;
1200 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1201 res = env->NewStringUTF(buf);
1202 } else {
1203 res = name;
1204 }
1205 env->ReleaseStringUTFChars(name, ptr);
1206 return res;
1207 }
1208
1209 typedef int (*find_file_hook_t)(const char *, int elf_checksum);
1210
1211 /*
1212 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1213 * Method: initIDs
1214 * Signature: ()V
1215 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1216 */
1217 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1218 (JNIEnv *env, jclass clazz) {
1219 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1220 if (_libsaproc_debug) {
1221 // propagate debug mode to libproc.so
1222 static const char* var = "LIBPROC_DEBUG=1";
1223 putenv((char*)var);
1224 }
1225
1226 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1227 if (libproc_handle == 0)
1228 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1229
1230 // If possible, set shared object find file hook.
1231 void (*set_hook)(find_file_hook_t) = (void(*)(find_file_hook_t))dlsym(libproc_handle, "Pset_find_file_hook");
1232 if (set_hook) {
1233 // we found find file hook symbol, set up our hook function.
1234 set_hook(find_file_hook);
1235 } else if (getenv(SA_ALTROOT)) {
1236 printf("libsaproc WARNING: %s set, but can't set file hook. " \
1237 "Did you use right version of libproc.so?\n", SA_ALTROOT);
1238 }
1239
1240 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1241 CHECK_EXCEPTION;
1242
1243 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1244 CHECK_EXCEPTION;
1245
1246 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1247 CHECK_EXCEPTION;
1248
1249 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1250 CHECK_EXCEPTION;
1251
1252 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1253 CHECK_EXCEPTION;
1254
1255 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1256 CHECK_EXCEPTION;
1257
1258 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1259 CHECK_EXCEPTION;
1260
1261 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1262 CHECK_EXCEPTION;
1263
1264 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1265 CHECK_EXCEPTION;
1266
1267 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1268 CHECK_EXCEPTION;
1269
1270 getThreadForThreadId_ID = env->GetMethodID(clazz,
1271 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1272 CHECK_EXCEPTION;
1273
1274 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1275 CHECK_EXCEPTION;
1276
1277 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1278 CHECK_EXCEPTION;
1279
1280 createSenderFrame_ID = env->GetMethodID(clazz,
1281 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1282 CHECK_EXCEPTION;
1283
1284 createLoadObject_ID = env->GetMethodID(clazz,
1285 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1286 CHECK_EXCEPTION;
1287
1288 createClosestSymbol_ID = env->GetMethodID(clazz,
1289 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1290 CHECK_EXCEPTION;
1291
1292 listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z");
1293 CHECK_EXCEPTION;
1294
1295 // part of the class sharing workaround
1296 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1297 CHECK_EXCEPTION;
1298 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1299 CHECK_EXCEPTION;
1300 }

Mercurial Repository: jdk8-mips64-public/hotspot

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