1 /*
2 * Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "salibproc.h"
26 #include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h"
27 #include <thread_db.h>
28 #include <strings.h>
29 #include <limits.h>
30 #include <demangle.h>
31 #include <stdarg.h>
32 #include <stdlib.h>
33 #include <errno.h>
34 #include "cds.h"
35
36 #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
37 #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
38 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
39 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
40
41 #define SYMBOL_BUF_SIZE 256
42 #define ERR_MSG_SIZE (PATH_MAX + 256)
43
44 // debug modes
45 static int _libsaproc_debug = 0;
46
47 static void print_debug(const char* format,...) {
48 if (_libsaproc_debug) {
49 va_list alist;
50
51 va_start(alist, format);
52 fputs("libsaproc DEBUG: ", stderr);
53 vfprintf(stderr, format, alist);
54 va_end(alist);
55 }
56 }
57
58 struct Debugger {
59 JNIEnv* env;
60 jobject this_obj;
61 };
62
63 struct DebuggerWithObject : Debugger {
64 jobject obj;
65 };
66
67 struct DebuggerWith2Objects : DebuggerWithObject {
68 jobject obj2;
69 };
70
71 /*
72 * Portions of user thread level detail gathering code is from pstack source
73 * code. See pstack.c in Solaris 2.8 user commands source code.
74 */
75
76 static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
77 jclass clazz = env->FindClass("sun/jvm/hotspot/debugger/DebuggerException");
78 CHECK_EXCEPTION;
79 env->ThrowNew(clazz, errMsg);
80 }
81
82 // JNI ids for some fields, methods
83
84 // libproc handler pointer
85 static jfieldID p_ps_prochandle_ID = 0;
86
87 // libthread.so dlopen handle, thread agent ptr and function pointers
88 static jfieldID libthread_db_handle_ID = 0;
89 static jfieldID p_td_thragent_t_ID = 0;
90 static jfieldID p_td_init_ID = 0;
91 static jfieldID p_td_ta_new_ID = 0;
92 static jfieldID p_td_ta_delete_ID = 0;
93 static jfieldID p_td_ta_thr_iter_ID = 0;
94 static jfieldID p_td_thr_get_info_ID = 0;
95 static jfieldID p_td_ta_map_id2thr_ID = 0;
96 static jfieldID p_td_thr_getgregs_ID = 0;
97
98 // reg index fields
99 static jfieldID pcRegIndex_ID = 0;
100 static jfieldID fpRegIndex_ID = 0;
101
102 // part of the class sharing workaround
103 static jfieldID classes_jsa_fd_ID = 0;
104 static jfieldID p_file_map_header_ID = 0;
105
106 // method ids
107
108 static jmethodID getThreadForThreadId_ID = 0;
109 static jmethodID createSenderFrame_ID = 0;
110 static jmethodID createLoadObject_ID = 0;
111 static jmethodID createClosestSymbol_ID = 0;
112 static jmethodID listAdd_ID = 0;
113
114 /*
115 * Functions we need from libthread_db
116 */
117 typedef td_err_e
118 (*p_td_init_t)(void);
119 typedef td_err_e
120 (*p_td_ta_new_t)(void *, td_thragent_t **);
121 typedef td_err_e
122 (*p_td_ta_delete_t)(td_thragent_t *);
123 typedef td_err_e
124 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
125 td_thr_state_e, int, sigset_t *, unsigned);
126 typedef td_err_e
127 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
128 typedef td_err_e
129 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
130 typedef td_err_e
131 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
132
133 static void
134 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
135 // release libthread_db agent, if we had created
136 p_td_ta_delete_t p_td_ta_delete = 0;
137 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
138
139 td_thragent_t *p_td_thragent_t = 0;
140 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
141 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
142 p_td_ta_delete(p_td_thragent_t);
143 }
144
145 // dlclose libthread_db.so
146 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
147 if (libthread_db_handle != 0) {
148 dlclose(libthread_db_handle);
149 }
150
151 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
152 env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
153 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
154 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
155 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
156 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
157 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
158 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
159 }
160
161
162 static void detach_internal(JNIEnv* env, jobject this_obj) {
163 // clear libthread_db stuff
164 clear_libthread_db_ptrs(env, this_obj);
165
166 // release ptr to ps_prochandle
167 jlong p_ps_prochandle;
168 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
169 if (p_ps_prochandle != 0L) {
170 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
171 }
172
173 // part of the class sharing workaround
174 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
175 if (classes_jsa_fd != -1) {
176 close(classes_jsa_fd);
177 CDSFileMapHeaderBase* pheader = (CDSFileMapHeaderBase*) env->GetLongField(this_obj, p_file_map_header_ID);
178 if (pheader != NULL) {
179 free(pheader);
180 }
181 }
182 }
183
184 // Is it okay to ignore libthread_db failure? Set env var to ignore
185 // libthread_db failure. You can still debug, but will miss threads
186 // related functionality.
187 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
188
189 #define HANDLE_THREADDB_FAILURE(msg) \
190 if (sa_ignore_threaddb) { \
191 printf("libsaproc WARNING: %s\n", msg); \
192 return; \
193 } else { \
194 THROW_NEW_DEBUGGER_EXCEPTION(msg); \
195 }
196
197 #define HANDLE_THREADDB_FAILURE_(msg, ret) \
198 if (sa_ignore_threaddb) { \
199 printf("libsaproc WARNING: %s\n", msg); \
200 return ret; \
201 } else { \
202 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
203 }
204
205 static const char * alt_root = NULL;
206 static int alt_root_len = -1;
207
208 #define SA_ALTROOT "SA_ALTROOT"
209
210 static void init_alt_root() {
211 if (alt_root_len == -1) {
212 alt_root = getenv(SA_ALTROOT);
213 if (alt_root)
214 alt_root_len = strlen(alt_root);
215 else
216 alt_root_len = 0;
217 }
218 }
219
220 // This function is a complete substitute for the open system call
221 // since it's also used to override open calls from libproc to
222 // implement as a pathmap style facility for the SA. If libproc
223 // starts using other interfaces then this might have to extended to
224 // cover other calls.
225 extern "C" JNIEXPORT int JNICALL
226 libsaproc_open(const char * name, int oflag, ...) {
227 if (oflag == O_RDONLY) {
228 init_alt_root();
229
230 if (_libsaproc_debug) {
231 printf("libsaproc DEBUG: libsaproc_open %s\n", name);
232 }
233
234 if (alt_root_len > 0) {
235 int fd = -1;
236 char alt_path[PATH_MAX+1];
237
238 strcpy(alt_path, alt_root);
239 strcat(alt_path, name);
240 fd = open(alt_path, O_RDONLY);
241 if (fd >= 0) {
242 if (_libsaproc_debug) {
243 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
244 }
245 return fd;
246 }
247
248 if (strrchr(name, '/')) {
249 strcpy(alt_path, alt_root);
250 strcat(alt_path, strrchr(name, '/'));
251 fd = open(alt_path, O_RDONLY);
252 if (fd >= 0) {
253 if (_libsaproc_debug) {
254 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
255 }
256 return fd;
257 }
258 }
259 }
260 }
261
262 {
263 mode_t mode;
264 va_list ap;
265 va_start(ap, oflag);
266 mode = va_arg(ap, mode_t);
267 va_end(ap);
268
269 return open(name, oflag, mode);
270 }
271 }
272
273
274 static void * pathmap_dlopen(const char * name, int mode) {
275 init_alt_root();
276
277 if (_libsaproc_debug) {
278 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
279 }
280
281 void * handle = NULL;
282 if (alt_root_len > 0) {
283 char alt_path[PATH_MAX+1];
284 strcpy(alt_path, alt_root);
285 strcat(alt_path, name);
286 handle = dlopen(alt_path, mode);
287 if (_libsaproc_debug && handle) {
288 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
289 }
290
291 if (handle == NULL && strrchr(name, '/')) {
292 strcpy(alt_path, alt_root);
293 strcat(alt_path, strrchr(name, '/'));
294 handle = dlopen(alt_path, mode);
295 if (_libsaproc_debug && handle) {
296 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
297 }
298 }
299 }
300 if (handle == NULL) {
301 handle = dlopen(name, mode);
302 }
303 if (_libsaproc_debug) {
304 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%lx\n", name, (unsigned long) handle);
305 }
306 return handle;
307 }
308
309 // libproc and libthread_db callback functions
310
311 extern "C" {
312
313 static int
314 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
315 Debugger* dbg = (Debugger*) cd;
316 JNIEnv* env = dbg->env;
317 jobject this_obj = dbg->this_obj;
318 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
319
320 char *s1 = 0, *s2 = 0;
321 char libthread_db[PATH_MAX];
322
323 if (strstr(object_name, "/libthread.so.") == NULL)
324 return (0);
325
326 /*
327 * We found a libthread.
328 * dlopen() the matching libthread_db and get the thread agent handle.
329 */
330 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
331 (void) strcpy(libthread_db, object_name);
332 s1 = (char*) strstr(object_name, ".so.");
333 s2 = (char*) strstr(libthread_db, ".so.");
334 (void) strcpy(s2, "_db");
335 s2 += 3;
336 (void) strcpy(s2, s1);
337 } else {
338 #ifdef _LP64
339 /*
340 * The victim process is 32-bit, we are 64-bit.
341 * We have to find the 64-bit version of libthread_db
342 * that matches the victim's 32-bit version of libthread.
343 */
344 (void) strcpy(libthread_db, object_name);
345 s1 = (char*) strstr(object_name, "/libthread.so.");
346 s2 = (char*) strstr(libthread_db, "/libthread.so.");
347 (void) strcpy(s2, "/64");
348 s2 += 3;
349 (void) strcpy(s2, s1);
350 s1 = (char*) strstr(s1, ".so.");
351 s2 = (char*) strstr(s2, ".so.");
352 (void) strcpy(s2, "_db");
353 s2 += 3;
354 (void) strcpy(s2, s1);
355 #else
356 return (0);
357 #endif /* _LP64 */
358 }
359
360 void* libthread_db_handle = 0;
361 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
362 char errMsg[PATH_MAX + 256];
363 sprintf(errMsg, "Can't load %s!", libthread_db);
364 HANDLE_THREADDB_FAILURE_(errMsg, 0);
365 }
366 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
367
368 void* tmpPtr = 0;
369 tmpPtr = dlsym(libthread_db_handle, "td_init");
370 if (tmpPtr == 0) {
371 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
372 }
373 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
374
375 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
376 if (tmpPtr == 0) {
377 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
378 }
379 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
380
381 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
382 if (tmpPtr == 0) {
383 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
384 }
385 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
386
387 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
388 if (tmpPtr == 0) {
389 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
390 }
391 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
392
393 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
394 if (tmpPtr == 0) {
395 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
396 }
397 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
398
399 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
400 if (tmpPtr == 0) {
401 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
402 }
403 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
404
405 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
406 if (tmpPtr == 0) {
407 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
408 }
409 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
410
411 return 1;
412 }
413
414 static int
415 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
416 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
417 JNIEnv* env = dbgo->env;
418 jobject this_obj = dbgo->this_obj;
419 jobject list = dbgo->obj;
420
421 td_thrinfo_t thrinfo;
422 p_td_thr_get_info_t p_td_thr_get_info = (p_td_thr_get_info_t) env->GetLongField(this_obj, p_td_thr_get_info_ID);
423
424 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
425 return (0);
426
427 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
428 CHECK_EXCEPTION_(1);
429 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
430 CHECK_EXCEPTION_(1);
431 return 0;
432 }
433
434 static int
435 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
436
437 if (obj_name) {
438 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
439 JNIEnv* env = dbgo->env;
440 jobject this_obj = dbgo->this_obj;
441 jobject list = dbgo->obj;
442
443 jstring objectName = env->NewStringUTF(obj_name);
444 CHECK_EXCEPTION_(1);
445
446 jlong mapSize = (jlong) pmp->pr_size;
447 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
448 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
449 CHECK_EXCEPTION_(1);
450 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
451 CHECK_EXCEPTION_(1);
452 }
453
454 return 0;
455 }
456
457 // Pstack_iter() proc_stack_f callback prior to Nevada-B159
458 static int
459 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
460 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
461 JNIEnv* env = dbgo2->env;
462 jobject this_obj = dbgo2->this_obj;
463 jobject curFrame = dbgo2->obj2;
464
465 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
466 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
467
468 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
469 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
470
471 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
472 curFrame, pc, fp);
473 CHECK_EXCEPTION_(1);
474 if (dbgo2->obj == 0) {
475 dbgo2->obj = dbgo2->obj2;
476 }
477 return 0;
478 }
479
480 // Pstack_iter() proc_stack_f callback in Nevada-B159 or later
481 /*ARGSUSED*/
482 static int
483 wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc,
484 const long *argv, int frame_flags, int sig) {
485 return(fill_cframe_list(cd, regs, argc, argv));
486 }
487
488 //---------------------------------------------------------------
489 // Part of the class sharing workaround:
490 //
491 // With class sharing, pages are mapped from classes.jsa file.
492 // The read-only class sharing pages are mapped as MAP_SHARED,
493 // PROT_READ pages. These pages are not dumped into core dump.
494 // With this workaround, these pages are read from classes.jsa.
495
496 static bool
497 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
498 jboolean i;
499 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
500 *pvalue = i;
501 return true;
502 } else {
503 return false;
504 }
505 }
506
507 static bool
508 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
509 uintptr_t uip;
510 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
511 *pvalue = uip;
512 return true;
513 } else {
514 return false;
515 }
516 }
517
518 static bool
519 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
520 char ch = ' ';
521 size_t i = 0;
522
523 while (ch != '\0') {
524 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
525 return false;
526
527 if (i < size - 1) {
528 buf[i] = ch;
529 } else { // smaller buffer
530 return false;
531 }
532
533 i++; addr++;
534 }
535
536 buf[i] = '\0';
537 return true;
538 }
539
540 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
541 #define SHARED_BASE_ADDRESS_SYM "SharedBaseAddress"
542 // mangled symbol name for Arguments::SharedArchivePath
543 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
544
545 static uintptr_t sharedBaseAddress = 0;
546 static int
547 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
548 Debugger* dbg = (Debugger*) cd;
549 JNIEnv* env = dbg->env;
550 jobject this_obj = dbg->this_obj;
551 const char* jvm_name = 0;
552 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL) {
553 jvm_name = obj_name;
554 } else {
555 return 0;
556 }
557
558 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
559
560 // initialize classes.jsa file descriptor field.
561 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
562
563 // check whether class sharing is on by reading variable "UseSharedSpaces"
564 psaddr_t useSharedSpacesAddr = 0;
565 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
566 if (useSharedSpacesAddr == 0) {
567 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
568 }
569
570 // read the value of the flag "UseSharedSpaces"
571 // Since hotspot types are not available to build this library. So
572 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
573 // which is same as hotspot type "bool".
574 jboolean value = 0;
575 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
576 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
577 } else if ((int)value == 0) {
578 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
579 return 1;
580 }
581
582 psaddr_t sharedBaseAddressAddr = 0;
583 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedBaseAddressAddr);
584 if (sharedBaseAddressAddr == 0) {
585 print_debug("can't find symbol 'SharedBaseAddress'\n");
586 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'SharedBaseAddress' flag\n", 1);
587 }
588
589 sharedBaseAddress = 0;
590 if (read_pointer(ph, sharedBaseAddressAddr, &sharedBaseAddress) != true) {
591 print_debug("can't read the value of 'SharedBaseAddress' flag\n");
592 THROW_NEW_DEBUGGER_EXCEPTION_("can't get SharedBaseAddress from debuggee", 1);
593 }
594
595 char classes_jsa[PATH_MAX];
596 psaddr_t sharedArchivePathAddrAddr = 0;
597 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
598 if (sharedArchivePathAddrAddr == 0) {
599 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
600 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
601 }
602
603 uintptr_t sharedArchivePathAddr = 0;
604 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
605 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
606 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
607 }
608
609 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
610 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
611 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
612 }
613
614 print_debug("looking for %s\n", classes_jsa);
615
616 // open the classes.jsa
617 int fd = libsaproc_open(classes_jsa, O_RDONLY);
618 if (fd < 0) {
619 char errMsg[ERR_MSG_SIZE];
620 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
621 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
622 } else {
623 print_debug("opened shared archive file %s\n", classes_jsa);
624 }
625
626 // parse classes.jsa
627 CDSFileMapHeaderBase* pheader = (CDSFileMapHeaderBase*) malloc(sizeof(CDSFileMapHeaderBase));
628 if (pheader == NULL) {
629 close(fd);
630 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
631 }
632
633 memset(pheader, 0, sizeof(CDSFileMapHeaderBase));
634 // read CDSFileMapHeaderBase
635 size_t n = read(fd, pheader, sizeof(CDSFileMapHeaderBase));
636 if (n != sizeof(CDSFileMapHeaderBase)) {
637 char errMsg[ERR_MSG_SIZE];
638 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
639 close(fd);
640 free(pheader);
641 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
642 }
643
644 // check file magic
645 if (pheader->_magic != CDS_ARCHIVE_MAGIC) {
646 char errMsg[ERR_MSG_SIZE];
647 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0x%x",
648 classes_jsa, pheader->_magic, CDS_ARCHIVE_MAGIC);
649 close(fd);
650 free(pheader);
651 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
652 }
653
654 // check version
655 if (pheader->_version != CURRENT_CDS_ARCHIVE_VERSION) {
656 char errMsg[ERR_MSG_SIZE];
657 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
658 classes_jsa, pheader->_version, CURRENT_CDS_ARCHIVE_VERSION);
659 close(fd);
660 free(pheader);
661 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
662 }
663
664 if (_libsaproc_debug) {
665 for (int m = 0; m < NUM_CDS_REGIONS; m++) {
666 jlong mapping_offset = pheader->_space[m]._mapping_offset;
667 jlong baseAddress = (mapping_offset == 0) ? 0 : (mapping_offset + (jlong)sharedBaseAddress);
668 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
669 pheader->_space[m]._file_offset, baseAddress,
670 pheader->_space[m]._used, pheader->_space[m]._read_only);
671 }
672 }
673
674 // FIXME: For now, omitting other checks such as VM version etc.
675
676 // store class archive file fd and map header in debugger object fields
677 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
678 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
679 return 1;
680 }
681
682 } // extern "C"
683
684 // error messages for proc_arg_grab failure codes. The messages are
685 // modified versions of comments against corresponding #defines in
686 // libproc.h.
687 static const char* proc_arg_grab_errmsgs[] = {
688 "",
689 /* G_NOPROC */ "No such process",
690 /* G_NOCORE */ "No such core file",
691 /* G_NOPROCORCORE */ "No such process or core",
692 /* G_NOEXEC */ "Cannot locate executable file",
693 /* G_ZOMB */ "Zombie processs",
694 /* G_PERM */ "No permission to attach",
695 /* G_BUSY */ "Another process has already attached",
696 /* G_SYS */ "System process - can not attach",
697 /* G_SELF */ "Process is self - can't debug myself!",
698 /* G_INTR */ "Interrupt received while grabbing",
699 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
700 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
701 /* G_ELF */ "Libelf error while parsing an ELF file",
702 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
703 };
704
705 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
706 jboolean isCopy;
707 int gcode;
708 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
709 char errMsg[ERR_MSG_SIZE];
710 td_err_e te;
711 CHECK_EXCEPTION;
712 if (cmdLine_cstr == NULL) {
713 return;
714 }
715
716 // some older versions of libproc.so crash when trying to attach 32 bit
717 // debugger to 64 bit core file. check and throw error.
718 #ifndef _LP64
719 errno = 0;
720 strtol(cmdLine_cstr, NULL, 10);
721 if (errno) {
722 // core file
723 int core_fd;
724 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
725 Elf32_Ehdr e32;
726 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
727 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
728 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
729 close(core_fd);
730 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
731 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
732 }
733 close(core_fd);
734 }
735 // all other conditions are handled by libproc.so.
736 }
737 #endif
738
739 // connect to process/core
740 ps_prochandle_t* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode, NULL);
741
742 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
743
744 if (! ph) {
745 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
746 snprintf(errMsg, ERR_MSG_SIZE, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
747 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
748 } else {
749 if (_libsaproc_debug && gcode == G_STRANGE) {
750 perror("libsaproc DEBUG: ");
751 }
752 if (isProcess) {
753 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
754 } else {
755 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
756 }
757 }
758 }
759
760 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
761 // support such cross-bit-debugging. check for that combination and throw error.
762 #ifdef _LP64
763 int data_model;
764 if (ps_pdmodel(ph, &data_model) != PS_OK) {
765 Prelease(ph, PRELEASE_CLEAR);
766 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
767 }
768 if (data_model == PR_MODEL_ILP32) {
769 Prelease(ph, PRELEASE_CLEAR);
770 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
771 }
772 #endif
773
774 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
775
776 Debugger dbg;
777 dbg.env = env;
778 dbg.this_obj = this_obj;
779 jthrowable exception = 0;
780 if (! isProcess) {
781 /*
782 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
783 * These pages are mapped from the file "classes.jsa". MAP_SHARED pages are not dumped
784 * in Solaris core.To read shared heap pages, we have to read classes.jsa file.
785 */
786 Pobject_iter(ph, init_classsharing_workaround, &dbg);
787 exception = env->ExceptionOccurred();
788 if (exception) {
789 env->ExceptionClear();
790 detach_internal(env, this_obj);
791 env->Throw(exception);
792 return;
793 }
794 }
795
796 /*
797 * Iterate over the process mappings looking
798 * for libthread and then dlopen the appropriate
799 * libthread_db and get function pointers.
800 */
801 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
802 exception = env->ExceptionOccurred();
803 if (exception) {
804 env->ExceptionClear();
805 if (!sa_ignore_threaddb) {
806 detach_internal(env, this_obj);
807 env->Throw(exception);
808 }
809 return;
810 }
811
812 // init libthread_db and create thread_db agent
813 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
814 if (p_td_init == 0) {
815 if (!sa_ignore_threaddb) {
816 detach_internal(env, this_obj);
817 }
818 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
819 }
820
821 te = p_td_init();
822 if (te != TD_OK) {
823 if (!sa_ignore_threaddb) {
824 detach_internal(env, this_obj);
825 }
826 snprintf(errMsg, ERR_MSG_SIZE, "Can't initialize thread_db! td_init failed: %d", te);
827 HANDLE_THREADDB_FAILURE(errMsg);
828 }
829
830 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
831
832 td_thragent_t *p_td_thragent_t = 0;
833 te = p_td_ta_new(ph, &p_td_thragent_t);
834 if (te != TD_OK) {
835 if (!sa_ignore_threaddb) {
836 detach_internal(env, this_obj);
837 }
838 snprintf(errMsg, ERR_MSG_SIZE, "Can't create thread_db agent! td_ta_new failed: %d", te);
839 HANDLE_THREADDB_FAILURE(errMsg);
840 }
841 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
842
843 }
844
845 /*
846 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
847 * Method: attach0
848 * Signature: (Ljava/lang/String;)V
849 * Description: process detach
850 */
851 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
852 (JNIEnv *env, jobject this_obj, jstring pid) {
853 attach_internal(env, this_obj, pid, JNI_TRUE);
854 }
855
856 /*
857 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
858 * Method: attach0
859 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
860 * Description: core file detach
861 */
862 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
863 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
864 // ignore executable file name, libproc.so can detect a.out name anyway.
865 attach_internal(env, this_obj, corefile, JNI_FALSE);
866 }
867
868
869 /*
870 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
871 * Method: detach0
872 * Signature: ()V
873 * Description: process/core file detach
874 */
875 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
876 (JNIEnv *env, jobject this_obj) {
877 detach_internal(env, this_obj);
878 }
879
880 /*
881 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
882 * Method: getRemoteProcessAddressSize0
883 * Signature: ()I
884 * Description: get process/core address size
885 */
886 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
887 (JNIEnv *env, jobject this_obj) {
888 jlong p_ps_prochandle;
889 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
890 int data_model = PR_MODEL_ILP32;
891 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
892 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
893 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
894 }
895
896 /*
897 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
898 * Method: getPageSize0
899 * Signature: ()I
900 * Description: get process/core page size
901 */
902 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
903 (JNIEnv *env, jobject this_obj) {
904
905 /*
906 We are not yet attached to a java process or core file. getPageSize is called from
907 the constructor of ProcDebuggerLocal. The following won't work!
908
909 jlong p_ps_prochandle;
910 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
911 CHECK_EXCEPTION_(-1);
912 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
913 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
914 : getpagesize();
915
916 So even though core may have been generated with a different page size settings, for now
917 call getpagesize.
918 */
919
920 return getpagesize();
921 }
922
923 /*
924 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
925 * Method: getThreadIntegerRegisterSet0
926 * Signature: (J)[J
927 * Description: get gregset for a given thread specified by thread id
928 */
929 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
930 (JNIEnv *env, jobject this_obj, jlong tid) {
931 char errMsg[ERR_MSG_SIZE];
932 td_err_e te;
933 // map the thread id to thread handle
934 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);
935
936 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
937 if (p_td_thragent_t == 0) {
938 return 0;
939 }
940
941 td_thrhandle_t thr_handle;
942 te = p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle);
943 if (te != TD_OK) {
944 snprintf(errMsg, ERR_MSG_SIZE, "can't map thread id to thread handle! td_ta_map_id2thr failed: %d", te);
945 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 0);
946 }
947
948 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
949 prgregset_t gregs;
950 p_td_thr_getgregs(&thr_handle, gregs);
951
952 jlongArray res = env->NewLongArray(NPRGREG);
953 CHECK_EXCEPTION_(0);
954 jboolean isCopy;
955 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
956 CHECK_EXCEPTION_(NULL);
957 for (int i = 0; i < NPRGREG; i++) {
958 ptr[i] = (jlong) (uintptr_t) gregs[i];
959 }
960 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
961 return res;
962 }
963
964 /*
965 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
966 * Method: fillThreadList0
967 * Signature: (Ljava/util/List;)V
968 * Description: fills thread list of the debuggee process/core
969 */
970 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
971 (JNIEnv *env, jobject this_obj, jobject list) {
972
973 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
974 if (p_td_thragent_t == 0) {
975 return;
976 }
977
978 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);
979
980 DebuggerWithObject dbgo;
981 dbgo.env = env;
982 dbgo.this_obj = this_obj;
983 dbgo.obj = list;
984
985 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
986 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
987 }
988
989 /*
990 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
991 * Method: fillCFrameList0
992 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
993 * Description: fills CFrame list for a given thread
994 */
995 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
996 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
997 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
998
999 DebuggerWith2Objects dbgo2;
1000 dbgo2.env = env;
1001 dbgo2.this_obj = this_obj;
1002 dbgo2.obj = NULL;
1003 dbgo2.obj2 = NULL;
1004
1005 jboolean isCopy;
1006 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
1007 CHECK_EXCEPTION_(0);
1008
1009 prgregset_t gregs;
1010 for (int i = 0; i < NPRGREG; i++) {
1011 gregs[i] = (uintptr_t) ptr[i];
1012 }
1013
1014 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
1015 CHECK_EXCEPTION_(0);
1016
1017 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1018 wrapper_fill_cframe_list, &dbgo2);
1019 return dbgo2.obj;
1020 }
1021
1022 /*
1023 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1024 * Method: fillLoadObjectList0
1025 * Signature: (Ljava/util/List;)V
1026 * Description: fills shared objects of the debuggee process/core
1027 */
1028 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
1029 (JNIEnv *env, jobject this_obj, jobject list) {
1030 DebuggerWithObject dbgo;
1031 dbgo.env = env;
1032 dbgo.this_obj = this_obj;
1033 dbgo.obj = list;
1034
1035 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1036 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1037 }
1038
1039 /*
1040 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1041 * Method: readBytesFromProcess0
1042 * Signature: (JJ)[B
1043 * Description: read bytes from debuggee process/core
1044 */
1045 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1046 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1047
1048 jbyteArray array = env->NewByteArray(numBytes);
1049 CHECK_EXCEPTION_(0);
1050 jboolean isCopy;
1051 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1052 CHECK_EXCEPTION_(0);
1053
1054 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1055 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1056 (psaddr_t)address, bufPtr, (size_t)numBytes);
1057
1058 if (ret != PS_OK) {
1059 // part of the class sharing workaround. try shared heap area
1060 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1061 if (classes_jsa_fd != -1 && address != (jlong)0) {
1062 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1063
1064 CDSFileMapHeaderBase* pheader = (CDSFileMapHeaderBase*) env->GetLongField(this_obj, p_file_map_header_ID);
1065 // walk through the shared mappings -- we just have 9 of them.
1066 // so, linear walking is okay.
1067 for (int m = 0; m < NUM_CDS_REGIONS; m++) {
1068
1069 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1070 // and hence will be read by libproc. Besides, the file copy may be
1071 // stale because the process might have modified those pages.
1072 if (pheader->_space[m]._read_only) {
1073 jlong mapping_offset = (jlong) (uintptr_t) pheader->_space[m]._mapping_offset;
1074 jlong baseAddress = mapping_offset + (jlong)sharedBaseAddress;
1075 size_t usedSize = pheader->_space[m]._used;
1076 if (mapping_offset != 0 && address >= baseAddress && address < (baseAddress + usedSize)) {
1077 // the given address falls in this shared metadata area
1078 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1079
1080
1081 // If more data is asked than actually mapped from file, we need to zero fill
1082 // till the end-of-page boundary. But, java array new does that for us. we just
1083 // need to read as much as data available.
1084
1085 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1086
1087 jlong diff = address - baseAddress;
1088 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1089 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1090 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1091 if (bytesRead != bytesToRead) {
1092 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1093 print_debug("shared map read failed\n");
1094 return jbyteArray(0);
1095 } else {
1096 print_debug("shared map read succeeded\n");
1097 env->ReleaseByteArrayElements(array, bufPtr, 0);
1098 return array;
1099 }
1100 } // is in current map
1101 } // is read only map
1102 } // for shared maps
1103 } // classes_jsa_fd != -1
1104 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1105 return jbyteArray(0);
1106 } else {
1107 env->ReleaseByteArrayElements(array, bufPtr, 0);
1108 return array;
1109 }
1110 }
1111
1112 /*
1113 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1114 * Method: writeBytesToProcess0
1115 * Signature: (JJ[B)V
1116 * Description: write bytes into debugger process
1117 */
1118 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1119 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1120 char errMsg[ERR_MSG_SIZE];
1121 ps_err_e pe;
1122 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1123 jboolean isCopy;
1124 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1125 CHECK_EXCEPTION;
1126
1127 pe = ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes);
1128 if (pe != PS_OK) {
1129 snprintf(errMsg, ERR_MSG_SIZE, "Process write failed! ps_pwrite failed: %d", pe);
1130 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1131 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
1132 }
1133
1134 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1135 }
1136
1137 /*
1138 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1139 * Method: suspend0
1140 * Signature: ()V
1141 */
1142 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1143 (JNIEnv *env, jobject this_obj) {
1144 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1145 // for now don't check return value. revisit this again.
1146 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1147 }
1148
1149 /*
1150 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1151 * Method: resume0
1152 * Signature: ()V
1153 */
1154 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1155 (JNIEnv *env, jobject this_obj) {
1156 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1157 // for now don't check return value. revisit this again.
1158 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1159 }
1160
1161 /*
1162 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1163 * Method: lookupByName0
1164 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1165 * Description: symbol lookup by name
1166 */
1167 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1168 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1169 jlong p_ps_prochandle;
1170 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1171
1172 jboolean isCopy;
1173 const char* objectName_cstr = NULL;
1174 if (objectName != NULL) {
1175 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1176 CHECK_EXCEPTION_(0);
1177 } else {
1178 objectName_cstr = PR_OBJ_EVERY;
1179 }
1180
1181 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1182 CHECK_EXCEPTION_(0);
1183
1184 psaddr_t symbol_addr = (psaddr_t) 0;
1185 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1186 symbolName_cstr, &symbol_addr);
1187
1188 if (symbol_addr == 0) {
1189 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1190 }
1191
1192 if (objectName_cstr != PR_OBJ_EVERY) {
1193 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1194 }
1195 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1196 return (jlong) (uintptr_t) symbol_addr;
1197 }
1198
1199 /*
1200 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1201 * Method: lookupByAddress0
1202 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1203 * Description: lookup symbol name for a given address
1204 */
1205 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1206 (JNIEnv *env, jobject this_obj, jlong address) {
1207 jlong p_ps_prochandle;
1208 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1209
1210 char nameBuf[SYMBOL_BUF_SIZE + 1];
1211 GElf_Sym sym;
1212 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1213 nameBuf, sizeof(nameBuf), &sym, NULL);
1214
1215 if (res != 0) { // failed
1216 return 0;
1217 }
1218
1219 jstring resSym = env->NewStringUTF(nameBuf);
1220 CHECK_EXCEPTION_(0);
1221
1222 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1223 }
1224
1225 /*
1226 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1227 * Method: demangle0
1228 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1229 */
1230 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1231 (JNIEnv *env, jobject this_object, jstring name) {
1232 jboolean isCopy;
1233 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1234 CHECK_EXCEPTION_(NULL);
1235 char buf[2*SYMBOL_BUF_SIZE + 1];
1236 jstring res = 0;
1237 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1238 res = env->NewStringUTF(buf);
1239 } else {
1240 res = name;
1241 }
1242 env->ReleaseStringUTFChars(name, ptr);
1243 return res;
1244 }
1245
1246 /*
1247 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1248 * Method: initIDs
1249 * Signature: ()V
1250 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1251 */
1252 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1253 (JNIEnv *env, jclass clazz) {
1254 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1255 if (_libsaproc_debug) {
1256 // propagate debug mode to libproc.so
1257 static const char* var = "LIBPROC_DEBUG=1";
1258 putenv((char*)var);
1259 }
1260
1261 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1262 if (libproc_handle == 0)
1263 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1264
1265 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1266 CHECK_EXCEPTION;
1267
1268 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1269 CHECK_EXCEPTION;
1270
1271 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1272 CHECK_EXCEPTION;
1273
1274 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1275 CHECK_EXCEPTION;
1276
1277 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1278 CHECK_EXCEPTION;
1279
1280 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1281 CHECK_EXCEPTION;
1282
1283 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1284 CHECK_EXCEPTION;
1285
1286 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1287 CHECK_EXCEPTION;
1288
1289 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1290 CHECK_EXCEPTION;
1291
1292 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1293 CHECK_EXCEPTION;
1294
1295 getThreadForThreadId_ID = env->GetMethodID(clazz,
1296 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1297 CHECK_EXCEPTION;
1298
1299 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1300 CHECK_EXCEPTION;
1301
1302 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1303 CHECK_EXCEPTION;
1304
1305 createSenderFrame_ID = env->GetMethodID(clazz,
1306 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1307 CHECK_EXCEPTION;
1308
1309 createLoadObject_ID = env->GetMethodID(clazz,
1310 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1311 CHECK_EXCEPTION;
1312
1313 createClosestSymbol_ID = env->GetMethodID(clazz,
1314 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1315 CHECK_EXCEPTION;
1316
1317 jclass list_clazz = env->FindClass("java/util/List");
1318 CHECK_EXCEPTION;
1319 listAdd_ID = env->GetMethodID(list_clazz, "add", "(Ljava/lang/Object;)Z");
1320 CHECK_EXCEPTION;
1321
1322 // part of the class sharing workaround
1323 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1324 CHECK_EXCEPTION;
1325 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1326 CHECK_EXCEPTION;
1327 }