Mon, 02 May 2011 14:53:49 -0700
7028172: 3/4 SA needs to adapt to Solaris libproc change made in 6748307
Summary: Support build and runtime configs of old and new interfaces as appropriate.
Reviewed-by: acorn, never
1 /*
2 * Copyright (c) 2002, 2011, 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 */
25 #include "salibproc.h"
26 #include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h"
27 #ifndef SOLARIS_11_B159_OR_LATER
28 #include <sys/utsname.h>
29 #endif
30 #include <thread_db.h>
31 #include <strings.h>
32 #include <limits.h>
33 #include <demangle.h>
34 #include <stdarg.h>
35 #include <stdlib.h>
36 #include <errno.h>
38 #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; }
39 #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;}
40 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; }
41 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;}
43 #define SYMBOL_BUF_SIZE 256
44 #define ERR_MSG_SIZE (PATH_MAX + 256)
46 // debug modes
47 static int _libsaproc_debug = 0;
48 #ifndef SOLARIS_11_B159_OR_LATER
49 static bool _Pstack_iter_debug = false;
51 static void dprintf_2(const char* format,...) {
52 if (_Pstack_iter_debug) {
53 va_list alist;
55 va_start(alist, format);
56 fputs("Pstack_iter DEBUG: ", stderr);
57 vfprintf(stderr, format, alist);
58 va_end(alist);
59 }
60 }
61 #endif // !SOLARIS_11_B159_OR_LATER
63 static void print_debug(const char* format,...) {
64 if (_libsaproc_debug) {
65 va_list alist;
67 va_start(alist, format);
68 fputs("libsaproc DEBUG: ", stderr);
69 vfprintf(stderr, format, alist);
70 va_end(alist);
71 }
72 }
74 struct Debugger {
75 JNIEnv* env;
76 jobject this_obj;
77 };
79 struct DebuggerWithObject : Debugger {
80 jobject obj;
81 };
83 struct DebuggerWith2Objects : DebuggerWithObject {
84 jobject obj2;
85 };
87 /*
88 * Portions of user thread level detail gathering code is from pstack source
89 * code. See pstack.c in Solaris 2.8 user commands source code.
90 */
92 static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) {
93 env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), errMsg);
94 }
96 // JNI ids for some fields, methods
98 // libproc handler pointer
99 static jfieldID p_ps_prochandle_ID = 0;
101 // libthread.so dlopen handle, thread agent ptr and function pointers
102 static jfieldID libthread_db_handle_ID = 0;
103 static jfieldID p_td_thragent_t_ID = 0;
104 static jfieldID p_td_init_ID = 0;
105 static jfieldID p_td_ta_new_ID = 0;
106 static jfieldID p_td_ta_delete_ID = 0;
107 static jfieldID p_td_ta_thr_iter_ID = 0;
108 static jfieldID p_td_thr_get_info_ID = 0;
109 static jfieldID p_td_ta_map_id2thr_ID = 0;
110 static jfieldID p_td_thr_getgregs_ID = 0;
112 // reg index fields
113 static jfieldID pcRegIndex_ID = 0;
114 static jfieldID fpRegIndex_ID = 0;
116 // part of the class sharing workaround
117 static jfieldID classes_jsa_fd_ID = 0;
118 static jfieldID p_file_map_header_ID = 0;
120 // method ids
122 static jmethodID getThreadForThreadId_ID = 0;
123 static jmethodID createSenderFrame_ID = 0;
124 static jmethodID createLoadObject_ID = 0;
125 static jmethodID createClosestSymbol_ID = 0;
126 static jmethodID listAdd_ID = 0;
128 /*
129 * Functions we need from libthread_db
130 */
131 typedef td_err_e
132 (*p_td_init_t)(void);
133 typedef td_err_e
134 (*p_td_ta_new_t)(void *, td_thragent_t **);
135 typedef td_err_e
136 (*p_td_ta_delete_t)(td_thragent_t *);
137 typedef td_err_e
138 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *,
139 td_thr_state_e, int, sigset_t *, unsigned);
140 typedef td_err_e
141 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *);
142 typedef td_err_e
143 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *);
144 typedef td_err_e
145 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t);
147 static void
148 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) {
149 // release libthread_db agent, if we had created
150 p_td_ta_delete_t p_td_ta_delete = 0;
151 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID);
153 td_thragent_t *p_td_thragent_t = 0;
154 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
155 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) {
156 p_td_ta_delete(p_td_thragent_t);
157 }
159 // dlclose libthread_db.so
160 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID);
161 if (libthread_db_handle != 0) {
162 dlclose(libthread_db_handle);
163 }
165 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0);
166 env->SetLongField(this_obj, p_td_init_ID, (jlong)0);
167 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0);
168 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0);
169 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0);
170 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0);
171 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0);
172 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0);
173 }
176 static void detach_internal(JNIEnv* env, jobject this_obj) {
177 // clear libthread_db stuff
178 clear_libthread_db_ptrs(env, this_obj);
180 // release ptr to ps_prochandle
181 jlong p_ps_prochandle;
182 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
183 if (p_ps_prochandle != 0L) {
184 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR);
185 }
187 // part of the class sharing workaround
188 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
189 if (classes_jsa_fd != -1) {
190 close(classes_jsa_fd);
191 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
192 if (pheader != NULL) {
193 free(pheader);
194 }
195 }
196 }
198 // Is it okay to ignore libthread_db failure? Set env var to ignore
199 // libthread_db failure. You can still debug, but will miss threads
200 // related functionality.
201 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0);
203 #define HANDLE_THREADDB_FAILURE(msg) \
204 if (sa_ignore_threaddb) { \
205 printf("libsaproc WARNING: %s\n", msg); \
206 return; \
207 } else { \
208 THROW_NEW_DEBUGGER_EXCEPTION(msg); \
209 }
211 #define HANDLE_THREADDB_FAILURE_(msg, ret) \
212 if (sa_ignore_threaddb) { \
213 printf("libsaproc WARNING: %s\n", msg); \
214 return ret; \
215 } else { \
216 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \
217 }
219 static const char * alt_root = NULL;
220 static int alt_root_len = -1;
222 #define SA_ALTROOT "SA_ALTROOT"
224 static void init_alt_root() {
225 if (alt_root_len == -1) {
226 alt_root = getenv(SA_ALTROOT);
227 if (alt_root)
228 alt_root_len = strlen(alt_root);
229 else
230 alt_root_len = 0;
231 }
232 }
234 // This function is a complete substitute for the open system call
235 // since it's also used to override open calls from libproc to
236 // implement as a pathmap style facility for the SA. If libproc
237 // starts using other interfaces then this might have to extended to
238 // cover other calls.
239 extern "C" int libsaproc_open(const char * name, int oflag, ...) {
240 if (oflag == O_RDONLY) {
241 init_alt_root();
243 if (_libsaproc_debug) {
244 printf("libsaproc DEBUG: libsaproc_open %s\n", name);
245 }
247 if (alt_root_len > 0) {
248 int fd = -1;
249 char alt_path[PATH_MAX+1];
251 strcpy(alt_path, alt_root);
252 strcat(alt_path, name);
253 fd = open(alt_path, O_RDONLY);
254 if (fd >= 0) {
255 if (_libsaproc_debug) {
256 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
257 }
258 return fd;
259 }
261 if (strrchr(name, '/')) {
262 strcpy(alt_path, alt_root);
263 strcat(alt_path, strrchr(name, '/'));
264 fd = open(alt_path, O_RDONLY);
265 if (fd >= 0) {
266 if (_libsaproc_debug) {
267 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path);
268 }
269 return fd;
270 }
271 }
272 }
273 }
275 {
276 mode_t mode;
277 va_list ap;
278 va_start(ap, oflag);
279 mode = va_arg(ap, mode_t);
280 va_end(ap);
282 return open(name, oflag, mode);
283 }
284 }
287 static void * pathmap_dlopen(const char * name, int mode) {
288 init_alt_root();
290 if (_libsaproc_debug) {
291 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name);
292 }
294 void * handle = NULL;
295 if (alt_root_len > 0) {
296 char alt_path[PATH_MAX+1];
297 strcpy(alt_path, alt_root);
298 strcat(alt_path, name);
299 handle = dlopen(alt_path, mode);
300 if (_libsaproc_debug && handle) {
301 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
302 }
304 if (handle == NULL && strrchr(name, '/')) {
305 strcpy(alt_path, alt_root);
306 strcat(alt_path, strrchr(name, '/'));
307 handle = dlopen(alt_path, mode);
308 if (_libsaproc_debug && handle) {
309 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path);
310 }
311 }
312 }
313 if (handle == NULL) {
314 handle = dlopen(name, mode);
315 }
316 if (_libsaproc_debug) {
317 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%x\n", name, handle);
318 }
319 return handle;
320 }
322 // libproc and libthread_db callback functions
324 extern "C" {
326 static int
327 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) {
328 Debugger* dbg = (Debugger*) cd;
329 JNIEnv* env = dbg->env;
330 jobject this_obj = dbg->this_obj;
331 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
333 char *s1 = 0, *s2 = 0;
334 char libthread_db[PATH_MAX];
336 if (strstr(object_name, "/libthread.so.") == NULL)
337 return (0);
339 /*
340 * We found a libthread.
341 * dlopen() the matching libthread_db and get the thread agent handle.
342 */
343 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) {
344 (void) strcpy(libthread_db, object_name);
345 s1 = (char*) strstr(object_name, ".so.");
346 s2 = (char*) strstr(libthread_db, ".so.");
347 (void) strcpy(s2, "_db");
348 s2 += 3;
349 (void) strcpy(s2, s1);
350 } else {
351 #ifdef _LP64
352 /*
353 * The victim process is 32-bit, we are 64-bit.
354 * We have to find the 64-bit version of libthread_db
355 * that matches the victim's 32-bit version of libthread.
356 */
357 (void) strcpy(libthread_db, object_name);
358 s1 = (char*) strstr(object_name, "/libthread.so.");
359 s2 = (char*) strstr(libthread_db, "/libthread.so.");
360 (void) strcpy(s2, "/64");
361 s2 += 3;
362 (void) strcpy(s2, s1);
363 s1 = (char*) strstr(s1, ".so.");
364 s2 = (char*) strstr(s2, ".so.");
365 (void) strcpy(s2, "_db");
366 s2 += 3;
367 (void) strcpy(s2, s1);
368 #else
369 return (0);
370 #endif /* _LP64 */
371 }
373 void* libthread_db_handle = 0;
374 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) {
375 char errMsg[PATH_MAX + 256];
376 sprintf(errMsg, "Can't load %s!", libthread_db);
377 HANDLE_THREADDB_FAILURE_(errMsg, 0);
378 }
379 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle);
381 void* tmpPtr = 0;
382 tmpPtr = dlsym(libthread_db_handle, "td_init");
383 if (tmpPtr == 0) {
384 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0);
385 }
386 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr);
388 tmpPtr =dlsym(libthread_db_handle, "td_ta_new");
389 if (tmpPtr == 0) {
390 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0);
391 }
392 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr);
394 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete");
395 if (tmpPtr == 0) {
396 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0);
397 }
398 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr);
400 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter");
401 if (tmpPtr == 0) {
402 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0);
403 }
404 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr);
406 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info");
407 if (tmpPtr == 0) {
408 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0);
409 }
410 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr);
412 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr");
413 if (tmpPtr == 0) {
414 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0);
415 }
416 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr);
418 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs");
419 if (tmpPtr == 0) {
420 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0);
421 }
422 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr);
424 return 1;
425 }
427 static int
428 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) {
429 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
430 JNIEnv* env = dbgo->env;
431 jobject this_obj = dbgo->this_obj;
432 jobject list = dbgo->obj;
434 td_thrinfo_t thrinfo;
435 p_td_thr_get_info_t p_td_thr_get_info = (p_td_thr_get_info_t) env->GetLongField(this_obj, p_td_thr_get_info_ID);
437 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK)
438 return (0);
440 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid);
441 CHECK_EXCEPTION_(1);
442 env->CallBooleanMethod(list, listAdd_ID, threadProxy);
443 CHECK_EXCEPTION_(1);
444 return 0;
445 }
447 static int
448 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) {
450 if (obj_name) {
451 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd;
452 JNIEnv* env = dbgo->env;
453 jobject this_obj = dbgo->this_obj;
454 jobject list = dbgo->obj;
456 jstring objectName = env->NewStringUTF(obj_name);
457 CHECK_EXCEPTION_(1);
459 jlong mapSize = (jlong) pmp->pr_size;
460 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID,
461 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr);
462 CHECK_EXCEPTION_(1);
463 env->CallBooleanMethod(list, listAdd_ID, sharedObject);
464 CHECK_EXCEPTION_(1);
465 }
467 return 0;
468 }
470 // Pstack_iter() proc_stack_f callback prior to Nevada-B159
471 static int
472 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) {
473 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd;
474 JNIEnv* env = dbgo2->env;
475 jobject this_obj = dbgo2->this_obj;
476 jobject curFrame = dbgo2->obj2;
478 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID);
479 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID);
481 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex];
482 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex];
484 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID,
485 curFrame, pc, fp);
486 CHECK_EXCEPTION_(1);
487 if (dbgo2->obj == 0) {
488 dbgo2->obj = dbgo2->obj2;
489 }
490 return 0;
491 }
493 // Pstack_iter() proc_stack_f callback in Nevada-B159 or later
494 /*ARGSUSED*/
495 static int
496 wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc,
497 const long *argv, int frame_flags, int sig) {
498 return(fill_cframe_list(cd, regs, argc, argv));
499 }
501 // part of the class sharing workaround
503 // FIXME: !!HACK ALERT!!
505 // The format of sharing achive file header is needed to read shared heap
506 // file mappings. For now, I am hard coding portion of FileMapHeader here.
507 // Refer to filemap.hpp.
509 // FileMapHeader describes the shared space data in the file to be
510 // mapped. This structure gets written to a file. It is not a class, so
511 // that the compilers don't add any compiler-private data to it.
513 // Refer to CompactingPermGenGen::n_regions in compactingPermGenGen.hpp
514 const int NUM_SHARED_MAPS = 4;
516 // Refer to FileMapInfo::_current_version in filemap.hpp
517 const int CURRENT_ARCHIVE_VERSION = 1;
519 struct FileMapHeader {
520 int _magic; // identify file type.
521 int _version; // (from enum, above.)
522 size_t _alignment; // how shared archive should be aligned
525 struct space_info {
526 int _file_offset; // sizeof(this) rounded to vm page size
527 char* _base; // copy-on-write base address
528 size_t _capacity; // for validity checking
529 size_t _used; // for setting space top on read
531 bool _read_only; // read only space?
532 bool _allow_exec; // executable code in space?
534 } _space[NUM_SHARED_MAPS]; // was _space[CompactingPermGenGen::n_regions];
536 // Ignore the rest of the FileMapHeader. We don't need those fields here.
537 };
539 static bool
540 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) {
541 jboolean i;
542 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) {
543 *pvalue = i;
544 return true;
545 } else {
546 return false;
547 }
548 }
550 static bool
551 read_pointer(struct ps_prochandle* ph, psaddr_t addr, uintptr_t* pvalue) {
552 uintptr_t uip;
553 if (ps_pread(ph, addr, &uip, sizeof(uip)) == PS_OK) {
554 *pvalue = uip;
555 return true;
556 } else {
557 return false;
558 }
559 }
561 static bool
562 read_string(struct ps_prochandle* ph, psaddr_t addr, char* buf, size_t size) {
563 char ch = ' ';
564 size_t i = 0;
566 while (ch != '\0') {
567 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK)
568 return false;
570 if (i < size - 1) {
571 buf[i] = ch;
572 } else { // smaller buffer
573 return false;
574 }
576 i++; addr++;
577 }
579 buf[i] = '\0';
580 return true;
581 }
583 #define USE_SHARED_SPACES_SYM "UseSharedSpaces"
584 // mangled symbol name for Arguments::SharedArchivePath
585 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_"
587 static int
588 init_classsharing_workaround(void *cd, const prmap_t* pmap, const char* obj_name) {
589 Debugger* dbg = (Debugger*) cd;
590 JNIEnv* env = dbg->env;
591 jobject this_obj = dbg->this_obj;
592 const char* jvm_name = 0;
593 if ((jvm_name = strstr(obj_name, "libjvm.so")) != NULL ||
594 (jvm_name = strstr(obj_name, "libjvm_g.so")) != NULL) {
595 jvm_name = obj_name;
596 } else {
597 return 0;
598 }
600 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID);
602 // initialize classes[_g].jsa file descriptor field.
603 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1);
605 // check whether class sharing is on by reading variable "UseSharedSpaces"
606 psaddr_t useSharedSpacesAddr = 0;
607 ps_pglobal_lookup(ph, jvm_name, USE_SHARED_SPACES_SYM, &useSharedSpacesAddr);
608 if (useSharedSpacesAddr == 0) {
609 THROW_NEW_DEBUGGER_EXCEPTION_("can't find 'UseSharedSpaces' flag\n", 1);
610 }
612 // read the value of the flag "UseSharedSpaces"
613 // Since hotspot types are not available to build this library. So
614 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces"
615 // which is same as hotspot type "bool".
616 jboolean value = 0;
617 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) {
618 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1);
619 } else if ((int)value == 0) {
620 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n");
621 return 1;
622 }
624 char classes_jsa[PATH_MAX];
625 psaddr_t sharedArchivePathAddrAddr = 0;
626 ps_pglobal_lookup(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM, &sharedArchivePathAddrAddr);
627 if (sharedArchivePathAddrAddr == 0) {
628 print_debug("can't find symbol 'Arguments::SharedArchivePath'\n");
629 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
630 }
632 uintptr_t sharedArchivePathAddr = 0;
633 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) {
634 print_debug("can't find read pointer 'Arguments::SharedArchivePath'\n");
635 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
636 }
638 if (read_string(ph, (psaddr_t)sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) {
639 print_debug("can't find read 'Arguments::SharedArchivePath' value\n");
640 THROW_NEW_DEBUGGER_EXCEPTION_("can't get shared archive path from debuggee", 1);
641 }
643 print_debug("looking for %s\n", classes_jsa);
645 // open the classes[_g].jsa
646 int fd = libsaproc_open(classes_jsa, O_RDONLY);
647 if (fd < 0) {
648 char errMsg[ERR_MSG_SIZE];
649 sprintf(errMsg, "can't open shared archive file %s", classes_jsa);
650 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
651 } else {
652 print_debug("opened shared archive file %s\n", classes_jsa);
653 }
655 // parse classes[_g].jsa
656 struct FileMapHeader* pheader = (struct FileMapHeader*) malloc(sizeof(struct FileMapHeader));
657 if (pheader == NULL) {
658 close(fd);
659 THROW_NEW_DEBUGGER_EXCEPTION_("can't allocate memory for shared file map header", 1);
660 }
662 memset(pheader, 0, sizeof(struct FileMapHeader));
663 // read FileMapHeader
664 size_t n = read(fd, pheader, sizeof(struct FileMapHeader));
665 if (n != sizeof(struct FileMapHeader)) {
666 free(pheader);
667 close(fd);
668 char errMsg[ERR_MSG_SIZE];
669 sprintf(errMsg, "unable to read shared archive file map header from %s", classes_jsa);
670 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
671 }
673 // check file magic
674 if (pheader->_magic != 0xf00baba2) {
675 free(pheader);
676 close(fd);
677 char errMsg[ERR_MSG_SIZE];
678 sprintf(errMsg, "%s has bad shared archive magic 0x%x, expecting 0xf00baba2",
679 classes_jsa, pheader->_magic);
680 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
681 }
683 // check version
684 if (pheader->_version != CURRENT_ARCHIVE_VERSION) {
685 free(pheader);
686 close(fd);
687 char errMsg[ERR_MSG_SIZE];
688 sprintf(errMsg, "%s has wrong shared archive version %d, expecting %d",
689 classes_jsa, pheader->_version, CURRENT_ARCHIVE_VERSION);
690 THROW_NEW_DEBUGGER_EXCEPTION_(errMsg, 1);
691 }
693 if (_libsaproc_debug) {
694 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
695 print_debug("shared file offset %d mapped at 0x%lx, size = %ld, read only? = %d\n",
696 pheader->_space[m]._file_offset, pheader->_space[m]._base,
697 pheader->_space[m]._used, pheader->_space[m]._read_only);
698 }
699 }
701 // FIXME: For now, omitting other checks such as VM version etc.
703 // store class archive file fd and map header in debugger object fields
704 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, fd);
705 dbg->env->SetLongField(this_obj, p_file_map_header_ID, (jlong)(uintptr_t) pheader);
706 return 1;
707 }
709 } // extern "C"
711 // error messages for proc_arg_grab failure codes. The messages are
712 // modified versions of comments against corresponding #defines in
713 // libproc.h.
714 static const char* proc_arg_grab_errmsgs[] = {
715 "",
716 /* G_NOPROC */ "No such process",
717 /* G_NOCORE */ "No such core file",
718 /* G_NOPROCORCORE */ "No such process or core",
719 /* G_NOEXEC */ "Cannot locate executable file",
720 /* G_ZOMB */ "Zombie processs",
721 /* G_PERM */ "No permission to attach",
722 /* G_BUSY */ "Another process has already attached",
723 /* G_SYS */ "System process - can not attach",
724 /* G_SELF */ "Process is self - can't debug myself!",
725 /* G_INTR */ "Interrupt received while grabbing",
726 /* G_LP64 */ "debuggee is 64 bit, use java -d64 for debugger",
727 /* G_FORMAT */ "File is not an ELF format core file - corrupted core?",
728 /* G_ELF */ "Libelf error while parsing an ELF file",
729 /* G_NOTE */ "Required PT_NOTE Phdr not present - corrupted core?",
730 };
732 static void attach_internal(JNIEnv* env, jobject this_obj, jstring cmdLine, jboolean isProcess) {
733 jboolean isCopy;
734 int gcode;
735 const char* cmdLine_cstr = env->GetStringUTFChars(cmdLine, &isCopy);
736 CHECK_EXCEPTION;
738 // some older versions of libproc.so crash when trying to attach 32 bit
739 // debugger to 64 bit core file. check and throw error.
740 #ifndef _LP64
741 atoi(cmdLine_cstr);
742 if (errno) {
743 // core file
744 int core_fd;
745 if ((core_fd = open64(cmdLine_cstr, O_RDONLY)) >= 0) {
746 Elf32_Ehdr e32;
747 if (pread64(core_fd, &e32, sizeof (e32), 0) == sizeof (e32) &&
748 memcmp(&e32.e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0 &&
749 e32.e_type == ET_CORE && e32.e_ident[EI_CLASS] == ELFCLASS64) {
750 close(core_fd);
751 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use java -d64 for debugger");
752 }
753 close(core_fd);
754 }
755 // all other conditions are handled by libproc.so.
756 }
757 #endif
759 // connect to process/core
760 struct ps_prochandle* ph = proc_arg_grab(cmdLine_cstr, (isProcess? PR_ARG_PIDS : PR_ARG_CORES), PGRAB_FORCE, &gcode);
761 env->ReleaseStringUTFChars(cmdLine, cmdLine_cstr);
762 if (! ph) {
763 if (gcode > 0 && gcode < sizeof(proc_arg_grab_errmsgs)/sizeof(const char*)) {
764 char errMsg[ERR_MSG_SIZE];
765 sprintf(errMsg, "Attach failed : %s", proc_arg_grab_errmsgs[gcode]);
766 THROW_NEW_DEBUGGER_EXCEPTION(errMsg);
767 } else {
768 if (_libsaproc_debug && gcode == G_STRANGE) {
769 perror("libsaproc DEBUG: ");
770 }
771 if (isProcess) {
772 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to process!");
773 } else {
774 THROW_NEW_DEBUGGER_EXCEPTION("Not able to attach to core file!");
775 }
776 }
777 }
779 // even though libproc.so supports 64 bit debugger and 32 bit debuggee, we don't
780 // support such cross-bit-debugging. check for that combination and throw error.
781 #ifdef _LP64
782 int data_model;
783 if (ps_pdmodel(ph, &data_model) != PS_OK) {
784 Prelease(ph, PRELEASE_CLEAR);
785 THROW_NEW_DEBUGGER_EXCEPTION("can't determine debuggee data model (ILP32? or LP64?)");
786 }
787 if (data_model == PR_MODEL_ILP32) {
788 Prelease(ph, PRELEASE_CLEAR);
789 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
790 }
791 #endif
793 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph);
795 Debugger dbg;
796 dbg.env = env;
797 dbg.this_obj = this_obj;
798 jthrowable exception = 0;
799 if (! isProcess) {
800 /*
801 * With class sharing, shared perm. gen heap is allocated in with MAP_SHARED|PROT_READ.
802 * These pages are mapped from the file "classes[_g].jsa". MAP_SHARED pages are not dumped
803 * in Solaris core.To read shared heap pages, we have to read classes[_g].jsa file.
804 */
805 Pobject_iter(ph, init_classsharing_workaround, &dbg);
806 exception = env->ExceptionOccurred();
807 if (exception) {
808 env->ExceptionClear();
809 detach_internal(env, this_obj);
810 env->Throw(exception);
811 return;
812 }
813 }
815 /*
816 * Iterate over the process mappings looking
817 * for libthread and then dlopen the appropriate
818 * libthread_db and get function pointers.
819 */
820 Pobject_iter(ph, init_libthread_db_ptrs, &dbg);
821 exception = env->ExceptionOccurred();
822 if (exception) {
823 env->ExceptionClear();
824 if (!sa_ignore_threaddb) {
825 detach_internal(env, this_obj);
826 env->Throw(exception);
827 }
828 return;
829 }
831 // init libthread_db and create thread_db agent
832 p_td_init_t p_td_init = (p_td_init_t) env->GetLongField(this_obj, p_td_init_ID);
833 if (p_td_init == 0) {
834 if (!sa_ignore_threaddb) {
835 detach_internal(env, this_obj);
836 }
837 HANDLE_THREADDB_FAILURE("Did not find libthread in target process/core!");
838 }
840 if (p_td_init() != TD_OK) {
841 if (!sa_ignore_threaddb) {
842 detach_internal(env, this_obj);
843 }
844 HANDLE_THREADDB_FAILURE("Can't initialize thread_db!");
845 }
847 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID);
849 td_thragent_t *p_td_thragent_t = 0;
850 if (p_td_ta_new(ph, &p_td_thragent_t) != TD_OK) {
851 if (!sa_ignore_threaddb) {
852 detach_internal(env, this_obj);
853 }
854 HANDLE_THREADDB_FAILURE("Can't create thread_db agent!");
855 }
856 env->SetLongField(this_obj, p_td_thragent_t_ID, (jlong)(uintptr_t) p_td_thragent_t);
858 }
860 /*
861 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
862 * Method: attach0
863 * Signature: (Ljava/lang/String;)V
864 * Description: process detach
865 */
866 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2
867 (JNIEnv *env, jobject this_obj, jstring pid) {
868 attach_internal(env, this_obj, pid, JNI_TRUE);
869 }
871 /*
872 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
873 * Method: attach0
874 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
875 * Description: core file detach
876 */
877 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
878 (JNIEnv *env, jobject this_obj, jstring executable, jstring corefile) {
879 // ignore executable file name, libproc.so can detect a.out name anyway.
880 attach_internal(env, this_obj, corefile, JNI_FALSE);
881 }
884 /*
885 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
886 * Method: detach0
887 * Signature: ()V
888 * Description: process/core file detach
889 */
890 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_detach0
891 (JNIEnv *env, jobject this_obj) {
892 detach_internal(env, this_obj);
893 }
895 /*
896 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
897 * Method: getRemoteProcessAddressSize0
898 * Signature: ()I
899 * Description: get process/core address size
900 */
901 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getRemoteProcessAddressSize0
902 (JNIEnv *env, jobject this_obj) {
903 jlong p_ps_prochandle;
904 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
905 int data_model = PR_MODEL_ILP32;
906 ps_pdmodel((struct ps_prochandle*) p_ps_prochandle, &data_model);
907 print_debug("debuggee is %d bit\n", data_model == PR_MODEL_ILP32? 32 : 64);
908 return (jint) data_model == PR_MODEL_ILP32? 32 : 64;
909 }
911 /*
912 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
913 * Method: getPageSize0
914 * Signature: ()I
915 * Description: get process/core page size
916 */
917 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getPageSize0
918 (JNIEnv *env, jobject this_obj) {
920 /*
921 We are not yet attached to a java process or core file. getPageSize is called from
922 the constructor of ProcDebuggerLocal. The following won't work!
924 jlong p_ps_prochandle;
925 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
926 CHECK_EXCEPTION_(-1);
927 struct ps_prochandle* prochandle = (struct ps_prochandle*) p_ps_prochandle;
928 return (Pstate(prochandle) == PS_DEAD) ? Pgetauxval(prochandle, AT_PAGESZ)
929 : getpagesize();
931 So even though core may have been generated with a different page size settings, for now
932 call getpagesize.
933 */
935 return getpagesize();
936 }
938 /*
939 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
940 * Method: getThreadIntegerRegisterSet0
941 * Signature: (J)[J
942 * Description: get gregset for a given thread specified by thread id
943 */
944 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_getThreadIntegerRegisterSet0
945 (JNIEnv *env, jobject this_obj, jlong tid) {
946 // map the thread id to thread handle
947 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);
949 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
950 if (p_td_thragent_t == 0) {
951 return 0;
952 }
954 td_thrhandle_t thr_handle;
955 if (p_td_ta_map_id2thr(p_td_thragent_t, (thread_t) tid, &thr_handle) != TD_OK) {
956 THROW_NEW_DEBUGGER_EXCEPTION_("can't map thread id to thread handle!", 0);
957 }
959 p_td_thr_getgregs_t p_td_thr_getgregs = (p_td_thr_getgregs_t) env->GetLongField(this_obj, p_td_thr_getgregs_ID);
960 prgregset_t gregs;
961 p_td_thr_getgregs(&thr_handle, gregs);
963 jlongArray res = env->NewLongArray(NPRGREG);
964 CHECK_EXCEPTION_(0);
965 jboolean isCopy;
966 jlong* ptr = env->GetLongArrayElements(res, &isCopy);
967 for (int i = 0; i < NPRGREG; i++) {
968 ptr[i] = (jlong) (uintptr_t) gregs[i];
969 }
970 env->ReleaseLongArrayElements(res, ptr, JNI_COMMIT);
971 return res;
972 }
974 /*
975 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
976 * Method: fillThreadList0
977 * Signature: (Ljava/util/List;)V
978 * Description: fills thread list of the debuggee process/core
979 */
980 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillThreadList0
981 (JNIEnv *env, jobject this_obj, jobject list) {
983 td_thragent_t* p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID);
984 if (p_td_thragent_t == 0) {
985 return;
986 }
988 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);
990 DebuggerWithObject dbgo;
991 dbgo.env = env;
992 dbgo.this_obj = this_obj;
993 dbgo.obj = list;
995 p_td_ta_thr_iter(p_td_thragent_t, fill_thread_list, &dbgo,
996 TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
997 }
999 #ifndef SOLARIS_11_B159_OR_LATER
1000 // building on Nevada-B158 or earlier so more hoops to jump through
1001 static bool has_newer_Pstack_iter = false; // older version by default
1002 #endif
1004 /*
1005 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1006 * Method: fillCFrameList0
1007 * Signature: ([J)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;
1008 * Description: fills CFrame list for a given thread
1009 */
1010 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillCFrameList0
1011 (JNIEnv *env, jobject this_obj, jlongArray regsArray) {
1012 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1014 DebuggerWith2Objects dbgo2;
1015 dbgo2.env = env;
1016 dbgo2.this_obj = this_obj;
1017 dbgo2.obj = NULL;
1018 dbgo2.obj2 = NULL;
1020 jboolean isCopy;
1021 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy);
1022 CHECK_EXCEPTION_(0);
1024 prgregset_t gregs;
1025 for (int i = 0; i < NPRGREG; i++) {
1026 gregs[i] = (uintptr_t) ptr[i];
1027 }
1029 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT);
1030 CHECK_EXCEPTION_(0);
1032 #ifdef SOLARIS_11_B159_OR_LATER
1033 // building on Nevada-B159 or later so use the new callback
1034 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1035 wrapper_fill_cframe_list, &dbgo2);
1036 #else
1037 // building on Nevada-B158 or earlier so figure out which callback to use
1039 if (has_newer_Pstack_iter) {
1040 // Since we're building on Nevada-B158 or earlier, we have to
1041 // cast wrapper_fill_cframe_list to make the compiler happy.
1042 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1043 (proc_stack_f *)wrapper_fill_cframe_list, &dbgo2);
1044 } else {
1045 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs,
1046 fill_cframe_list, &dbgo2);
1047 }
1048 #endif // SOLARIS_11_B159_OR_LATER
1049 return dbgo2.obj;
1050 }
1052 /*
1053 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1054 * Method: fillLoadObjectList0
1055 * Signature: (Ljava/util/List;)V
1056 * Description: fills shared objects of the debuggee process/core
1057 */
1058 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_fillLoadObjectList0
1059 (JNIEnv *env, jobject this_obj, jobject list) {
1060 DebuggerWithObject dbgo;
1061 dbgo.env = env;
1062 dbgo.this_obj = this_obj;
1063 dbgo.obj = list;
1065 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1066 Pobject_iter((struct ps_prochandle*) p_ps_prochandle, fill_load_object_list, &dbgo);
1067 }
1069 /*
1070 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1071 * Method: readBytesFromProcess0
1072 * Signature: (JJ)[B
1073 * Description: read bytes from debuggee process/core
1074 */
1075 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_readBytesFromProcess0
1076 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes) {
1078 jbyteArray array = env->NewByteArray(numBytes);
1079 CHECK_EXCEPTION_(0);
1080 jboolean isCopy;
1081 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy);
1082 CHECK_EXCEPTION_(0);
1084 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1085 ps_err_e ret = ps_pread((struct ps_prochandle*) p_ps_prochandle,
1086 (psaddr_t)address, bufPtr, (size_t)numBytes);
1088 if (ret != PS_OK) {
1089 // part of the class sharing workaround. try shared heap area
1090 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID);
1091 if (classes_jsa_fd != -1 && address != (jlong)0) {
1092 print_debug("read failed at 0x%lx, attempting shared heap area\n", (long) address);
1094 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID);
1095 // walk through the shared mappings -- we just have 4 of them.
1096 // so, linear walking is okay.
1097 for (int m = 0; m < NUM_SHARED_MAPS; m++) {
1099 // We can skip the non-read-only maps. These are mapped as MAP_PRIVATE
1100 // and hence will be read by libproc. Besides, the file copy may be
1101 // stale because the process might have modified those pages.
1102 if (pheader->_space[m]._read_only) {
1103 jlong baseAddress = (jlong) (uintptr_t) pheader->_space[m]._base;
1104 size_t usedSize = pheader->_space[m]._used;
1105 if (address >= baseAddress && address < (baseAddress + usedSize)) {
1106 // the given address falls in this shared heap area
1107 print_debug("found shared map at 0x%lx\n", (long) baseAddress);
1110 // If more data is asked than actually mapped from file, we need to zero fill
1111 // till the end-of-page boundary. But, java array new does that for us. we just
1112 // need to read as much as data available.
1114 #define MIN2(x, y) (((x) < (y))? (x) : (y))
1116 jlong diff = address - baseAddress;
1117 jlong bytesToRead = MIN2(numBytes, usedSize - diff);
1118 off_t offset = pheader->_space[m]._file_offset + off_t(diff);
1119 ssize_t bytesRead = pread(classes_jsa_fd, bufPtr, bytesToRead, offset);
1120 if (bytesRead != bytesToRead) {
1121 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1122 print_debug("shared map read failed\n");
1123 return jbyteArray(0);
1124 } else {
1125 print_debug("shared map read succeeded\n");
1126 env->ReleaseByteArrayElements(array, bufPtr, 0);
1127 return array;
1128 }
1129 } // is in current map
1130 } // is read only map
1131 } // for shared maps
1132 } // classes_jsa_fd != -1
1133 env->ReleaseByteArrayElements(array, bufPtr, JNI_ABORT);
1134 return jbyteArray(0);
1135 } else {
1136 env->ReleaseByteArrayElements(array, bufPtr, 0);
1137 return array;
1138 }
1139 }
1141 /*
1142 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1143 * Method: writeBytesToProcess0
1144 * Signature: (JJ[B)V
1145 * Description: write bytes into debugger process
1146 */
1147 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_writeBytesToProcess0
1148 (JNIEnv *env, jobject this_obj, jlong address, jlong numBytes, jbyteArray data) {
1149 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1150 jboolean isCopy;
1151 jbyte* ptr = env->GetByteArrayElements(data, &isCopy);
1152 CHECK_EXCEPTION;
1154 if (ps_pwrite((struct ps_prochandle*) p_ps_prochandle, address, ptr, numBytes) != PS_OK) {
1155 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1156 THROW_NEW_DEBUGGER_EXCEPTION("Process write failed!");
1157 }
1159 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT);
1160 }
1162 /*
1163 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1164 * Method: suspend0
1165 * Signature: ()V
1166 */
1167 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_suspend0
1168 (JNIEnv *env, jobject this_obj) {
1169 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1170 // for now don't check return value. revisit this again.
1171 Pstop((struct ps_prochandle*) p_ps_prochandle, 1000);
1172 }
1174 /*
1175 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1176 * Method: resume0
1177 * Signature: ()V
1178 */
1179 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_resume0
1180 (JNIEnv *env, jobject this_obj) {
1181 jlong p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1182 // for now don't check return value. revisit this again.
1183 Psetrun((struct ps_prochandle*) p_ps_prochandle, 0, PRCFAULT|PRSTOP);
1184 }
1186 /*
1187 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1188 * Method: lookupByName0
1189 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
1190 * Description: symbol lookup by name
1191 */
1192 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByName0
1193 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
1194 jlong p_ps_prochandle;
1195 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1197 jboolean isCopy;
1198 const char* objectName_cstr = NULL;
1199 if (objectName != NULL) {
1200 objectName_cstr = env->GetStringUTFChars(objectName, &isCopy);
1201 CHECK_EXCEPTION_(0);
1202 } else {
1203 objectName_cstr = PR_OBJ_EVERY;
1204 }
1206 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy);
1207 CHECK_EXCEPTION_(0);
1209 psaddr_t symbol_addr = (psaddr_t) 0;
1210 ps_pglobal_lookup((struct ps_prochandle*) p_ps_prochandle, objectName_cstr,
1211 symbolName_cstr, &symbol_addr);
1213 if (symbol_addr == 0) {
1214 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr);
1215 }
1217 if (objectName_cstr != PR_OBJ_EVERY) {
1218 env->ReleaseStringUTFChars(objectName, objectName_cstr);
1219 }
1220 env->ReleaseStringUTFChars(symbolName, symbolName_cstr);
1221 return (jlong) (uintptr_t) symbol_addr;
1222 }
1224 /*
1225 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1226 * Method: lookupByAddress0
1227 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
1228 * Description: lookup symbol name for a given address
1229 */
1230 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_lookupByAddress0
1231 (JNIEnv *env, jobject this_obj, jlong address) {
1232 jlong p_ps_prochandle;
1233 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID);
1235 char nameBuf[SYMBOL_BUF_SIZE + 1];
1236 GElf_Sym sym;
1237 int res = Plookup_by_addr((struct ps_prochandle*) p_ps_prochandle, (uintptr_t) address,
1238 nameBuf, sizeof(nameBuf), &sym);
1239 if (res != 0) { // failed
1240 return 0;
1241 }
1243 jstring resSym = env->NewStringUTF(nameBuf);
1244 CHECK_EXCEPTION_(0);
1246 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value));
1247 }
1249 /*
1250 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1251 * Method: demangle0
1252 * Signature: (Ljava/lang/String;)Ljava/lang/String;
1253 */
1254 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0
1255 (JNIEnv *env, jobject this_object, jstring name) {
1256 jboolean isCopy;
1257 const char* ptr = env->GetStringUTFChars(name, &isCopy);
1258 char buf[2*SYMBOL_BUF_SIZE + 1];
1259 jstring res = 0;
1260 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) {
1261 res = env->NewStringUTF(buf);
1262 } else {
1263 res = name;
1264 }
1265 env->ReleaseStringUTFChars(name, ptr);
1266 return res;
1267 }
1269 #ifndef SOLARIS_11_B159_OR_LATER
1270 // Determine if the OS we're running on has the newer version
1271 // of libproc's Pstack_iter.
1272 //
1273 // Set env var PSTACK_ITER_DEBUG=true to debug this logic.
1274 // Set env var PSTACK_ITER_DEBUG_RELEASE to simulate a 'release' value.
1275 // Set env var PSTACK_ITER_DEBUG_VERSION to simulate a 'version' value.
1276 //
1277 // frankenputer 'uname -r -v': 5.10 Generic_141445-09
1278 // jurassic 'uname -r -v': 5.11 snv_164
1279 // lonepeak 'uname -r -v': 5.11 snv_127
1280 //
1281 static void set_has_newer_Pstack_iter(JNIEnv *env) {
1282 static bool done_set = false;
1284 if (done_set) {
1285 // already set has_newer_Pstack_iter
1286 return;
1287 }
1289 struct utsname name;
1290 if (uname(&name) == -1) {
1291 THROW_NEW_DEBUGGER_EXCEPTION("uname() failed!");
1292 }
1293 dprintf_2("release='%s' version='%s'\n", name.release, name.version);
1295 if (_Pstack_iter_debug) {
1296 char *override = getenv("PSTACK_ITER_DEBUG_RELEASE");
1297 if (override != NULL) {
1298 strncpy(name.release, override, SYS_NMLN - 1);
1299 name.release[SYS_NMLN - 2] = '\0';
1300 dprintf_2("overriding with release='%s'\n", name.release);
1301 }
1302 override = getenv("PSTACK_ITER_DEBUG_VERSION");
1303 if (override != NULL) {
1304 strncpy(name.version, override, SYS_NMLN - 1);
1305 name.version[SYS_NMLN - 2] = '\0';
1306 dprintf_2("overriding with version='%s'\n", name.version);
1307 }
1308 }
1310 // the major number corresponds to the old SunOS major number
1311 int major = atoi(name.release);
1312 if (major >= 6) {
1313 dprintf_2("release is SunOS 6 or later\n");
1314 has_newer_Pstack_iter = true;
1315 done_set = true;
1316 return;
1317 }
1318 if (major < 5) {
1319 dprintf_2("release is SunOS 4 or earlier\n");
1320 done_set = true;
1321 return;
1322 }
1324 // some SunOS 5.* build so now check for Solaris versions
1325 char *dot = strchr(name.release, '.');
1326 int minor = 0;
1327 if (dot != NULL) {
1328 // release is major.minor format
1329 *dot = NULL;
1330 minor = atoi(dot + 1);
1331 }
1333 if (minor <= 10) {
1334 dprintf_2("release is Solaris 10 or earlier\n");
1335 done_set = true;
1336 return;
1337 } else if (minor >= 12) {
1338 dprintf_2("release is Solaris 12 or later\n");
1339 has_newer_Pstack_iter = true;
1340 done_set = true;
1341 return;
1342 }
1344 // some Solaris 11 build so now check for internal build numbers
1345 if (strncmp(name.version, "snv_", 4) != 0) {
1346 dprintf_2("release is Solaris 11 post-GA or later\n");
1347 has_newer_Pstack_iter = true;
1348 done_set = true;
1349 return;
1350 }
1352 // version begins with "snv_" so a pre-GA build of Solaris 11
1353 int build = atoi(&name.version[4]);
1354 if (build >= 159) {
1355 dprintf_2("release is Nevada-B159 or later\n");
1356 has_newer_Pstack_iter = true;
1357 } else {
1358 dprintf_2("release is Nevada-B158 or earlier\n");
1359 }
1361 done_set = true;
1362 }
1363 #endif // !SOLARIS_11_B159_OR_LATER
1365 /*
1366 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal
1367 * Method: initIDs
1368 * Signature: ()V
1369 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class
1370 */
1371 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs
1372 (JNIEnv *env, jclass clazz) {
1373 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL;
1374 if (_libsaproc_debug) {
1375 // propagate debug mode to libproc.so
1376 static const char* var = "LIBPROC_DEBUG=1";
1377 putenv((char*)var);
1378 }
1380 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL);
1381 if (libproc_handle == 0)
1382 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!");
1384 #ifndef SOLARIS_11_B159_OR_LATER
1385 _Pstack_iter_debug = getenv("PSTACK_ITER_DEBUG") != NULL;
1387 set_has_newer_Pstack_iter(env);
1388 CHECK_EXCEPTION;
1389 dprintf_2("has_newer_Pstack_iter=%d\n", has_newer_Pstack_iter);
1390 #endif
1392 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J");
1393 CHECK_EXCEPTION;
1395 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J");
1396 CHECK_EXCEPTION;
1398 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J");
1399 CHECK_EXCEPTION;
1401 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J");
1402 CHECK_EXCEPTION;
1404 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J");
1405 CHECK_EXCEPTION;
1407 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J");
1408 CHECK_EXCEPTION;
1410 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J");
1411 CHECK_EXCEPTION;
1413 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J");
1414 CHECK_EXCEPTION;
1416 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J");
1417 CHECK_EXCEPTION;
1419 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J");
1420 CHECK_EXCEPTION;
1422 getThreadForThreadId_ID = env->GetMethodID(clazz,
1423 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
1424 CHECK_EXCEPTION;
1426 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I");
1427 CHECK_EXCEPTION;
1429 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I");
1430 CHECK_EXCEPTION;
1432 createSenderFrame_ID = env->GetMethodID(clazz,
1433 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;");
1434 CHECK_EXCEPTION;
1436 createLoadObject_ID = env->GetMethodID(clazz,
1437 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
1438 CHECK_EXCEPTION;
1440 createClosestSymbol_ID = env->GetMethodID(clazz,
1441 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
1442 CHECK_EXCEPTION;
1444 listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z");
1445 CHECK_EXCEPTION;
1447 // part of the class sharing workaround
1448 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I");
1449 CHECK_EXCEPTION;
1450 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J");
1451 CHECK_EXCEPTION;
1452 }