Mercurial > hg > truffle
annotate agent/src/os/solaris/proc/saproc.cpp @ 4059:44ce519bc3d1
7104960: JSR 292: +VerifyMethodHandles in product JVM can overflow buffer
Reviewed-by: kvn, jrose, twisti
author | never |
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date | Tue, 08 Nov 2011 10:31:53 -0800 |
parents | 405c634f4aaa |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "salibproc.h" | |
26 #include "sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal.h" | |
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27 #ifndef SOLARIS_11_B159_OR_LATER |
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28 #include <sys/utsname.h> |
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29 #endif |
0 | 30 #include <thread_db.h> |
31 #include <strings.h> | |
32 #include <limits.h> | |
33 #include <demangle.h> | |
34 #include <stdarg.h> | |
35 #include <stdlib.h> | |
36 #include <errno.h> | |
37 | |
38 #define CHECK_EXCEPTION_(value) if(env->ExceptionOccurred()) { return value; } | |
39 #define CHECK_EXCEPTION if(env->ExceptionOccurred()) { return;} | |
40 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throwNewDebuggerException(env, str); return value; } | |
41 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throwNewDebuggerException(env, str); return;} | |
42 | |
43 #define SYMBOL_BUF_SIZE 256 | |
44 #define ERR_MSG_SIZE (PATH_MAX + 256) | |
45 | |
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46 // debug modes |
0 | 47 static int _libsaproc_debug = 0; |
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48 #ifndef SOLARIS_11_B159_OR_LATER |
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49 static bool _Pstack_iter_debug = false; |
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50 |
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51 static void dprintf_2(const char* format,...) { |
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52 if (_Pstack_iter_debug) { |
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53 va_list alist; |
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54 |
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55 va_start(alist, format); |
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56 fputs("Pstack_iter DEBUG: ", stderr); |
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57 vfprintf(stderr, format, alist); |
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58 va_end(alist); |
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59 } |
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60 } |
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61 #endif // !SOLARIS_11_B159_OR_LATER |
0 | 62 |
63 static void print_debug(const char* format,...) { | |
64 if (_libsaproc_debug) { | |
65 va_list alist; | |
66 | |
67 va_start(alist, format); | |
68 fputs("libsaproc DEBUG: ", stderr); | |
69 vfprintf(stderr, format, alist); | |
70 va_end(alist); | |
71 } | |
72 } | |
73 | |
74 struct Debugger { | |
75 JNIEnv* env; | |
76 jobject this_obj; | |
77 }; | |
78 | |
79 struct DebuggerWithObject : Debugger { | |
80 jobject obj; | |
81 }; | |
82 | |
83 struct DebuggerWith2Objects : DebuggerWithObject { | |
84 jobject obj2; | |
85 }; | |
86 | |
87 /* | |
88 * Portions of user thread level detail gathering code is from pstack source | |
89 * code. See pstack.c in Solaris 2.8 user commands source code. | |
90 */ | |
91 | |
92 static void throwNewDebuggerException(JNIEnv* env, const char* errMsg) { | |
93 env->ThrowNew(env->FindClass("sun/jvm/hotspot/debugger/DebuggerException"), errMsg); | |
94 } | |
95 | |
96 // JNI ids for some fields, methods | |
97 | |
98 // libproc handler pointer | |
99 static jfieldID p_ps_prochandle_ID = 0; | |
100 | |
101 // libthread.so dlopen handle, thread agent ptr and function pointers | |
102 static jfieldID libthread_db_handle_ID = 0; | |
103 static jfieldID p_td_thragent_t_ID = 0; | |
104 static jfieldID p_td_init_ID = 0; | |
105 static jfieldID p_td_ta_new_ID = 0; | |
106 static jfieldID p_td_ta_delete_ID = 0; | |
107 static jfieldID p_td_ta_thr_iter_ID = 0; | |
108 static jfieldID p_td_thr_get_info_ID = 0; | |
109 static jfieldID p_td_ta_map_id2thr_ID = 0; | |
110 static jfieldID p_td_thr_getgregs_ID = 0; | |
111 | |
112 // reg index fields | |
113 static jfieldID pcRegIndex_ID = 0; | |
114 static jfieldID fpRegIndex_ID = 0; | |
115 | |
116 // part of the class sharing workaround | |
117 static jfieldID classes_jsa_fd_ID = 0; | |
118 static jfieldID p_file_map_header_ID = 0; | |
119 | |
120 // method ids | |
121 | |
122 static jmethodID getThreadForThreadId_ID = 0; | |
123 static jmethodID createSenderFrame_ID = 0; | |
124 static jmethodID createLoadObject_ID = 0; | |
125 static jmethodID createClosestSymbol_ID = 0; | |
126 static jmethodID listAdd_ID = 0; | |
127 | |
128 /* | |
129 * Functions we need from libthread_db | |
130 */ | |
131 typedef td_err_e | |
132 (*p_td_init_t)(void); | |
133 typedef td_err_e | |
134 (*p_td_ta_new_t)(void *, td_thragent_t **); | |
135 typedef td_err_e | |
136 (*p_td_ta_delete_t)(td_thragent_t *); | |
137 typedef td_err_e | |
138 (*p_td_ta_thr_iter_t)(const td_thragent_t *, td_thr_iter_f *, void *, | |
139 td_thr_state_e, int, sigset_t *, unsigned); | |
140 typedef td_err_e | |
141 (*p_td_thr_get_info_t)(const td_thrhandle_t *, td_thrinfo_t *); | |
142 typedef td_err_e | |
143 (*p_td_ta_map_id2thr_t)(const td_thragent_t *, thread_t, td_thrhandle_t *); | |
144 typedef td_err_e | |
145 (*p_td_thr_getgregs_t)(const td_thrhandle_t *, prgregset_t); | |
146 | |
147 static void | |
148 clear_libthread_db_ptrs(JNIEnv* env, jobject this_obj) { | |
149 // release libthread_db agent, if we had created | |
150 p_td_ta_delete_t p_td_ta_delete = 0; | |
151 p_td_ta_delete = (p_td_ta_delete_t) env->GetLongField(this_obj, p_td_ta_delete_ID); | |
152 | |
153 td_thragent_t *p_td_thragent_t = 0; | |
154 p_td_thragent_t = (td_thragent_t*) env->GetLongField(this_obj, p_td_thragent_t_ID); | |
155 if (p_td_thragent_t != 0 && p_td_ta_delete != 0) { | |
156 p_td_ta_delete(p_td_thragent_t); | |
157 } | |
158 | |
159 // dlclose libthread_db.so | |
160 void* libthread_db_handle = (void*) env->GetLongField(this_obj, libthread_db_handle_ID); | |
161 if (libthread_db_handle != 0) { | |
162 dlclose(libthread_db_handle); | |
163 } | |
164 | |
165 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)0); | |
166 env->SetLongField(this_obj, p_td_init_ID, (jlong)0); | |
167 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)0); | |
168 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)0); | |
169 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)0); | |
170 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)0); | |
171 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)0); | |
172 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)0); | |
173 } | |
174 | |
175 | |
176 static void detach_internal(JNIEnv* env, jobject this_obj) { | |
177 // clear libthread_db stuff | |
178 clear_libthread_db_ptrs(env, this_obj); | |
179 | |
180 // release ptr to ps_prochandle | |
181 jlong p_ps_prochandle; | |
182 p_ps_prochandle = env->GetLongField(this_obj, p_ps_prochandle_ID); | |
183 if (p_ps_prochandle != 0L) { | |
184 Prelease((struct ps_prochandle*) p_ps_prochandle, PRELEASE_CLEAR); | |
185 } | |
186 | |
187 // part of the class sharing workaround | |
188 int classes_jsa_fd = env->GetIntField(this_obj, classes_jsa_fd_ID); | |
189 if (classes_jsa_fd != -1) { | |
190 close(classes_jsa_fd); | |
191 struct FileMapHeader* pheader = (struct FileMapHeader*) env->GetLongField(this_obj, p_file_map_header_ID); | |
192 if (pheader != NULL) { | |
193 free(pheader); | |
194 } | |
195 } | |
196 } | |
197 | |
198 // Is it okay to ignore libthread_db failure? Set env var to ignore | |
199 // libthread_db failure. You can still debug, but will miss threads | |
200 // related functionality. | |
201 static bool sa_ignore_threaddb = (getenv("SA_IGNORE_THREADDB") != 0); | |
202 | |
203 #define HANDLE_THREADDB_FAILURE(msg) \ | |
204 if (sa_ignore_threaddb) { \ | |
205 printf("libsaproc WARNING: %s\n", msg); \ | |
206 return; \ | |
207 } else { \ | |
208 THROW_NEW_DEBUGGER_EXCEPTION(msg); \ | |
209 } | |
210 | |
211 #define HANDLE_THREADDB_FAILURE_(msg, ret) \ | |
212 if (sa_ignore_threaddb) { \ | |
213 printf("libsaproc WARNING: %s\n", msg); \ | |
214 return ret; \ | |
215 } else { \ | |
216 THROW_NEW_DEBUGGER_EXCEPTION_(msg, ret); \ | |
217 } | |
218 | |
219 static const char * alt_root = NULL; | |
220 static int alt_root_len = -1; | |
221 | |
222 #define SA_ALTROOT "SA_ALTROOT" | |
223 | |
224 static void init_alt_root() { | |
225 if (alt_root_len == -1) { | |
226 alt_root = getenv(SA_ALTROOT); | |
227 if (alt_root) | |
228 alt_root_len = strlen(alt_root); | |
229 else | |
230 alt_root_len = 0; | |
231 } | |
232 } | |
233 | |
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234 // This function is a complete substitute for the open system call |
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235 // since it's also used to override open calls from libproc to |
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236 // implement as a pathmap style facility for the SA. If libproc |
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237 // starts using other interfaces then this might have to extended to |
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238 // cover other calls. |
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239 extern "C" int libsaproc_open(const char * name, int oflag, ...) { |
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240 if (oflag == O_RDONLY) { |
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241 init_alt_root(); |
0 | 242 |
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243 if (_libsaproc_debug) { |
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244 printf("libsaproc DEBUG: libsaproc_open %s\n", name); |
0 | 245 } |
246 | |
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247 if (alt_root_len > 0) { |
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248 int fd = -1; |
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249 char alt_path[PATH_MAX+1]; |
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250 |
0 | 251 strcpy(alt_path, alt_root); |
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252 strcat(alt_path, name); |
0 | 253 fd = open(alt_path, O_RDONLY); |
254 if (fd >= 0) { | |
255 if (_libsaproc_debug) { | |
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256 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path); |
0 | 257 } |
258 return fd; | |
259 } | |
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260 |
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261 if (strrchr(name, '/')) { |
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262 strcpy(alt_path, alt_root); |
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263 strcat(alt_path, strrchr(name, '/')); |
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264 fd = open(alt_path, O_RDONLY); |
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265 if (fd >= 0) { |
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266 if (_libsaproc_debug) { |
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267 printf("libsaproc DEBUG: libsaproc_open substituted %s\n", alt_path); |
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268 } |
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269 return fd; |
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270 } |
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271 } |
0 | 272 } |
273 } | |
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274 |
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275 { |
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276 mode_t mode; |
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277 va_list ap; |
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278 va_start(ap, oflag); |
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279 mode = va_arg(ap, mode_t); |
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280 va_end(ap); |
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281 |
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282 return open(name, oflag, mode); |
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283 } |
0 | 284 } |
285 | |
286 | |
287 static void * pathmap_dlopen(const char * name, int mode) { | |
288 init_alt_root(); | |
289 | |
290 if (_libsaproc_debug) { | |
291 printf("libsaproc DEBUG: pathmap_dlopen %s\n", name); | |
292 } | |
293 | |
294 void * handle = NULL; | |
295 if (alt_root_len > 0) { | |
296 char alt_path[PATH_MAX+1]; | |
297 strcpy(alt_path, alt_root); | |
298 strcat(alt_path, name); | |
299 handle = dlopen(alt_path, mode); | |
300 if (_libsaproc_debug && handle) { | |
301 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path); | |
302 } | |
303 | |
304 if (handle == NULL && strrchr(name, '/')) { | |
305 strcpy(alt_path, alt_root); | |
306 strcat(alt_path, strrchr(name, '/')); | |
307 handle = dlopen(alt_path, mode); | |
308 if (_libsaproc_debug && handle) { | |
309 printf("libsaproc DEBUG: pathmap_dlopen substituted %s\n", alt_path); | |
310 } | |
311 } | |
312 } | |
313 if (handle == NULL) { | |
314 handle = dlopen(name, mode); | |
315 } | |
316 if (_libsaproc_debug) { | |
317 printf("libsaproc DEBUG: pathmap_dlopen %s return 0x%x\n", name, handle); | |
318 } | |
319 return handle; | |
320 } | |
321 | |
322 // libproc and libthread_db callback functions | |
323 | |
324 extern "C" { | |
325 | |
326 static int | |
327 init_libthread_db_ptrs(void *cd, const prmap_t *pmp, const char *object_name) { | |
328 Debugger* dbg = (Debugger*) cd; | |
329 JNIEnv* env = dbg->env; | |
330 jobject this_obj = dbg->this_obj; | |
331 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID); | |
332 | |
333 char *s1 = 0, *s2 = 0; | |
334 char libthread_db[PATH_MAX]; | |
335 | |
336 if (strstr(object_name, "/libthread.so.") == NULL) | |
337 return (0); | |
338 | |
339 /* | |
340 * We found a libthread. | |
341 * dlopen() the matching libthread_db and get the thread agent handle. | |
342 */ | |
343 if (Pstatus(ph)->pr_dmodel == PR_MODEL_NATIVE) { | |
344 (void) strcpy(libthread_db, object_name); | |
345 s1 = (char*) strstr(object_name, ".so."); | |
346 s2 = (char*) strstr(libthread_db, ".so."); | |
347 (void) strcpy(s2, "_db"); | |
348 s2 += 3; | |
349 (void) strcpy(s2, s1); | |
350 } else { | |
351 #ifdef _LP64 | |
352 /* | |
353 * The victim process is 32-bit, we are 64-bit. | |
354 * We have to find the 64-bit version of libthread_db | |
355 * that matches the victim's 32-bit version of libthread. | |
356 */ | |
357 (void) strcpy(libthread_db, object_name); | |
358 s1 = (char*) strstr(object_name, "/libthread.so."); | |
359 s2 = (char*) strstr(libthread_db, "/libthread.so."); | |
360 (void) strcpy(s2, "/64"); | |
361 s2 += 3; | |
362 (void) strcpy(s2, s1); | |
363 s1 = (char*) strstr(s1, ".so."); | |
364 s2 = (char*) strstr(s2, ".so."); | |
365 (void) strcpy(s2, "_db"); | |
366 s2 += 3; | |
367 (void) strcpy(s2, s1); | |
368 #else | |
369 return (0); | |
370 #endif /* _LP64 */ | |
371 } | |
372 | |
373 void* libthread_db_handle = 0; | |
374 if ((libthread_db_handle = pathmap_dlopen(libthread_db, RTLD_LAZY|RTLD_LOCAL)) == NULL) { | |
375 char errMsg[PATH_MAX + 256]; | |
376 sprintf(errMsg, "Can't load %s!", libthread_db); | |
377 HANDLE_THREADDB_FAILURE_(errMsg, 0); | |
378 } | |
379 env->SetLongField(this_obj, libthread_db_handle_ID, (jlong)(uintptr_t)libthread_db_handle); | |
380 | |
381 void* tmpPtr = 0; | |
382 tmpPtr = dlsym(libthread_db_handle, "td_init"); | |
383 if (tmpPtr == 0) { | |
384 HANDLE_THREADDB_FAILURE_("dlsym failed on td_init!", 0); | |
385 } | |
386 env->SetLongField(this_obj, p_td_init_ID, (jlong)(uintptr_t) tmpPtr); | |
387 | |
388 tmpPtr =dlsym(libthread_db_handle, "td_ta_new"); | |
389 if (tmpPtr == 0) { | |
390 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_new!", 0); | |
391 } | |
392 env->SetLongField(this_obj, p_td_ta_new_ID, (jlong)(uintptr_t) tmpPtr); | |
393 | |
394 tmpPtr = dlsym(libthread_db_handle, "td_ta_delete"); | |
395 if (tmpPtr == 0) { | |
396 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_delete!", 0); | |
397 } | |
398 env->SetLongField(this_obj, p_td_ta_delete_ID, (jlong)(uintptr_t) tmpPtr); | |
399 | |
400 tmpPtr = dlsym(libthread_db_handle, "td_ta_thr_iter"); | |
401 if (tmpPtr == 0) { | |
402 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_thr_iter!", 0); | |
403 } | |
404 env->SetLongField(this_obj, p_td_ta_thr_iter_ID, (jlong)(uintptr_t) tmpPtr); | |
405 | |
406 tmpPtr = dlsym(libthread_db_handle, "td_thr_get_info"); | |
407 if (tmpPtr == 0) { | |
408 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_get_info!", 0); | |
409 } | |
410 env->SetLongField(this_obj, p_td_thr_get_info_ID, (jlong)(uintptr_t) tmpPtr); | |
411 | |
412 tmpPtr = dlsym(libthread_db_handle, "td_ta_map_id2thr"); | |
413 if (tmpPtr == 0) { | |
414 HANDLE_THREADDB_FAILURE_("dlsym failed on td_ta_map_id2thr!", 0); | |
415 } | |
416 env->SetLongField(this_obj, p_td_ta_map_id2thr_ID, (jlong)(uintptr_t) tmpPtr); | |
417 | |
418 tmpPtr = dlsym(libthread_db_handle, "td_thr_getgregs"); | |
419 if (tmpPtr == 0) { | |
420 HANDLE_THREADDB_FAILURE_("dlsym failed on td_thr_getgregs!", 0); | |
421 } | |
422 env->SetLongField(this_obj, p_td_thr_getgregs_ID, (jlong)(uintptr_t) tmpPtr); | |
423 | |
424 return 1; | |
425 } | |
426 | |
427 static int | |
428 fill_thread_list(const td_thrhandle_t *p_td_thragent_t, void* cd) { | |
429 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd; | |
430 JNIEnv* env = dbgo->env; | |
431 jobject this_obj = dbgo->this_obj; | |
432 jobject list = dbgo->obj; | |
433 | |
434 td_thrinfo_t thrinfo; | |
435 p_td_thr_get_info_t p_td_thr_get_info = (p_td_thr_get_info_t) env->GetLongField(this_obj, p_td_thr_get_info_ID); | |
436 | |
437 if (p_td_thr_get_info(p_td_thragent_t, &thrinfo) != TD_OK) | |
438 return (0); | |
439 | |
440 jobject threadProxy = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)(uintptr_t) thrinfo.ti_tid); | |
441 CHECK_EXCEPTION_(1); | |
442 env->CallBooleanMethod(list, listAdd_ID, threadProxy); | |
443 CHECK_EXCEPTION_(1); | |
444 return 0; | |
445 } | |
446 | |
447 static int | |
448 fill_load_object_list(void *cd, const prmap_t* pmp, const char* obj_name) { | |
449 | |
450 if (obj_name) { | |
451 DebuggerWithObject* dbgo = (DebuggerWithObject*) cd; | |
452 JNIEnv* env = dbgo->env; | |
453 jobject this_obj = dbgo->this_obj; | |
454 jobject list = dbgo->obj; | |
455 | |
456 jstring objectName = env->NewStringUTF(obj_name); | |
457 CHECK_EXCEPTION_(1); | |
458 | |
459 jlong mapSize = (jlong) pmp->pr_size; | |
460 jobject sharedObject = env->CallObjectMethod(this_obj, createLoadObject_ID, | |
461 objectName, mapSize, (jlong)(uintptr_t)pmp->pr_vaddr); | |
462 CHECK_EXCEPTION_(1); | |
463 env->CallBooleanMethod(list, listAdd_ID, sharedObject); | |
464 CHECK_EXCEPTION_(1); | |
465 } | |
466 | |
467 return 0; | |
468 } | |
469 | |
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470 // Pstack_iter() proc_stack_f callback prior to Nevada-B159 |
0 | 471 static int |
472 fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, const long *argv) { | |
473 DebuggerWith2Objects* dbgo2 = (DebuggerWith2Objects*) cd; | |
474 JNIEnv* env = dbgo2->env; | |
475 jobject this_obj = dbgo2->this_obj; | |
476 jobject curFrame = dbgo2->obj2; | |
477 | |
478 jint pcRegIndex = env->GetIntField(this_obj, pcRegIndex_ID); | |
479 jint fpRegIndex = env->GetIntField(this_obj, fpRegIndex_ID); | |
480 | |
481 jlong pc = (jlong) (uintptr_t) regs[pcRegIndex]; | |
482 jlong fp = (jlong) (uintptr_t) regs[fpRegIndex]; | |
483 | |
484 dbgo2->obj2 = env->CallObjectMethod(this_obj, createSenderFrame_ID, | |
485 curFrame, pc, fp); | |
486 CHECK_EXCEPTION_(1); | |
487 if (dbgo2->obj == 0) { | |
488 dbgo2->obj = dbgo2->obj2; | |
489 } | |
490 return 0; | |
491 } | |
492 | |
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493 // Pstack_iter() proc_stack_f callback in Nevada-B159 or later |
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494 /*ARGSUSED*/ |
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495 static int |
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496 wrapper_fill_cframe_list(void *cd, const prgregset_t regs, uint_t argc, |
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497 const long *argv, int frame_flags, int sig) { |
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498 return(fill_cframe_list(cd, regs, argc, argv)); |
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499 } |
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500 |
0 | 501 // part of the class sharing workaround |
502 | |
503 // FIXME: !!HACK ALERT!! | |
504 | |
505 // The format of sharing achive file header is needed to read shared heap | |
506 // file mappings. For now, I am hard coding portion of FileMapHeader here. | |
507 // Refer to filemap.hpp. | |
508 | |
509 // FileMapHeader describes the shared space data in the file to be | |
510 // mapped. This structure gets written to a file. It is not a class, so | |
511 // that the compilers don't add any compiler-private data to it. | |
512 | |
513 // Refer to CompactingPermGenGen::n_regions in compactingPermGenGen.hpp | |
514 const int NUM_SHARED_MAPS = 4; | |
515 | |
516 // Refer to FileMapInfo::_current_version in filemap.hpp | |
517 const int CURRENT_ARCHIVE_VERSION = 1; | |
518 | |
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 | |
523 | |
524 | |
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 | |
530 | |
531 bool _read_only; // read only space? | |
532 bool _allow_exec; // executable code in space? | |
533 | |
534 } _space[NUM_SHARED_MAPS]; // was _space[CompactingPermGenGen::n_regions]; | |
535 | |
536 // Ignore the rest of the FileMapHeader. We don't need those fields here. | |
537 }; | |
538 | |
539 static bool | |
529
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540 read_jboolean(struct ps_prochandle* ph, psaddr_t addr, jboolean* pvalue) { |
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541 jboolean i; |
0 | 542 if (ps_pread(ph, addr, &i, sizeof(i)) == PS_OK) { |
543 *pvalue = i; | |
544 return true; | |
545 } else { | |
546 return false; | |
547 } | |
548 } | |
549 | |
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 } | |
560 | |
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; | |
565 | |
566 while (ch != '\0') { | |
567 if (ps_pread(ph, addr, &ch, sizeof(ch)) != PS_OK) | |
568 return false; | |
569 | |
570 if (i < size - 1) { | |
571 buf[i] = ch; | |
572 } else { // smaller buffer | |
573 return false; | |
574 } | |
575 | |
576 i++; addr++; | |
577 } | |
578 | |
579 buf[i] = '\0'; | |
580 return true; | |
581 } | |
582 | |
583 #define USE_SHARED_SPACES_SYM "UseSharedSpaces" | |
584 // mangled symbol name for Arguments::SharedArchivePath | |
585 #define SHARED_ARCHIVE_PATH_SYM "__1cJArgumentsRSharedArchivePath_" | |
586 | |
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 } | |
599 | |
600 struct ps_prochandle* ph = (struct ps_prochandle*) env->GetLongField(this_obj, p_ps_prochandle_ID); | |
601 | |
602 // initialize classes[_g].jsa file descriptor field. | |
603 dbg->env->SetIntField(this_obj, classes_jsa_fd_ID, -1); | |
604 | |
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 } | |
611 | |
612 // read the value of the flag "UseSharedSpaces" | |
529
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613 // Since hotspot types are not available to build this library. So |
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614 // equivalent type "jboolean" is used to read the value of "UseSharedSpaces" |
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615 // which is same as hotspot type "bool". |
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616 jboolean value = 0; |
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617 if (read_jboolean(ph, useSharedSpacesAddr, &value) != true) { |
0 | 618 THROW_NEW_DEBUGGER_EXCEPTION_("can't read 'UseSharedSpaces' flag", 1); |
529
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619 } else if ((int)value == 0) { |
0 | 620 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n"); |
621 return 1; | |
622 } | |
623 | |
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 } | |
631 | |
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 } | |
637 | |
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 } | |
642 | |
643 print_debug("looking for %s\n", classes_jsa); | |
644 | |
645 // open the classes[_g].jsa | |
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646 int fd = libsaproc_open(classes_jsa, O_RDONLY); |
0 | 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 } | |
654 | |
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 } | |
661 | |
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 } | |
672 | |
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 } | |
682 | |
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 } | |
692 | |
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 } | |
700 | |
701 // FIXME: For now, omitting other checks such as VM version etc. | |
702 | |
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 } | |
708 | |
709 } // extern "C" | |
710 | |
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 }; | |
731 | |
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; | |
737 | |
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 | |
758 | |
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 } | |
778 | |
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 | |
792 | |
793 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(uintptr_t)ph); | |
794 | |
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 } | |
814 | |
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 } | |
830 | |
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 } | |
839 | |
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 } | |
846 | |
847 p_td_ta_new_t p_td_ta_new = (p_td_ta_new_t) env->GetLongField(this_obj, p_td_ta_new_ID); | |
848 | |
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); | |
857 | |
858 } | |
859 | |
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 } | |
870 | |
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 } | |
882 | |
883 | |
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 } | |
894 | |
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 } | |
910 | |
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) { | |
919 | |
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! | |
923 | |
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(); | |
930 | |
931 So even though core may have been generated with a different page size settings, for now | |
932 call getpagesize. | |
933 */ | |
934 | |
935 return getpagesize(); | |
936 } | |
937 | |
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); | |
948 | |
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 } | |
953 | |
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 } | |
958 | |
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); | |
962 | |
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 } | |
973 | |
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) { | |
982 | |
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 } | |
987 | |
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); | |
989 | |
990 DebuggerWithObject dbgo; | |
991 dbgo.env = env; | |
992 dbgo.this_obj = this_obj; | |
993 dbgo.obj = list; | |
994 | |
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 } | |
998 | |
3306
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999 #ifndef SOLARIS_11_B159_OR_LATER |
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1000 // building on Nevada-B158 or earlier so more hoops to jump through |
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1001 static bool has_newer_Pstack_iter = false; // older version by default |
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1002 #endif |
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1003 |
0 | 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); | |
1013 | |
1014 DebuggerWith2Objects dbgo2; | |
1015 dbgo2.env = env; | |
1016 dbgo2.this_obj = this_obj; | |
1017 dbgo2.obj = NULL; | |
1018 dbgo2.obj2 = NULL; | |
1019 | |
1020 jboolean isCopy; | |
1021 jlong* ptr = env->GetLongArrayElements(regsArray, &isCopy); | |
1022 CHECK_EXCEPTION_(0); | |
1023 | |
1024 prgregset_t gregs; | |
1025 for (int i = 0; i < NPRGREG; i++) { | |
1026 gregs[i] = (uintptr_t) ptr[i]; | |
1027 } | |
1028 | |
1029 env->ReleaseLongArrayElements(regsArray, ptr, JNI_ABORT); | |
1030 CHECK_EXCEPTION_(0); | |
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1031 |
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1032 #ifdef SOLARIS_11_B159_OR_LATER |
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1033 // building on Nevada-B159 or later so use the new callback |
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1034 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, |
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1035 wrapper_fill_cframe_list, &dbgo2); |
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1036 #else |
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1037 // building on Nevada-B158 or earlier so figure out which callback to use |
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1038 |
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1039 if (has_newer_Pstack_iter) { |
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1040 // Since we're building on Nevada-B158 or earlier, we have to |
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1041 // cast wrapper_fill_cframe_list to make the compiler happy. |
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1042 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, |
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1043 (proc_stack_f *)wrapper_fill_cframe_list, &dbgo2); |
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1044 } else { |
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1045 Pstack_iter((struct ps_prochandle*) p_ps_prochandle, gregs, |
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1046 fill_cframe_list, &dbgo2); |
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1047 } |
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1048 #endif // SOLARIS_11_B159_OR_LATER |
0 | 1049 return dbgo2.obj; |
1050 } | |
1051 | |
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; | |
1064 | |
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 } | |
1068 | |
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) { | |
1077 | |
1078 jbyteArray array = env->NewByteArray(numBytes); | |
1079 CHECK_EXCEPTION_(0); | |
1080 jboolean isCopy; | |
1081 jbyte* bufPtr = env->GetByteArrayElements(array, &isCopy); | |
1082 CHECK_EXCEPTION_(0); | |
1083 | |
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); | |
1087 | |
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); | |
1093 | |
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++) { | |
1098 | |
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); | |
1108 | |
1109 | |
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. | |
1113 | |
1114 #define MIN2(x, y) (((x) < (y))? (x) : (y)) | |
1115 | |
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 } | |
1140 | |
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; | |
1153 | |
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 } | |
1158 | |
1159 env->ReleaseByteArrayElements(data, ptr, JNI_ABORT); | |
1160 } | |
1161 | |
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 } | |
1173 | |
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 } | |
1185 | |
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); | |
1196 | |
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 } | |
1205 | |
1206 const char* symbolName_cstr = env->GetStringUTFChars(symbolName, &isCopy); | |
1207 CHECK_EXCEPTION_(0); | |
1208 | |
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); | |
1212 | |
1213 if (symbol_addr == 0) { | |
1214 print_debug("lookup for %s in %s failed\n", symbolName_cstr, objectName_cstr); | |
1215 } | |
1216 | |
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 } | |
1223 | |
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); | |
1234 | |
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 } | |
1242 | |
1243 jstring resSym = env->NewStringUTF(nameBuf); | |
1244 CHECK_EXCEPTION_(0); | |
1245 | |
1246 return env->CallObjectMethod(this_obj, createClosestSymbol_ID, resSym, (address - sym.st_value)); | |
1247 } | |
1248 | |
1249 /* | |
1250 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal | |
1251 * Method: demangle0 | |
1252 * Signature: (Ljava/lang/String;)Ljava/lang/String; | |
1253 */ | |
1254 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_demangle0 | |
1255 (JNIEnv *env, jobject this_object, jstring name) { | |
1256 jboolean isCopy; | |
1257 const char* ptr = env->GetStringUTFChars(name, &isCopy); | |
1258 char buf[2*SYMBOL_BUF_SIZE + 1]; | |
1259 jstring res = 0; | |
1260 if (cplus_demangle((char*) ptr, buf, sizeof(buf)) != DEMANGLE_ESPACE) { | |
1261 res = env->NewStringUTF(buf); | |
1262 } else { | |
1263 res = name; | |
1264 } | |
1265 env->ReleaseStringUTFChars(name, ptr); | |
1266 return res; | |
1267 } | |
1268 | |
3306
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1269 #ifndef SOLARIS_11_B159_OR_LATER |
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1270 // Determine if the OS we're running on has the newer version |
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1271 // of libproc's Pstack_iter. |
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|
1272 // |
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|
1273 // Set env var PSTACK_ITER_DEBUG=true to debug this logic. |
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|
1274 // Set env var PSTACK_ITER_DEBUG_RELEASE to simulate a 'release' value. |
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1275 // Set env var PSTACK_ITER_DEBUG_VERSION to simulate a 'version' value. |
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|
1276 // |
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|
1277 // frankenputer 'uname -r -v': 5.10 Generic_141445-09 |
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1278 // jurassic 'uname -r -v': 5.11 snv_164 |
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1279 // lonepeak 'uname -r -v': 5.11 snv_127 |
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|
1280 // |
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|
1281 static void set_has_newer_Pstack_iter(JNIEnv *env) { |
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|
1282 static bool done_set = false; |
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|
1283 |
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1284 if (done_set) { |
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|
1285 // already set has_newer_Pstack_iter |
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|
1286 return; |
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|
1287 } |
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|
1288 |
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|
1289 struct utsname name; |
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1290 if (uname(&name) == -1) { |
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|
1291 THROW_NEW_DEBUGGER_EXCEPTION("uname() failed!"); |
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|
1292 } |
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|
1293 dprintf_2("release='%s' version='%s'\n", name.release, name.version); |
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|
1294 |
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1295 if (_Pstack_iter_debug) { |
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|
1296 char *override = getenv("PSTACK_ITER_DEBUG_RELEASE"); |
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1297 if (override != NULL) { |
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1298 strncpy(name.release, override, SYS_NMLN - 1); |
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1299 name.release[SYS_NMLN - 2] = '\0'; |
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1300 dprintf_2("overriding with release='%s'\n", name.release); |
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1301 } |
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1302 override = getenv("PSTACK_ITER_DEBUG_VERSION"); |
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1303 if (override != NULL) { |
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1304 strncpy(name.version, override, SYS_NMLN - 1); |
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|
1305 name.version[SYS_NMLN - 2] = '\0'; |
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|
1306 dprintf_2("overriding with version='%s'\n", name.version); |
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1307 } |
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|
1308 } |
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|
1309 |
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|
1310 // the major number corresponds to the old SunOS major number |
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|
1311 int major = atoi(name.release); |
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1312 if (major >= 6) { |
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1313 dprintf_2("release is SunOS 6 or later\n"); |
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|
1314 has_newer_Pstack_iter = true; |
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|
1315 done_set = true; |
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|
1316 return; |
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|
1317 } |
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1318 if (major < 5) { |
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1319 dprintf_2("release is SunOS 4 or earlier\n"); |
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|
1320 done_set = true; |
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|
1321 return; |
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|
1322 } |
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|
1323 |
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1324 // some SunOS 5.* build so now check for Solaris versions |
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|
1325 char *dot = strchr(name.release, '.'); |
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|
1326 int minor = 0; |
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1327 if (dot != NULL) { |
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|
1328 // release is major.minor format |
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|
1329 *dot = NULL; |
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|
1330 minor = atoi(dot + 1); |
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1331 } |
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|
1332 |
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1333 if (minor <= 10) { |
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1334 dprintf_2("release is Solaris 10 or earlier\n"); |
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|
1335 done_set = true; |
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|
1336 return; |
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|
1337 } else if (minor >= 12) { |
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1338 dprintf_2("release is Solaris 12 or later\n"); |
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|
1339 has_newer_Pstack_iter = true; |
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|
1340 done_set = true; |
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|
1341 return; |
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|
1342 } |
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|
1343 |
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|
1344 // some Solaris 11 build so now check for internal build numbers |
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1345 if (strncmp(name.version, "snv_", 4) != 0) { |
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|
1346 dprintf_2("release is Solaris 11 post-GA or later\n"); |
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|
1347 has_newer_Pstack_iter = true; |
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|
1348 done_set = true; |
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changeset
|
1349 return; |
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changeset
|
1350 } |
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changeset
|
1351 |
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|
1352 // version begins with "snv_" so a pre-GA build of Solaris 11 |
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changeset
|
1353 int build = atoi(&name.version[4]); |
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|
1354 if (build >= 159) { |
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changeset
|
1355 dprintf_2("release is Nevada-B159 or later\n"); |
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changeset
|
1356 has_newer_Pstack_iter = true; |
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changeset
|
1357 } else { |
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changeset
|
1358 dprintf_2("release is Nevada-B158 or earlier\n"); |
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|
1359 } |
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|
1360 |
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changeset
|
1361 done_set = true; |
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1362 } |
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1363 #endif // !SOLARIS_11_B159_OR_LATER |
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1364 |
0 | 1365 /* |
1366 * Class: sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal | |
1367 * Method: initIDs | |
1368 * Signature: ()V | |
1369 * Description: get JNI ids for fields and methods of ProcDebuggerLocal class | |
1370 */ | |
1371 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_proc_ProcDebuggerLocal_initIDs | |
1372 (JNIEnv *env, jclass clazz) { | |
1373 _libsaproc_debug = getenv("LIBSAPROC_DEBUG") != NULL; | |
1374 if (_libsaproc_debug) { | |
1375 // propagate debug mode to libproc.so | |
1376 static const char* var = "LIBPROC_DEBUG=1"; | |
1377 putenv((char*)var); | |
1378 } | |
1379 | |
1380 void* libproc_handle = dlopen("libproc.so", RTLD_LAZY | RTLD_GLOBAL); | |
1381 if (libproc_handle == 0) | |
1382 THROW_NEW_DEBUGGER_EXCEPTION("can't load libproc.so, if you are using Solaris 5.7 or below, copy libproc.so from 5.8!"); | |
1383 | |
3306
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1384 #ifndef SOLARIS_11_B159_OR_LATER |
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1385 _Pstack_iter_debug = getenv("PSTACK_ITER_DEBUG") != NULL; |
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1386 |
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1387 set_has_newer_Pstack_iter(env); |
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1388 CHECK_EXCEPTION; |
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1389 dprintf_2("has_newer_Pstack_iter=%d\n", has_newer_Pstack_iter); |
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1390 #endif |
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1391 |
0 | 1392 p_ps_prochandle_ID = env->GetFieldID(clazz, "p_ps_prochandle", "J"); |
1393 CHECK_EXCEPTION; | |
1394 | |
1395 libthread_db_handle_ID = env->GetFieldID(clazz, "libthread_db_handle", "J"); | |
1396 CHECK_EXCEPTION; | |
1397 | |
1398 p_td_thragent_t_ID = env->GetFieldID(clazz, "p_td_thragent_t", "J"); | |
1399 CHECK_EXCEPTION; | |
1400 | |
1401 p_td_init_ID = env->GetFieldID(clazz, "p_td_init", "J"); | |
1402 CHECK_EXCEPTION; | |
1403 | |
1404 p_td_ta_new_ID = env->GetFieldID(clazz, "p_td_ta_new", "J"); | |
1405 CHECK_EXCEPTION; | |
1406 | |
1407 p_td_ta_delete_ID = env->GetFieldID(clazz, "p_td_ta_delete", "J"); | |
1408 CHECK_EXCEPTION; | |
1409 | |
1410 p_td_ta_thr_iter_ID = env->GetFieldID(clazz, "p_td_ta_thr_iter", "J"); | |
1411 CHECK_EXCEPTION; | |
1412 | |
1413 p_td_thr_get_info_ID = env->GetFieldID(clazz, "p_td_thr_get_info", "J"); | |
1414 CHECK_EXCEPTION; | |
1415 | |
1416 p_td_ta_map_id2thr_ID = env->GetFieldID(clazz, "p_td_ta_map_id2thr", "J"); | |
1417 CHECK_EXCEPTION; | |
1418 | |
1419 p_td_thr_getgregs_ID = env->GetFieldID(clazz, "p_td_thr_getgregs", "J"); | |
1420 CHECK_EXCEPTION; | |
1421 | |
1422 getThreadForThreadId_ID = env->GetMethodID(clazz, | |
1423 "getThreadForThreadId", "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;"); | |
1424 CHECK_EXCEPTION; | |
1425 | |
1426 pcRegIndex_ID = env->GetFieldID(clazz, "pcRegIndex", "I"); | |
1427 CHECK_EXCEPTION; | |
1428 | |
1429 fpRegIndex_ID = env->GetFieldID(clazz, "fpRegIndex", "I"); | |
1430 CHECK_EXCEPTION; | |
1431 | |
1432 createSenderFrame_ID = env->GetMethodID(clazz, | |
1433 "createSenderFrame", "(Lsun/jvm/hotspot/debugger/proc/ProcCFrame;JJ)Lsun/jvm/hotspot/debugger/proc/ProcCFrame;"); | |
1434 CHECK_EXCEPTION; | |
1435 | |
1436 createLoadObject_ID = env->GetMethodID(clazz, | |
1437 "createLoadObject", "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;"); | |
1438 CHECK_EXCEPTION; | |
1439 | |
1440 createClosestSymbol_ID = env->GetMethodID(clazz, | |
1441 "createClosestSymbol", "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;"); | |
1442 CHECK_EXCEPTION; | |
1443 | |
1444 listAdd_ID = env->GetMethodID(env->FindClass("java/util/List"), "add", "(Ljava/lang/Object;)Z"); | |
1445 CHECK_EXCEPTION; | |
1446 | |
1447 // part of the class sharing workaround | |
1448 classes_jsa_fd_ID = env->GetFieldID(clazz, "classes_jsa_fd", "I"); | |
1449 CHECK_EXCEPTION; | |
1450 p_file_map_header_ID = env->GetFieldID(clazz, "p_file_map_header", "J"); | |
1451 CHECK_EXCEPTION; | |
1452 } |