1 /*
2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include <objc/objc-runtime.h>
26 #import <Foundation/Foundation.h>
27 #import <JavaNativeFoundation/JavaNativeFoundation.h>
28
29 #include <JavaVM/jni.h>
30
31 #import <mach/mach.h>
32 #import <mach/mach_types.h>
33 #import <sys/sysctl.h>
34 #import <stdio.h>
35 #import <stdarg.h>
36 #import <stdlib.h>
37 #import <strings.h>
38 #import <dlfcn.h>
39 #import <limits.h>
40 #import <errno.h>
41 #import <sys/types.h>
42 #import <sys/ptrace.h>
43 #include "libproc_impl.h"
44
45 #define UNSUPPORTED_ARCH "Unsupported architecture!"
46
47 #if defined(x86_64) && !defined(amd64)
48 #define amd64 1
49 #endif
50
51 #if amd64
52 #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h"
53 #else
54 #error UNSUPPORTED_ARCH
55 #endif
56
57 static jfieldID symbolicatorID = 0; // set in _init0
58 static jfieldID taskID = 0; // set in _init0
59
60 static jfieldID p_ps_prochandle_ID = 0;
61 static jfieldID loadObjectList_ID = 0;
62 static jmethodID listAdd_ID = 0;
63
64 static jmethodID createClosestSymbol_ID = 0;
65 static jmethodID createLoadObject_ID = 0;
66 static jmethodID getJavaThreadsInfo_ID = 0;
67
68 // indicator if thread id (lwpid_t) was set
69 static bool _threads_filled = false;
70
71 static void putSymbolicator(JNIEnv *env, jobject this_obj, id symbolicator) {
72 (*env)->SetLongField(env, this_obj, symbolicatorID, (jlong)(intptr_t)symbolicator);
73 }
74
75 static id getSymbolicator(JNIEnv *env, jobject this_obj) {
76 jlong ptr = (*env)->GetLongField(env, this_obj, symbolicatorID);
77 return (id)(intptr_t)ptr;
78 }
79
80 static void putTask(JNIEnv *env, jobject this_obj, task_t task) {
81 (*env)->SetLongField(env, this_obj, taskID, (jlong)task);
82 }
83
84 static task_t getTask(JNIEnv *env, jobject this_obj) {
85 jlong ptr = (*env)->GetLongField(env, this_obj, taskID);
86 return (task_t)ptr;
87 }
88
89 #define CHECK_EXCEPTION_(value) if ((*env)->ExceptionOccurred(env)) { return value; }
90 #define CHECK_EXCEPTION if ((*env)->ExceptionOccurred(env)) { return;}
91 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; }
92 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;}
93 #define CHECK_EXCEPTION_CLEAR if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); }
94 #define CHECK_EXCEPTION_CLEAR_VOID if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return; }
95 #define CHECK_EXCEPTION_CLEAR_(value) if ((*env)->ExceptionOccurred(env)) { (*env)->ExceptionClear(env); return value; }
96
97 static void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) {
98 jclass exceptionClass = (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException");
99 CHECK_EXCEPTION;
100 (*env)->ThrowNew(env, exceptionClass, errMsg);
101 }
102
103 static struct ps_prochandle* get_proc_handle(JNIEnv* env, jobject this_obj) {
104 jlong ptr = (*env)->GetLongField(env, this_obj, p_ps_prochandle_ID);
105 return (struct ps_prochandle*)(intptr_t)ptr;
106 }
107
108 #if defined(__i386__)
109 #define hsdb_thread_state_t x86_thread_state32_t
110 #define hsdb_float_state_t x86_float_state32_t
111 #define HSDB_THREAD_STATE x86_THREAD_STATE32
112 #define HSDB_FLOAT_STATE x86_FLOAT_STATE32
113 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE32_COUNT
114 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE32_COUNT
115 #elif defined(__x86_64__)
116 #define hsdb_thread_state_t x86_thread_state64_t
117 #define hsdb_float_state_t x86_float_state64_t
118 #define HSDB_THREAD_STATE x86_THREAD_STATE64
119 #define HSDB_FLOAT_STATE x86_FLOAT_STATE64
120 #define HSDB_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT
121 #define HSDB_FLOAT_STATE_COUNT x86_FLOAT_STATE64_COUNT
122 #else
123 #error UNSUPPORTED_ARCH
124 #endif
125
126 /*
127 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
128 * Method: init0
129 * Signature: ()V
130 */
131 JNIEXPORT void JNICALL
132 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_init0(JNIEnv *env, jclass cls) {
133 symbolicatorID = (*env)->GetFieldID(env, cls, "symbolicator", "J");
134 CHECK_EXCEPTION;
135 taskID = (*env)->GetFieldID(env, cls, "task", "J");
136 CHECK_EXCEPTION;
137
138 // for core file
139 p_ps_prochandle_ID = (*env)->GetFieldID(env, cls, "p_ps_prochandle", "J");
140 CHECK_EXCEPTION;
141 loadObjectList_ID = (*env)->GetFieldID(env, cls, "loadObjectList", "Ljava/util/List;");
142 CHECK_EXCEPTION;
143
144 // methods we use
145 createClosestSymbol_ID = (*env)->GetMethodID(env, cls, "createClosestSymbol",
146 "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
147 CHECK_EXCEPTION;
148 createLoadObject_ID = (*env)->GetMethodID(env, cls, "createLoadObject",
149 "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
150 CHECK_EXCEPTION;
151
152 // java.util.List method we call
153 jclass listClass = (*env)->FindClass(env, "java/util/List");
154 CHECK_EXCEPTION;
155 listAdd_ID = (*env)->GetMethodID(env, listClass, "add", "(Ljava/lang/Object;)Z");
156 CHECK_EXCEPTION;
157 getJavaThreadsInfo_ID = (*env)->GetMethodID(env, cls, "getJavaThreadsInfo",
158 "()[J");
159 CHECK_EXCEPTION;
160
161 init_libproc(getenv("LIBSAPROC_DEBUG") != NULL);
162 }
163
164 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getAddressSize
165 (JNIEnv *env, jclass cls)
166 {
167 #ifdef _LP64
168 return 8;
169 #else
170 #error UNSUPPORTED_ARCH
171 #endif
172 }
173
174 /** called by Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0 */
175 jlong lookupByNameIncore(
176 JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jstring objectName, jstring symbolName)
177 {
178 const char *objectName_cstr, *symbolName_cstr;
179 jlong addr;
180 jboolean isCopy;
181 objectName_cstr = NULL;
182 if (objectName != NULL) {
183 objectName_cstr = (*env)->GetStringUTFChars(env, objectName, &isCopy);
184 CHECK_EXCEPTION_(0);
185 }
186 symbolName_cstr = (*env)->GetStringUTFChars(env, symbolName, &isCopy);
187 CHECK_EXCEPTION_(0);
188
189 print_debug("look for %s \n", symbolName_cstr);
190 addr = (jlong) lookup_symbol(ph, objectName_cstr, symbolName_cstr);
191
192 if (objectName_cstr != NULL) {
193 (*env)->ReleaseStringUTFChars(env, objectName, objectName_cstr);
194 }
195 (*env)->ReleaseStringUTFChars(env, symbolName, symbolName_cstr);
196 return addr;
197 }
198
199 /*
200 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
201 * Method: lookupByName0
202 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
203 */
204 JNIEXPORT jlong JNICALL
205 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByName0(
206 JNIEnv *env, jobject this_obj,
207 jstring objectName, jstring symbolName)
208 {
209 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
210 if (ph != NULL && ph->core != NULL) {
211 return lookupByNameIncore(env, ph, this_obj, objectName, symbolName);
212 }
213
214 jlong address = 0;
215
216 JNF_COCOA_ENTER(env);
217 NSString *symbolNameString = JNFJavaToNSString(env, symbolName);
218
219 print_debug("lookupInProcess called for %s\n", [symbolNameString UTF8String]);
220
221 id symbolicator = getSymbolicator(env, this_obj);
222 if (symbolicator != nil) {
223 uint64_t (*dynamicCall)(id, SEL, NSString *) = (uint64_t (*)(id, SEL, NSString *))&objc_msgSend;
224 address = (jlong) dynamicCall(symbolicator, @selector(addressForSymbol:), symbolNameString);
225 }
226
227 print_debug("address of symbol %s = %llx\n", [symbolNameString UTF8String], address);
228 JNF_COCOA_EXIT(env);
229
230 return address;
231 }
232
233 /*
234 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
235 * Method: lookupByAddress0
236 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
237 */
238 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_lookupByAddress0
239 (JNIEnv *env, jobject this_obj, jlong addr) {
240 uintptr_t offset;
241 const char* sym = NULL;
242 jstring sym_string;
243
244 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
245 if (ph != NULL && ph->core != NULL) {
246 sym = symbol_for_pc(ph, (uintptr_t) addr, &offset);
247 if (sym == NULL) return 0;
248 sym_string = (*env)->NewStringUTF(env, sym);
249 CHECK_EXCEPTION_(0);
250 return (*env)->CallObjectMethod(env, this_obj, createClosestSymbol_ID,
251 sym_string, (jlong)offset);
252 }
253 return 0;
254 }
255
256 /** called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0 */
257 jbyteArray readBytesFromCore(
258 JNIEnv *env, struct ps_prochandle *ph, jobject this_obj, jlong addr, jlong numBytes)
259 {
260 jboolean isCopy;
261 jbyteArray array;
262 jbyte *bufPtr;
263 ps_err_e err;
264
265 array = (*env)->NewByteArray(env, numBytes);
266 CHECK_EXCEPTION_(0);
267 bufPtr = (*env)->GetByteArrayElements(env, array, &isCopy);
268 CHECK_EXCEPTION_(0);
269
270 err = ps_pread(ph, (psaddr_t) (uintptr_t)addr, bufPtr, numBytes);
271 (*env)->ReleaseByteArrayElements(env, array, bufPtr, 0);
272 return (err == PS_OK)? array : 0;
273 }
274
275 /*
276 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
277 * Method: readBytesFromProcess0
278 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult;
279 */
280 JNIEXPORT jbyteArray JNICALL
281 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_readBytesFromProcess0(
282 JNIEnv *env, jobject this_obj,
283 jlong addr, jlong numBytes)
284 {
285 print_debug("readBytesFromProcess called. addr = %llx numBytes = %lld\n", addr, numBytes);
286
287 // must allocate storage instead of using former parameter buf
288 jbyteArray array;
289
290 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
291 if (ph != NULL && ph->core != NULL) {
292 return readBytesFromCore(env, ph, this_obj, addr, numBytes);
293 }
294
295 array = (*env)->NewByteArray(env, numBytes);
296 CHECK_EXCEPTION_(0);
297
298 unsigned long alignedAddress;
299 unsigned long alignedLength = 0;
300 kern_return_t result;
301 vm_offset_t *pages;
302 int *mapped;
303 long pageCount;
304 uint byteCount;
305 int i;
306 unsigned long remaining;
307
308 alignedAddress = trunc_page(addr);
309 if (addr != alignedAddress) {
310 alignedLength += addr - alignedAddress;
311 }
312 alignedLength = round_page(numBytes);
313 pageCount = alignedLength/vm_page_size;
314
315 // Allocate storage for pages and flags.
316 pages = malloc(pageCount * sizeof(vm_offset_t));
317 mapped = calloc(pageCount, sizeof(int));
318
319 task_t gTask = getTask(env, this_obj);
320 // Try to read each of the pages.
321 for (i = 0; i < pageCount; i++) {
322 result = vm_read(gTask, alignedAddress + i*vm_page_size, vm_page_size,
323 &pages[i], &byteCount);
324 mapped[i] = (result == KERN_SUCCESS);
325 // assume all failures are unmapped pages
326 }
327
328 print_debug("%ld pages\n", pageCount);
329
330 remaining = numBytes;
331
332 for (i = 0; i < pageCount; i++) {
333 unsigned long len = vm_page_size;
334 unsigned long start = 0;
335
336 if (i == 0) {
337 start = addr - alignedAddress;
338 len = vm_page_size - start;
339 }
340
341 if (i == (pageCount - 1)) {
342 len = remaining;
343 }
344
345 if (mapped[i]) {
346 print_debug("page %d mapped (len %ld start %ld)\n", i, len, start);
347 (*env)->SetByteArrayRegion(env, array, 0, len, ((jbyte *) pages[i] + start));
348 vm_deallocate(mach_task_self(), pages[i], vm_page_size);
349 }
350
351 remaining -= len;
352 }
353
354 free (pages);
355 free (mapped);
356 return array;
357 }
358
359 /** Only used for core file reading, set thread_id for threads which is got after core file parsed.
360 * Thread context is available in Mach-O core file but thread id is not. We can get thread id
361 * from Threads which store all java threads information when they are created. Here we can identify
362 * them as java threads by checking if a thread's rsp or rbp within a java thread's stack.
363 * Note Macosx uses unique_thread_id which is different from other platforms though printed ids
364 * are still pthread id. Function BsdDebuggerLocal.getJavaThreadsInfo returns an array of long
365 * integers to host all java threads' id, stack_start, stack_end as:
366 * [uid0, stack_start0, stack_end0, uid1, stack_start1, stack_end1, ...]
367 *
368 * The work cannot be done at init0 since Threads is not available yet(VM not initialized yet).
369 * This function should be called only once if succeeded
370 */
371 bool fill_java_threads(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
372 int n = 0, i = 0, j;
373 struct reg regs;
374
375 jlongArray thrinfos = (*env)->CallObjectMethod(env, this_obj, getJavaThreadsInfo_ID);
376 CHECK_EXCEPTION_(false);
377 int len = (int)(*env)->GetArrayLength(env, thrinfos);
378 uint64_t* cinfos = (uint64_t *)(*env)->GetLongArrayElements(env, thrinfos, NULL);
379 CHECK_EXCEPTION_(false);
380 n = get_num_threads(ph);
381 print_debug("fill_java_threads called, num_of_thread = %d\n", n);
382 for (i = 0; i < n; i++) {
383 if (!get_nth_lwp_regs(ph, i, ®s)) {
384 print_debug("Could not get regs of thread %d, already set!\n", i);
385 return false;
386 }
387 for (j = 0; j < len; j += 3) {
388 lwpid_t uid = cinfos[j];
389 uint64_t beg = cinfos[j + 1];
390 uint64_t end = cinfos[j + 2];
391 if ((regs.r_rsp < end && regs.r_rsp >= beg) ||
392 (regs.r_rbp < end && regs.r_rbp >= beg)) {
393 set_lwp_id(ph, i, uid);
394 break;
395 }
396 }
397 }
398 (*env)->ReleaseLongArrayElements(env, thrinfos, (jlong*)cinfos, 0);
399 CHECK_EXCEPTION_(false);
400 return true;
401 }
402
403 /* For core file only, called from
404 * Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0
405 */
406 jlongArray getThreadIntegerRegisterSetFromCore(JNIEnv *env, jobject this_obj, long lwp_id, struct ps_prochandle* ph) {
407 if (!_threads_filled) {
408 if (!fill_java_threads(env, this_obj, ph)) {
409 throw_new_debugger_exception(env, "Failed to fill in threads");
410 return 0;
411 } else {
412 _threads_filled = true;
413 }
414 }
415
416 struct reg gregs;
417 jboolean isCopy;
418 jlongArray array;
419 jlong *regs;
420
421 if (get_lwp_regs(ph, lwp_id, &gregs) != true) {
422 THROW_NEW_DEBUGGER_EXCEPTION_("get_thread_regs failed for a lwp", 0);
423 }
424
425 #undef NPRGREG
426 #undef REG_INDEX
427 #if amd64
428 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
429 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
430
431 array = (*env)->NewLongArray(env, NPRGREG);
432 CHECK_EXCEPTION_(0);
433 regs = (*env)->GetLongArrayElements(env, array, &isCopy);
434
435 regs[REG_INDEX(R15)] = gregs.r_r15;
436 regs[REG_INDEX(R14)] = gregs.r_r14;
437 regs[REG_INDEX(R13)] = gregs.r_r13;
438 regs[REG_INDEX(R12)] = gregs.r_r12;
439 regs[REG_INDEX(RBP)] = gregs.r_rbp;
440 regs[REG_INDEX(RBX)] = gregs.r_rbx;
441 regs[REG_INDEX(R11)] = gregs.r_r11;
442 regs[REG_INDEX(R10)] = gregs.r_r10;
443 regs[REG_INDEX(R9)] = gregs.r_r9;
444 regs[REG_INDEX(R8)] = gregs.r_r8;
445 regs[REG_INDEX(RAX)] = gregs.r_rax;
446 regs[REG_INDEX(RCX)] = gregs.r_rcx;
447 regs[REG_INDEX(RDX)] = gregs.r_rdx;
448 regs[REG_INDEX(RSI)] = gregs.r_rsi;
449 regs[REG_INDEX(RDI)] = gregs.r_rdi;
450 regs[REG_INDEX(RIP)] = gregs.r_rip;
451 regs[REG_INDEX(CS)] = gregs.r_cs;
452 regs[REG_INDEX(RSP)] = gregs.r_rsp;
453 regs[REG_INDEX(SS)] = gregs.r_ss;
454 regs[REG_INDEX(FSBASE)] = 0;
455 regs[REG_INDEX(GSBASE)] = 0;
456 regs[REG_INDEX(DS)] = gregs.r_ds;
457 regs[REG_INDEX(ES)] = gregs.r_es;
458 regs[REG_INDEX(FS)] = gregs.r_fs;
459 regs[REG_INDEX(GS)] = gregs.r_gs;
460 regs[REG_INDEX(TRAPNO)] = gregs.r_trapno;
461 regs[REG_INDEX(RFL)] = gregs.r_rflags;
462
463 #endif /* amd64 */
464 (*env)->ReleaseLongArrayElements(env, array, regs, JNI_COMMIT);
465 return array;
466 }
467
468 /*
469 * Lookup the thread_t that corresponds to the given thread_id.
470 * The thread_id should be the result from calling thread_info() with THREAD_IDENTIFIER_INFO
471 * and reading the m_ident_info.thread_id returned.
472 * The returned thread_t is the mach send right to the kernel port for the corresponding thread.
473 *
474 * We cannot simply use the OSThread._thread_id field in the JVM. This is set to ::mach_thread_self()
475 * in the VM, but that thread port is not valid for a remote debugger to access the thread.
476 */
477 thread_t
478 lookupThreadFromThreadId(task_t task, jlong thread_id) {
479 print_debug("lookupThreadFromThreadId thread_id=0x%llx\n", thread_id);
480
481 thread_array_t thread_list = NULL;
482 mach_msg_type_number_t thread_list_count = 0;
483 thread_t result_thread = 0;
484 int i;
485
486 // get the list of all the send rights
487 kern_return_t result = task_threads(task, &thread_list, &thread_list_count);
488 if (result != KERN_SUCCESS) {
489 print_debug("task_threads returned 0x%x\n", result);
490 return 0;
491 }
492
493 for(i = 0 ; i < thread_list_count; i++) {
494 thread_identifier_info_data_t m_ident_info;
495 mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT;
496
497 // get the THREAD_IDENTIFIER_INFO for the send right
498 result = thread_info(thread_list[i], THREAD_IDENTIFIER_INFO, (thread_info_t) &m_ident_info, &count);
499 if (result != KERN_SUCCESS) {
500 print_debug("thread_info returned 0x%x\n", result);
501 break;
502 }
503
504 // if this is the one we're looking for, return the send right
505 if (thread_id == m_ident_info.thread_id)
506 {
507 result_thread = thread_list[i];
508 break;
509 }
510 }
511
512 vm_size_t thread_list_size = (vm_size_t) (thread_list_count * sizeof (thread_t));
513 vm_deallocate(mach_task_self(), (vm_address_t) thread_list, thread_list_count);
514
515 return result_thread;
516 }
517
518
519 /*
520 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
521 * Method: getThreadIntegerRegisterSet0
522 * Signature: (J)[J
523 */
524 JNIEXPORT jlongArray JNICALL
525 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_getThreadIntegerRegisterSet0(
526 JNIEnv *env, jobject this_obj,
527 jlong thread_id)
528 {
529 print_debug("getThreadRegisterSet0 called\n");
530
531 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
532 if (ph != NULL && ph->core != NULL) {
533 return getThreadIntegerRegisterSetFromCore(env, this_obj, thread_id, ph);
534 }
535
536 kern_return_t result;
537 thread_t tid;
538 mach_msg_type_number_t count = HSDB_THREAD_STATE_COUNT;
539 hsdb_thread_state_t state;
540 jlongArray registerArray;
541 jlong *primitiveArray;
542 task_t gTask = getTask(env, this_obj);
543
544 tid = lookupThreadFromThreadId(gTask, thread_id);
545
546 result = thread_get_state(tid, HSDB_THREAD_STATE, (thread_state_t)&state, &count);
547
548 if (result != KERN_SUCCESS) {
549 print_error("getregs: thread_get_state(%d) failed (%d)\n", tid, result);
550 return NULL;
551 }
552
553 #if amd64
554 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
555 #undef REG_INDEX
556 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
557
558 // 64 bit
559 print_debug("Getting threads for a 64-bit process\n");
560 registerArray = (*env)->NewLongArray(env, NPRGREG);
561 CHECK_EXCEPTION_(0);
562 primitiveArray = (*env)->GetLongArrayElements(env, registerArray, NULL);
563
564 primitiveArray[REG_INDEX(R15)] = state.__r15;
565 primitiveArray[REG_INDEX(R14)] = state.__r14;
566 primitiveArray[REG_INDEX(R13)] = state.__r13;
567 primitiveArray[REG_INDEX(R12)] = state.__r12;
568 primitiveArray[REG_INDEX(R11)] = state.__r11;
569 primitiveArray[REG_INDEX(R10)] = state.__r10;
570 primitiveArray[REG_INDEX(R9)] = state.__r9;
571 primitiveArray[REG_INDEX(R8)] = state.__r8;
572 primitiveArray[REG_INDEX(RDI)] = state.__rdi;
573 primitiveArray[REG_INDEX(RSI)] = state.__rsi;
574 primitiveArray[REG_INDEX(RBP)] = state.__rbp;
575 primitiveArray[REG_INDEX(RBX)] = state.__rbx;
576 primitiveArray[REG_INDEX(RDX)] = state.__rdx;
577 primitiveArray[REG_INDEX(RCX)] = state.__rcx;
578 primitiveArray[REG_INDEX(RAX)] = state.__rax;
579 primitiveArray[REG_INDEX(TRAPNO)] = 0; // trapno, not used
580 primitiveArray[REG_INDEX(ERR)] = 0; // err, not used
581 primitiveArray[REG_INDEX(RIP)] = state.__rip;
582 primitiveArray[REG_INDEX(CS)] = state.__cs;
583 primitiveArray[REG_INDEX(RFL)] = state.__rflags;
584 primitiveArray[REG_INDEX(RSP)] = state.__rsp;
585 primitiveArray[REG_INDEX(SS)] = 0; // We don't have SS
586 primitiveArray[REG_INDEX(FS)] = state.__fs;
587 primitiveArray[REG_INDEX(GS)] = state.__gs;
588 primitiveArray[REG_INDEX(ES)] = 0;
589 primitiveArray[REG_INDEX(DS)] = 0;
590 primitiveArray[REG_INDEX(FSBASE)] = 0;
591 primitiveArray[REG_INDEX(GSBASE)] = 0;
592 print_debug("set registers\n");
593
594 (*env)->ReleaseLongArrayElements(env, registerArray, primitiveArray, 0);
595
596 #else
597 #error UNSUPPORTED_ARCH
598 #endif /* amd64 */
599
600 return registerArray;
601 }
602
603 /*
604 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
605 * Method: translateTID0
606 * Signature: (I)I
607 */
608 JNIEXPORT jint JNICALL
609 Java_sun_jvm_hotspot_debugger_macosx_MacOSXDebuggerLocal_translateTID0(
610 JNIEnv *env, jobject this_obj, jint tid)
611 {
612 print_debug("translateTID0 called on tid = 0x%x\n", (int)tid);
613
614 kern_return_t result;
615 thread_t foreign_tid, usable_tid;
616 mach_msg_type_name_t type;
617
618 foreign_tid = tid;
619
620 task_t gTask = getTask(env, this_obj);
621 result = mach_port_extract_right(gTask, foreign_tid,
622 MACH_MSG_TYPE_COPY_SEND,
623 &usable_tid, &type);
624 if (result != KERN_SUCCESS)
625 return -1;
626
627 print_debug("translateTID0: 0x%x -> 0x%x\n", foreign_tid, usable_tid);
628
629 return (jint) usable_tid;
630 }
631
632
633 static bool ptrace_continue(pid_t pid, int signal) {
634 // pass the signal to the process so we don't swallow it
635 int res;
636 if ((res = ptrace(PT_CONTINUE, pid, (caddr_t)1, signal)) < 0) {
637 print_error("attach: ptrace(PT_CONTINUE, %d) failed with %d\n", pid, res);
638 return false;
639 }
640 return true;
641 }
642
643 // waits until the ATTACH has stopped the process
644 // by signal SIGSTOP
645 static bool ptrace_waitpid(pid_t pid) {
646 int ret;
647 int status;
648 while (true) {
649 // Wait for debuggee to stop.
650 ret = waitpid(pid, &status, 0);
651 if (ret >= 0) {
652 if (WIFSTOPPED(status)) {
653 // Any signal will stop the thread, make sure it is SIGSTOP. Otherwise SIGSTOP
654 // will still be pending and delivered when the process is DETACHED and the process
655 // will go to sleep.
656 if (WSTOPSIG(status) == SIGSTOP) {
657 // Debuggee stopped by SIGSTOP.
658 return true;
659 }
660 if (!ptrace_continue(pid, WSTOPSIG(status))) {
661 print_error("attach: Failed to correctly attach to VM. VM might HANG! [PTRACE_CONT failed, stopped by %d]\n", WSTOPSIG(status));
662 return false;
663 }
664 } else {
665 print_error("attach: waitpid(): Child process exited/terminated (status = 0x%x)\n", status);
666 return false;
667 }
668 } else {
669 switch (errno) {
670 case EINTR:
671 continue;
672 break;
673 case ECHILD:
674 print_error("attach: waitpid() failed. Child process pid (%d) does not exist \n", pid);
675 break;
676 case EINVAL:
677 print_error("attach: waitpid() failed. Invalid options argument.\n");
678 break;
679 default:
680 print_error("attach: waitpid() failed. Unexpected error %d\n",errno);
681 break;
682 }
683 return false;
684 }
685 }
686 }
687
688 // attach to a process/thread specified by "pid"
689 static bool ptrace_attach(pid_t pid) {
690 int res;
691 if ((res = ptrace(PT_ATTACH, pid, 0, 0)) < 0) {
692 print_error("ptrace(PT_ATTACH, %d) failed with %d\n", pid, res);
693 return false;
694 } else {
695 return ptrace_waitpid(pid);
696 }
697 }
698
699 /*
700 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
701 * Method: attach0
702 * Signature: (I)V
703 */
704 JNIEXPORT void JNICALL
705 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__I(
706 JNIEnv *env, jobject this_obj, jint jpid)
707 {
708 print_debug("attach0 called for jpid=%d\n", (int)jpid);
709
710 JNF_COCOA_ENTER(env);
711
712 kern_return_t result;
713 task_t gTask = 0;
714 result = task_for_pid(mach_task_self(), jpid, &gTask);
715 if (result != KERN_SUCCESS) {
716 print_error("attach: task_for_pid(%d) failed: '%s' (%d)\n", (int)jpid, mach_error_string(result), result);
717 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process. Could be caused by an incorrect pid or lack of privileges.");
718 }
719 putTask(env, this_obj, gTask);
720
721 // use ptrace to stop the process
722 // on os x, ptrace only needs to be called on the process, not the individual threads
723 if (ptrace_attach(jpid) != true) {
724 mach_port_deallocate(mach_task_self(), gTask);
725 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the process");
726 }
727
728 id symbolicator = nil;
729 id jrsSymbolicator = objc_lookUpClass("JRSSymbolicator");
730 if (jrsSymbolicator != nil) {
731 id (*dynamicCall)(id, SEL, pid_t) = (id (*)(id, SEL, pid_t))&objc_msgSend;
732 symbolicator = dynamicCall(jrsSymbolicator, @selector(symbolicatorForPid:), (pid_t)jpid);
733 }
734 if (symbolicator != nil) {
735 CFRetain(symbolicator); // pin symbolicator while in java heap
736 }
737
738 putSymbolicator(env, this_obj, symbolicator);
739 if (symbolicator == nil) {
740 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach symbolicator to the process");
741 }
742
743 JNF_COCOA_EXIT(env);
744 }
745
746 /** For core file,
747 called from Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2 */
748 static void fillLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
749 int n = 0, i = 0;
750
751 // add load objects
752 n = get_num_libs(ph);
753 for (i = 0; i < n; i++) {
754 uintptr_t base;
755 const char* name;
756 jobject loadObject;
757 jobject loadObjectList;
758 jstring nameString;
759
760 base = get_lib_base(ph, i);
761 name = get_lib_name(ph, i);
762 nameString = (*env)->NewStringUTF(env, name);
763 CHECK_EXCEPTION;
764 loadObject = (*env)->CallObjectMethod(env, this_obj, createLoadObject_ID,
765 nameString, (jlong)0, (jlong)base);
766 CHECK_EXCEPTION;
767 loadObjectList = (*env)->GetObjectField(env, this_obj, loadObjectList_ID);
768 CHECK_EXCEPTION;
769 (*env)->CallBooleanMethod(env, loadObjectList, listAdd_ID, loadObject);
770 CHECK_EXCEPTION;
771 }
772 }
773
774 /*
775 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
776 * Method: attach0
777 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
778 */
779 JNIEXPORT void JNICALL
780 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2(
781 JNIEnv *env, jobject this_obj, jstring execName, jstring coreName)
782 {
783 const char *execName_cstr;
784 const char *coreName_cstr;
785 jboolean isCopy;
786 struct ps_prochandle* ph;
787
788 execName_cstr = (*env)->GetStringUTFChars(env, execName, &isCopy);
789 CHECK_EXCEPTION;
790 coreName_cstr = (*env)->GetStringUTFChars(env, coreName, &isCopy);
791 CHECK_EXCEPTION;
792
793 print_debug("attach: %s %s\n", execName_cstr, coreName_cstr);
794
795 if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) {
796 (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
797 (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr);
798 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file");
799 }
800 (*env)->SetLongField(env, this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph);
801 (*env)->ReleaseStringUTFChars(env, execName, execName_cstr);
802 (*env)->ReleaseStringUTFChars(env, coreName, coreName_cstr);
803 fillLoadObjects(env, this_obj, ph);
804 }
805
806 /*
807 * Class: sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal
808 * Method: detach0
809 * Signature: ()V
810 */
811 JNIEXPORT void JNICALL
812 Java_sun_jvm_hotspot_debugger_bsd_BsdDebuggerLocal_detach0(
813 JNIEnv *env, jobject this_obj)
814 {
815 print_debug("detach0 called\n");
816 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
817 if (ph != NULL && ph->core != NULL) {
818 Prelease(ph);
819 return;
820 }
821 JNF_COCOA_ENTER(env);
822 task_t gTask = getTask(env, this_obj);
823
824 // detach from the ptraced process causing it to resume execution
825 int pid;
826 kern_return_t k_res;
827 k_res = pid_for_task(gTask, &pid);
828 if (k_res != KERN_SUCCESS) {
829 print_error("detach: pid_for_task(%d) failed (%d)\n", pid, k_res);
830 }
831 else {
832 int res = ptrace(PT_DETACH, pid, 0, 0);
833 if (res < 0) {
834 print_error("detach: ptrace(PT_DETACH, %d) failed (%d)\n", pid, res);
835 }
836 }
837
838 mach_port_deallocate(mach_task_self(), gTask);
839 id symbolicator = getSymbolicator(env, this_obj);
840 if (symbolicator != nil) {
841 CFRelease(symbolicator);
842 }
843 JNF_COCOA_EXIT(env);
844 }