1 /*
2 * Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2019, 2021, NTT DATA.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include <jni.h>
27 #include "libproc.h"
28 #include "proc_service.h"
29
30 #include <elf.h>
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <fcntl.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <limits.h>
37 #include <cxxabi.h>
38
39 #if defined(x86_64) && !defined(amd64)
40 #define amd64 1
41 #endif
42
43 #if defined(i386) && !defined(i586)
44 #define i586 1
45 #endif
46
47 #ifdef i586
48 #include "sun_jvm_hotspot_debugger_x86_X86ThreadContext.h"
49 #endif
50
51 #ifdef amd64
52 #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h"
53 #endif
54
55 #if defined(ppc64) || defined(ppc64le)
56 #include "sun_jvm_hotspot_debugger_ppc64_PPC64ThreadContext.h"
57 #endif
58
59 #ifdef aarch64
60 #include "sun_jvm_hotspot_debugger_aarch64_AARCH64ThreadContext.h"
61 #endif
62
63 class AutoJavaString {
64 JNIEnv* m_env;
65 jstring m_str;
66 const char* m_buf;
67
68 public:
69 // check env->ExceptionOccurred() after ctor
70 AutoJavaString(JNIEnv* env, jstring str)
71 : m_env(env), m_str(str), m_buf(str == NULL ? NULL : env->GetStringUTFChars(str, NULL)) {
72 }
73
74 ~AutoJavaString() {
75 if (m_buf) {
76 m_env->ReleaseStringUTFChars(m_str, m_buf);
77 }
78 }
79
80 operator const char* () const {
81 return m_buf;
82 }
83 };
84
85 static jfieldID p_ps_prochandle_ID = 0;
86 static jfieldID threadList_ID = 0;
87 static jfieldID loadObjectList_ID = 0;
88
89 static jmethodID createClosestSymbol_ID = 0;
90 static jmethodID createLoadObject_ID = 0;
91 static jmethodID getThreadForThreadId_ID = 0;
92 static jmethodID listAdd_ID = 0;
93
94 /*
95 * SA_ALTROOT environment variable.
96 * This memory holds env string for putenv(3).
97 */
98 static char *saaltroot = NULL;
99
100 #define CHECK_EXCEPTION_(value) if (env->ExceptionOccurred()) { return value; }
101 #define CHECK_EXCEPTION if (env->ExceptionOccurred()) { return;}
102 #define THROW_NEW_DEBUGGER_EXCEPTION_(str, value) { throw_new_debugger_exception(env, str); return value; }
103 #define THROW_NEW_DEBUGGER_EXCEPTION(str) { throw_new_debugger_exception(env, str); return;}
104
105 void throw_new_debugger_exception(JNIEnv* env, const char* errMsg) {
106 jclass clazz;
107 clazz = env->FindClass("sun/jvm/hotspot/debugger/DebuggerException");
108 CHECK_EXCEPTION;
109 env->ThrowNew(clazz, errMsg);
110 }
111
112 struct ps_prochandle* get_proc_handle(JNIEnv* env, jobject this_obj) {
113 jlong ptr = env->GetLongField(this_obj, p_ps_prochandle_ID);
114 return (struct ps_prochandle*)(intptr_t)ptr;
115 }
116
117 /*
118 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
119 * Method: init0
120 * Signature: ()V
121 */
122 extern "C"
123 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_init0
124 (JNIEnv *env, jclass cls) {
125 jclass listClass;
126
127 if (init_libproc(getenv("LIBSAPROC_DEBUG") != NULL) != true) {
128 THROW_NEW_DEBUGGER_EXCEPTION("can't initialize libproc");
129 }
130
131 // fields we use
132 p_ps_prochandle_ID = env->GetFieldID(cls, "p_ps_prochandle", "J");
133 CHECK_EXCEPTION;
134 threadList_ID = env->GetFieldID(cls, "threadList", "Ljava/util/List;");
135 CHECK_EXCEPTION;
136 loadObjectList_ID = env->GetFieldID(cls, "loadObjectList", "Ljava/util/List;");
137 CHECK_EXCEPTION;
138
139 // methods we use
140 createClosestSymbol_ID = env->GetMethodID(cls, "createClosestSymbol",
141 "(Ljava/lang/String;J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;");
142 CHECK_EXCEPTION;
143 createLoadObject_ID = env->GetMethodID(cls, "createLoadObject",
144 "(Ljava/lang/String;JJ)Lsun/jvm/hotspot/debugger/cdbg/LoadObject;");
145 CHECK_EXCEPTION;
146 getThreadForThreadId_ID = env->GetMethodID(cls, "getThreadForThreadId",
147 "(J)Lsun/jvm/hotspot/debugger/ThreadProxy;");
148 CHECK_EXCEPTION;
149 // java.util.List method we call
150 listClass = env->FindClass("java/util/List");
151 CHECK_EXCEPTION;
152 listAdd_ID = env->GetMethodID(listClass, "add", "(Ljava/lang/Object;)Z");
153 CHECK_EXCEPTION;
154 }
155
156 extern "C"
157 JNIEXPORT jint JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_getAddressSize
158 (JNIEnv *env, jclass cls)
159 {
160 #ifdef _LP64
161 return 8;
162 #else
163 return 4;
164 #endif
165
166 }
167
168
169 static void fillThreadsAndLoadObjects(JNIEnv* env, jobject this_obj, struct ps_prochandle* ph) {
170 int n = 0, i = 0;
171
172 // add threads
173 n = get_num_threads(ph);
174 for (i = 0; i < n; i++) {
175 jobject thread;
176 jobject threadList;
177 lwpid_t lwpid;
178
179 lwpid = get_lwp_id(ph, i);
180 thread = env->CallObjectMethod(this_obj, getThreadForThreadId_ID, (jlong)lwpid);
181 CHECK_EXCEPTION;
182 threadList = env->GetObjectField(this_obj, threadList_ID);
183 CHECK_EXCEPTION;
184 env->CallBooleanMethod(threadList, listAdd_ID, thread);
185 CHECK_EXCEPTION;
186 env->DeleteLocalRef(thread);
187 env->DeleteLocalRef(threadList);
188 }
189
190 // add load objects
191 n = get_num_libs(ph);
192 for (i = 0; i < n; i++) {
193 uintptr_t base, memsz;
194 const char* name;
195 jobject loadObject;
196 jobject loadObjectList;
197 jstring str;
198
199 get_lib_addr_range(ph, i, &base, &memsz);
200 name = get_lib_name(ph, i);
201
202 str = env->NewStringUTF(name);
203 CHECK_EXCEPTION;
204 loadObject = env->CallObjectMethod(this_obj, createLoadObject_ID, str, (jlong)memsz, (jlong)base);
205 CHECK_EXCEPTION;
206 loadObjectList = env->GetObjectField(this_obj, loadObjectList_ID);
207 CHECK_EXCEPTION;
208 env->CallBooleanMethod(loadObjectList, listAdd_ID, loadObject);
209 CHECK_EXCEPTION;
210 env->DeleteLocalRef(str);
211 env->DeleteLocalRef(loadObject);
212 env->DeleteLocalRef(loadObjectList);
213 }
214 }
215
216
217 /*
218 * Verify that a named ELF binary file (core or executable) has the same
219 * bitness as ourselves.
220 * Throw an exception if there is a mismatch or other problem.
221 *
222 * If we proceed using a mismatched debugger/debuggee, the best to hope
223 * for is a missing symbol, the worst is a crash searching for debug symbols.
224 */
225 void verifyBitness(JNIEnv *env, const char *binaryName) {
226 int fd = open(binaryName, O_RDONLY);
227 if (fd < 0) {
228 THROW_NEW_DEBUGGER_EXCEPTION("cannot open binary file");
229 }
230 unsigned char elf_ident[EI_NIDENT];
231 int i = read(fd, &elf_ident, sizeof(elf_ident));
232 close(fd);
233
234 if (i < 0) {
235 THROW_NEW_DEBUGGER_EXCEPTION("cannot read binary file");
236 }
237 #ifndef _LP64
238 if (elf_ident[EI_CLASS] == ELFCLASS64) {
239 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 64 bit, use 64-bit java for debugger");
240 }
241 #else
242 if (elf_ident[EI_CLASS] != ELFCLASS64) {
243 THROW_NEW_DEBUGGER_EXCEPTION("debuggee is 32 bit, use 32 bit java for debugger");
244 }
245 #endif
246 }
247
248
249 /*
250 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
251 * Method: setSAAltRoot0
252 * Signature: (Ljava/lang/String;)V
253 */
254 extern "C"
255 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_setSAAltRoot0
256 (JNIEnv *env, jobject this_obj, jstring altroot) {
257 if (saaltroot != NULL) {
258 free(saaltroot);
259 }
260 const char *path = env->GetStringUTFChars(altroot, NULL);
261 if (path == NULL) { return; }
262 /*
263 * `saaltroot` is used for putenv().
264 * So we need to keep this memory.
265 */
266 static const char *PREFIX = "SA_ALTROOT=";
267 size_t len = strlen(PREFIX) + strlen(path) + 1;
268 saaltroot = (char *)malloc(len);
269 snprintf(saaltroot, len, "%s%s", PREFIX, path);
270 putenv(saaltroot);
271 env->ReleaseStringUTFChars(altroot, path);
272 }
273
274 /*
275 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
276 * Method: attach0
277 * Signature: (I)V
278 */
279 extern "C"
280 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_attach0__I
281 (JNIEnv *env, jobject this_obj, jint jpid) {
282
283 // For bitness checking, locate binary at /proc/jpid/exe
284 char buf[PATH_MAX];
285 snprintf((char *) &buf, PATH_MAX, "/proc/%d/exe", jpid);
286 verifyBitness(env, (char *) &buf);
287 CHECK_EXCEPTION;
288
289 char err_buf[200];
290 struct ps_prochandle* ph;
291 if ((ph = Pgrab(jpid, err_buf, sizeof(err_buf))) == NULL) {
292 char msg[230];
293 snprintf(msg, sizeof(msg), "Can't attach to the process: %s", err_buf);
294 THROW_NEW_DEBUGGER_EXCEPTION(msg);
295 }
296 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph);
297 fillThreadsAndLoadObjects(env, this_obj, ph);
298 }
299
300 /*
301 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
302 * Method: attach0
303 * Signature: (Ljava/lang/String;Ljava/lang/String;)V
304 */
305 extern "C"
306 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_attach0__Ljava_lang_String_2Ljava_lang_String_2
307 (JNIEnv *env, jobject this_obj, jstring execName, jstring coreName) {
308 struct ps_prochandle* ph;
309 AutoJavaString execName_cstr(env, execName);
310 CHECK_EXCEPTION;
311 AutoJavaString coreName_cstr(env, coreName);
312 CHECK_EXCEPTION;
313
314 verifyBitness(env, execName_cstr);
315 CHECK_EXCEPTION;
316
317 if ( (ph = Pgrab_core(execName_cstr, coreName_cstr)) == NULL) {
318 THROW_NEW_DEBUGGER_EXCEPTION("Can't attach to the core file");
319 }
320 env->SetLongField(this_obj, p_ps_prochandle_ID, (jlong)(intptr_t)ph);
321 fillThreadsAndLoadObjects(env, this_obj, ph);
322 }
323
324 /*
325 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
326 * Method: detach0
327 * Signature: ()V
328 */
329 extern "C"
330 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_detach0
331 (JNIEnv *env, jobject this_obj) {
332 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
333 if (ph != NULL) {
334 Prelease(ph);
335 }
336 if (saaltroot != NULL) {
337 free(saaltroot);
338 saaltroot = NULL;
339 }
340 }
341
342 /*
343 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
344 * Method: lookupByName0
345 * Signature: (Ljava/lang/String;Ljava/lang/String;)J
346 */
347 extern "C"
348 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_lookupByName0
349 (JNIEnv *env, jobject this_obj, jstring objectName, jstring symbolName) {
350 jlong addr;
351 jboolean isCopy;
352 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
353 // Note, objectName is ignored, and may in fact be NULL.
354 // lookup_symbol will always search all objects/libs
355 AutoJavaString objectName_cstr(env, objectName);
356 CHECK_EXCEPTION_(0);
357 AutoJavaString symbolName_cstr(env, symbolName);
358 CHECK_EXCEPTION_(0);
359
360 addr = (jlong) lookup_symbol(ph, NULL, symbolName_cstr);
361 return addr;
362 }
363
364 /*
365 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
366 * Method: lookupByAddress0
367 * Signature: (J)Lsun/jvm/hotspot/debugger/cdbg/ClosestSymbol;
368 */
369 extern "C"
370 JNIEXPORT jobject JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_lookupByAddress0
371 (JNIEnv *env, jobject this_obj, jlong addr) {
372 uintptr_t offset;
373 jobject obj;
374 jstring str;
375 const char* sym = NULL;
376
377 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
378 sym = symbol_for_pc(ph, (uintptr_t) addr, &offset);
379 if (sym == NULL) return 0;
380 str = env->NewStringUTF(sym);
381 CHECK_EXCEPTION_(NULL);
382 obj = env->CallObjectMethod(this_obj, createClosestSymbol_ID, str, (jlong)offset);
383 CHECK_EXCEPTION_(NULL);
384 return obj;
385 }
386
387 /*
388 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
389 * Method: readBytesFromProcess0
390 * Signature: (JJ)Lsun/jvm/hotspot/debugger/ReadResult;
391 */
392 extern "C"
393 JNIEXPORT jbyteArray JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_readBytesFromProcess0
394 (JNIEnv *env, jobject this_obj, jlong addr, jlong numBytes) {
395
396 jboolean isCopy;
397 jbyteArray array;
398 jbyte *bufPtr;
399 ps_err_e err;
400
401 array = env->NewByteArray(numBytes);
402 CHECK_EXCEPTION_(0);
403 bufPtr = env->GetByteArrayElements(array, &isCopy);
404 CHECK_EXCEPTION_(0);
405
406 err = ps_pdread(get_proc_handle(env, this_obj), (psaddr_t) (uintptr_t)addr, bufPtr, numBytes);
407 env->ReleaseByteArrayElements(array, bufPtr, 0);
408 return (err == PS_OK)? array : 0;
409 }
410
411 #if defined(i586) || defined(amd64) || defined(ppc64) || defined(ppc64le) || defined(aarch64)
412 extern "C"
413 JNIEXPORT jlongArray JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_getThreadIntegerRegisterSet0
414 (JNIEnv *env, jobject this_obj, jint lwp_id) {
415
416 struct user_regs_struct gregs;
417 jboolean isCopy;
418 jlongArray array;
419 jlong *regs;
420 int i;
421
422 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
423 if (get_lwp_regs(ph, lwp_id, &gregs) != true) {
424 // This is not considered fatal and does happen on occassion, usually with an
425 // ESRCH error. The root cause is not fully understood, but by ignoring this error
426 // and returning NULL, stacking walking code will get null registers and fallback
427 // to using the "last java frame" if setup.
428 fprintf(stdout, "WARNING: getThreadIntegerRegisterSet0: get_lwp_regs failed for lwp (%d)\n", lwp_id);
429 fflush(stdout);
430 return NULL;
431 }
432
433 #undef NPRGREG
434 #ifdef i586
435 #define NPRGREG sun_jvm_hotspot_debugger_x86_X86ThreadContext_NPRGREG
436 #endif
437 #ifdef amd64
438 #define NPRGREG sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_NPRGREG
439 #endif
440 #ifdef aarch64
441 #define NPRGREG sun_jvm_hotspot_debugger_aarch64_AARCH64ThreadContext_NPRGREG
442 #endif
443 #if defined(ppc64) || defined(ppc64le)
444 #define NPRGREG sun_jvm_hotspot_debugger_ppc64_PPC64ThreadContext_NPRGREG
445 #endif
446
447
448 array = env->NewLongArray(NPRGREG);
449 CHECK_EXCEPTION_(0);
450 regs = env->GetLongArrayElements(array, &isCopy);
451
452 #undef REG_INDEX
453
454 #ifdef i586
455 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_x86_X86ThreadContext_##reg
456
457 regs[REG_INDEX(GS)] = (uintptr_t) gregs.xgs;
458 regs[REG_INDEX(FS)] = (uintptr_t) gregs.xfs;
459 regs[REG_INDEX(ES)] = (uintptr_t) gregs.xes;
460 regs[REG_INDEX(DS)] = (uintptr_t) gregs.xds;
461 regs[REG_INDEX(EDI)] = (uintptr_t) gregs.edi;
462 regs[REG_INDEX(ESI)] = (uintptr_t) gregs.esi;
463 regs[REG_INDEX(FP)] = (uintptr_t) gregs.ebp;
464 regs[REG_INDEX(SP)] = (uintptr_t) gregs.esp;
465 regs[REG_INDEX(EBX)] = (uintptr_t) gregs.ebx;
466 regs[REG_INDEX(EDX)] = (uintptr_t) gregs.edx;
467 regs[REG_INDEX(ECX)] = (uintptr_t) gregs.ecx;
468 regs[REG_INDEX(EAX)] = (uintptr_t) gregs.eax;
469 regs[REG_INDEX(PC)] = (uintptr_t) gregs.eip;
470 regs[REG_INDEX(CS)] = (uintptr_t) gregs.xcs;
471 regs[REG_INDEX(SS)] = (uintptr_t) gregs.xss;
472
473 #endif /* i586 */
474
475 #ifdef amd64
476 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext_##reg
477
478 regs[REG_INDEX(R15)] = gregs.r15;
479 regs[REG_INDEX(R14)] = gregs.r14;
480 regs[REG_INDEX(R13)] = gregs.r13;
481 regs[REG_INDEX(R12)] = gregs.r12;
482 regs[REG_INDEX(RBP)] = gregs.rbp;
483 regs[REG_INDEX(RBX)] = gregs.rbx;
484 regs[REG_INDEX(R11)] = gregs.r11;
485 regs[REG_INDEX(R10)] = gregs.r10;
486 regs[REG_INDEX(R9)] = gregs.r9;
487 regs[REG_INDEX(R8)] = gregs.r8;
488 regs[REG_INDEX(RAX)] = gregs.rax;
489 regs[REG_INDEX(RCX)] = gregs.rcx;
490 regs[REG_INDEX(RDX)] = gregs.rdx;
491 regs[REG_INDEX(RSI)] = gregs.rsi;
492 regs[REG_INDEX(RDI)] = gregs.rdi;
493 regs[REG_INDEX(RIP)] = gregs.rip;
494 regs[REG_INDEX(CS)] = gregs.cs;
495 regs[REG_INDEX(RSP)] = gregs.rsp;
496 regs[REG_INDEX(SS)] = gregs.ss;
497 regs[REG_INDEX(FSBASE)] = gregs.fs_base;
498 regs[REG_INDEX(GSBASE)] = gregs.gs_base;
499 regs[REG_INDEX(DS)] = gregs.ds;
500 regs[REG_INDEX(ES)] = gregs.es;
501 regs[REG_INDEX(FS)] = gregs.fs;
502 regs[REG_INDEX(GS)] = gregs.gs;
503
504 #endif /* amd64 */
505
506 #if defined(aarch64)
507
508 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_aarch64_AARCH64ThreadContext_##reg
509
510 {
511 int i;
512 for (i = 0; i < 31; i++)
513 regs[i] = gregs.regs[i];
514 regs[REG_INDEX(SP)] = gregs.sp;
515 regs[REG_INDEX(PC)] = gregs.pc;
516 }
517 #endif /* aarch64 */
518
519 #if defined(ppc64) || defined(ppc64le)
520 #define REG_INDEX(reg) sun_jvm_hotspot_debugger_ppc64_PPC64ThreadContext_##reg
521
522 regs[REG_INDEX(LR)] = gregs.link;
523 regs[REG_INDEX(NIP)] = gregs.nip;
524 regs[REG_INDEX(R0)] = gregs.gpr[0];
525 regs[REG_INDEX(R1)] = gregs.gpr[1];
526 regs[REG_INDEX(R2)] = gregs.gpr[2];
527 regs[REG_INDEX(R3)] = gregs.gpr[3];
528 regs[REG_INDEX(R4)] = gregs.gpr[4];
529 regs[REG_INDEX(R5)] = gregs.gpr[5];
530 regs[REG_INDEX(R6)] = gregs.gpr[6];
531 regs[REG_INDEX(R7)] = gregs.gpr[7];
532 regs[REG_INDEX(R8)] = gregs.gpr[8];
533 regs[REG_INDEX(R9)] = gregs.gpr[9];
534 regs[REG_INDEX(R10)] = gregs.gpr[10];
535 regs[REG_INDEX(R11)] = gregs.gpr[11];
536 regs[REG_INDEX(R12)] = gregs.gpr[12];
537 regs[REG_INDEX(R13)] = gregs.gpr[13];
538 regs[REG_INDEX(R14)] = gregs.gpr[14];
539 regs[REG_INDEX(R15)] = gregs.gpr[15];
540 regs[REG_INDEX(R16)] = gregs.gpr[16];
541 regs[REG_INDEX(R17)] = gregs.gpr[17];
542 regs[REG_INDEX(R18)] = gregs.gpr[18];
543 regs[REG_INDEX(R19)] = gregs.gpr[19];
544 regs[REG_INDEX(R20)] = gregs.gpr[20];
545 regs[REG_INDEX(R21)] = gregs.gpr[21];
546 regs[REG_INDEX(R22)] = gregs.gpr[22];
547 regs[REG_INDEX(R23)] = gregs.gpr[23];
548 regs[REG_INDEX(R24)] = gregs.gpr[24];
549 regs[REG_INDEX(R25)] = gregs.gpr[25];
550 regs[REG_INDEX(R26)] = gregs.gpr[26];
551 regs[REG_INDEX(R27)] = gregs.gpr[27];
552 regs[REG_INDEX(R28)] = gregs.gpr[28];
553 regs[REG_INDEX(R29)] = gregs.gpr[29];
554 regs[REG_INDEX(R30)] = gregs.gpr[30];
555 regs[REG_INDEX(R31)] = gregs.gpr[31];
556
557 #endif
558
559 env->ReleaseLongArrayElements(array, regs, JNI_COMMIT);
560 return array;
561 }
562 #endif
563
564 /*
565 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
566 * Method: demangle
567 * Signature: (Ljava/lang/String;)Ljava/lang/String;
568 */
569 extern "C"
570 JNIEXPORT jstring JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_demangle
571 (JNIEnv *env, jobject this_obj, jstring jsym) {
572 int status;
573 jstring result = NULL;
574
575 const char *sym = env->GetStringUTFChars(jsym, NULL);
576 if (sym == NULL) {
577 THROW_NEW_DEBUGGER_EXCEPTION_("Error getting symbol string", NULL);
578 }
579 char *demangled = abi::__cxa_demangle(sym, NULL, 0, &status);
580 env->ReleaseStringUTFChars(jsym, sym);
581 if ((demangled != NULL) && (status == 0)) {
582 result = env->NewStringUTF(demangled);
583 free(demangled);
584 } else if (status == -2) { // not C++ ABI mangling rules - maybe C style
585 result = jsym;
586 } else {
587 THROW_NEW_DEBUGGER_EXCEPTION_("Could not demangle", NULL);
588 }
589
590 return result;
591 }
592
593 /*
594 * Class: sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal
595 * Method: findLibPtrByAddress0
596 * Signature: (J)J
597 */
598 extern "C"
599 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_findLibPtrByAddress0
600 (JNIEnv *env, jobject this_obj, jlong pc) {
601 struct ps_prochandle* ph = get_proc_handle(env, this_obj);
602 return reinterpret_cast<jlong>(find_lib_by_address(ph, pc));
603 }