1 /*
2 * Copyright (c) 2000, 2012, 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 package sun.jvm.hotspot;
26
27 import java.io.PrintStream;
28 import java.net.*;
29 import java.rmi.*;
30 import sun.jvm.hotspot.debugger.*;
31 import sun.jvm.hotspot.debugger.bsd.*;
32 import sun.jvm.hotspot.debugger.proc.*;
33 import sun.jvm.hotspot.debugger.remote.*;
34 import sun.jvm.hotspot.debugger.windbg.*;
35 import sun.jvm.hotspot.debugger.linux.*;
36 import sun.jvm.hotspot.memory.*;
37 import sun.jvm.hotspot.oops.*;
38 import sun.jvm.hotspot.runtime.*;
39 import sun.jvm.hotspot.types.*;
40 import sun.jvm.hotspot.utilities.*;
41
42 /** <P> This class wraps much of the basic functionality and is the
43 * highest-level factory for VM data structures. It makes it simple
44 * to start up the debugging system. </P>
45 *
46 * <P> FIXME: especially with the addition of remote debugging, this
47 * has turned into a mess; needs rethinking. </P>
48 */
49
50 public class HotSpotAgent {
51 private JVMDebugger debugger;
52 private MachineDescription machDesc;
53 private TypeDataBase db;
54
55 private String os;
56 private String cpu;
57 private String fileSep;
58
59 // The system can work in several ways:
60 // - Attaching to local process
61 // - Attaching to local core file
62 // - Connecting to remote debug server
63 // - Starting debug server for process
64 // - Starting debug server for core file
65
66 // These are options for the "client" side of things
67 private static final int PROCESS_MODE = 0;
68 private static final int CORE_FILE_MODE = 1;
69 private static final int REMOTE_MODE = 2;
70 private int startupMode;
71
72 // This indicates whether we are really starting a server or not
73 private boolean isServer;
74
75 // All possible required information for connecting
76 private int pid;
77 private String javaExecutableName;
78 private String coreFileName;
79 private String debugServerID;
80
81 // All needed information for server side
82 private String serverID;
83
84 private String[] jvmLibNames;
85
86 static void showUsage() {
87 }
88
89 public HotSpotAgent() {
90 // for non-server add shutdown hook to clean-up debugger in case
91 // of forced exit. For remote server, shutdown hook is added by
92 // DebugServer.
93 Runtime.getRuntime().addShutdownHook(new java.lang.Thread(
94 new Runnable() {
95 public void run() {
96 synchronized (HotSpotAgent.this) {
97 if (!isServer) {
98 detach();
99 }
100 }
101 }
102 }));
103 }
104
105 //--------------------------------------------------------------------------------
106 // Accessors (once the system is set up)
107 //
108
109 public synchronized Debugger getDebugger() {
110 return debugger;
111 }
112
113 public synchronized TypeDataBase getTypeDataBase() {
114 return db;
115 }
116
117 //--------------------------------------------------------------------------------
118 // Client-side operations
119 //
120
121 /** This attaches to a process running on the local machine. */
122 public synchronized void attach(int processID)
123 throws DebuggerException {
124 if (debugger != null) {
125 throw new DebuggerException("Already attached");
126 }
127 pid = processID;
128 startupMode = PROCESS_MODE;
129 isServer = false;
130 go();
131 }
132
133 /** This opens a core file on the local machine */
134 public synchronized void attach(String javaExecutableName, String coreFileName)
135 throws DebuggerException {
136 if (debugger != null) {
137 throw new DebuggerException("Already attached");
138 }
139 if ((javaExecutableName == null) || (coreFileName == null)) {
140 throw new DebuggerException("Both the core file name and Java executable name must be specified");
141 }
142 this.javaExecutableName = javaExecutableName;
143 this.coreFileName = coreFileName;
144 startupMode = CORE_FILE_MODE;
145 isServer = false;
146 go();
147 }
148
149 /** This attaches to a "debug server" on a remote machine; this
150 remote server has already attached to a process or opened a
151 core file and is waiting for RMI calls on the Debugger object to
152 come in. */
153 public synchronized void attach(String remoteServerID)
154 throws DebuggerException {
155 if (debugger != null) {
156 throw new DebuggerException("Already attached to a process");
157 }
158 if (remoteServerID == null) {
159 throw new DebuggerException("Debug server id must be specified");
160 }
161
162 debugServerID = remoteServerID;
163 startupMode = REMOTE_MODE;
164 isServer = false;
165 go();
166 }
167
168 /** This should only be called by the user on the client machine,
169 not the server machine */
170 public synchronized boolean detach() throws DebuggerException {
171 if (isServer) {
172 throw new DebuggerException("Should not call detach() for server configuration");
173 }
174 return detachInternal();
175 }
176
177 //--------------------------------------------------------------------------------
178 // Server-side operations
179 //
180
181 /** This attaches to a process running on the local machine and
182 starts a debug server, allowing remote machines to connect and
183 examine this process. Uses specified name to uniquely identify a
184 specific debuggee on the server */
185 public synchronized void startServer(int processID, String uniqueID) {
186 if (debugger != null) {
187 throw new DebuggerException("Already attached");
188 }
189 pid = processID;
190 startupMode = PROCESS_MODE;
191 isServer = true;
192 serverID = uniqueID;
193 go();
194 }
195
196 /** This attaches to a process running on the local machine and
197 starts a debug server, allowing remote machines to connect and
198 examine this process. */
199 public synchronized void startServer(int processID)
200 throws DebuggerException {
201 startServer(processID, null);
202 }
203
204 /** This opens a core file on the local machine and starts a debug
205 server, allowing remote machines to connect and examine this
206 core file. Uses supplied uniqueID to uniquely identify a specific
207 debugee */
208 public synchronized void startServer(String javaExecutableName,
209 String coreFileName,
210 String uniqueID) {
211 if (debugger != null) {
212 throw new DebuggerException("Already attached");
213 }
214 if ((javaExecutableName == null) || (coreFileName == null)) {
215 throw new DebuggerException("Both the core file name and Java executable name must be specified");
216 }
217 this.javaExecutableName = javaExecutableName;
218 this.coreFileName = coreFileName;
219 startupMode = CORE_FILE_MODE;
220 isServer = true;
221 serverID = uniqueID;
222 go();
223 }
224
225 /** This opens a core file on the local machine and starts a debug
226 server, allowing remote machines to connect and examine this
227 core file. */
228 public synchronized void startServer(String javaExecutableName, String coreFileName)
229 throws DebuggerException {
230 startServer(javaExecutableName, coreFileName, null);
231 }
232
233 /** This may only be called on the server side after startServer()
234 has been called */
235 public synchronized boolean shutdownServer() throws DebuggerException {
236 if (!isServer) {
237 throw new DebuggerException("Should not call shutdownServer() for client configuration");
238 }
239 return detachInternal();
240 }
241
242
243 //--------------------------------------------------------------------------------
244 // Internals only below this point
245 //
246
247 private boolean detachInternal() {
248 if (debugger == null) {
249 return false;
250 }
251 boolean retval = true;
252 if (!isServer) {
253 VM.shutdown();
254 }
255 // We must not call detach() if we are a client and are connected
256 // to a remote debugger
257 Debugger dbg = null;
258 DebuggerException ex = null;
259 if (isServer) {
260 try {
261 RMIHelper.unbind(serverID);
262 }
263 catch (DebuggerException de) {
264 ex = de;
265 }
266 dbg = debugger;
267 } else {
268 if (startupMode != REMOTE_MODE) {
269 dbg = debugger;
270 }
271 }
272 if (dbg != null) {
273 retval = dbg.detach();
274 }
275
276 debugger = null;
277 machDesc = null;
278 db = null;
279 if (ex != null) {
280 throw(ex);
281 }
282 return retval;
283 }
284
285 private void go() {
286 setupDebugger();
287 setupVM();
288 }
289
290 private void setupDebugger() {
291 if (startupMode != REMOTE_MODE) {
292 //
293 // Local mode (client attaching to local process or setting up
294 // server, but not client attaching to server)
295 //
296
297 try {
298 os = PlatformInfo.getOS();
299 cpu = PlatformInfo.getCPU();
300 }
301 catch (UnsupportedPlatformException e) {
302 throw new DebuggerException(e);
303 }
304 fileSep = System.getProperty("file.separator");
305
306 if (os.equals("solaris")) {
307 setupDebuggerSolaris();
308 } else if (os.equals("win32")) {
309 setupDebuggerWin32();
310 } else if (os.equals("linux")) {
311 setupDebuggerLinux();
312 } else if (os.equals("bsd")) {
313 setupDebuggerBsd();
314 } else {
315 // Add support for more operating systems here
316 throw new DebuggerException("Operating system " + os + " not yet supported");
317 }
318
319 if (isServer) {
320 RemoteDebuggerServer remote = null;
321 try {
322 remote = new RemoteDebuggerServer(debugger);
323 }
324 catch (RemoteException rem) {
325 throw new DebuggerException(rem);
326 }
327 RMIHelper.rebind(serverID, remote);
328 }
329 } else {
330 //
331 // Remote mode (client attaching to server)
332 //
333
334 // Create and install a security manager
335
336 // FIXME: currently commented out because we were having
337 // security problems since we're "in the sun.* hierarchy" here.
338 // Perhaps a permissive policy file would work around this. In
339 // the long run, will probably have to move into com.sun.*.
340
341 // if (System.getSecurityManager() == null) {
342 // System.setSecurityManager(new RMISecurityManager());
343 // }
344
345 connectRemoteDebugger();
346 }
347 }
348
349 private void setupVM() {
350 // We need to instantiate a HotSpotTypeDataBase on both the client
351 // and server machine. On the server it is only currently used to
352 // configure the Java primitive type sizes (which we should
353 // consider making constant). On the client it is used to
354 // configure the VM.
355
356 try {
357 if (os.equals("solaris")) {
358 db = new HotSpotTypeDataBase(machDesc,
359 new HotSpotSolarisVtblAccess(debugger, jvmLibNames),
360 debugger, jvmLibNames);
361 } else if (os.equals("win32")) {
362 db = new HotSpotTypeDataBase(machDesc,
363 new Win32VtblAccess(debugger, jvmLibNames),
364 debugger, jvmLibNames);
365 } else if (os.equals("linux")) {
366 db = new HotSpotTypeDataBase(machDesc,
367 new LinuxVtblAccess(debugger, jvmLibNames),
368 debugger, jvmLibNames);
369 } else if (os.equals("bsd")) {
370 db = new HotSpotTypeDataBase(machDesc,
371 new BsdVtblAccess(debugger, jvmLibNames),
372 debugger, jvmLibNames);
373 } else {
374 throw new DebuggerException("OS \"" + os + "\" not yet supported (no VtblAccess yet)");
375 }
376 }
377 catch (NoSuchSymbolException e) {
378 throw new DebuggerException("Doesn't appear to be a HotSpot VM (could not find symbol \"" +
379 e.getSymbol() + "\" in remote process)");
380 }
381
382 if (startupMode != REMOTE_MODE) {
383 // Configure the debugger with the primitive type sizes just obtained from the VM
384 debugger.configureJavaPrimitiveTypeSizes(db.getJBooleanType().getSize(),
385 db.getJByteType().getSize(),
386 db.getJCharType().getSize(),
387 db.getJDoubleType().getSize(),
388 db.getJFloatType().getSize(),
389 db.getJIntType().getSize(),
390 db.getJLongType().getSize(),
391 db.getJShortType().getSize());
392 }
393
394 if (!isServer) {
395 // Do not initialize the VM on the server (unnecessary, since it's
396 // instantiated on the client)
397 try {
398 VM.initialize(db, debugger);
399 } catch (DebuggerException e) {
400 throw (e);
401 } catch (Exception e) {
402 throw new DebuggerException(e);
403 }
404 }
405 }
406
407 //--------------------------------------------------------------------------------
408 // OS-specific debugger setup/connect routines
409 //
410
411 //
412 // Solaris
413 //
414
415 private void setupDebuggerSolaris() {
416 setupJVMLibNamesSolaris();
417 ProcDebuggerLocal dbg = new ProcDebuggerLocal(null, true);
418 debugger = dbg;
419 attachDebugger();
420
421 // Set up CPU-dependent stuff
422 if (cpu.equals("x86")) {
423 machDesc = new MachineDescriptionIntelX86();
424 } else if (cpu.equals("sparc")) {
425 int addressSize = dbg.getRemoteProcessAddressSize();
426 if (addressSize == -1) {
427 throw new DebuggerException("Error occurred while trying to determine the remote process's " +
428 "address size");
429 }
430
431 if (addressSize == 32) {
432 machDesc = new MachineDescriptionSPARC32Bit();
433 } else if (addressSize == 64) {
434 machDesc = new MachineDescriptionSPARC64Bit();
435 } else {
436 throw new DebuggerException("Address size " + addressSize + " is not supported on SPARC");
437 }
438 } else if (cpu.equals("amd64")) {
439 machDesc = new MachineDescriptionAMD64();
440 } else {
441 throw new DebuggerException("Solaris only supported on sparc/sparcv9/x86/amd64");
442 }
443
444 dbg.setMachineDescription(machDesc);
445 return;
446 }
447
448 private void connectRemoteDebugger() throws DebuggerException {
449 RemoteDebugger remote =
450 (RemoteDebugger) RMIHelper.lookup(debugServerID);
451 debugger = new RemoteDebuggerClient(remote);
452 machDesc = ((RemoteDebuggerClient) debugger).getMachineDescription();
453 os = debugger.getOS();
454 if (os.equals("solaris")) {
455 setupJVMLibNamesSolaris();
456 } else if (os.equals("win32")) {
457 setupJVMLibNamesWin32();
458 } else if (os.equals("linux")) {
459 setupJVMLibNamesLinux();
460 } else if (os.equals("bsd")) {
461 setupJVMLibNamesBsd();
462 } else {
463 throw new RuntimeException("Unknown OS type");
464 }
465
466 cpu = debugger.getCPU();
467 }
468
469 private void setupJVMLibNamesSolaris() {
470 jvmLibNames = new String[] { "libjvm.so", "libjvm_g.so", "gamma_g" };
471 }
472
473 //
474 // Win32
475 //
476
477 private void setupDebuggerWin32() {
478 setupJVMLibNamesWin32();
479
480 if (cpu.equals("x86")) {
481 machDesc = new MachineDescriptionIntelX86();
482 } else if (cpu.equals("amd64")) {
483 machDesc = new MachineDescriptionAMD64();
484 } else if (cpu.equals("ia64")) {
485 machDesc = new MachineDescriptionIA64();
486 } else {
487 throw new DebuggerException("Win32 supported under x86, amd64 and ia64 only");
488 }
489
490 // Note we do not use a cache for the local debugger in server
491 // mode; it will be taken care of on the client side (once remote
492 // debugging is implemented).
493
494 debugger = new WindbgDebuggerLocal(machDesc, !isServer);
495
496 attachDebugger();
497
498 // FIXME: add support for server mode
499 }
500
501 private void setupJVMLibNamesWin32() {
502 jvmLibNames = new String[] { "jvm.dll", "jvm_g.dll" };
503 }
504
505 //
506 // Linux
507 //
508
509 private void setupDebuggerLinux() {
510 setupJVMLibNamesLinux();
511
512 if (cpu.equals("x86")) {
513 machDesc = new MachineDescriptionIntelX86();
514 } else if (cpu.equals("ia64")) {
515 machDesc = new MachineDescriptionIA64();
516 } else if (cpu.equals("amd64")) {
517 machDesc = new MachineDescriptionAMD64();
518 } else if (cpu.equals("sparc")) {
519 if (LinuxDebuggerLocal.getAddressSize()==8) {
520 machDesc = new MachineDescriptionSPARC64Bit();
521 } else {
522 machDesc = new MachineDescriptionSPARC32Bit();
523 }
524 } else {
525 try {
526 machDesc = (MachineDescription)
527 Class.forName("sun.jvm.hotspot.debugger.MachineDescription" +
528 cpu.toUpperCase()).newInstance();
529 } catch (Exception e) {
530 throw new DebuggerException("Linux not supported on machine type " + cpu);
531 }
532 }
533
534 LinuxDebuggerLocal dbg =
535 new LinuxDebuggerLocal(machDesc, !isServer);
536 debugger = dbg;
537
538 attachDebugger();
539 }
540
541 private void setupJVMLibNamesLinux() {
542 jvmLibNames = new String[] { "libjvm.so", "libjvm_g.so" };
543 }
544
545 //
546 // BSD
547 //
548
549 private void setupDebuggerBsd() {
550 setupJVMLibNamesBsd();
551
552 if (cpu.equals("x86")) {
553 machDesc = new MachineDescriptionIntelX86();
554 } else if (cpu.equals("amd64") || cpu.equals("x86_64")) {
555 machDesc = new MachineDescriptionAMD64();
556 } else {
557 throw new DebuggerException("BSD only supported on x86/x86_64. Current arch: " + cpu);
558 }
559
560 BsdDebuggerLocal dbg = new BsdDebuggerLocal(machDesc, !isServer);
561 debugger = dbg;
562
563 attachDebugger();
564 }
565
566 private void setupJVMLibNamesBsd() {
567 jvmLibNames = new String[] { "libjvm.so", "libjvm_g.so" };
568 }
569
570 /** Convenience routine which should be called by per-platform
571 debugger setup. Should not be called when startupMode is
572 REMOTE_MODE. */
573 private void attachDebugger() {
574 if (startupMode == PROCESS_MODE) {
575 debugger.attach(pid);
576 } else if (startupMode == CORE_FILE_MODE) {
577 debugger.attach(javaExecutableName, coreFileName);
578 } else {
579 throw new DebuggerException("Should not call attach() for startupMode == " + startupMode);
580 }
581 }
582 }