Mercurial > hg > truffle
annotate src/share/vm/utilities/debug.cpp @ 8710:9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
Summary: Detect the execstack attribute of the loaded library and attempt to fix the stack guard using Safepoint op.
Reviewed-by: dholmes, zgu
Contributed-by: ioi.lam@oracle.com
author | iklam |
---|---|
date | Tue, 05 Mar 2013 13:55:56 -0800 |
parents | b6d5b3e50379 |
children | 5fc51c1ecdeb be4d5c6c1f79 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/codeCache.hpp" | |
28 #include "code/icBuffer.hpp" | |
29 #include "code/nmethod.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "compiler/compileBroker.hpp" | |
32 #include "compiler/disassembler.hpp" | |
33 #include "gc_implementation/shared/markSweep.hpp" | |
34 #include "gc_interface/collectedHeap.hpp" | |
35 #include "interpreter/bytecodeHistogram.hpp" | |
36 #include "interpreter/interpreter.hpp" | |
37 #include "memory/resourceArea.hpp" | |
38 #include "memory/universe.hpp" | |
39 #include "oops/oop.inline.hpp" | |
40 #include "prims/privilegedStack.hpp" | |
41 #include "runtime/arguments.hpp" | |
42 #include "runtime/frame.hpp" | |
43 #include "runtime/java.hpp" | |
44 #include "runtime/sharedRuntime.hpp" | |
45 #include "runtime/stubCodeGenerator.hpp" | |
46 #include "runtime/stubRoutines.hpp" | |
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47 #include "runtime/thread.inline.hpp" |
1972 | 48 #include "runtime/vframe.hpp" |
49 #include "services/heapDumper.hpp" | |
50 #include "utilities/defaultStream.hpp" | |
51 #include "utilities/events.hpp" | |
52 #include "utilities/top.hpp" | |
53 #include "utilities/vmError.hpp" | |
54 #ifdef TARGET_OS_FAMILY_linux | |
55 # include "os_linux.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_OS_FAMILY_solaris | |
58 # include "os_solaris.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_OS_FAMILY_windows | |
61 # include "os_windows.inline.hpp" | |
62 #endif | |
3960 | 63 #ifdef TARGET_OS_FAMILY_bsd |
64 # include "os_bsd.inline.hpp" | |
65 #endif | |
0 | 66 |
67 #ifndef ASSERT | |
68 # ifdef _DEBUG | |
69 // NOTE: don't turn the lines below into a comment -- if you're getting | |
70 // a compile error here, change the settings to define ASSERT | |
71 ASSERT should be defined when _DEBUG is defined. It is not intended to be used for debugging | |
72 functions that do not slow down the system too much and thus can be left in optimized code. | |
73 On the other hand, the code should not be included in a production version. | |
74 # endif // _DEBUG | |
75 #endif // ASSERT | |
76 | |
77 | |
78 #ifdef _DEBUG | |
79 # ifndef ASSERT | |
80 configuration error: ASSERT must be defined in debug version | |
81 # endif // ASSERT | |
82 #endif // _DEBUG | |
83 | |
84 | |
85 #ifdef PRODUCT | |
86 # if -defined _DEBUG || -defined ASSERT | |
87 configuration error: ASSERT et al. must not be defined in PRODUCT version | |
88 # endif | |
89 #endif // PRODUCT | |
90 | |
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91 FormatBufferResource::FormatBufferResource(const char * format, ...) |
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92 : FormatBufferBase((char*)resource_allocate_bytes(RES_BUFSZ)) { |
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93 va_list argp; |
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94 va_start(argp, format); |
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95 jio_vsnprintf(_buf, RES_BUFSZ, format, argp); |
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96 va_end(argp); |
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97 } |
0 | 98 |
99 void warning(const char* format, ...) { | |
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100 if (PrintWarnings) { |
6759 | 101 FILE* const err = defaultStream::error_stream(); |
102 jio_fprintf(err, "%s warning: ", VM_Version::vm_name()); | |
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103 va_list ap; |
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104 va_start(ap, format); |
6759 | 105 vfprintf(err, format, ap); |
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106 va_end(ap); |
6759 | 107 fputc('\n', err); |
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108 } |
0 | 109 if (BreakAtWarning) BREAKPOINT; |
110 } | |
111 | |
112 #ifndef PRODUCT | |
113 | |
114 #define is_token_break(ch) (isspace(ch) || (ch) == ',') | |
115 | |
116 static const char* last_file_name = NULL; | |
117 static int last_line_no = -1; | |
118 | |
119 // assert/guarantee/... may happen very early during VM initialization. | |
120 // Don't rely on anything that is initialized by Threads::create_vm(). For | |
121 // example, don't use tty. | |
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122 bool error_is_suppressed(const char* file_name, int line_no) { |
0 | 123 // The following 1-element cache requires that passed-in |
124 // file names are always only constant literals. | |
125 if (file_name == last_file_name && line_no == last_line_no) return true; | |
126 | |
127 int file_name_len = (int)strlen(file_name); | |
128 char separator = os::file_separator()[0]; | |
129 const char* base_name = strrchr(file_name, separator); | |
130 if (base_name == NULL) | |
131 base_name = file_name; | |
132 | |
133 // scan the SuppressErrorAt option | |
134 const char* cp = SuppressErrorAt; | |
135 for (;;) { | |
136 const char* sfile; | |
137 int sfile_len; | |
138 int sline; | |
139 bool noisy; | |
140 while ((*cp) != '\0' && is_token_break(*cp)) cp++; | |
141 if ((*cp) == '\0') break; | |
142 sfile = cp; | |
143 while ((*cp) != '\0' && !is_token_break(*cp) && (*cp) != ':') cp++; | |
144 sfile_len = cp - sfile; | |
145 if ((*cp) == ':') cp++; | |
146 sline = 0; | |
147 while ((*cp) != '\0' && isdigit(*cp)) { | |
148 sline *= 10; | |
149 sline += (*cp) - '0'; | |
150 cp++; | |
151 } | |
152 // "file:line!" means the assert suppression is not silent | |
153 noisy = ((*cp) == '!'); | |
154 while ((*cp) != '\0' && !is_token_break(*cp)) cp++; | |
155 // match the line | |
156 if (sline != 0) { | |
157 if (sline != line_no) continue; | |
158 } | |
159 // match the file | |
160 if (sfile_len > 0) { | |
161 const char* look = file_name; | |
162 const char* look_max = file_name + file_name_len - sfile_len; | |
163 const char* foundp; | |
164 bool match = false; | |
165 while (!match | |
166 && (foundp = strchr(look, sfile[0])) != NULL | |
167 && foundp <= look_max) { | |
168 match = true; | |
169 for (int i = 1; i < sfile_len; i++) { | |
170 if (sfile[i] != foundp[i]) { | |
171 match = false; | |
172 break; | |
173 } | |
174 } | |
175 look = foundp + 1; | |
176 } | |
177 if (!match) continue; | |
178 } | |
179 // got a match! | |
180 if (noisy) { | |
181 fdStream out(defaultStream::output_fd()); | |
182 out.print_raw("[error suppressed at "); | |
183 out.print_raw(base_name); | |
184 char buf[16]; | |
185 jio_snprintf(buf, sizeof(buf), ":%d]", line_no); | |
186 out.print_raw_cr(buf); | |
187 } else { | |
188 // update 1-element cache for fast silent matches | |
189 last_file_name = file_name; | |
190 last_line_no = line_no; | |
191 } | |
192 return true; | |
193 } | |
194 | |
195 if (!is_error_reported()) { | |
196 // print a friendly hint: | |
197 fdStream out(defaultStream::output_fd()); | |
198 out.print_raw_cr("# To suppress the following error report, specify this argument"); | |
199 out.print_raw ("# after -XX: or in .hotspotrc: SuppressErrorAt="); | |
200 out.print_raw (base_name); | |
201 char buf[16]; | |
202 jio_snprintf(buf, sizeof(buf), ":%d", line_no); | |
203 out.print_raw_cr(buf); | |
204 } | |
205 return false; | |
206 } | |
207 | |
208 #undef is_token_break | |
209 | |
210 #else | |
211 | |
212 // Place-holder for non-existent suppression check: | |
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213 #define error_is_suppressed(file_name, line_no) (false) |
0 | 214 |
4006 | 215 #endif // !PRODUCT |
0 | 216 |
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217 void report_vm_error(const char* file, int line, const char* error_msg, |
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218 const char* detail_msg) |
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219 { |
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220 if (Debugging || error_is_suppressed(file, line)) return; |
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221 Thread* const thread = ThreadLocalStorage::get_thread_slow(); |
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222 VMError err(thread, file, line, error_msg, detail_msg); |
0 | 223 err.report_and_die(); |
224 } | |
225 | |
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226 void report_fatal(const char* file, int line, const char* message) |
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227 { |
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228 report_vm_error(file, line, "fatal error", message); |
0 | 229 } |
230 | |
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231 void report_vm_out_of_memory(const char* file, int line, size_t size, |
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232 const char* message) { |
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233 if (Debugging) return; |
0 | 234 |
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235 Thread* thread = ThreadLocalStorage::get_thread_slow(); |
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236 VMError(thread, file, line, size, message).report_and_die(); |
0 | 237 |
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238 // The UseOSErrorReporting option in report_and_die() may allow a return |
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239 // to here. If so then we'll have to figure out how to handle it. |
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240 guarantee(false, "report_and_die() should not return here"); |
0 | 241 } |
242 | |
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243 void report_should_not_call(const char* file, int line) { |
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244 report_vm_error(file, line, "ShouldNotCall()"); |
0 | 245 } |
246 | |
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247 void report_should_not_reach_here(const char* file, int line) { |
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248 report_vm_error(file, line, "ShouldNotReachHere()"); |
0 | 249 } |
250 | |
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251 void report_should_not_reach_here2(const char* file, int line, const char* message) { |
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252 report_vm_error(file, line, "ShouldNotReachHere()", message); |
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253 } |
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254 |
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255 void report_unimplemented(const char* file, int line) { |
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256 report_vm_error(file, line, "Unimplemented()"); |
0 | 257 } |
258 | |
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259 void report_untested(const char* file, int line, const char* message) { |
0 | 260 #ifndef PRODUCT |
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261 warning("Untested: %s in %s: %d\n", message, file, line); |
4006 | 262 #endif // !PRODUCT |
0 | 263 } |
264 | |
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265 void report_out_of_shared_space(SharedSpaceType shared_space) { |
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266 static const char* name[] = { |
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267 "native memory for metadata", |
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268 "shared read only space", |
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269 "shared read write space", |
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270 "shared miscellaneous data space" |
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271 }; |
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272 static const char* flag[] = { |
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273 "Metaspace", |
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274 "SharedReadOnlySize", |
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275 "SharedReadWriteSize", |
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276 "SharedMiscDataSize" |
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277 }; |
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278 |
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279 warning("\nThe %s is not large enough\n" |
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280 "to preload requested classes. Use -XX:%s=\n" |
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281 "to increase the initial size of %s.\n", |
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282 name[shared_space], flag[shared_space], name[shared_space]); |
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283 exit(2); |
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284 } |
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285 |
0 | 286 void report_java_out_of_memory(const char* message) { |
287 static jint out_of_memory_reported = 0; | |
288 | |
289 // A number of threads may attempt to report OutOfMemoryError at around the | |
290 // same time. To avoid dumping the heap or executing the data collection | |
291 // commands multiple times we just do it once when the first threads reports | |
292 // the error. | |
293 if (Atomic::cmpxchg(1, &out_of_memory_reported, 0) == 0) { | |
294 // create heap dump before OnOutOfMemoryError commands are executed | |
295 if (HeapDumpOnOutOfMemoryError) { | |
296 tty->print_cr("java.lang.OutOfMemoryError: %s", message); | |
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297 HeapDumper::dump_heap_from_oome(); |
0 | 298 } |
299 | |
300 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) { | |
301 VMError err(message); | |
302 err.report_java_out_of_memory(); | |
303 } | |
304 } | |
305 } | |
306 | |
307 static bool error_reported = false; | |
308 | |
309 // call this when the VM is dying--it might loosen some asserts | |
310 void set_error_reported() { | |
311 error_reported = true; | |
312 } | |
313 | |
314 bool is_error_reported() { | |
315 return error_reported; | |
316 } | |
317 | |
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318 #ifndef PRODUCT |
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319 #include <signal.h> |
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320 |
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321 void test_error_handler(size_t test_num) |
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322 { |
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323 if (test_num == 0) return; |
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324 |
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325 // If asserts are disabled, use the corresponding guarantee instead. |
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326 size_t n = test_num; |
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327 NOT_DEBUG(if (n <= 2) n += 2); |
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328 |
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329 const char* const str = "hello"; |
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330 const size_t num = (size_t)os::vm_page_size(); |
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331 |
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332 const char* const eol = os::line_separator(); |
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333 const char* const msg = "this message should be truncated during formatting"; |
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334 |
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335 // Keep this in sync with test/runtime/6888954/vmerrors.sh. |
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336 switch (n) { |
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337 case 1: assert(str == NULL, "expected null"); |
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338 case 2: assert(num == 1023 && *str == 'X', |
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339 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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340 case 3: guarantee(str == NULL, "expected null"); |
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341 case 4: guarantee(num == 1023 && *str == 'X', |
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342 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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343 case 5: fatal("expected null"); |
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344 case 6: fatal(err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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345 case 7: fatal(err_msg("%s%s# %s%s# %s%s# %s%s# %s%s# " |
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346 "%s%s# %s%s# %s%s# %s%s# %s%s# " |
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347 "%s%s# %s%s# %s%s# %s%s# %s", |
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348 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol, |
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349 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol, |
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350 msg, eol, msg, eol, msg, eol, msg, eol, msg)); |
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351 case 8: vm_exit_out_of_memory(num, "ChunkPool::allocate"); |
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352 case 9: ShouldNotCallThis(); |
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353 case 10: ShouldNotReachHere(); |
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354 case 11: Unimplemented(); |
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355 // This is last because it does not generate an hs_err* file on Windows. |
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356 case 12: os::signal_raise(SIGSEGV); |
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357 |
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358 default: ShouldNotReachHere(); |
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359 } |
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360 } |
4006 | 361 #endif // !PRODUCT |
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362 |
0 | 363 // ------ helper functions for debugging go here ------------ |
364 | |
365 // All debug entries should be wrapped with a stack allocated | |
366 // Command object. It makes sure a resource mark is set and | |
367 // flushes the logfile to prevent file sharing problems. | |
368 | |
369 class Command : public StackObj { | |
370 private: | |
371 ResourceMark rm; | |
372 ResetNoHandleMark rnhm; | |
373 HandleMark hm; | |
374 bool debug_save; | |
375 public: | |
376 static int level; | |
377 Command(const char* str) { | |
378 debug_save = Debugging; | |
379 Debugging = true; | |
380 if (level++ > 0) return; | |
381 tty->cr(); | |
382 tty->print_cr("\"Executing %s\"", str); | |
383 } | |
384 | |
4006 | 385 ~Command() { |
386 tty->flush(); | |
387 Debugging = debug_save; | |
388 level--; | |
389 } | |
0 | 390 }; |
391 | |
392 int Command::level = 0; | |
393 | |
4006 | 394 #ifndef PRODUCT |
395 | |
0 | 396 extern "C" void blob(CodeBlob* cb) { |
397 Command c("blob"); | |
398 cb->print(); | |
399 } | |
400 | |
401 | |
402 extern "C" void dump_vtable(address p) { | |
403 Command c("dump_vtable"); | |
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404 Klass* k = (Klass*)p; |
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405 InstanceKlass::cast(k)->vtable()->print(); |
0 | 406 } |
407 | |
408 | |
409 extern "C" void nm(intptr_t p) { | |
410 // Actually we look through all CodeBlobs (the nm name has been kept for backwards compatability) | |
411 Command c("nm"); | |
412 CodeBlob* cb = CodeCache::find_blob((address)p); | |
413 if (cb == NULL) { | |
414 tty->print_cr("NULL"); | |
415 } else { | |
416 cb->print(); | |
417 } | |
418 } | |
419 | |
420 | |
421 extern "C" void disnm(intptr_t p) { | |
422 Command c("disnm"); | |
423 CodeBlob* cb = CodeCache::find_blob((address) p); | |
2008 | 424 nmethod* nm = cb->as_nmethod_or_null(); |
425 if (nm) { | |
426 nm->print(); | |
427 Disassembler::decode(nm); | |
428 } else { | |
429 cb->print(); | |
430 Disassembler::decode(cb); | |
431 } | |
0 | 432 } |
433 | |
434 | |
435 extern "C" void printnm(intptr_t p) { | |
436 char buffer[256]; | |
437 sprintf(buffer, "printnm: " INTPTR_FORMAT, p); | |
438 Command c(buffer); | |
439 CodeBlob* cb = CodeCache::find_blob((address) p); | |
440 if (cb->is_nmethod()) { | |
441 nmethod* nm = (nmethod*)cb; | |
442 nm->print_nmethod(true); | |
443 } | |
444 } | |
445 | |
446 | |
447 extern "C" void universe() { | |
448 Command c("universe"); | |
449 Universe::print(); | |
450 } | |
451 | |
452 | |
453 extern "C" void verify() { | |
454 // try to run a verify on the entire system | |
455 // note: this may not be safe if we're not at a safepoint; for debugging, | |
456 // this manipulates the safepoint settings to avoid assertion failures | |
457 Command c("universe verify"); | |
458 bool safe = SafepointSynchronize::is_at_safepoint(); | |
459 if (!safe) { | |
460 tty->print_cr("warning: not at safepoint -- verify may fail"); | |
461 SafepointSynchronize::set_is_at_safepoint(); | |
462 } | |
463 // Ensure Eden top is correct before verification | |
464 Universe::heap()->prepare_for_verify(); | |
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465 Universe::verify(); |
0 | 466 if (!safe) SafepointSynchronize::set_is_not_at_safepoint(); |
467 } | |
468 | |
469 | |
470 extern "C" void pp(void* p) { | |
471 Command c("pp"); | |
472 FlagSetting fl(PrintVMMessages, true); | |
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473 FlagSetting f2(DisplayVMOutput, true); |
0 | 474 if (Universe::heap()->is_in(p)) { |
475 oop obj = oop(p); | |
476 obj->print(); | |
477 } else { | |
4006 | 478 tty->print(PTR_FORMAT, p); |
0 | 479 } |
480 } | |
481 | |
482 | |
483 // pv: print vm-printable object | |
484 extern "C" void pa(intptr_t p) { ((AllocatedObj*) p)->print(); } | |
485 extern "C" void findpc(intptr_t x); | |
486 | |
4006 | 487 #endif // !PRODUCT |
488 | |
0 | 489 extern "C" void ps() { // print stack |
4006 | 490 if (Thread::current() == NULL) return; |
0 | 491 Command c("ps"); |
492 | |
493 | |
494 // Prints the stack of the current Java thread | |
495 JavaThread* p = JavaThread::active(); | |
496 tty->print(" for thread: "); | |
497 p->print(); | |
498 tty->cr(); | |
499 | |
500 if (p->has_last_Java_frame()) { | |
501 // If the last_Java_fp is set we are in C land and | |
502 // can call the standard stack_trace function. | |
4006 | 503 #ifdef PRODUCT |
504 p->print_stack(); | |
505 } else { | |
506 tty->print_cr("Cannot find the last Java frame, printing stack disabled."); | |
507 #else // !PRODUCT | |
0 | 508 p->trace_stack(); |
509 } else { | |
510 frame f = os::current_frame(); | |
511 RegisterMap reg_map(p); | |
512 f = f.sender(®_map); | |
513 tty->print("(guessing starting frame id=%#p based on current fp)\n", f.id()); | |
514 p->trace_stack_from(vframe::new_vframe(&f, ®_map, p)); | |
515 pd_ps(f); | |
4006 | 516 #endif // PRODUCT |
0 | 517 } |
518 | |
519 } | |
520 | |
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521 extern "C" void pfl() { |
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522 // print frame layout |
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523 Command c("pfl"); |
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524 JavaThread* p = JavaThread::active(); |
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525 tty->print(" for thread: "); |
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526 p->print(); |
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527 tty->cr(); |
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528 if (p->has_last_Java_frame()) { |
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529 p->print_frame_layout(); |
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530 } |
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531 } |
0 | 532 |
4006 | 533 #ifndef PRODUCT |
534 | |
0 | 535 extern "C" void psf() { // print stack frames |
536 { | |
537 Command c("psf"); | |
538 JavaThread* p = JavaThread::active(); | |
539 tty->print(" for thread: "); | |
540 p->print(); | |
541 tty->cr(); | |
542 if (p->has_last_Java_frame()) { | |
543 p->trace_frames(); | |
544 } | |
545 } | |
546 } | |
547 | |
548 | |
549 extern "C" void threads() { | |
550 Command c("threads"); | |
551 Threads::print(false, true); | |
552 } | |
553 | |
554 | |
555 extern "C" void psd() { | |
556 Command c("psd"); | |
557 SystemDictionary::print(); | |
558 } | |
559 | |
560 | |
561 extern "C" void safepoints() { | |
562 Command c("safepoints"); | |
563 SafepointSynchronize::print_state(); | |
564 } | |
565 | |
4006 | 566 #endif // !PRODUCT |
0 | 567 |
568 extern "C" void pss() { // print all stacks | |
4006 | 569 if (Thread::current() == NULL) return; |
0 | 570 Command c("pss"); |
4006 | 571 Threads::print(true, PRODUCT_ONLY(false) NOT_PRODUCT(true)); |
0 | 572 } |
573 | |
4006 | 574 #ifndef PRODUCT |
0 | 575 |
576 extern "C" void debug() { // to set things up for compiler debugging | |
577 Command c("debug"); | |
578 WizardMode = true; | |
579 PrintVMMessages = PrintCompilation = true; | |
580 PrintInlining = PrintAssembly = true; | |
581 tty->flush(); | |
582 } | |
583 | |
584 | |
585 extern "C" void ndebug() { // undo debug() | |
586 Command c("ndebug"); | |
587 PrintCompilation = false; | |
588 PrintInlining = PrintAssembly = false; | |
589 tty->flush(); | |
590 } | |
591 | |
592 | |
593 extern "C" void flush() { | |
594 Command c("flush"); | |
595 tty->flush(); | |
596 } | |
597 | |
4944 | 598 extern "C" void events() { |
599 Command c("events"); | |
600 Events::print(); | |
601 } | |
0 | 602 |
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603 extern "C" Method* findm(intptr_t pc) { |
0 | 604 Command c("findm"); |
605 nmethod* nm = CodeCache::find_nmethod((address)pc); | |
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606 return (nm == NULL) ? (Method*)NULL : nm->method(); |
0 | 607 } |
608 | |
609 | |
610 extern "C" nmethod* findnm(intptr_t addr) { | |
611 Command c("findnm"); | |
612 return CodeCache::find_nmethod((address)addr); | |
613 } | |
614 | |
615 static address same_page(address x, address y) { | |
616 intptr_t page_bits = -os::vm_page_size(); | |
617 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) { | |
618 return x; | |
619 } else if (x > y) { | |
620 return (address)(intptr_t(y) | ~page_bits) + 1; | |
621 } else { | |
622 return (address)(intptr_t(y) & page_bits); | |
623 } | |
624 } | |
625 | |
626 | |
627 // Another interface that isn't ambiguous in dbx. | |
628 // Can we someday rename the other find to hsfind? | |
629 extern "C" void hsfind(intptr_t x) { | |
630 Command c("hsfind"); | |
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631 os::print_location(tty, x, false); |
0 | 632 } |
633 | |
634 | |
635 extern "C" void find(intptr_t x) { | |
636 Command c("find"); | |
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637 os::print_location(tty, x, false); |
0 | 638 } |
639 | |
640 | |
641 extern "C" void findpc(intptr_t x) { | |
642 Command c("findpc"); | |
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643 os::print_location(tty, x, true); |
0 | 644 } |
645 | |
646 | |
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647 // Need method pointer to find bcp, when not in permgen. |
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648 extern "C" void findbcp(intptr_t method, intptr_t bcp) { |
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649 Command c("findbcp"); |
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650 Method* mh = (Method*)method; |
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651 if (!mh->is_native()) { |
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652 tty->print_cr("bci_from(%p) = %d; print_codes():", |
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653 mh, mh->bci_from(address(bcp))); |
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654 mh->print_codes_on(tty); |
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655 } |
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656 } |
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657 |
0 | 658 // int versions of all methods to avoid having to type type casts in the debugger |
659 | |
660 void pp(intptr_t p) { pp((void*)p); } | |
661 void pp(oop p) { pp((void*)p); } | |
662 | |
663 void help() { | |
664 Command c("help"); | |
665 tty->print_cr("basic"); | |
666 tty->print_cr(" pp(void* p) - try to make sense of p"); | |
667 tty->print_cr(" pv(intptr_t p)- ((PrintableResourceObj*) p)->print()"); | |
668 tty->print_cr(" ps() - print current thread stack"); | |
669 tty->print_cr(" pss() - print all thread stacks"); | |
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670 tty->print_cr(" pm(int pc) - print Method* given compiled PC"); |
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671 tty->print_cr(" findm(intptr_t pc) - finds Method*"); |
0 | 672 tty->print_cr(" find(intptr_t x) - finds & prints nmethod/stub/bytecode/oop based on pointer into it"); |
673 | |
674 tty->print_cr("misc."); | |
675 tty->print_cr(" flush() - flushes the log file"); | |
4944 | 676 tty->print_cr(" events() - dump events from ring buffers"); |
0 | 677 |
678 | |
679 tty->print_cr("compiler debugging"); | |
680 tty->print_cr(" debug() - to set things up for compiler debugging"); | |
681 tty->print_cr(" ndebug() - undo debug"); | |
682 } | |
683 | |
684 #if 0 | |
685 | |
686 // BobV's command parser for debugging on windows when nothing else works. | |
687 | |
688 enum CommandID { | |
689 CMDID_HELP, | |
690 CMDID_QUIT, | |
691 CMDID_HSFIND, | |
692 CMDID_PSS, | |
693 CMDID_PS, | |
694 CMDID_PSF, | |
695 CMDID_FINDM, | |
696 CMDID_FINDNM, | |
697 CMDID_PP, | |
698 CMDID_BPT, | |
699 CMDID_EXIT, | |
700 CMDID_VERIFY, | |
701 CMDID_THREADS, | |
702 CMDID_ILLEGAL = 99 | |
703 }; | |
704 | |
705 struct CommandParser { | |
706 char *name; | |
707 CommandID code; | |
708 char *description; | |
709 }; | |
710 | |
711 struct CommandParser CommandList[] = { | |
712 (char *)"help", CMDID_HELP, " Dump this list", | |
713 (char *)"quit", CMDID_QUIT, " Return from this routine", | |
714 (char *)"hsfind", CMDID_HSFIND, "Perform an hsfind on an address", | |
715 (char *)"ps", CMDID_PS, " Print Current Thread Stack Trace", | |
716 (char *)"pss", CMDID_PSS, " Print All Thread Stack Trace", | |
717 (char *)"psf", CMDID_PSF, " Print All Stack Frames", | |
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718 (char *)"findm", CMDID_FINDM, " Find a Method* from a PC", |
0 | 719 (char *)"findnm", CMDID_FINDNM, "Find an nmethod from a PC", |
720 (char *)"pp", CMDID_PP, " Find out something about a pointer", | |
721 (char *)"break", CMDID_BPT, " Execute a breakpoint", | |
722 (char *)"exitvm", CMDID_EXIT, "Exit the VM", | |
723 (char *)"verify", CMDID_VERIFY, "Perform a Heap Verify", | |
724 (char *)"thread", CMDID_THREADS, "Dump Info on all Threads", | |
725 (char *)0, CMDID_ILLEGAL | |
726 }; | |
727 | |
728 | |
729 // get_debug_command() | |
730 // | |
731 // Read a command from standard input. | |
732 // This is useful when you have a debugger | |
733 // which doesn't support calling into functions. | |
734 // | |
735 void get_debug_command() | |
736 { | |
737 ssize_t count; | |
738 int i,j; | |
739 bool gotcommand; | |
740 intptr_t addr; | |
741 char buffer[256]; | |
742 nmethod *nm; | |
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743 Method* m; |
0 | 744 |
745 tty->print_cr("You have entered the diagnostic command interpreter"); | |
746 tty->print("The supported commands are:\n"); | |
747 for ( i=0; ; i++ ) { | |
748 if ( CommandList[i].code == CMDID_ILLEGAL ) | |
749 break; | |
750 tty->print_cr(" %s \n", CommandList[i].name ); | |
751 } | |
752 | |
753 while ( 1 ) { | |
754 gotcommand = false; | |
755 tty->print("Please enter a command: "); | |
756 count = scanf("%s", buffer) ; | |
757 if ( count >=0 ) { | |
758 for ( i=0; ; i++ ) { | |
759 if ( CommandList[i].code == CMDID_ILLEGAL ) { | |
760 if (!gotcommand) tty->print("Invalid command, please try again\n"); | |
761 break; | |
762 } | |
763 if ( strcmp(buffer, CommandList[i].name) == 0 ) { | |
764 gotcommand = true; | |
765 switch ( CommandList[i].code ) { | |
766 case CMDID_PS: | |
767 ps(); | |
768 break; | |
769 case CMDID_PSS: | |
770 pss(); | |
771 break; | |
772 case CMDID_PSF: | |
773 psf(); | |
774 break; | |
775 case CMDID_FINDM: | |
776 tty->print("Please enter the hex addr to pass to findm: "); | |
777 scanf("%I64X", &addr); | |
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778 m = (Method*)findm(addr); |
0 | 779 tty->print("findm(0x%I64X) returned 0x%I64X\n", addr, m); |
780 break; | |
781 case CMDID_FINDNM: | |
782 tty->print("Please enter the hex addr to pass to findnm: "); | |
783 scanf("%I64X", &addr); | |
784 nm = (nmethod*)findnm(addr); | |
785 tty->print("findnm(0x%I64X) returned 0x%I64X\n", addr, nm); | |
786 break; | |
787 case CMDID_PP: | |
788 tty->print("Please enter the hex addr to pass to pp: "); | |
789 scanf("%I64X", &addr); | |
790 pp((void*)addr); | |
791 break; | |
792 case CMDID_EXIT: | |
793 exit(0); | |
794 case CMDID_HELP: | |
795 tty->print("Here are the supported commands: "); | |
796 for ( j=0; ; j++ ) { | |
797 if ( CommandList[j].code == CMDID_ILLEGAL ) | |
798 break; | |
799 tty->print_cr(" %s -- %s\n", CommandList[j].name, | |
800 CommandList[j].description ); | |
801 } | |
802 break; | |
803 case CMDID_QUIT: | |
804 return; | |
805 break; | |
806 case CMDID_BPT: | |
807 BREAKPOINT; | |
808 break; | |
809 case CMDID_VERIFY: | |
810 verify();; | |
811 break; | |
812 case CMDID_THREADS: | |
813 threads();; | |
814 break; | |
815 case CMDID_HSFIND: | |
816 tty->print("Please enter the hex addr to pass to hsfind: "); | |
817 scanf("%I64X", &addr); | |
818 tty->print("Calling hsfind(0x%I64X)\n", addr); | |
819 hsfind(addr); | |
820 break; | |
821 default: | |
822 case CMDID_ILLEGAL: | |
823 break; | |
824 } | |
825 } | |
826 } | |
827 } | |
828 } | |
829 } | |
830 #endif | |
831 | |
4006 | 832 #endif // !PRODUCT |