Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/debug.cpp @ 6268:6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
Summary: Added new FormatBufferResource class to use thread's resource area for error message buffer.
Reviewed-by: twisti
| author | kvn |
|---|---|
| date | Mon, 30 Jul 2012 09:49:25 -0700 |
| parents | 09d00c18e323 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" | |
| 47 #include "runtime/vframe.hpp" | |
| 48 #include "services/heapDumper.hpp" | |
| 49 #include "utilities/defaultStream.hpp" | |
| 50 #include "utilities/events.hpp" | |
| 51 #include "utilities/top.hpp" | |
| 52 #include "utilities/vmError.hpp" | |
| 53 #ifdef TARGET_OS_FAMILY_linux | |
| 54 # include "os_linux.inline.hpp" | |
| 55 # include "thread_linux.inline.hpp" | |
| 56 #endif | |
| 57 #ifdef TARGET_OS_FAMILY_solaris | |
| 58 # include "os_solaris.inline.hpp" | |
| 59 # include "thread_solaris.inline.hpp" | |
| 60 #endif | |
| 61 #ifdef TARGET_OS_FAMILY_windows | |
| 62 # include "os_windows.inline.hpp" | |
| 63 # include "thread_windows.inline.hpp" | |
| 64 #endif | |
| 3960 | 65 #ifdef TARGET_OS_FAMILY_bsd |
| 66 # include "os_bsd.inline.hpp" | |
| 67 # include "thread_bsd.inline.hpp" | |
| 68 #endif | |
| 0 | 69 |
| 70 #ifndef ASSERT | |
| 71 # ifdef _DEBUG | |
| 72 // NOTE: don't turn the lines below into a comment -- if you're getting | |
| 73 // a compile error here, change the settings to define ASSERT | |
| 74 ASSERT should be defined when _DEBUG is defined. It is not intended to be used for debugging | |
| 75 functions that do not slow down the system too much and thus can be left in optimized code. | |
| 76 On the other hand, the code should not be included in a production version. | |
| 77 # endif // _DEBUG | |
| 78 #endif // ASSERT | |
| 79 | |
| 80 | |
| 81 #ifdef _DEBUG | |
| 82 # ifndef ASSERT | |
| 83 configuration error: ASSERT must be defined in debug version | |
| 84 # endif // ASSERT | |
| 85 #endif // _DEBUG | |
| 86 | |
| 87 | |
| 88 #ifdef PRODUCT | |
| 89 # if -defined _DEBUG || -defined ASSERT | |
| 90 configuration error: ASSERT et al. must not be defined in PRODUCT version | |
| 91 # endif | |
| 92 #endif // PRODUCT | |
| 93 | |
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94 FormatBufferResource::FormatBufferResource(const char * format, ...) |
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95 : FormatBufferBase((char*)resource_allocate_bytes(RES_BUFSZ)) { |
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96 va_list argp; |
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97 va_start(argp, format); |
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98 jio_vsnprintf(_buf, RES_BUFSZ, format, argp); |
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99 va_end(argp); |
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100 } |
| 0 | 101 |
| 102 void warning(const char* format, ...) { | |
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103 if (PrintWarnings) { |
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104 // In case error happens before init or during shutdown |
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105 if (tty == NULL) ostream_init(); |
| 0 | 106 |
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107 tty->print("%s warning: ", VM_Version::vm_name()); |
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108 va_list ap; |
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109 va_start(ap, format); |
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110 tty->vprint_cr(format, ap); |
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111 va_end(ap); |
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112 } |
| 0 | 113 if (BreakAtWarning) BREAKPOINT; |
| 114 } | |
| 115 | |
| 116 #ifndef PRODUCT | |
| 117 | |
| 118 #define is_token_break(ch) (isspace(ch) || (ch) == ',') | |
| 119 | |
| 120 static const char* last_file_name = NULL; | |
| 121 static int last_line_no = -1; | |
| 122 | |
| 123 // assert/guarantee/... may happen very early during VM initialization. | |
| 124 // Don't rely on anything that is initialized by Threads::create_vm(). For | |
| 125 // example, don't use tty. | |
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126 bool error_is_suppressed(const char* file_name, int line_no) { |
| 0 | 127 // The following 1-element cache requires that passed-in |
| 128 // file names are always only constant literals. | |
| 129 if (file_name == last_file_name && line_no == last_line_no) return true; | |
| 130 | |
| 131 int file_name_len = (int)strlen(file_name); | |
| 132 char separator = os::file_separator()[0]; | |
| 133 const char* base_name = strrchr(file_name, separator); | |
| 134 if (base_name == NULL) | |
| 135 base_name = file_name; | |
| 136 | |
| 137 // scan the SuppressErrorAt option | |
| 138 const char* cp = SuppressErrorAt; | |
| 139 for (;;) { | |
| 140 const char* sfile; | |
| 141 int sfile_len; | |
| 142 int sline; | |
| 143 bool noisy; | |
| 144 while ((*cp) != '\0' && is_token_break(*cp)) cp++; | |
| 145 if ((*cp) == '\0') break; | |
| 146 sfile = cp; | |
| 147 while ((*cp) != '\0' && !is_token_break(*cp) && (*cp) != ':') cp++; | |
| 148 sfile_len = cp - sfile; | |
| 149 if ((*cp) == ':') cp++; | |
| 150 sline = 0; | |
| 151 while ((*cp) != '\0' && isdigit(*cp)) { | |
| 152 sline *= 10; | |
| 153 sline += (*cp) - '0'; | |
| 154 cp++; | |
| 155 } | |
| 156 // "file:line!" means the assert suppression is not silent | |
| 157 noisy = ((*cp) == '!'); | |
| 158 while ((*cp) != '\0' && !is_token_break(*cp)) cp++; | |
| 159 // match the line | |
| 160 if (sline != 0) { | |
| 161 if (sline != line_no) continue; | |
| 162 } | |
| 163 // match the file | |
| 164 if (sfile_len > 0) { | |
| 165 const char* look = file_name; | |
| 166 const char* look_max = file_name + file_name_len - sfile_len; | |
| 167 const char* foundp; | |
| 168 bool match = false; | |
| 169 while (!match | |
| 170 && (foundp = strchr(look, sfile[0])) != NULL | |
| 171 && foundp <= look_max) { | |
| 172 match = true; | |
| 173 for (int i = 1; i < sfile_len; i++) { | |
| 174 if (sfile[i] != foundp[i]) { | |
| 175 match = false; | |
| 176 break; | |
| 177 } | |
| 178 } | |
| 179 look = foundp + 1; | |
| 180 } | |
| 181 if (!match) continue; | |
| 182 } | |
| 183 // got a match! | |
| 184 if (noisy) { | |
| 185 fdStream out(defaultStream::output_fd()); | |
| 186 out.print_raw("[error suppressed at "); | |
| 187 out.print_raw(base_name); | |
| 188 char buf[16]; | |
| 189 jio_snprintf(buf, sizeof(buf), ":%d]", line_no); | |
| 190 out.print_raw_cr(buf); | |
| 191 } else { | |
| 192 // update 1-element cache for fast silent matches | |
| 193 last_file_name = file_name; | |
| 194 last_line_no = line_no; | |
| 195 } | |
| 196 return true; | |
| 197 } | |
| 198 | |
| 199 if (!is_error_reported()) { | |
| 200 // print a friendly hint: | |
| 201 fdStream out(defaultStream::output_fd()); | |
| 202 out.print_raw_cr("# To suppress the following error report, specify this argument"); | |
| 203 out.print_raw ("# after -XX: or in .hotspotrc: SuppressErrorAt="); | |
| 204 out.print_raw (base_name); | |
| 205 char buf[16]; | |
| 206 jio_snprintf(buf, sizeof(buf), ":%d", line_no); | |
| 207 out.print_raw_cr(buf); | |
| 208 } | |
| 209 return false; | |
| 210 } | |
| 211 | |
| 212 #undef is_token_break | |
| 213 | |
| 214 #else | |
| 215 | |
| 216 // Place-holder for non-existent suppression check: | |
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217 #define error_is_suppressed(file_name, line_no) (false) |
| 0 | 218 |
| 4006 | 219 #endif // !PRODUCT |
| 0 | 220 |
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221 void report_vm_error(const char* file, int line, const char* error_msg, |
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222 const char* detail_msg) |
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223 { |
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224 if (Debugging || error_is_suppressed(file, line)) return; |
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225 Thread* const thread = ThreadLocalStorage::get_thread_slow(); |
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226 VMError err(thread, file, line, error_msg, detail_msg); |
| 0 | 227 err.report_and_die(); |
| 228 } | |
| 229 | |
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230 void report_fatal(const char* file, int line, const char* message) |
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231 { |
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232 report_vm_error(file, line, "fatal error", message); |
| 0 | 233 } |
| 234 | |
| 235 // Used by report_vm_out_of_memory to detect recursion. | |
| 236 static jint _exiting_out_of_mem = 0; | |
| 237 | |
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238 void report_vm_out_of_memory(const char* file, int line, size_t size, |
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239 const char* message) { |
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240 if (Debugging) return; |
| 0 | 241 |
| 242 // We try to gather additional information for the first out of memory | |
| 243 // error only; gathering additional data might cause an allocation and a | |
| 244 // recursive out_of_memory condition. | |
| 245 | |
| 246 const jint exiting = 1; | |
| 247 // If we succeed in changing the value, we're the first one in. | |
| 248 bool first_time_here = Atomic::xchg(exiting, &_exiting_out_of_mem) != exiting; | |
| 249 | |
| 250 if (first_time_here) { | |
| 251 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
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252 VMError(thread, file, line, size, message).report_and_die(); |
| 0 | 253 } |
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254 |
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255 // Dump core and abort |
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256 vm_abort(true); |
| 0 | 257 } |
| 258 | |
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259 void report_should_not_call(const char* file, int line) { |
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260 report_vm_error(file, line, "ShouldNotCall()"); |
| 0 | 261 } |
| 262 | |
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263 void report_should_not_reach_here(const char* file, int line) { |
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264 report_vm_error(file, line, "ShouldNotReachHere()"); |
| 0 | 265 } |
| 266 | |
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267 void report_unimplemented(const char* file, int line) { |
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268 report_vm_error(file, line, "Unimplemented()"); |
| 0 | 269 } |
| 270 | |
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271 void report_untested(const char* file, int line, const char* message) { |
| 0 | 272 #ifndef PRODUCT |
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273 warning("Untested: %s in %s: %d\n", message, file, line); |
| 4006 | 274 #endif // !PRODUCT |
| 0 | 275 } |
| 276 | |
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277 void report_out_of_shared_space(SharedSpaceType shared_space) { |
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278 static const char* name[] = { |
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279 "permanent generation", |
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280 "shared read only space", |
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281 "shared read write space", |
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282 "shared miscellaneous data space" |
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283 }; |
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284 static const char* flag[] = { |
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285 "PermGen", |
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286 "SharedReadOnlySize", |
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287 "SharedReadWriteSize", |
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288 "SharedMiscDataSize" |
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289 }; |
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290 |
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291 warning("\nThe %s is not large enough\n" |
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292 "to preload requested classes. Use -XX:%s=\n" |
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293 "to increase the initial size of %s.\n", |
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294 name[shared_space], flag[shared_space], name[shared_space]); |
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295 exit(2); |
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296 } |
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297 |
| 0 | 298 void report_java_out_of_memory(const char* message) { |
| 299 static jint out_of_memory_reported = 0; | |
| 300 | |
| 301 // A number of threads may attempt to report OutOfMemoryError at around the | |
| 302 // same time. To avoid dumping the heap or executing the data collection | |
| 303 // commands multiple times we just do it once when the first threads reports | |
| 304 // the error. | |
| 305 if (Atomic::cmpxchg(1, &out_of_memory_reported, 0) == 0) { | |
| 306 // create heap dump before OnOutOfMemoryError commands are executed | |
| 307 if (HeapDumpOnOutOfMemoryError) { | |
| 308 tty->print_cr("java.lang.OutOfMemoryError: %s", message); | |
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309 HeapDumper::dump_heap_from_oome(); |
| 0 | 310 } |
| 311 | |
| 312 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) { | |
| 313 VMError err(message); | |
| 314 err.report_java_out_of_memory(); | |
| 315 } | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 static bool error_reported = false; | |
| 320 | |
| 321 // call this when the VM is dying--it might loosen some asserts | |
| 322 void set_error_reported() { | |
| 323 error_reported = true; | |
| 324 } | |
| 325 | |
| 326 bool is_error_reported() { | |
| 327 return error_reported; | |
| 328 } | |
| 329 | |
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330 #ifndef PRODUCT |
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331 #include <signal.h> |
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332 |
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333 void test_error_handler(size_t test_num) |
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334 { |
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335 if (test_num == 0) return; |
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336 |
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337 // If asserts are disabled, use the corresponding guarantee instead. |
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338 size_t n = test_num; |
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339 NOT_DEBUG(if (n <= 2) n += 2); |
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340 |
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341 const char* const str = "hello"; |
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342 const size_t num = (size_t)os::vm_page_size(); |
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343 |
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344 const char* const eol = os::line_separator(); |
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345 const char* const msg = "this message should be truncated during formatting"; |
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346 |
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347 // Keep this in sync with test/runtime/6888954/vmerrors.sh. |
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348 switch (n) { |
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349 case 1: assert(str == NULL, "expected null"); |
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350 case 2: assert(num == 1023 && *str == 'X', |
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351 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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352 case 3: guarantee(str == NULL, "expected null"); |
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353 case 4: guarantee(num == 1023 && *str == 'X', |
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354 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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355 case 5: fatal("expected null"); |
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356 case 6: fatal(err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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357 case 7: fatal(err_msg("%s%s# %s%s# %s%s# %s%s# %s%s# " |
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358 "%s%s# %s%s# %s%s# %s%s# %s%s# " |
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359 "%s%s# %s%s# %s%s# %s%s# %s", |
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360 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol, |
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361 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol, |
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362 msg, eol, msg, eol, msg, eol, msg, eol, msg)); |
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363 case 8: vm_exit_out_of_memory(num, "ChunkPool::allocate"); |
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364 case 9: ShouldNotCallThis(); |
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365 case 10: ShouldNotReachHere(); |
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366 case 11: Unimplemented(); |
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367 // This is last because it does not generate an hs_err* file on Windows. |
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368 case 12: os::signal_raise(SIGSEGV); |
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369 |
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370 default: ShouldNotReachHere(); |
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371 } |
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372 } |
| 4006 | 373 #endif // !PRODUCT |
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374 |
| 0 | 375 // ------ helper functions for debugging go here ------------ |
| 376 | |
| 377 // All debug entries should be wrapped with a stack allocated | |
| 378 // Command object. It makes sure a resource mark is set and | |
| 379 // flushes the logfile to prevent file sharing problems. | |
| 380 | |
| 381 class Command : public StackObj { | |
| 382 private: | |
| 383 ResourceMark rm; | |
| 384 ResetNoHandleMark rnhm; | |
| 385 HandleMark hm; | |
| 386 bool debug_save; | |
| 387 public: | |
| 388 static int level; | |
| 389 Command(const char* str) { | |
| 390 debug_save = Debugging; | |
| 391 Debugging = true; | |
| 392 if (level++ > 0) return; | |
| 393 tty->cr(); | |
| 394 tty->print_cr("\"Executing %s\"", str); | |
| 395 } | |
| 396 | |
| 4006 | 397 ~Command() { |
| 398 tty->flush(); | |
| 399 Debugging = debug_save; | |
| 400 level--; | |
| 401 } | |
| 0 | 402 }; |
| 403 | |
| 404 int Command::level = 0; | |
| 405 | |
| 4006 | 406 #ifndef PRODUCT |
| 407 | |
| 0 | 408 extern "C" void blob(CodeBlob* cb) { |
| 409 Command c("blob"); | |
| 410 cb->print(); | |
| 411 } | |
| 412 | |
| 413 | |
| 414 extern "C" void dump_vtable(address p) { | |
| 415 Command c("dump_vtable"); | |
| 416 klassOop k = (klassOop)p; | |
| 417 instanceKlass::cast(k)->vtable()->print(); | |
| 418 } | |
| 419 | |
| 420 | |
| 421 extern "C" void nm(intptr_t p) { | |
| 422 // Actually we look through all CodeBlobs (the nm name has been kept for backwards compatability) | |
| 423 Command c("nm"); | |
| 424 CodeBlob* cb = CodeCache::find_blob((address)p); | |
| 425 if (cb == NULL) { | |
| 426 tty->print_cr("NULL"); | |
| 427 } else { | |
| 428 cb->print(); | |
| 429 } | |
| 430 } | |
| 431 | |
| 432 | |
| 433 extern "C" void disnm(intptr_t p) { | |
| 434 Command c("disnm"); | |
| 435 CodeBlob* cb = CodeCache::find_blob((address) p); | |
| 2008 | 436 nmethod* nm = cb->as_nmethod_or_null(); |
| 437 if (nm) { | |
| 438 nm->print(); | |
| 439 Disassembler::decode(nm); | |
| 440 } else { | |
| 441 cb->print(); | |
| 442 Disassembler::decode(cb); | |
| 443 } | |
| 0 | 444 } |
| 445 | |
| 446 | |
| 447 extern "C" void printnm(intptr_t p) { | |
| 448 char buffer[256]; | |
| 449 sprintf(buffer, "printnm: " INTPTR_FORMAT, p); | |
| 450 Command c(buffer); | |
| 451 CodeBlob* cb = CodeCache::find_blob((address) p); | |
| 452 if (cb->is_nmethod()) { | |
| 453 nmethod* nm = (nmethod*)cb; | |
| 454 nm->print_nmethod(true); | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 | |
| 459 extern "C" void universe() { | |
| 460 Command c("universe"); | |
| 461 Universe::print(); | |
| 462 } | |
| 463 | |
| 464 | |
| 465 extern "C" void verify() { | |
| 466 // try to run a verify on the entire system | |
| 467 // note: this may not be safe if we're not at a safepoint; for debugging, | |
| 468 // this manipulates the safepoint settings to avoid assertion failures | |
| 469 Command c("universe verify"); | |
| 470 bool safe = SafepointSynchronize::is_at_safepoint(); | |
| 471 if (!safe) { | |
| 472 tty->print_cr("warning: not at safepoint -- verify may fail"); | |
| 473 SafepointSynchronize::set_is_at_safepoint(); | |
| 474 } | |
| 475 // Ensure Eden top is correct before verification | |
| 476 Universe::heap()->prepare_for_verify(); | |
| 477 Universe::verify(true); | |
| 478 if (!safe) SafepointSynchronize::set_is_not_at_safepoint(); | |
| 479 } | |
| 480 | |
| 481 | |
| 482 extern "C" void pp(void* p) { | |
| 483 Command c("pp"); | |
| 484 FlagSetting fl(PrintVMMessages, true); | |
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485 FlagSetting f2(DisplayVMOutput, true); |
| 0 | 486 if (Universe::heap()->is_in(p)) { |
| 487 oop obj = oop(p); | |
| 488 obj->print(); | |
| 489 } else { | |
| 4006 | 490 tty->print(PTR_FORMAT, p); |
| 0 | 491 } |
| 492 } | |
| 493 | |
| 494 | |
| 495 // pv: print vm-printable object | |
| 496 extern "C" void pa(intptr_t p) { ((AllocatedObj*) p)->print(); } | |
| 497 extern "C" void findpc(intptr_t x); | |
| 498 | |
| 4006 | 499 #endif // !PRODUCT |
| 500 | |
| 0 | 501 extern "C" void ps() { // print stack |
| 4006 | 502 if (Thread::current() == NULL) return; |
| 0 | 503 Command c("ps"); |
| 504 | |
| 505 | |
| 506 // Prints the stack of the current Java thread | |
| 507 JavaThread* p = JavaThread::active(); | |
| 508 tty->print(" for thread: "); | |
| 509 p->print(); | |
| 510 tty->cr(); | |
| 511 | |
| 512 if (p->has_last_Java_frame()) { | |
| 513 // If the last_Java_fp is set we are in C land and | |
| 514 // can call the standard stack_trace function. | |
| 4006 | 515 #ifdef PRODUCT |
| 516 p->print_stack(); | |
| 517 } else { | |
| 518 tty->print_cr("Cannot find the last Java frame, printing stack disabled."); | |
| 519 #else // !PRODUCT | |
| 0 | 520 p->trace_stack(); |
| 521 } else { | |
| 522 frame f = os::current_frame(); | |
| 523 RegisterMap reg_map(p); | |
| 524 f = f.sender(®_map); | |
| 525 tty->print("(guessing starting frame id=%#p based on current fp)\n", f.id()); | |
| 526 p->trace_stack_from(vframe::new_vframe(&f, ®_map, p)); | |
| 527 pd_ps(f); | |
| 4006 | 528 #endif // PRODUCT |
| 0 | 529 } |
| 530 | |
| 531 } | |
| 532 | |
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533 extern "C" void pfl() { |
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534 // print frame layout |
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535 Command c("pfl"); |
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536 JavaThread* p = JavaThread::active(); |
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537 tty->print(" for thread: "); |
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538 p->print(); |
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539 tty->cr(); |
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540 if (p->has_last_Java_frame()) { |
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541 p->print_frame_layout(); |
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542 } |
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543 } |
| 0 | 544 |
| 4006 | 545 #ifndef PRODUCT |
| 546 | |
| 0 | 547 extern "C" void psf() { // print stack frames |
| 548 { | |
| 549 Command c("psf"); | |
| 550 JavaThread* p = JavaThread::active(); | |
| 551 tty->print(" for thread: "); | |
| 552 p->print(); | |
| 553 tty->cr(); | |
| 554 if (p->has_last_Java_frame()) { | |
| 555 p->trace_frames(); | |
| 556 } | |
| 557 } | |
| 558 } | |
| 559 | |
| 560 | |
| 561 extern "C" void threads() { | |
| 562 Command c("threads"); | |
| 563 Threads::print(false, true); | |
| 564 } | |
| 565 | |
| 566 | |
| 567 extern "C" void psd() { | |
| 568 Command c("psd"); | |
| 569 SystemDictionary::print(); | |
| 570 } | |
| 571 | |
| 572 | |
| 573 extern "C" void safepoints() { | |
| 574 Command c("safepoints"); | |
| 575 SafepointSynchronize::print_state(); | |
| 576 } | |
| 577 | |
| 4006 | 578 #endif // !PRODUCT |
| 0 | 579 |
| 580 extern "C" void pss() { // print all stacks | |
| 4006 | 581 if (Thread::current() == NULL) return; |
| 0 | 582 Command c("pss"); |
| 4006 | 583 Threads::print(true, PRODUCT_ONLY(false) NOT_PRODUCT(true)); |
| 0 | 584 } |
| 585 | |
| 4006 | 586 #ifndef PRODUCT |
| 0 | 587 |
| 588 extern "C" void debug() { // to set things up for compiler debugging | |
| 589 Command c("debug"); | |
| 590 WizardMode = true; | |
| 591 PrintVMMessages = PrintCompilation = true; | |
| 592 PrintInlining = PrintAssembly = true; | |
| 593 tty->flush(); | |
| 594 } | |
| 595 | |
| 596 | |
| 597 extern "C" void ndebug() { // undo debug() | |
| 598 Command c("ndebug"); | |
| 599 PrintCompilation = false; | |
| 600 PrintInlining = PrintAssembly = false; | |
| 601 tty->flush(); | |
| 602 } | |
| 603 | |
| 604 | |
| 605 extern "C" void flush() { | |
| 606 Command c("flush"); | |
| 607 tty->flush(); | |
| 608 } | |
| 609 | |
| 4944 | 610 extern "C" void events() { |
| 611 Command c("events"); | |
| 612 Events::print(); | |
| 613 } | |
| 0 | 614 |
| 615 // Given a heap address that was valid before the most recent GC, if | |
| 616 // the oop that used to contain it is still live, prints the new | |
| 617 // location of the oop and the address. Useful for tracking down | |
| 618 // certain kinds of naked oop and oop map bugs. | |
| 619 extern "C" void pnl(intptr_t old_heap_addr) { | |
| 620 // Print New Location of old heap address | |
| 621 Command c("pnl"); | |
| 622 #ifndef VALIDATE_MARK_SWEEP | |
| 623 tty->print_cr("Requires build with VALIDATE_MARK_SWEEP defined (debug build) and RecordMarkSweepCompaction enabled"); | |
| 624 #else | |
| 625 MarkSweep::print_new_location_of_heap_address((HeapWord*) old_heap_addr); | |
| 626 #endif | |
| 627 } | |
| 628 | |
| 629 | |
| 630 extern "C" methodOop findm(intptr_t pc) { | |
| 631 Command c("findm"); | |
| 632 nmethod* nm = CodeCache::find_nmethod((address)pc); | |
| 633 return (nm == NULL) ? (methodOop)NULL : nm->method(); | |
| 634 } | |
| 635 | |
| 636 | |
| 637 extern "C" nmethod* findnm(intptr_t addr) { | |
| 638 Command c("findnm"); | |
| 639 return CodeCache::find_nmethod((address)addr); | |
| 640 } | |
| 641 | |
| 642 static address same_page(address x, address y) { | |
| 643 intptr_t page_bits = -os::vm_page_size(); | |
| 644 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) { | |
| 645 return x; | |
| 646 } else if (x > y) { | |
| 647 return (address)(intptr_t(y) | ~page_bits) + 1; | |
| 648 } else { | |
| 649 return (address)(intptr_t(y) & page_bits); | |
| 650 } | |
| 651 } | |
| 652 | |
| 653 class LookForRefInGenClosure : public OopsInGenClosure { | |
| 654 public: | |
| 655 oop target; | |
| 656 void do_oop(oop* o) { | |
| 657 if (o != NULL && *o == target) { | |
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658 tty->print_cr(INTPTR_FORMAT, o); |
| 0 | 659 } |
| 660 } | |
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661 void do_oop(narrowOop* o) { ShouldNotReachHere(); } |
| 0 | 662 }; |
| 663 | |
| 664 | |
| 665 class LookForRefInObjectClosure : public ObjectClosure { | |
| 666 private: | |
| 667 LookForRefInGenClosure look_in_object; | |
| 668 public: | |
| 669 LookForRefInObjectClosure(oop target) { look_in_object.target = target; } | |
| 670 void do_object(oop obj) { | |
| 671 obj->oop_iterate(&look_in_object); | |
| 672 } | |
| 673 }; | |
| 674 | |
| 675 | |
| 676 static void findref(intptr_t x) { | |
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677 CollectedHeap *ch = Universe::heap(); |
| 0 | 678 LookForRefInGenClosure lookFor; |
| 679 lookFor.target = (oop) x; | |
| 680 LookForRefInObjectClosure look_in_object((oop) x); | |
| 681 | |
| 682 tty->print_cr("Searching heap:"); | |
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683 ch->object_iterate(&look_in_object); |
| 0 | 684 |
| 685 tty->print_cr("Searching strong roots:"); | |
| 686 Universe::oops_do(&lookFor, false); | |
| 687 JNIHandles::oops_do(&lookFor); // Global (strong) JNI handles | |
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688 Threads::oops_do(&lookFor, NULL); |
| 0 | 689 ObjectSynchronizer::oops_do(&lookFor); |
| 690 //FlatProfiler::oops_do(&lookFor); | |
| 691 SystemDictionary::oops_do(&lookFor); | |
| 692 | |
|
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693 tty->print_cr("Searching code cache:"); |
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694 CodeCache::oops_do(&lookFor); |
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695 |
| 0 | 696 tty->print_cr("Done."); |
| 697 } | |
| 698 | |
| 699 class FindClassObjectClosure: public ObjectClosure { | |
| 700 private: | |
| 701 const char* _target; | |
| 702 public: | |
| 703 FindClassObjectClosure(const char name[]) { _target = name; } | |
| 704 | |
| 705 virtual void do_object(oop obj) { | |
| 706 if (obj->is_klass()) { | |
| 707 Klass* k = klassOop(obj)->klass_part(); | |
| 708 if (k->name() != NULL) { | |
| 709 ResourceMark rm; | |
| 710 const char* ext = k->external_name(); | |
| 711 if ( strcmp(_target, ext) == 0 ) { | |
| 712 tty->print_cr("Found " INTPTR_FORMAT, obj); | |
| 713 obj->print(); | |
| 714 } | |
| 715 } | |
| 716 } | |
| 717 } | |
| 718 }; | |
| 719 | |
| 720 // | |
| 721 extern "C" void findclass(const char name[]) { | |
| 722 Command c("findclass"); | |
| 723 if (name != NULL) { | |
| 724 tty->print_cr("Finding class %s -> ", name); | |
| 725 FindClassObjectClosure srch(name); | |
| 726 Universe::heap()->permanent_object_iterate(&srch); | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 // Another interface that isn't ambiguous in dbx. | |
| 731 // Can we someday rename the other find to hsfind? | |
| 732 extern "C" void hsfind(intptr_t x) { | |
| 733 Command c("hsfind"); | |
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734 os::print_location(tty, x, false); |
| 0 | 735 } |
| 736 | |
| 737 | |
| 738 extern "C" void hsfindref(intptr_t x) { | |
| 739 Command c("hsfindref"); | |
| 740 findref(x); | |
| 741 } | |
| 742 | |
| 743 extern "C" void find(intptr_t x) { | |
| 744 Command c("find"); | |
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745 os::print_location(tty, x, false); |
| 0 | 746 } |
| 747 | |
| 748 | |
| 749 extern "C" void findpc(intptr_t x) { | |
| 750 Command c("findpc"); | |
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751 os::print_location(tty, x, true); |
| 0 | 752 } |
| 753 | |
| 754 | |
| 755 // int versions of all methods to avoid having to type type casts in the debugger | |
| 756 | |
| 757 void pp(intptr_t p) { pp((void*)p); } | |
| 758 void pp(oop p) { pp((void*)p); } | |
| 759 | |
| 760 void help() { | |
| 761 Command c("help"); | |
| 762 tty->print_cr("basic"); | |
| 763 tty->print_cr(" pp(void* p) - try to make sense of p"); | |
| 764 tty->print_cr(" pv(intptr_t p)- ((PrintableResourceObj*) p)->print()"); | |
| 765 tty->print_cr(" ps() - print current thread stack"); | |
| 766 tty->print_cr(" pss() - print all thread stacks"); | |
| 767 tty->print_cr(" pm(int pc) - print methodOop given compiled PC"); | |
| 768 tty->print_cr(" findm(intptr_t pc) - finds methodOop"); | |
| 769 tty->print_cr(" find(intptr_t x) - finds & prints nmethod/stub/bytecode/oop based on pointer into it"); | |
| 770 | |
| 771 tty->print_cr("misc."); | |
| 772 tty->print_cr(" flush() - flushes the log file"); | |
| 4944 | 773 tty->print_cr(" events() - dump events from ring buffers"); |
| 0 | 774 |
| 775 | |
| 776 tty->print_cr("compiler debugging"); | |
| 777 tty->print_cr(" debug() - to set things up for compiler debugging"); | |
| 778 tty->print_cr(" ndebug() - undo debug"); | |
| 779 } | |
| 780 | |
| 781 #if 0 | |
| 782 | |
| 783 // BobV's command parser for debugging on windows when nothing else works. | |
| 784 | |
| 785 enum CommandID { | |
| 786 CMDID_HELP, | |
| 787 CMDID_QUIT, | |
| 788 CMDID_HSFIND, | |
| 789 CMDID_PSS, | |
| 790 CMDID_PS, | |
| 791 CMDID_PSF, | |
| 792 CMDID_FINDM, | |
| 793 CMDID_FINDNM, | |
| 794 CMDID_PP, | |
| 795 CMDID_BPT, | |
| 796 CMDID_EXIT, | |
| 797 CMDID_VERIFY, | |
| 798 CMDID_THREADS, | |
| 799 CMDID_ILLEGAL = 99 | |
| 800 }; | |
| 801 | |
| 802 struct CommandParser { | |
| 803 char *name; | |
| 804 CommandID code; | |
| 805 char *description; | |
| 806 }; | |
| 807 | |
| 808 struct CommandParser CommandList[] = { | |
| 809 (char *)"help", CMDID_HELP, " Dump this list", | |
| 810 (char *)"quit", CMDID_QUIT, " Return from this routine", | |
| 811 (char *)"hsfind", CMDID_HSFIND, "Perform an hsfind on an address", | |
| 812 (char *)"ps", CMDID_PS, " Print Current Thread Stack Trace", | |
| 813 (char *)"pss", CMDID_PSS, " Print All Thread Stack Trace", | |
| 814 (char *)"psf", CMDID_PSF, " Print All Stack Frames", | |
| 815 (char *)"findm", CMDID_FINDM, " Find a methodOop from a PC", | |
| 816 (char *)"findnm", CMDID_FINDNM, "Find an nmethod from a PC", | |
| 817 (char *)"pp", CMDID_PP, " Find out something about a pointer", | |
| 818 (char *)"break", CMDID_BPT, " Execute a breakpoint", | |
| 819 (char *)"exitvm", CMDID_EXIT, "Exit the VM", | |
| 820 (char *)"verify", CMDID_VERIFY, "Perform a Heap Verify", | |
| 821 (char *)"thread", CMDID_THREADS, "Dump Info on all Threads", | |
| 822 (char *)0, CMDID_ILLEGAL | |
| 823 }; | |
| 824 | |
| 825 | |
| 826 // get_debug_command() | |
| 827 // | |
| 828 // Read a command from standard input. | |
| 829 // This is useful when you have a debugger | |
| 830 // which doesn't support calling into functions. | |
| 831 // | |
| 832 void get_debug_command() | |
| 833 { | |
| 834 ssize_t count; | |
| 835 int i,j; | |
| 836 bool gotcommand; | |
| 837 intptr_t addr; | |
| 838 char buffer[256]; | |
| 839 nmethod *nm; | |
| 840 methodOop m; | |
| 841 | |
| 842 tty->print_cr("You have entered the diagnostic command interpreter"); | |
| 843 tty->print("The supported commands are:\n"); | |
| 844 for ( i=0; ; i++ ) { | |
| 845 if ( CommandList[i].code == CMDID_ILLEGAL ) | |
| 846 break; | |
| 847 tty->print_cr(" %s \n", CommandList[i].name ); | |
| 848 } | |
| 849 | |
| 850 while ( 1 ) { | |
| 851 gotcommand = false; | |
| 852 tty->print("Please enter a command: "); | |
| 853 count = scanf("%s", buffer) ; | |
| 854 if ( count >=0 ) { | |
| 855 for ( i=0; ; i++ ) { | |
| 856 if ( CommandList[i].code == CMDID_ILLEGAL ) { | |
| 857 if (!gotcommand) tty->print("Invalid command, please try again\n"); | |
| 858 break; | |
| 859 } | |
| 860 if ( strcmp(buffer, CommandList[i].name) == 0 ) { | |
| 861 gotcommand = true; | |
| 862 switch ( CommandList[i].code ) { | |
| 863 case CMDID_PS: | |
| 864 ps(); | |
| 865 break; | |
| 866 case CMDID_PSS: | |
| 867 pss(); | |
| 868 break; | |
| 869 case CMDID_PSF: | |
| 870 psf(); | |
| 871 break; | |
| 872 case CMDID_FINDM: | |
| 873 tty->print("Please enter the hex addr to pass to findm: "); | |
| 874 scanf("%I64X", &addr); | |
| 875 m = (methodOop)findm(addr); | |
| 876 tty->print("findm(0x%I64X) returned 0x%I64X\n", addr, m); | |
| 877 break; | |
| 878 case CMDID_FINDNM: | |
| 879 tty->print("Please enter the hex addr to pass to findnm: "); | |
| 880 scanf("%I64X", &addr); | |
| 881 nm = (nmethod*)findnm(addr); | |
| 882 tty->print("findnm(0x%I64X) returned 0x%I64X\n", addr, nm); | |
| 883 break; | |
| 884 case CMDID_PP: | |
| 885 tty->print("Please enter the hex addr to pass to pp: "); | |
| 886 scanf("%I64X", &addr); | |
| 887 pp((void*)addr); | |
| 888 break; | |
| 889 case CMDID_EXIT: | |
| 890 exit(0); | |
| 891 case CMDID_HELP: | |
| 892 tty->print("Here are the supported commands: "); | |
| 893 for ( j=0; ; j++ ) { | |
| 894 if ( CommandList[j].code == CMDID_ILLEGAL ) | |
| 895 break; | |
| 896 tty->print_cr(" %s -- %s\n", CommandList[j].name, | |
| 897 CommandList[j].description ); | |
| 898 } | |
| 899 break; | |
| 900 case CMDID_QUIT: | |
| 901 return; | |
| 902 break; | |
| 903 case CMDID_BPT: | |
| 904 BREAKPOINT; | |
| 905 break; | |
| 906 case CMDID_VERIFY: | |
| 907 verify();; | |
| 908 break; | |
| 909 case CMDID_THREADS: | |
| 910 threads();; | |
| 911 break; | |
| 912 case CMDID_HSFIND: | |
| 913 tty->print("Please enter the hex addr to pass to hsfind: "); | |
| 914 scanf("%I64X", &addr); | |
| 915 tty->print("Calling hsfind(0x%I64X)\n", addr); | |
| 916 hsfind(addr); | |
| 917 break; | |
| 918 default: | |
| 919 case CMDID_ILLEGAL: | |
| 920 break; | |
| 921 } | |
| 922 } | |
| 923 } | |
| 924 } | |
| 925 } | |
| 926 } | |
| 927 #endif | |
| 928 | |
| 4006 | 929 #endif // !PRODUCT |