29 #include "jfr/recorder/repository/jfrEmergencyDump.hpp"
30 #include "jfr/recorder/service/jfrPostBox.hpp"
31 #include "jfr/recorder/service/jfrRecorderService.hpp"
32 #include "jfr/utilities/jfrTypes.hpp"
33 #include "logging/log.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/atomic.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "runtime/globals.hpp"
38 #include "runtime/mutexLocker.hpp"
39 #include "runtime/os.hpp"
40 #include "runtime/thread.inline.hpp"
41 #include "utilities/growableArray.hpp"
42
43 static const char vm_error_filename_fmt[] = "hs_err_pid%p.jfr";
44 static const char vm_oom_filename_fmt[] = "hs_oom_pid%p.jfr";
45 static const char vm_soe_filename_fmt[] = "hs_soe_pid%p.jfr";
46 static const char chunk_file_jfr_ext[] = ".jfr";
47 static const size_t iso8601_len = 19; // "YYYY-MM-DDTHH:MM:SS"
48
49 static fio_fd open_exclusivly(const char* path) {
50 return os::open(path, O_CREAT | O_RDWR, S_IREAD | S_IWRITE);
51 }
52
53 static int file_sort(const char** const file1, const char** file2) {
54 assert(NULL != *file1 && NULL != *file2, "invariant");
55 int cmp = strncmp(*file1, *file2, iso8601_len);
56 if (0 == cmp) {
57 const char* const dot1 = strchr(*file1, '.');
58 assert(NULL != dot1, "invariant");
59 const char* const dot2 = strchr(*file2, '.');
60 assert(NULL != dot2, "invariant");
61 ptrdiff_t file1_len = dot1 - *file1;
62 ptrdiff_t file2_len = dot2 - *file2;
63 if (file1_len < file2_len) {
64 return -1;
65 }
66 if (file1_len > file2_len) {
67 return 1;
68 }
230 int64_t bytes_read = 0;
231 int64_t bytes_written = 0;
232 while (bytes_read < current_filesize) {
233 const ssize_t read_result = os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
234 if (-1 == read_result) {
235 log_info(jfr)( // For user, should not be "jfr, system"
236 "Unable to recover JFR data");
237 break;
238 }
239 bytes_read += (int64_t)read_result;
240 assert(bytes_read - bytes_written <= (int64_t)size_of_file_copy_block, "invariant");
241 bytes_written += (int64_t)os::write(emergency_fd, file_copy_block, bytes_read - bytes_written);
242 assert(bytes_read == bytes_written, "invariant");
243 }
244 os::close(current_fd);
245 }
246 }
247 }
248 }
249
250 static const char* create_emergency_dump_path() {
251 char* buffer = NEW_RESOURCE_ARRAY_RETURN_NULL(char, JVM_MAXPATHLEN);
252 if (NULL == buffer) {
253 return NULL;
254 }
255 const char* const cwd = os::get_current_directory(buffer, JVM_MAXPATHLEN);
256 if (NULL == cwd) {
257 return NULL;
258 }
259 size_t pos = strlen(cwd);
260 const int fsep_len = jio_snprintf(&buffer[pos], JVM_MAXPATHLEN - pos, "%s", os::file_separator());
261 const char* filename_fmt = NULL;
262 // fetch specific error cause
263 switch (JfrJavaSupport::cause()) {
264 case JfrJavaSupport::OUT_OF_MEMORY:
265 filename_fmt = vm_oom_filename_fmt;
266 break;
267 case JfrJavaSupport::STACK_OVERFLOW:
268 filename_fmt = vm_soe_filename_fmt;
269 break;
270 default:
271 filename_fmt = vm_error_filename_fmt;
272 }
273 char* emergency_dump_path = NULL;
274 pos += fsep_len;
275 if (Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &buffer[pos], JVM_MAXPATHLEN - pos)) {
276 const size_t emergency_filename_length = strlen(buffer);
277 emergency_dump_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, emergency_filename_length + 1);
278 if (NULL == emergency_dump_path) {
279 return NULL;
280 }
281 strncpy(emergency_dump_path, buffer, emergency_filename_length + 1);
282 }
283 if (emergency_dump_path != NULL) {
284 log_info(jfr)( // For user, should not be "jfr, system"
285 "Attempting to recover JFR data, emergency jfr file: %s", emergency_dump_path);
286 }
287 return emergency_dump_path;
288 }
289
290 // Caller needs ResourceMark
291 static const char* create_emergency_chunk_path(const char* repository_path) {
292 assert(repository_path != NULL, "invariant");
293 const size_t repository_path_len = strlen(repository_path);
294 // date time
295 char date_time_buffer[32] = { 0 };
296 date_time(date_time_buffer, sizeof(date_time_buffer));
297 size_t date_time_len = strlen(date_time_buffer);
298 size_t chunkname_max_len = repository_path_len // repository_base_path
299 + 1 // "/"
300 + date_time_len // date_time
301 + strlen(chunk_file_jfr_ext) // .jfr
302 + 1;
303 char* chunk_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, chunkname_max_len);
304 if (chunk_path == NULL) {
305 return NULL;
306 }
307 // append the individual substrings
308 jio_snprintf(chunk_path, chunkname_max_len, "%s%s%s%s", repository_path, os::file_separator(), date_time_buffer, chunk_file_jfr_ext);
309 return chunk_path;
310 }
311
312 static fio_fd emergency_dump_file_descriptor() {
313 ResourceMark rm;
314 const char* const emergency_dump_path = create_emergency_dump_path();
315 return emergency_dump_path != NULL ? open_exclusivly(emergency_dump_path) : invalid_fd;
316 }
317
318 const char* JfrEmergencyDump::build_dump_path(const char* repository_path) {
319 return repository_path == NULL ? create_emergency_dump_path() : create_emergency_chunk_path(repository_path);
320 }
321
322 void JfrEmergencyDump::on_vm_error(const char* repository_path) {
323 assert(repository_path != NULL, "invariant");
324 ResourceMark rm;
325 const fio_fd emergency_fd = emergency_dump_file_descriptor();
326 if (emergency_fd != invalid_fd) {
327 RepositoryIterator iterator(repository_path, strlen(repository_path));
328 write_emergency_file(emergency_fd, iterator);
329 os::close(emergency_fd);
330 }
331 }
332
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29 #include "jfr/recorder/repository/jfrEmergencyDump.hpp"
30 #include "jfr/recorder/service/jfrPostBox.hpp"
31 #include "jfr/recorder/service/jfrRecorderService.hpp"
32 #include "jfr/utilities/jfrTypes.hpp"
33 #include "logging/log.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/atomic.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "runtime/globals.hpp"
38 #include "runtime/mutexLocker.hpp"
39 #include "runtime/os.hpp"
40 #include "runtime/thread.inline.hpp"
41 #include "utilities/growableArray.hpp"
42
43 static const char vm_error_filename_fmt[] = "hs_err_pid%p.jfr";
44 static const char vm_oom_filename_fmt[] = "hs_oom_pid%p.jfr";
45 static const char vm_soe_filename_fmt[] = "hs_soe_pid%p.jfr";
46 static const char chunk_file_jfr_ext[] = ".jfr";
47 static const size_t iso8601_len = 19; // "YYYY-MM-DDTHH:MM:SS"
48
49 char JfrEmergencyDump::_dump_path[JVM_MAXPATHLEN] = {0};
50
51 static fio_fd open_exclusivly(const char* path) {
52 return os::open(path, O_CREAT | O_RDWR, S_IREAD | S_IWRITE);
53 }
54
55 static int file_sort(const char** const file1, const char** file2) {
56 assert(NULL != *file1 && NULL != *file2, "invariant");
57 int cmp = strncmp(*file1, *file2, iso8601_len);
58 if (0 == cmp) {
59 const char* const dot1 = strchr(*file1, '.');
60 assert(NULL != dot1, "invariant");
61 const char* const dot2 = strchr(*file2, '.');
62 assert(NULL != dot2, "invariant");
63 ptrdiff_t file1_len = dot1 - *file1;
64 ptrdiff_t file2_len = dot2 - *file2;
65 if (file1_len < file2_len) {
66 return -1;
67 }
68 if (file1_len > file2_len) {
69 return 1;
70 }
232 int64_t bytes_read = 0;
233 int64_t bytes_written = 0;
234 while (bytes_read < current_filesize) {
235 const ssize_t read_result = os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
236 if (-1 == read_result) {
237 log_info(jfr)( // For user, should not be "jfr, system"
238 "Unable to recover JFR data");
239 break;
240 }
241 bytes_read += (int64_t)read_result;
242 assert(bytes_read - bytes_written <= (int64_t)size_of_file_copy_block, "invariant");
243 bytes_written += (int64_t)os::write(emergency_fd, file_copy_block, bytes_read - bytes_written);
244 assert(bytes_read == bytes_written, "invariant");
245 }
246 os::close(current_fd);
247 }
248 }
249 }
250 }
251
252 const char* JfrEmergencyDump::create_emergency_dump_path() {
253 if (*_dump_path != '\0') {
254 return _dump_path;
255 }
256
257 const char* const cwd = os::get_current_directory(_dump_path, JVM_MAXPATHLEN);
258 if (NULL == cwd) {
259 return NULL;
260 }
261 size_t pos = strlen(cwd);
262 const int fsep_len = jio_snprintf(&_dump_path[pos], JVM_MAXPATHLEN - pos, "%s", os::file_separator());
263 const char* filename_fmt = NULL;
264 // fetch specific error cause
265 switch (JfrJavaSupport::cause()) {
266 case JfrJavaSupport::OUT_OF_MEMORY:
267 filename_fmt = vm_oom_filename_fmt;
268 break;
269 case JfrJavaSupport::STACK_OVERFLOW:
270 filename_fmt = vm_soe_filename_fmt;
271 break;
272 default:
273 filename_fmt = vm_error_filename_fmt;
274 }
275 pos += fsep_len;
276 Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &_dump_path[pos], JVM_MAXPATHLEN - pos);
277 if (*_dump_path != '\0') {
278 log_info(jfr)( // For user, should not be "jfr, system"
279 "Attempting to recover JFR data, emergency jfr file: %s", _dump_path);
280 }
281 return _dump_path;
282 }
283
284 // Caller needs ResourceMark
285 const char* JfrEmergencyDump::create_emergency_chunk_path(const char* repository_path) {
286 assert(repository_path != NULL, "invariant");
287
288 if (*_dump_path != '\0') {
289 return _dump_path;
290 }
291
292 const size_t repository_path_len = strlen(repository_path);
293 // date time
294 char date_time_buffer[32] = { 0 };
295 date_time(date_time_buffer, sizeof(date_time_buffer));
296 size_t date_time_len = strlen(date_time_buffer);
297 size_t chunkname_max_len = repository_path_len // repository_base_path
298 + 1 // "/"
299 + date_time_len // date_time
300 + strlen(chunk_file_jfr_ext) // .jfr
301 + 1;
302 // append the individual substrings
303 jio_snprintf(_dump_path, chunkname_max_len, "%s%s%s%s", repository_path, os::file_separator(), date_time_buffer, chunk_file_jfr_ext);
304 return _dump_path;
305 }
306
307 fio_fd JfrEmergencyDump::emergency_dump_file_descriptor() {
308 ResourceMark rm;
309 const char* const emergency_dump_path = create_emergency_dump_path();
310 return emergency_dump_path != NULL ? open_exclusivly(emergency_dump_path) : invalid_fd;
311 }
312
313 const char* JfrEmergencyDump::build_dump_path(const char* repository_path) {
314 return repository_path == NULL ? create_emergency_dump_path() : create_emergency_chunk_path(repository_path);
315 }
316
317 void JfrEmergencyDump::on_vm_error(const char* repository_path) {
318 assert(repository_path != NULL, "invariant");
319 ResourceMark rm;
320 const fio_fd emergency_fd = emergency_dump_file_descriptor();
321 if (emergency_fd != invalid_fd) {
322 RepositoryIterator iterator(repository_path, strlen(repository_path));
323 write_emergency_file(emergency_fd, iterator);
324 os::close(emergency_fd);
325 }
326 }
327
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