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src/hotspot/share/jfr/recorder/repository/jfrEmergencyDump.cpp

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*** 43,52 **** --- 43,53 ---- static const char vm_error_filename_fmt[] = "hs_err_pid%p.jfr"; static const char vm_oom_filename_fmt[] = "hs_oom_pid%p.jfr"; static const char vm_soe_filename_fmt[] = "hs_soe_pid%p.jfr"; static const char chunk_file_jfr_ext[] = ".jfr"; static const size_t iso8601_len = 19; // "YYYY-MM-DDTHH:MM:SS" + static fio_fd emergency_fd = invalid_fd; static fio_fd open_exclusivly(const char* path) { return os::open(path, O_CREAT | O_RDWR, S_IREAD | S_IWRITE); }
*** 210,220 **** const char* const RepositoryIterator::next() const { return _iterator >= _files->length() ? NULL : fully_qualified(_files->at(_iterator++)); } ! static void write_emergency_file(fio_fd emergency_fd, const RepositoryIterator& iterator) { assert(emergency_fd != invalid_fd, "invariant"); const size_t size_of_file_copy_block = 1 * M; // 1 mb jbyte* const file_copy_block = NEW_RESOURCE_ARRAY_RETURN_NULL(jbyte, size_of_file_copy_block); if (file_copy_block == NULL) { return; --- 211,221 ---- const char* const RepositoryIterator::next() const { return _iterator >= _files->length() ? NULL : fully_qualified(_files->at(_iterator++)); } ! static void write_emergency_file(const RepositoryIterator& iterator) { assert(emergency_fd != invalid_fd, "invariant"); const size_t size_of_file_copy_block = 1 * M; // 1 mb jbyte* const file_copy_block = NEW_RESOURCE_ARRAY_RETURN_NULL(jbyte, size_of_file_copy_block); if (file_copy_block == NULL) { return;
*** 245,262 **** } } } } ! static const char* create_emergency_dump_path() { ! char* buffer = NEW_RESOURCE_ARRAY_RETURN_NULL(char, JVM_MAXPATHLEN); ! if (NULL == buffer) { ! return NULL; ! } const char* const cwd = os::get_current_directory(buffer, JVM_MAXPATHLEN); if (NULL == cwd) { ! return NULL; } size_t pos = strlen(cwd); const int fsep_len = jio_snprintf(&buffer[pos], JVM_MAXPATHLEN - pos, "%s", os::file_separator()); const char* filename_fmt = NULL; // fetch specific error cause --- 246,262 ---- } } } } ! // "emergency_dump_path" have to be allocated JVM_MAXPATHLEN or larger. ! static void create_emergency_dump_path(char* emergency_dump_path) { ! char buffer[JVM_MAXPATHLEN]; ! emergency_dump_path[0] = '\0'; const char* const cwd = os::get_current_directory(buffer, JVM_MAXPATHLEN); if (NULL == cwd) { ! return; } size_t pos = strlen(cwd); const int fsep_len = jio_snprintf(&buffer[pos], JVM_MAXPATHLEN - pos, "%s", os::file_separator()); const char* filename_fmt = NULL; // fetch specific error cause
*** 268,292 **** filename_fmt = vm_soe_filename_fmt; break; default: filename_fmt = vm_error_filename_fmt; } - char* emergency_dump_path = NULL; pos += fsep_len; if (Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &buffer[pos], JVM_MAXPATHLEN - pos)) { ! const size_t emergency_filename_length = strlen(buffer); ! emergency_dump_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, emergency_filename_length + 1); ! if (NULL == emergency_dump_path) { ! return NULL; ! } ! strncpy(emergency_dump_path, buffer, emergency_filename_length + 1); } ! if (emergency_dump_path != NULL) { log_info(jfr)( // For user, should not be "jfr, system" "Attempting to recover JFR data, emergency jfr file: %s", emergency_dump_path); } - return emergency_dump_path; } // Caller needs ResourceMark static const char* create_emergency_chunk_path(const char* repository_path) { assert(repository_path != NULL, "invariant"); --- 268,285 ---- filename_fmt = vm_soe_filename_fmt; break; default: filename_fmt = vm_error_filename_fmt; } pos += fsep_len; if (Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &buffer[pos], JVM_MAXPATHLEN - pos)) { ! strncpy(emergency_dump_path, buffer, JVM_MAXPATHLEN); } ! if (emergency_dump_path[0] != '\0') { log_info(jfr)( // For user, should not be "jfr, system" "Attempting to recover JFR data, emergency jfr file: %s", emergency_dump_path); } } // Caller needs ResourceMark static const char* create_emergency_chunk_path(const char* repository_path) { assert(repository_path != NULL, "invariant");
*** 307,334 **** // append the individual substrings jio_snprintf(chunk_path, chunkname_max_len, "%s%s%s%s", repository_path, os::file_separator(), date_time_buffer, chunk_file_jfr_ext); return chunk_path; } ! static fio_fd emergency_dump_file_descriptor() { ! ResourceMark rm; ! const char* const emergency_dump_path = create_emergency_dump_path(); ! return emergency_dump_path != NULL ? open_exclusivly(emergency_dump_path) : invalid_fd; } const char* JfrEmergencyDump::build_dump_path(const char* repository_path) { ! return repository_path == NULL ? create_emergency_dump_path() : create_emergency_chunk_path(repository_path); } void JfrEmergencyDump::on_vm_error(const char* repository_path) { assert(repository_path != NULL, "invariant"); ResourceMark rm; - const fio_fd emergency_fd = emergency_dump_file_descriptor(); if (emergency_fd != invalid_fd) { RepositoryIterator iterator(repository_path, strlen(repository_path)); ! write_emergency_file(emergency_fd, iterator); os::close(emergency_fd); } } /* * We are just about to exit the VM, so we will be very aggressive --- 300,338 ---- // append the individual substrings jio_snprintf(chunk_path, chunkname_max_len, "%s%s%s%s", repository_path, os::file_separator(), date_time_buffer, chunk_file_jfr_ext); return chunk_path; } ! void JfrEmergencyDump::setup_emergency_dump_file_descriptor() { ! assert(emergency_fd == invalid_fd, "invariant"); ! char emergency_dump_path[JVM_MAXPATHLEN]; ! create_emergency_dump_path(emergency_dump_path); ! emergency_fd = (emergency_dump_path[0] != '\0') ? open_exclusivly(emergency_dump_path) : invalid_fd; } + // Caller needs ResourceMark const char* JfrEmergencyDump::build_dump_path(const char* repository_path) { ! if (repository_path == NULL) { ! char* dump_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, JVM_MAXPATHLEN); ! if (dump_path == NULL) { ! return NULL; ! } ! create_emergency_dump_path(dump_path); ! return dump_path; ! } else { ! return create_emergency_chunk_path(repository_path); ! } } void JfrEmergencyDump::on_vm_error(const char* repository_path) { assert(repository_path != NULL, "invariant"); ResourceMark rm; if (emergency_fd != invalid_fd) { RepositoryIterator iterator(repository_path, strlen(repository_path)); ! write_emergency_file(iterator); os::close(emergency_fd); + emergency_fd = invalid_fd; } } /* * We are just about to exit the VM, so we will be very aggressive
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