duke@435: /* hseigel@4465: * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. duke@435: * duke@435: */ duke@435: stefank@2314: #include "precompiled.hpp" stefank@2314: #include "classfile/symbolTable.hpp" stefank@2314: #include "classfile/systemDictionary.hpp" stefank@2314: #include "classfile/vmSymbols.hpp" stefank@2314: #include "gc_implementation/shared/vmGCOperations.hpp" poonam@3272: #include "memory/gcLocker.inline.hpp" stefank@2314: #include "memory/genCollectedHeap.hpp" stefank@2314: #include "memory/universe.hpp" stefank@2314: #include "oops/objArrayKlass.hpp" stefank@2314: #include "runtime/javaCalls.hpp" stefank@2314: #include "runtime/jniHandles.hpp" stefank@2314: #include "runtime/reflectionUtils.hpp" stefank@2314: #include "runtime/vframe.hpp" stefank@2314: #include "runtime/vmThread.hpp" stefank@2314: #include "runtime/vm_operations.hpp" stefank@2314: #include "services/heapDumper.hpp" stefank@2314: #include "services/threadService.hpp" stefank@2314: #include "utilities/ostream.hpp" jprovino@4542: #include "utilities/macros.hpp" jprovino@4542: #if INCLUDE_ALL_GCS stefank@2314: #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" jprovino@4542: #endif // INCLUDE_ALL_GCS duke@435: duke@435: /* duke@435: * HPROF binary format - description copied from: duke@435: * src/share/demo/jvmti/hprof/hprof_io.c duke@435: * duke@435: * duke@435: * header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" duke@435: * (0-terminated) duke@435: * duke@435: * u4 size of identifiers. Identifiers are used to represent duke@435: * UTF8 strings, objects, stack traces, etc. They usually duke@435: * have the same size as host pointers. For example, on duke@435: * Solaris and Win32, the size is 4. duke@435: * u4 high word duke@435: * u4 low word number of milliseconds since 0:00 GMT, 1/1/70 duke@435: * [record]* a sequence of records. duke@435: * duke@435: * duke@435: * Record format: duke@435: * duke@435: * u1 a TAG denoting the type of the record duke@435: * u4 number of *microseconds* since the time stamp in the duke@435: * header. (wraps around in a little more than an hour) duke@435: * u4 number of bytes *remaining* in the record. Note that duke@435: * this number excludes the tag and the length field itself. duke@435: * [u1]* BODY of the record (a sequence of bytes) duke@435: * duke@435: * duke@435: * The following TAGs are supported: duke@435: * duke@435: * TAG BODY notes duke@435: *---------------------------------------------------------- duke@435: * HPROF_UTF8 a UTF8-encoded name duke@435: * duke@435: * id name ID duke@435: * [u1]* UTF8 characters (no trailing zero) duke@435: * duke@435: * HPROF_LOAD_CLASS a newly loaded class duke@435: * duke@435: * u4 class serial number (> 0) duke@435: * id class object ID duke@435: * u4 stack trace serial number duke@435: * id class name ID duke@435: * duke@435: * HPROF_UNLOAD_CLASS an unloading class duke@435: * duke@435: * u4 class serial_number duke@435: * duke@435: * HPROF_FRAME a Java stack frame duke@435: * duke@435: * id stack frame ID duke@435: * id method name ID duke@435: * id method signature ID duke@435: * id source file name ID duke@435: * u4 class serial number duke@435: * i4 line number. >0: normal duke@435: * -1: unknown duke@435: * -2: compiled method duke@435: * -3: native method duke@435: * duke@435: * HPROF_TRACE a Java stack trace duke@435: * duke@435: * u4 stack trace serial number duke@435: * u4 thread serial number duke@435: * u4 number of frames duke@435: * [id]* stack frame IDs duke@435: * duke@435: * duke@435: * HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC duke@435: * duke@435: * u2 flags 0x0001: incremental vs. complete duke@435: * 0x0002: sorted by allocation vs. live duke@435: * 0x0004: whether to force a GC duke@435: * u4 cutoff ratio duke@435: * u4 total live bytes duke@435: * u4 total live instances duke@435: * u8 total bytes allocated duke@435: * u8 total instances allocated duke@435: * u4 number of sites that follow duke@435: * [u1 is_array: 0: normal object duke@435: * 2: object array duke@435: * 4: boolean array duke@435: * 5: char array duke@435: * 6: float array duke@435: * 7: double array duke@435: * 8: byte array duke@435: * 9: short array duke@435: * 10: int array duke@435: * 11: long array duke@435: * u4 class serial number (may be zero during startup) duke@435: * u4 stack trace serial number duke@435: * u4 number of bytes alive duke@435: * u4 number of instances alive duke@435: * u4 number of bytes allocated duke@435: * u4]* number of instance allocated duke@435: * duke@435: * HPROF_START_THREAD a newly started thread. duke@435: * duke@435: * u4 thread serial number (> 0) duke@435: * id thread object ID duke@435: * u4 stack trace serial number duke@435: * id thread name ID duke@435: * id thread group name ID duke@435: * id thread group parent name ID duke@435: * duke@435: * HPROF_END_THREAD a terminating thread. duke@435: * duke@435: * u4 thread serial number duke@435: * duke@435: * HPROF_HEAP_SUMMARY heap summary duke@435: * duke@435: * u4 total live bytes duke@435: * u4 total live instances duke@435: * u8 total bytes allocated duke@435: * u8 total instances allocated duke@435: * duke@435: * HPROF_HEAP_DUMP denote a heap dump duke@435: * duke@435: * [heap dump sub-records]* duke@435: * duke@435: * There are four kinds of heap dump sub-records: duke@435: * duke@435: * u1 sub-record type duke@435: * duke@435: * HPROF_GC_ROOT_UNKNOWN unknown root duke@435: * duke@435: * id object ID duke@435: * duke@435: * HPROF_GC_ROOT_THREAD_OBJ thread object duke@435: * duke@435: * id thread object ID (may be 0 for a duke@435: * thread newly attached through JNI) duke@435: * u4 thread sequence number duke@435: * u4 stack trace sequence number duke@435: * duke@435: * HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root duke@435: * duke@435: * id object ID duke@435: * id JNI global ref ID duke@435: * duke@435: * HPROF_GC_ROOT_JNI_LOCAL JNI local ref duke@435: * duke@435: * id object ID duke@435: * u4 thread serial number duke@435: * u4 frame # in stack trace (-1 for empty) duke@435: * duke@435: * HPROF_GC_ROOT_JAVA_FRAME Java stack frame duke@435: * duke@435: * id object ID duke@435: * u4 thread serial number duke@435: * u4 frame # in stack trace (-1 for empty) duke@435: * duke@435: * HPROF_GC_ROOT_NATIVE_STACK Native stack duke@435: * duke@435: * id object ID duke@435: * u4 thread serial number duke@435: * duke@435: * HPROF_GC_ROOT_STICKY_CLASS System class duke@435: * duke@435: * id object ID duke@435: * duke@435: * HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block duke@435: * duke@435: * id object ID duke@435: * u4 thread serial number duke@435: * duke@435: * HPROF_GC_ROOT_MONITOR_USED Busy monitor duke@435: * duke@435: * id object ID duke@435: * duke@435: * HPROF_GC_CLASS_DUMP dump of a class object duke@435: * duke@435: * id class object ID duke@435: * u4 stack trace serial number duke@435: * id super class object ID duke@435: * id class loader object ID duke@435: * id signers object ID duke@435: * id protection domain object ID duke@435: * id reserved duke@435: * id reserved duke@435: * duke@435: * u4 instance size (in bytes) duke@435: * duke@435: * u2 size of constant pool duke@435: * [u2, constant pool index, duke@435: * ty, type duke@435: * 2: object duke@435: * 4: boolean duke@435: * 5: char duke@435: * 6: float duke@435: * 7: double duke@435: * 8: byte duke@435: * 9: short duke@435: * 10: int duke@435: * 11: long duke@435: * vl]* and value duke@435: * duke@435: * u2 number of static fields duke@435: * [id, static field name, duke@435: * ty, type, duke@435: * vl]* and value duke@435: * duke@435: * u2 number of inst. fields (not inc. super) duke@435: * [id, instance field name, duke@435: * ty]* type duke@435: * duke@435: * HPROF_GC_INSTANCE_DUMP dump of a normal object duke@435: * duke@435: * id object ID duke@435: * u4 stack trace serial number duke@435: * id class object ID duke@435: * u4 number of bytes that follow duke@435: * [vl]* instance field values (class, followed duke@435: * by super, super's super ...) duke@435: * duke@435: * HPROF_GC_OBJ_ARRAY_DUMP dump of an object array duke@435: * duke@435: * id array object ID duke@435: * u4 stack trace serial number duke@435: * u4 number of elements duke@435: * id array class ID duke@435: * [id]* elements duke@435: * duke@435: * HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array duke@435: * duke@435: * id array object ID duke@435: * u4 stack trace serial number duke@435: * u4 number of elements duke@435: * u1 element type duke@435: * 4: boolean array duke@435: * 5: char array duke@435: * 6: float array duke@435: * 7: double array duke@435: * 8: byte array duke@435: * 9: short array duke@435: * 10: int array duke@435: * 11: long array duke@435: * [u1]* elements duke@435: * duke@435: * HPROF_CPU_SAMPLES a set of sample traces of running threads duke@435: * duke@435: * u4 total number of samples duke@435: * u4 # of traces duke@435: * [u4 # of samples duke@435: * u4]* stack trace serial number duke@435: * duke@435: * HPROF_CONTROL_SETTINGS the settings of on/off switches duke@435: * duke@435: * u4 0x00000001: alloc traces on/off duke@435: * 0x00000002: cpu sampling on/off duke@435: * u2 stack trace depth duke@435: * duke@435: * duke@435: * When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally duke@435: * be generated as a sequence of heap dump segments. This sequence is duke@435: * terminated by an end record. The additional tags allowed by format duke@435: * "JAVA PROFILE 1.0.2" are: duke@435: * duke@435: * HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment duke@435: * duke@435: * [heap dump sub-records]* duke@435: * The same sub-record types allowed by HPROF_HEAP_DUMP duke@435: * duke@435: * HPROF_HEAP_DUMP_END denotes the end of a heap dump duke@435: * duke@435: */ duke@435: duke@435: duke@435: // HPROF tags duke@435: duke@435: typedef enum { duke@435: // top-level records duke@435: HPROF_UTF8 = 0x01, duke@435: HPROF_LOAD_CLASS = 0x02, duke@435: HPROF_UNLOAD_CLASS = 0x03, duke@435: HPROF_FRAME = 0x04, duke@435: HPROF_TRACE = 0x05, duke@435: HPROF_ALLOC_SITES = 0x06, duke@435: HPROF_HEAP_SUMMARY = 0x07, duke@435: HPROF_START_THREAD = 0x0A, duke@435: HPROF_END_THREAD = 0x0B, duke@435: HPROF_HEAP_DUMP = 0x0C, duke@435: HPROF_CPU_SAMPLES = 0x0D, duke@435: HPROF_CONTROL_SETTINGS = 0x0E, duke@435: duke@435: // 1.0.2 record types duke@435: HPROF_HEAP_DUMP_SEGMENT = 0x1C, duke@435: HPROF_HEAP_DUMP_END = 0x2C, duke@435: duke@435: // field types duke@435: HPROF_ARRAY_OBJECT = 0x01, duke@435: HPROF_NORMAL_OBJECT = 0x02, duke@435: HPROF_BOOLEAN = 0x04, duke@435: HPROF_CHAR = 0x05, duke@435: HPROF_FLOAT = 0x06, duke@435: HPROF_DOUBLE = 0x07, duke@435: HPROF_BYTE = 0x08, duke@435: HPROF_SHORT = 0x09, duke@435: HPROF_INT = 0x0A, duke@435: HPROF_LONG = 0x0B, duke@435: duke@435: // data-dump sub-records duke@435: HPROF_GC_ROOT_UNKNOWN = 0xFF, duke@435: HPROF_GC_ROOT_JNI_GLOBAL = 0x01, duke@435: HPROF_GC_ROOT_JNI_LOCAL = 0x02, duke@435: HPROF_GC_ROOT_JAVA_FRAME = 0x03, duke@435: HPROF_GC_ROOT_NATIVE_STACK = 0x04, duke@435: HPROF_GC_ROOT_STICKY_CLASS = 0x05, duke@435: HPROF_GC_ROOT_THREAD_BLOCK = 0x06, duke@435: HPROF_GC_ROOT_MONITOR_USED = 0x07, duke@435: HPROF_GC_ROOT_THREAD_OBJ = 0x08, duke@435: HPROF_GC_CLASS_DUMP = 0x20, duke@435: HPROF_GC_INSTANCE_DUMP = 0x21, duke@435: HPROF_GC_OBJ_ARRAY_DUMP = 0x22, duke@435: HPROF_GC_PRIM_ARRAY_DUMP = 0x23 duke@435: } hprofTag; duke@435: duke@435: // Default stack trace ID (used for dummy HPROF_TRACE record) duke@435: enum { mchung@831: STACK_TRACE_ID = 1, mchung@831: INITIAL_CLASS_COUNT = 200 duke@435: }; duke@435: duke@435: // Supports I/O operations on a dump file duke@435: duke@435: class DumpWriter : public StackObj { duke@435: private: duke@435: enum { duke@435: io_buffer_size = 8*M duke@435: }; duke@435: duke@435: int _fd; // file descriptor (-1 if dump file not open) duke@435: jlong _bytes_written; // number of byte written to dump file duke@435: duke@435: char* _buffer; // internal buffer duke@435: int _size; duke@435: int _pos; duke@435: duke@435: char* _error; // error message when I/O fails duke@435: duke@435: void set_file_descriptor(int fd) { _fd = fd; } duke@435: int file_descriptor() const { return _fd; } duke@435: duke@435: char* buffer() const { return _buffer; } duke@435: int buffer_size() const { return _size; } duke@435: int position() const { return _pos; } duke@435: void set_position(int pos) { _pos = pos; } duke@435: duke@435: void set_error(const char* error) { _error = (char*)os::strdup(error); } duke@435: duke@435: // all I/O go through this function duke@435: void write_internal(void* s, int len); duke@435: duke@435: public: duke@435: DumpWriter(const char* path); duke@435: ~DumpWriter(); duke@435: duke@435: void close(); duke@435: bool is_open() const { return file_descriptor() >= 0; } duke@435: void flush(); duke@435: duke@435: // total number of bytes written to the disk duke@435: jlong bytes_written() const { return _bytes_written; } duke@435: duke@435: // adjust the number of bytes written to disk (used to keep the count duke@435: // of the number of bytes written in case of rewrites) duke@435: void adjust_bytes_written(jlong n) { _bytes_written += n; } duke@435: duke@435: // number of (buffered) bytes as yet unwritten to the dump file duke@435: jlong bytes_unwritten() const { return (jlong)position(); } duke@435: duke@435: char* error() const { return _error; } duke@435: duke@435: jlong current_offset(); duke@435: void seek_to_offset(jlong pos); duke@435: duke@435: // writer functions duke@435: void write_raw(void* s, int len); duke@435: void write_u1(u1 x) { write_raw((void*)&x, 1); } duke@435: void write_u2(u2 x); duke@435: void write_u4(u4 x); duke@435: void write_u8(u8 x); duke@435: void write_objectID(oop o); coleenp@2497: void write_symbolID(Symbol* o); duke@435: void write_classID(Klass* k); mchung@831: void write_id(u4 x); duke@435: }; duke@435: duke@435: DumpWriter::DumpWriter(const char* path) { duke@435: // try to allocate an I/O buffer of io_buffer_size. If there isn't duke@435: // sufficient memory then reduce size until we can allocate something. duke@435: _size = io_buffer_size; duke@435: do { zgu@3900: _buffer = (char*)os::malloc(_size, mtInternal); duke@435: if (_buffer == NULL) { duke@435: _size = _size >> 1; duke@435: } duke@435: } while (_buffer == NULL && _size > 0); duke@435: assert((_size > 0 && _buffer != NULL) || (_size == 0 && _buffer == NULL), "sanity check"); duke@435: _pos = 0; duke@435: _error = NULL; duke@435: _bytes_written = 0L; duke@435: _fd = os::create_binary_file(path, false); // don't replace existing file duke@435: duke@435: // if the open failed we record the error duke@435: if (_fd < 0) { duke@435: _error = (char*)os::strdup(strerror(errno)); duke@435: } duke@435: } duke@435: duke@435: DumpWriter::~DumpWriter() { duke@435: // flush and close dump file coleenp@2463: if (is_open()) { duke@435: close(); duke@435: } duke@435: if (_buffer != NULL) os::free(_buffer); duke@435: if (_error != NULL) os::free(_error); duke@435: } duke@435: duke@435: // closes dump file (if open) duke@435: void DumpWriter::close() { duke@435: // flush and close dump file coleenp@2463: if (is_open()) { duke@435: flush(); duke@435: ::close(file_descriptor()); coleenp@2463: set_file_descriptor(-1); duke@435: } duke@435: } duke@435: duke@435: // write directly to the file duke@435: void DumpWriter::write_internal(void* s, int len) { duke@435: if (is_open()) { duke@435: int n = ::write(file_descriptor(), s, len); duke@435: if (n > 0) { duke@435: _bytes_written += n; duke@435: } duke@435: if (n != len) { duke@435: if (n < 0) { duke@435: set_error(strerror(errno)); duke@435: } else { duke@435: set_error("file size limit"); duke@435: } duke@435: ::close(file_descriptor()); duke@435: set_file_descriptor(-1); duke@435: } duke@435: } duke@435: } duke@435: duke@435: // write raw bytes duke@435: void DumpWriter::write_raw(void* s, int len) { duke@435: if (is_open()) { duke@435: // flush buffer to make toom duke@435: if ((position()+ len) >= buffer_size()) { duke@435: flush(); duke@435: } duke@435: duke@435: // buffer not available or too big to buffer it duke@435: if ((buffer() == NULL) || (len >= buffer_size())) { duke@435: write_internal(s, len); duke@435: } else { duke@435: // Should optimize this for u1/u2/u4/u8 sizes. duke@435: memcpy(buffer() + position(), s, len); duke@435: set_position(position() + len); duke@435: } duke@435: } duke@435: } duke@435: duke@435: // flush any buffered bytes to the file duke@435: void DumpWriter::flush() { duke@435: if (is_open() && position() > 0) { duke@435: write_internal(buffer(), position()); duke@435: set_position(0); duke@435: } duke@435: } duke@435: duke@435: duke@435: jlong DumpWriter::current_offset() { duke@435: if (is_open()) { duke@435: // the offset is the file offset plus whatever we have buffered duke@435: jlong offset = os::current_file_offset(file_descriptor()); duke@435: assert(offset >= 0, "lseek failed"); duke@435: return offset + (jlong)position(); duke@435: } else { duke@435: return (jlong)-1; duke@435: } duke@435: } duke@435: duke@435: void DumpWriter::seek_to_offset(jlong off) { duke@435: assert(off >= 0, "bad offset"); duke@435: duke@435: // need to flush before seeking duke@435: flush(); duke@435: duke@435: // may be closed due to I/O error duke@435: if (is_open()) { duke@435: jlong n = os::seek_to_file_offset(file_descriptor(), off); duke@435: assert(n >= 0, "lseek failed"); duke@435: } duke@435: } duke@435: duke@435: void DumpWriter::write_u2(u2 x) { duke@435: u2 v; duke@435: Bytes::put_Java_u2((address)&v, x); duke@435: write_raw((void*)&v, 2); duke@435: } duke@435: duke@435: void DumpWriter::write_u4(u4 x) { duke@435: u4 v; duke@435: Bytes::put_Java_u4((address)&v, x); duke@435: write_raw((void*)&v, 4); duke@435: } duke@435: duke@435: void DumpWriter::write_u8(u8 x) { duke@435: u8 v; duke@435: Bytes::put_Java_u8((address)&v, x); duke@435: write_raw((void*)&v, 8); duke@435: } duke@435: duke@435: void DumpWriter::write_objectID(oop o) { hseigel@5784: address a = (address)o; duke@435: #ifdef _LP64 duke@435: write_u8((u8)a); duke@435: #else duke@435: write_u4((u4)a); duke@435: #endif duke@435: } duke@435: coleenp@2497: void DumpWriter::write_symbolID(Symbol* s) { coleenp@2497: address a = (address)((uintptr_t)s); coleenp@2497: #ifdef _LP64 coleenp@2497: write_u8((u8)a); coleenp@2497: #else coleenp@2497: write_u4((u4)a); coleenp@2497: #endif coleenp@2497: } coleenp@2497: mchung@831: void DumpWriter::write_id(u4 x) { mchung@831: #ifdef _LP64 mchung@831: write_u8((u8) x); mchung@831: #else mchung@831: write_u4(x); mchung@831: #endif mchung@831: } mchung@831: duke@435: // We use java mirror as the class ID duke@435: void DumpWriter::write_classID(Klass* k) { duke@435: write_objectID(k->java_mirror()); duke@435: } duke@435: duke@435: duke@435: duke@435: // Support class with a collection of functions used when dumping the heap duke@435: duke@435: class DumperSupport : AllStatic { duke@435: public: duke@435: duke@435: // write a header of the given type duke@435: static void write_header(DumpWriter* writer, hprofTag tag, u4 len); duke@435: duke@435: // returns hprof tag for the given type signature coleenp@2497: static hprofTag sig2tag(Symbol* sig); duke@435: // returns hprof tag for the given basic type duke@435: static hprofTag type2tag(BasicType type); duke@435: duke@435: // returns the size of the instance of the given class coleenp@4037: static u4 instance_size(Klass* k); duke@435: duke@435: // dump a jfloat duke@435: static void dump_float(DumpWriter* writer, jfloat f); duke@435: // dump a jdouble duke@435: static void dump_double(DumpWriter* writer, jdouble d); duke@435: // dumps the raw value of the given field duke@435: static void dump_field_value(DumpWriter* writer, char type, address addr); duke@435: // dumps static fields of the given class coleenp@4037: static void dump_static_fields(DumpWriter* writer, Klass* k); duke@435: // dump the raw values of the instance fields of the given object duke@435: static void dump_instance_fields(DumpWriter* writer, oop o); duke@435: // dumps the definition of the instance fields for a given class coleenp@4037: static void dump_instance_field_descriptors(DumpWriter* writer, Klass* k); duke@435: // creates HPROF_GC_INSTANCE_DUMP record for the given object duke@435: static void dump_instance(DumpWriter* writer, oop o); duke@435: // creates HPROF_GC_CLASS_DUMP record for the given class and each of its duke@435: // array classes coleenp@4037: static void dump_class_and_array_classes(DumpWriter* writer, Klass* k); duke@435: // creates HPROF_GC_CLASS_DUMP record for a given primitive array duke@435: // class (and each multi-dimensional array class too) coleenp@4037: static void dump_basic_type_array_class(DumpWriter* writer, Klass* k); duke@435: duke@435: // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array duke@435: static void dump_object_array(DumpWriter* writer, objArrayOop array); duke@435: // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array duke@435: static void dump_prim_array(DumpWriter* writer, typeArrayOop array); mchung@831: // create HPROF_FRAME record for the given method and bci coleenp@4037: static void dump_stack_frame(DumpWriter* writer, int frame_serial_num, int class_serial_num, Method* m, int bci); duke@435: }; duke@435: duke@435: // write a header of the given type duke@435: void DumperSupport:: write_header(DumpWriter* writer, hprofTag tag, u4 len) { duke@435: writer->write_u1((u1)tag); duke@435: writer->write_u4(0); // current ticks duke@435: writer->write_u4(len); duke@435: } duke@435: duke@435: // returns hprof tag for the given type signature coleenp@2497: hprofTag DumperSupport::sig2tag(Symbol* sig) { duke@435: switch (sig->byte_at(0)) { duke@435: case JVM_SIGNATURE_CLASS : return HPROF_NORMAL_OBJECT; duke@435: case JVM_SIGNATURE_ARRAY : return HPROF_NORMAL_OBJECT; duke@435: case JVM_SIGNATURE_BYTE : return HPROF_BYTE; duke@435: case JVM_SIGNATURE_CHAR : return HPROF_CHAR; duke@435: case JVM_SIGNATURE_FLOAT : return HPROF_FLOAT; duke@435: case JVM_SIGNATURE_DOUBLE : return HPROF_DOUBLE; duke@435: case JVM_SIGNATURE_INT : return HPROF_INT; duke@435: case JVM_SIGNATURE_LONG : return HPROF_LONG; duke@435: case JVM_SIGNATURE_SHORT : return HPROF_SHORT; duke@435: case JVM_SIGNATURE_BOOLEAN : return HPROF_BOOLEAN; duke@435: default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; duke@435: } duke@435: } duke@435: duke@435: hprofTag DumperSupport::type2tag(BasicType type) { duke@435: switch (type) { duke@435: case T_BYTE : return HPROF_BYTE; duke@435: case T_CHAR : return HPROF_CHAR; duke@435: case T_FLOAT : return HPROF_FLOAT; duke@435: case T_DOUBLE : return HPROF_DOUBLE; duke@435: case T_INT : return HPROF_INT; duke@435: case T_LONG : return HPROF_LONG; duke@435: case T_SHORT : return HPROF_SHORT; duke@435: case T_BOOLEAN : return HPROF_BOOLEAN; duke@435: default : ShouldNotReachHere(); /* to shut up compiler */ return HPROF_BYTE; duke@435: } duke@435: } duke@435: duke@435: // dump a jfloat duke@435: void DumperSupport::dump_float(DumpWriter* writer, jfloat f) { duke@435: if (g_isnan(f)) { duke@435: writer->write_u4(0x7fc00000); // collapsing NaNs duke@435: } else { duke@435: union { duke@435: int i; duke@435: float f; duke@435: } u; duke@435: u.f = (float)f; duke@435: writer->write_u4((u4)u.i); duke@435: } duke@435: } duke@435: duke@435: // dump a jdouble duke@435: void DumperSupport::dump_double(DumpWriter* writer, jdouble d) { duke@435: union { duke@435: jlong l; duke@435: double d; duke@435: } u; duke@435: if (g_isnan(d)) { // collapsing NaNs duke@435: u.l = (jlong)(0x7ff80000); duke@435: u.l = (u.l << 32); duke@435: } else { duke@435: u.d = (double)d; duke@435: } duke@435: writer->write_u8((u8)u.l); duke@435: } duke@435: duke@435: // dumps the raw value of the given field duke@435: void DumperSupport::dump_field_value(DumpWriter* writer, char type, address addr) { duke@435: switch (type) { duke@435: case JVM_SIGNATURE_CLASS : duke@435: case JVM_SIGNATURE_ARRAY : { coleenp@548: oop o; coleenp@548: if (UseCompressedOops) { coleenp@548: o = oopDesc::load_decode_heap_oop((narrowOop*)addr); coleenp@548: } else { coleenp@548: o = oopDesc::load_decode_heap_oop((oop*)addr); coleenp@548: } duke@435: duke@435: // reflection and sun.misc.Unsafe classes may have a reference to a coleenp@4037: // Klass* so filter it out. coleenp@4037: assert(o->is_oop_or_null(), "should always be an oop"); duke@435: writer->write_objectID(o); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_BYTE : { duke@435: jbyte* b = (jbyte*)addr; duke@435: writer->write_u1((u1)*b); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_CHAR : { duke@435: jchar* c = (jchar*)addr; duke@435: writer->write_u2((u2)*c); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_SHORT : { duke@435: jshort* s = (jshort*)addr; duke@435: writer->write_u2((u2)*s); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_FLOAT : { duke@435: jfloat* f = (jfloat*)addr; duke@435: dump_float(writer, *f); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_DOUBLE : { duke@435: jdouble* f = (jdouble*)addr; duke@435: dump_double(writer, *f); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_INT : { duke@435: jint* i = (jint*)addr; duke@435: writer->write_u4((u4)*i); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_LONG : { duke@435: jlong* l = (jlong*)addr; duke@435: writer->write_u8((u8)*l); duke@435: break; duke@435: } duke@435: case JVM_SIGNATURE_BOOLEAN : { duke@435: jboolean* b = (jboolean*)addr; duke@435: writer->write_u1((u1)*b); duke@435: break; duke@435: } duke@435: default : ShouldNotReachHere(); duke@435: } duke@435: } duke@435: duke@435: // returns the size of the instance of the given class coleenp@4037: u4 DumperSupport::instance_size(Klass* k) { duke@435: HandleMark hm; duke@435: instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); duke@435: duke@435: int size = 0; duke@435: duke@435: for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { duke@435: if (!fld.access_flags().is_static()) { coleenp@2497: Symbol* sig = fld.signature(); duke@435: switch (sig->byte_at(0)) { duke@435: case JVM_SIGNATURE_CLASS : duke@435: case JVM_SIGNATURE_ARRAY : size += oopSize; break; duke@435: duke@435: case JVM_SIGNATURE_BYTE : duke@435: case JVM_SIGNATURE_BOOLEAN : size += 1; break; duke@435: duke@435: case JVM_SIGNATURE_CHAR : duke@435: case JVM_SIGNATURE_SHORT : size += 2; break; duke@435: duke@435: case JVM_SIGNATURE_INT : duke@435: case JVM_SIGNATURE_FLOAT : size += 4; break; duke@435: duke@435: case JVM_SIGNATURE_LONG : duke@435: case JVM_SIGNATURE_DOUBLE : size += 8; break; duke@435: duke@435: default : ShouldNotReachHere(); duke@435: } duke@435: } duke@435: } duke@435: return (u4)size; duke@435: } duke@435: duke@435: // dumps static fields of the given class coleenp@4037: void DumperSupport::dump_static_fields(DumpWriter* writer, Klass* k) { duke@435: HandleMark hm; duke@435: instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); duke@435: duke@435: // pass 1 - count the static fields duke@435: u2 field_count = 0; duke@435: for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { duke@435: if (fldc.access_flags().is_static()) field_count++; duke@435: } duke@435: duke@435: writer->write_u2(field_count); duke@435: duke@435: // pass 2 - dump the field descriptors and raw values duke@435: for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { duke@435: if (fld.access_flags().is_static()) { coleenp@2497: Symbol* sig = fld.signature(); duke@435: coleenp@2497: writer->write_symbolID(fld.name()); // name duke@435: writer->write_u1(sig2tag(sig)); // type duke@435: duke@435: // value duke@435: int offset = fld.offset(); never@2659: address addr = (address)ikh->java_mirror() + offset; duke@435: duke@435: dump_field_value(writer, sig->byte_at(0), addr); duke@435: } duke@435: } duke@435: } duke@435: duke@435: // dump the raw values of the instance fields of the given object duke@435: void DumperSupport::dump_instance_fields(DumpWriter* writer, oop o) { duke@435: HandleMark hm; duke@435: instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), o->klass()); duke@435: duke@435: for (FieldStream fld(ikh, false, false); !fld.eos(); fld.next()) { duke@435: if (!fld.access_flags().is_static()) { coleenp@2497: Symbol* sig = fld.signature(); duke@435: address addr = (address)o + fld.offset(); duke@435: duke@435: dump_field_value(writer, sig->byte_at(0), addr); duke@435: } duke@435: } duke@435: } duke@435: duke@435: // dumps the definition of the instance fields for a given class coleenp@4037: void DumperSupport::dump_instance_field_descriptors(DumpWriter* writer, Klass* k) { duke@435: HandleMark hm; duke@435: instanceKlassHandle ikh = instanceKlassHandle(Thread::current(), k); duke@435: duke@435: // pass 1 - count the instance fields duke@435: u2 field_count = 0; duke@435: for (FieldStream fldc(ikh, true, true); !fldc.eos(); fldc.next()) { duke@435: if (!fldc.access_flags().is_static()) field_count++; duke@435: } duke@435: duke@435: writer->write_u2(field_count); duke@435: duke@435: // pass 2 - dump the field descriptors duke@435: for (FieldStream fld(ikh, true, true); !fld.eos(); fld.next()) { duke@435: if (!fld.access_flags().is_static()) { coleenp@2497: Symbol* sig = fld.signature(); duke@435: coleenp@2497: writer->write_symbolID(fld.name()); // name duke@435: writer->write_u1(sig2tag(sig)); // type duke@435: } duke@435: } duke@435: } duke@435: duke@435: // creates HPROF_GC_INSTANCE_DUMP record for the given object duke@435: void DumperSupport::dump_instance(DumpWriter* writer, oop o) { coleenp@4037: Klass* k = o->klass(); duke@435: duke@435: writer->write_u1(HPROF_GC_INSTANCE_DUMP); duke@435: writer->write_objectID(o); duke@435: writer->write_u4(STACK_TRACE_ID); duke@435: duke@435: // class ID hseigel@4278: writer->write_classID(k); duke@435: duke@435: // number of bytes that follow duke@435: writer->write_u4(instance_size(k) ); duke@435: duke@435: // field values duke@435: dump_instance_fields(writer, o); duke@435: } duke@435: duke@435: // creates HPROF_GC_CLASS_DUMP record for the given class and each of duke@435: // its array classes coleenp@4037: void DumperSupport::dump_class_and_array_classes(DumpWriter* writer, Klass* k) { hseigel@4278: Klass* klass = k; coleenp@4037: assert(klass->oop_is_instance(), "not an InstanceKlass"); coleenp@4037: InstanceKlass* ik = (InstanceKlass*)klass; duke@435: duke@435: writer->write_u1(HPROF_GC_CLASS_DUMP); duke@435: duke@435: // class ID duke@435: writer->write_classID(ik); duke@435: writer->write_u4(STACK_TRACE_ID); duke@435: duke@435: // super class ID coleenp@4037: Klass* java_super = ik->java_super(); duke@435: if (java_super == NULL) { coleenp@4037: writer->write_objectID(oop(NULL)); duke@435: } else { hseigel@4278: writer->write_classID(java_super); duke@435: } duke@435: duke@435: writer->write_objectID(ik->class_loader()); duke@435: writer->write_objectID(ik->signers()); duke@435: writer->write_objectID(ik->protection_domain()); duke@435: duke@435: // reserved coleenp@4037: writer->write_objectID(oop(NULL)); coleenp@4037: writer->write_objectID(oop(NULL)); duke@435: duke@435: // instance size duke@435: writer->write_u4(DumperSupport::instance_size(k)); duke@435: duke@435: // size of constant pool - ignored by HAT 1.1 duke@435: writer->write_u2(0); duke@435: duke@435: // number of static fields duke@435: dump_static_fields(writer, k); duke@435: duke@435: // description of instance fields duke@435: dump_instance_field_descriptors(writer, k); duke@435: duke@435: // array classes duke@435: k = klass->array_klass_or_null(); duke@435: while (k != NULL) { hseigel@4278: Klass* klass = k; coleenp@4142: assert(klass->oop_is_objArray(), "not an ObjArrayKlass"); duke@435: duke@435: writer->write_u1(HPROF_GC_CLASS_DUMP); duke@435: writer->write_classID(klass); duke@435: writer->write_u4(STACK_TRACE_ID); duke@435: duke@435: // super class of array classes is java.lang.Object duke@435: java_super = klass->java_super(); duke@435: assert(java_super != NULL, "checking"); hseigel@4278: writer->write_classID(java_super); duke@435: duke@435: writer->write_objectID(ik->class_loader()); duke@435: writer->write_objectID(ik->signers()); duke@435: writer->write_objectID(ik->protection_domain()); duke@435: coleenp@4037: writer->write_objectID(oop(NULL)); // reserved coleenp@4037: writer->write_objectID(oop(NULL)); duke@435: writer->write_u4(0); // instance size duke@435: writer->write_u2(0); // constant pool duke@435: writer->write_u2(0); // static fields duke@435: writer->write_u2(0); // instance fields duke@435: duke@435: // get the array class for the next rank duke@435: k = klass->array_klass_or_null(); duke@435: } duke@435: } duke@435: duke@435: // creates HPROF_GC_CLASS_DUMP record for a given primitive array duke@435: // class (and each multi-dimensional array class too) coleenp@4037: void DumperSupport::dump_basic_type_array_class(DumpWriter* writer, Klass* k) { duke@435: // array classes duke@435: while (k != NULL) { hseigel@4278: Klass* klass = k; duke@435: duke@435: writer->write_u1(HPROF_GC_CLASS_DUMP); duke@435: writer->write_classID(klass); duke@435: writer->write_u4(STACK_TRACE_ID); duke@435: duke@435: // super class of array classes is java.lang.Object coleenp@4037: Klass* java_super = klass->java_super(); duke@435: assert(java_super != NULL, "checking"); hseigel@4278: writer->write_classID(java_super); duke@435: coleenp@4037: writer->write_objectID(oop(NULL)); // loader coleenp@4037: writer->write_objectID(oop(NULL)); // signers coleenp@4037: writer->write_objectID(oop(NULL)); // protection domain duke@435: coleenp@4037: writer->write_objectID(oop(NULL)); // reserved coleenp@4037: writer->write_objectID(oop(NULL)); duke@435: writer->write_u4(0); // instance size duke@435: writer->write_u2(0); // constant pool duke@435: writer->write_u2(0); // static fields duke@435: writer->write_u2(0); // instance fields duke@435: duke@435: // get the array class for the next rank duke@435: k = klass->array_klass_or_null(); duke@435: } duke@435: } duke@435: duke@435: // creates HPROF_GC_OBJ_ARRAY_DUMP record for the given object array duke@435: void DumperSupport::dump_object_array(DumpWriter* writer, objArrayOop array) { duke@435: duke@435: writer->write_u1(HPROF_GC_OBJ_ARRAY_DUMP); duke@435: writer->write_objectID(array); duke@435: writer->write_u4(STACK_TRACE_ID); duke@435: writer->write_u4((u4)array->length()); duke@435: duke@435: // array class ID hseigel@4278: writer->write_classID(array->klass()); duke@435: duke@435: // [id]* elements duke@435: for (int index=0; indexlength(); index++) { duke@435: oop o = array->obj_at(index); duke@435: writer->write_objectID(o); duke@435: } duke@435: } duke@435: duke@435: #define WRITE_ARRAY(Array, Type, Size) \ duke@435: for (int i=0; ilength(); i++) { writer->write_##Size((Size)array->Type##_at(i)); } duke@435: duke@435: duke@435: // creates HPROF_GC_PRIM_ARRAY_DUMP record for the given type array duke@435: void DumperSupport::dump_prim_array(DumpWriter* writer, typeArrayOop array) { coleenp@4142: BasicType type = TypeArrayKlass::cast(array->klass())->element_type(); duke@435: duke@435: writer->write_u1(HPROF_GC_PRIM_ARRAY_DUMP); duke@435: writer->write_objectID(array); duke@435: writer->write_u4(STACK_TRACE_ID); duke@435: writer->write_u4((u4)array->length()); duke@435: writer->write_u1(type2tag(type)); duke@435: duke@435: // nothing to copy duke@435: if (array->length() == 0) { duke@435: return; duke@435: } duke@435: duke@435: // If the byte ordering is big endian then we can copy most types directly kvn@464: int length_in_bytes = array->length() * type2aelembytes(type); duke@435: assert(length_in_bytes > 0, "nothing to copy"); duke@435: duke@435: switch (type) { duke@435: case T_INT : { duke@435: if (Bytes::is_Java_byte_ordering_different()) { duke@435: WRITE_ARRAY(array, int, u4); duke@435: } else { duke@435: writer->write_raw((void*)(array->int_at_addr(0)), length_in_bytes); duke@435: } duke@435: break; duke@435: } duke@435: case T_BYTE : { duke@435: writer->write_raw((void*)(array->byte_at_addr(0)), length_in_bytes); duke@435: break; duke@435: } duke@435: case T_CHAR : { duke@435: if (Bytes::is_Java_byte_ordering_different()) { duke@435: WRITE_ARRAY(array, char, u2); duke@435: } else { duke@435: writer->write_raw((void*)(array->char_at_addr(0)), length_in_bytes); duke@435: } duke@435: break; duke@435: } duke@435: case T_SHORT : { duke@435: if (Bytes::is_Java_byte_ordering_different()) { duke@435: WRITE_ARRAY(array, short, u2); duke@435: } else { duke@435: writer->write_raw((void*)(array->short_at_addr(0)), length_in_bytes); duke@435: } duke@435: break; duke@435: } duke@435: case T_BOOLEAN : { duke@435: if (Bytes::is_Java_byte_ordering_different()) { duke@435: WRITE_ARRAY(array, bool, u1); duke@435: } else { duke@435: writer->write_raw((void*)(array->bool_at_addr(0)), length_in_bytes); duke@435: } duke@435: break; duke@435: } duke@435: case T_LONG : { duke@435: if (Bytes::is_Java_byte_ordering_different()) { duke@435: WRITE_ARRAY(array, long, u8); duke@435: } else { duke@435: writer->write_raw((void*)(array->long_at_addr(0)), length_in_bytes); duke@435: } duke@435: break; duke@435: } duke@435: duke@435: // handle float/doubles in a special value to ensure than NaNs are duke@435: // written correctly. TO DO: Check if we can avoid this on processors that duke@435: // use IEEE 754. duke@435: duke@435: case T_FLOAT : { duke@435: for (int i=0; ilength(); i++) { duke@435: dump_float( writer, array->float_at(i) ); duke@435: } duke@435: break; duke@435: } duke@435: case T_DOUBLE : { duke@435: for (int i=0; ilength(); i++) { duke@435: dump_double( writer, array->double_at(i) ); duke@435: } duke@435: break; duke@435: } duke@435: default : ShouldNotReachHere(); duke@435: } duke@435: } duke@435: coleenp@4037: // create a HPROF_FRAME record of the given Method* and bci mchung@831: void DumperSupport::dump_stack_frame(DumpWriter* writer, mchung@831: int frame_serial_num, mchung@831: int class_serial_num, coleenp@4037: Method* m, mchung@831: int bci) { mchung@831: int line_number; mchung@831: if (m->is_native()) { mchung@831: line_number = -3; // native frame mchung@831: } else { mchung@831: line_number = m->line_number_from_bci(bci); mchung@831: } mchung@831: mchung@831: write_header(writer, HPROF_FRAME, 4*oopSize + 2*sizeof(u4)); mchung@831: writer->write_id(frame_serial_num); // frame serial number coleenp@2497: writer->write_symbolID(m->name()); // method's name coleenp@2497: writer->write_symbolID(m->signature()); // method's signature mchung@831: coleenp@4251: assert(m->method_holder()->oop_is_instance(), "not InstanceKlass"); coleenp@4251: writer->write_symbolID(m->method_holder()->source_file_name()); // source file name mchung@831: writer->write_u4(class_serial_num); // class serial number mchung@831: writer->write_u4((u4) line_number); // line number mchung@831: } duke@435: coleenp@2497: duke@435: // Support class used to generate HPROF_UTF8 records from the entries in the duke@435: // SymbolTable. duke@435: coleenp@2497: class SymbolTableDumper : public SymbolClosure { duke@435: private: duke@435: DumpWriter* _writer; duke@435: DumpWriter* writer() const { return _writer; } duke@435: public: duke@435: SymbolTableDumper(DumpWriter* writer) { _writer = writer; } coleenp@2497: void do_symbol(Symbol** p); duke@435: }; duke@435: coleenp@2497: void SymbolTableDumper::do_symbol(Symbol** p) { duke@435: ResourceMark rm; coleenp@2497: Symbol* sym = load_symbol(p); duke@435: int len = sym->utf8_length(); duke@435: if (len > 0) { duke@435: char* s = sym->as_utf8(); duke@435: DumperSupport::write_header(writer(), HPROF_UTF8, oopSize + len); coleenp@2497: writer()->write_symbolID(sym); duke@435: writer()->write_raw(s, len); duke@435: } duke@435: } duke@435: duke@435: // Support class used to generate HPROF_GC_ROOT_JNI_LOCAL records duke@435: duke@435: class JNILocalsDumper : public OopClosure { duke@435: private: duke@435: DumpWriter* _writer; duke@435: u4 _thread_serial_num; mchung@831: int _frame_num; duke@435: DumpWriter* writer() const { return _writer; } duke@435: public: duke@435: JNILocalsDumper(DumpWriter* writer, u4 thread_serial_num) { duke@435: _writer = writer; duke@435: _thread_serial_num = thread_serial_num; mchung@831: _frame_num = -1; // default - empty stack duke@435: } mchung@831: void set_frame_number(int n) { _frame_num = n; } duke@435: void do_oop(oop* obj_p); coleenp@548: void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } duke@435: }; duke@435: duke@435: duke@435: void JNILocalsDumper::do_oop(oop* obj_p) { duke@435: // ignore null or deleted handles duke@435: oop o = *obj_p; duke@435: if (o != NULL && o != JNIHandles::deleted_handle()) { duke@435: writer()->write_u1(HPROF_GC_ROOT_JNI_LOCAL); duke@435: writer()->write_objectID(o); duke@435: writer()->write_u4(_thread_serial_num); mchung@831: writer()->write_u4((u4)_frame_num); duke@435: } duke@435: } duke@435: duke@435: duke@435: // Support class used to generate HPROF_GC_ROOT_JNI_GLOBAL records duke@435: duke@435: class JNIGlobalsDumper : public OopClosure { duke@435: private: duke@435: DumpWriter* _writer; duke@435: DumpWriter* writer() const { return _writer; } duke@435: duke@435: public: duke@435: JNIGlobalsDumper(DumpWriter* writer) { duke@435: _writer = writer; duke@435: } duke@435: void do_oop(oop* obj_p); coleenp@548: void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } duke@435: }; duke@435: duke@435: void JNIGlobalsDumper::do_oop(oop* obj_p) { duke@435: oop o = *obj_p; duke@435: duke@435: // ignore these duke@435: if (o == NULL || o == JNIHandles::deleted_handle()) return; duke@435: duke@435: // we ignore global ref to symbols and other internal objects duke@435: if (o->is_instance() || o->is_objArray() || o->is_typeArray()) { duke@435: writer()->write_u1(HPROF_GC_ROOT_JNI_GLOBAL); duke@435: writer()->write_objectID(o); duke@435: writer()->write_objectID((oopDesc*)obj_p); // global ref ID duke@435: } duke@435: }; duke@435: duke@435: duke@435: // Support class used to generate HPROF_GC_ROOT_MONITOR_USED records duke@435: duke@435: class MonitorUsedDumper : public OopClosure { duke@435: private: duke@435: DumpWriter* _writer; duke@435: DumpWriter* writer() const { return _writer; } duke@435: public: duke@435: MonitorUsedDumper(DumpWriter* writer) { duke@435: _writer = writer; duke@435: } duke@435: void do_oop(oop* obj_p) { duke@435: writer()->write_u1(HPROF_GC_ROOT_MONITOR_USED); duke@435: writer()->write_objectID(*obj_p); duke@435: } coleenp@548: void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } duke@435: }; duke@435: duke@435: duke@435: // Support class used to generate HPROF_GC_ROOT_STICKY_CLASS records duke@435: coleenp@4037: class StickyClassDumper : public KlassClosure { duke@435: private: duke@435: DumpWriter* _writer; duke@435: DumpWriter* writer() const { return _writer; } duke@435: public: duke@435: StickyClassDumper(DumpWriter* writer) { duke@435: _writer = writer; duke@435: } coleenp@4037: void do_klass(Klass* k) { coleenp@4037: if (k->oop_is_instance()) { coleenp@4037: InstanceKlass* ik = InstanceKlass::cast(k); duke@435: writer()->write_u1(HPROF_GC_ROOT_STICKY_CLASS); duke@435: writer()->write_classID(ik); duke@435: } duke@435: } coleenp@4037: }; duke@435: duke@435: duke@435: class VM_HeapDumper; duke@435: duke@435: // Support class using when iterating over the heap. duke@435: duke@435: class HeapObjectDumper : public ObjectClosure { duke@435: private: duke@435: VM_HeapDumper* _dumper; duke@435: DumpWriter* _writer; duke@435: duke@435: VM_HeapDumper* dumper() { return _dumper; } duke@435: DumpWriter* writer() { return _writer; } duke@435: duke@435: // used to indicate that a record has been writen duke@435: void mark_end_of_record(); duke@435: duke@435: public: duke@435: HeapObjectDumper(VM_HeapDumper* dumper, DumpWriter* writer) { duke@435: _dumper = dumper; duke@435: _writer = writer; duke@435: } duke@435: duke@435: // called for each object in the heap duke@435: void do_object(oop o); duke@435: }; duke@435: duke@435: void HeapObjectDumper::do_object(oop o) { duke@435: // hide the sentinel for deleted handles duke@435: if (o == JNIHandles::deleted_handle()) return; duke@435: duke@435: // skip classes as these emitted as HPROF_GC_CLASS_DUMP records never@1577: if (o->klass() == SystemDictionary::Class_klass()) { duke@435: if (!java_lang_Class::is_primitive(o)) { duke@435: return; duke@435: } duke@435: } duke@435: duke@435: // create a HPROF_GC_INSTANCE record for each object duke@435: if (o->is_instance()) { duke@435: DumperSupport::dump_instance(writer(), o); duke@435: mark_end_of_record(); duke@435: } else { duke@435: // create a HPROF_GC_OBJ_ARRAY_DUMP record for each object array duke@435: if (o->is_objArray()) { duke@435: DumperSupport::dump_object_array(writer(), objArrayOop(o)); duke@435: mark_end_of_record(); duke@435: } else { duke@435: // create a HPROF_GC_PRIM_ARRAY_DUMP record for each type array duke@435: if (o->is_typeArray()) { duke@435: DumperSupport::dump_prim_array(writer(), typeArrayOop(o)); duke@435: mark_end_of_record(); duke@435: } duke@435: } duke@435: } duke@435: } duke@435: duke@435: // The VM operation that performs the heap dump duke@435: class VM_HeapDumper : public VM_GC_Operation { duke@435: private: ysr@1050: static VM_HeapDumper* _global_dumper; ysr@1050: static DumpWriter* _global_writer; ysr@1050: DumpWriter* _local_writer; thurka@2130: JavaThread* _oome_thread; coleenp@4037: Method* _oome_constructor; duke@435: bool _gc_before_heap_dump; duke@435: bool _is_segmented_dump; duke@435: jlong _dump_start; mchung@831: GrowableArray* _klass_map; mchung@831: ThreadStackTrace** _stack_traces; mchung@831: int _num_threads; duke@435: ysr@1050: // accessors and setters ysr@1050: static VM_HeapDumper* dumper() { assert(_global_dumper != NULL, "Error"); return _global_dumper; } ysr@1050: static DumpWriter* writer() { assert(_global_writer != NULL, "Error"); return _global_writer; } ysr@1050: void set_global_dumper() { ysr@1050: assert(_global_dumper == NULL, "Error"); ysr@1050: _global_dumper = this; ysr@1050: } ysr@1050: void set_global_writer() { ysr@1050: assert(_global_writer == NULL, "Error"); ysr@1050: _global_writer = _local_writer; ysr@1050: } ysr@1050: void clear_global_dumper() { _global_dumper = NULL; } ysr@1050: void clear_global_writer() { _global_writer = NULL; } ysr@1050: duke@435: bool is_segmented_dump() const { return _is_segmented_dump; } duke@435: void set_segmented_dump() { _is_segmented_dump = true; } duke@435: jlong dump_start() const { return _dump_start; } duke@435: void set_dump_start(jlong pos); duke@435: duke@435: bool skip_operation() const; duke@435: duke@435: // writes a HPROF_LOAD_CLASS record coleenp@4037: static void do_load_class(Klass* k); duke@435: duke@435: // writes a HPROF_GC_CLASS_DUMP record for the given class duke@435: // (and each array class too) coleenp@4037: static void do_class_dump(Klass* k); duke@435: duke@435: // writes a HPROF_GC_CLASS_DUMP records for a given basic type duke@435: // array (and each multi-dimensional array too) coleenp@4037: static void do_basic_type_array_class_dump(Klass* k); duke@435: duke@435: // HPROF_GC_ROOT_THREAD_OBJ records mchung@831: int do_thread(JavaThread* thread, u4 thread_serial_num); duke@435: void do_threads(); duke@435: mchung@831: void add_class_serial_number(Klass* k, int serial_num) { mchung@831: _klass_map->at_put_grow(serial_num, k); mchung@831: } mchung@831: mchung@831: // HPROF_TRACE and HPROF_FRAME records mchung@831: void dump_stack_traces(); mchung@831: duke@435: // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record duke@435: void write_dump_header(); duke@435: duke@435: // fixes up the length of the current dump record duke@435: void write_current_dump_record_length(); duke@435: duke@435: // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END duke@435: // record in the case of a segmented heap dump) duke@435: void end_of_dump(); duke@435: duke@435: public: thurka@2130: VM_HeapDumper(DumpWriter* writer, bool gc_before_heap_dump, bool oome) : duke@435: VM_GC_Operation(0 /* total collections, dummy, ignored */, brutisso@2532: GCCause::_heap_dump /* GC Cause */, duke@435: 0 /* total full collections, dummy, ignored */, duke@435: gc_before_heap_dump) { ysr@1050: _local_writer = writer; duke@435: _gc_before_heap_dump = gc_before_heap_dump; duke@435: _is_segmented_dump = false; duke@435: _dump_start = (jlong)-1; zgu@3900: _klass_map = new (ResourceObj::C_HEAP, mtInternal) GrowableArray(INITIAL_CLASS_COUNT, true); mchung@831: _stack_traces = NULL; mchung@831: _num_threads = 0; thurka@2130: if (oome) { thurka@2130: assert(!Thread::current()->is_VM_thread(), "Dump from OutOfMemoryError cannot be called by the VMThread"); thurka@2130: // get OutOfMemoryError zero-parameter constructor coleenp@4037: InstanceKlass* oome_ik = InstanceKlass::cast(SystemDictionary::OutOfMemoryError_klass()); thurka@2130: _oome_constructor = oome_ik->find_method(vmSymbols::object_initializer_name(), thurka@2130: vmSymbols::void_method_signature()); thurka@2130: // get thread throwing OOME when generating the heap dump at OOME thurka@2130: _oome_thread = JavaThread::current(); thurka@2130: } else { thurka@2130: _oome_thread = NULL; thurka@2130: _oome_constructor = NULL; thurka@2130: } mchung@831: } mchung@831: ~VM_HeapDumper() { mchung@831: if (_stack_traces != NULL) { mchung@831: for (int i=0; i < _num_threads; i++) { mchung@831: delete _stack_traces[i]; mchung@831: } zgu@3900: FREE_C_HEAP_ARRAY(ThreadStackTrace*, _stack_traces, mtInternal); mchung@831: } mchung@831: delete _klass_map; duke@435: } duke@435: duke@435: VMOp_Type type() const { return VMOp_HeapDumper; } duke@435: // used to mark sub-record boundary duke@435: void check_segment_length(); duke@435: void doit(); duke@435: }; duke@435: ysr@1050: VM_HeapDumper* VM_HeapDumper::_global_dumper = NULL; ysr@1050: DumpWriter* VM_HeapDumper::_global_writer = NULL; ysr@1050: duke@435: bool VM_HeapDumper::skip_operation() const { duke@435: return false; duke@435: } duke@435: duke@435: // sets the dump starting position duke@435: void VM_HeapDumper::set_dump_start(jlong pos) { duke@435: _dump_start = pos; duke@435: } duke@435: duke@435: // writes a HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT record duke@435: void VM_HeapDumper::write_dump_header() { duke@435: if (writer()->is_open()) { duke@435: if (is_segmented_dump()) { duke@435: writer()->write_u1(HPROF_HEAP_DUMP_SEGMENT); duke@435: } else { duke@435: writer()->write_u1(HPROF_HEAP_DUMP); duke@435: } duke@435: writer()->write_u4(0); // current ticks duke@435: duke@435: // record the starting position for the dump (its length will be fixed up later) duke@435: set_dump_start(writer()->current_offset()); duke@435: writer()->write_u4(0); duke@435: } duke@435: } duke@435: duke@435: // fixes up the length of the current dump record duke@435: void VM_HeapDumper::write_current_dump_record_length() { duke@435: if (writer()->is_open()) { duke@435: assert(dump_start() >= 0, "no dump start recorded"); duke@435: duke@435: // calculate the size of the dump record duke@435: jlong dump_end = writer()->current_offset(); duke@435: jlong dump_len = (dump_end - dump_start() - 4); duke@435: duke@435: // record length must fit in a u4 duke@435: if (dump_len > (jlong)(4L*(jlong)G)) { duke@435: warning("record is too large"); duke@435: } duke@435: duke@435: // seek to the dump start and fix-up the length duke@435: writer()->seek_to_offset(dump_start()); duke@435: writer()->write_u4((u4)dump_len); duke@435: duke@435: // adjust the total size written to keep the bytes written correct. duke@435: writer()->adjust_bytes_written(-((long) sizeof(u4))); duke@435: duke@435: // seek to dump end so we can continue duke@435: writer()->seek_to_offset(dump_end); duke@435: duke@435: // no current dump record duke@435: set_dump_start((jlong)-1); duke@435: } duke@435: } duke@435: duke@435: // used on a sub-record boundary to check if we need to start a duke@435: // new segment. duke@435: void VM_HeapDumper::check_segment_length() { duke@435: if (writer()->is_open()) { duke@435: if (is_segmented_dump()) { duke@435: // don't use current_offset that would be too expensive on a per record basis duke@435: jlong dump_end = writer()->bytes_written() + writer()->bytes_unwritten(); duke@435: assert(dump_end == writer()->current_offset(), "checking"); duke@435: jlong dump_len = (dump_end - dump_start() - 4); duke@435: assert(dump_len >= 0 && dump_len <= max_juint, "bad dump length"); duke@435: duke@435: if (dump_len > (jlong)HeapDumpSegmentSize) { duke@435: write_current_dump_record_length(); duke@435: write_dump_header(); duke@435: } duke@435: } duke@435: } duke@435: } duke@435: duke@435: // fixes up the current dump record )and writes HPROF_HEAP_DUMP_END duke@435: // record in the case of a segmented heap dump) duke@435: void VM_HeapDumper::end_of_dump() { duke@435: if (writer()->is_open()) { duke@435: write_current_dump_record_length(); duke@435: duke@435: // for segmented dump we write the end record duke@435: if (is_segmented_dump()) { duke@435: writer()->write_u1(HPROF_HEAP_DUMP_END); duke@435: writer()->write_u4(0); duke@435: writer()->write_u4(0); duke@435: } duke@435: } duke@435: } duke@435: duke@435: // marks sub-record boundary duke@435: void HeapObjectDumper::mark_end_of_record() { duke@435: dumper()->check_segment_length(); duke@435: } duke@435: duke@435: // writes a HPROF_LOAD_CLASS record for the class (and each of its duke@435: // array classes) coleenp@4037: void VM_HeapDumper::do_load_class(Klass* k) { duke@435: static u4 class_serial_num = 0; duke@435: duke@435: // len of HPROF_LOAD_CLASS record duke@435: u4 remaining = 2*oopSize + 2*sizeof(u4); duke@435: duke@435: // write a HPROF_LOAD_CLASS for the class and each array class duke@435: do { ysr@1050: DumperSupport::write_header(writer(), HPROF_LOAD_CLASS, remaining); duke@435: duke@435: // class serial number is just a number ysr@1050: writer()->write_u4(++class_serial_num); duke@435: duke@435: // class ID hseigel@4278: Klass* klass = k; ysr@1050: writer()->write_classID(klass); duke@435: coleenp@4037: // add the Klass* and class serial number pair ysr@1050: dumper()->add_class_serial_number(klass, class_serial_num); mchung@831: ysr@1050: writer()->write_u4(STACK_TRACE_ID); duke@435: duke@435: // class name ID coleenp@2497: Symbol* name = klass->name(); coleenp@2497: writer()->write_symbolID(name); duke@435: duke@435: // write a LOAD_CLASS record for the array type (if it exists) duke@435: k = klass->array_klass_or_null(); duke@435: } while (k != NULL); duke@435: } duke@435: duke@435: // writes a HPROF_GC_CLASS_DUMP record for the given class coleenp@4037: void VM_HeapDumper::do_class_dump(Klass* k) { ysr@1050: DumperSupport::dump_class_and_array_classes(writer(), k); duke@435: } duke@435: duke@435: // writes a HPROF_GC_CLASS_DUMP records for a given basic type duke@435: // array (and each multi-dimensional array too) coleenp@4037: void VM_HeapDumper::do_basic_type_array_class_dump(Klass* k) { ysr@1050: DumperSupport::dump_basic_type_array_class(writer(), k); duke@435: } duke@435: duke@435: // Walk the stack of the given thread. duke@435: // Dumps a HPROF_GC_ROOT_JAVA_FRAME record for each local duke@435: // Dumps a HPROF_GC_ROOT_JNI_LOCAL record for each JNI local mchung@831: // mchung@831: // It returns the number of Java frames in this thread stack mchung@831: int VM_HeapDumper::do_thread(JavaThread* java_thread, u4 thread_serial_num) { duke@435: JNILocalsDumper blk(writer(), thread_serial_num); duke@435: duke@435: oop threadObj = java_thread->threadObj(); duke@435: assert(threadObj != NULL, "sanity check"); duke@435: mchung@831: int stack_depth = 0; duke@435: if (java_thread->has_last_Java_frame()) { duke@435: duke@435: // vframes are resource allocated duke@435: Thread* current_thread = Thread::current(); duke@435: ResourceMark rm(current_thread); duke@435: HandleMark hm(current_thread); duke@435: duke@435: RegisterMap reg_map(java_thread); duke@435: frame f = java_thread->last_frame(); duke@435: vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); mchung@831: frame* last_entry_frame = NULL; thurka@2130: int extra_frames = 0; duke@435: thurka@2130: if (java_thread == _oome_thread && _oome_constructor != NULL) { thurka@2130: extra_frames++; thurka@2130: } duke@435: while (vf != NULL) { mchung@831: blk.set_frame_number(stack_depth); duke@435: if (vf->is_java_frame()) { duke@435: duke@435: // java frame (interpreted, compiled, ...) duke@435: javaVFrame *jvf = javaVFrame::cast(vf); duke@435: if (!(jvf->method()->is_native())) { duke@435: StackValueCollection* locals = jvf->locals(); duke@435: for (int slot=0; slotsize(); slot++) { duke@435: if (locals->at(slot)->type() == T_OBJECT) { duke@435: oop o = locals->obj_at(slot)(); duke@435: duke@435: if (o != NULL) { duke@435: writer()->write_u1(HPROF_GC_ROOT_JAVA_FRAME); duke@435: writer()->write_objectID(o); duke@435: writer()->write_u4(thread_serial_num); thurka@2130: writer()->write_u4((u4) (stack_depth + extra_frames)); duke@435: } duke@435: } duke@435: } mchung@831: } else { mchung@831: // native frame mchung@831: if (stack_depth == 0) { mchung@831: // JNI locals for the top frame. mchung@831: java_thread->active_handles()->oops_do(&blk); mchung@831: } else { mchung@831: if (last_entry_frame != NULL) { mchung@831: // JNI locals for the entry frame mchung@831: assert(last_entry_frame->is_entry_frame(), "checking"); mchung@831: last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(&blk); mchung@831: } mchung@831: } duke@435: } mchung@831: // increment only for Java frames mchung@831: stack_depth++; mchung@831: last_entry_frame = NULL; mchung@831: duke@435: } else { duke@435: // externalVFrame - if it's an entry frame then report any JNI locals mchung@831: // as roots when we find the corresponding native javaVFrame duke@435: frame* fr = vf->frame_pointer(); duke@435: assert(fr != NULL, "sanity check"); duke@435: if (fr->is_entry_frame()) { mchung@831: last_entry_frame = fr; duke@435: } duke@435: } duke@435: vf = vf->sender(); duke@435: } mchung@831: } else { mchung@831: // no last java frame but there may be JNI locals mchung@831: java_thread->active_handles()->oops_do(&blk); duke@435: } mchung@831: return stack_depth; duke@435: } duke@435: duke@435: duke@435: // write a HPROF_GC_ROOT_THREAD_OBJ record for each java thread. Then walk duke@435: // the stack so that locals and JNI locals are dumped. duke@435: void VM_HeapDumper::do_threads() { mchung@831: for (int i=0; i < _num_threads; i++) { mchung@831: JavaThread* thread = _stack_traces[i]->thread(); duke@435: oop threadObj = thread->threadObj(); mchung@831: u4 thread_serial_num = i+1; mchung@831: u4 stack_serial_num = thread_serial_num + STACK_TRACE_ID; mchung@831: writer()->write_u1(HPROF_GC_ROOT_THREAD_OBJ); mchung@831: writer()->write_objectID(threadObj); mchung@831: writer()->write_u4(thread_serial_num); // thread number mchung@831: writer()->write_u4(stack_serial_num); // stack trace serial number mchung@831: int num_frames = do_thread(thread, thread_serial_num); mchung@831: assert(num_frames == _stack_traces[i]->get_stack_depth(), mchung@831: "total number of Java frames not matched"); duke@435: } duke@435: } duke@435: duke@435: duke@435: // The VM operation that dumps the heap. The dump consists of the following duke@435: // records: duke@435: // duke@435: // HPROF_HEADER duke@435: // [HPROF_UTF8]* duke@435: // [HPROF_LOAD_CLASS]* mchung@831: // [[HPROF_FRAME]*|HPROF_TRACE]* duke@435: // [HPROF_GC_CLASS_DUMP]* duke@435: // HPROF_HEAP_DUMP duke@435: // mchung@831: // The HPROF_TRACE records represent the stack traces where the heap dump mchung@831: // is generated and a "dummy trace" record which does not include mchung@831: // any frames. The dummy trace record is used to be referenced as the mchung@831: // unknown object alloc site. duke@435: // duke@435: // The HPROF_HEAP_DUMP record has a length following by sub-records. To allow duke@435: // the heap dump be generated in a single pass we remember the position of duke@435: // the dump length and fix it up after all sub-records have been written. duke@435: // To generate the sub-records we iterate over the heap, writing duke@435: // HPROF_GC_INSTANCE_DUMP, HPROF_GC_OBJ_ARRAY_DUMP, and HPROF_GC_PRIM_ARRAY_DUMP duke@435: // records as we go. Once that is done we write records for some of the GC duke@435: // roots. duke@435: duke@435: void VM_HeapDumper::doit() { duke@435: duke@435: HandleMark hm; duke@435: CollectedHeap* ch = Universe::heap(); poonam@3272: poonam@3272: ch->ensure_parsability(false); // must happen, even if collection does poonam@3272: // not happen (e.g. due to GC_locker) poonam@3272: duke@435: if (_gc_before_heap_dump) { poonam@3272: if (GC_locker::is_active()) { poonam@3272: warning("GC locker is held; pre-heapdump GC was skipped"); poonam@3272: } else { poonam@3272: ch->collect_as_vm_thread(GCCause::_heap_dump); poonam@3272: } duke@435: } duke@435: ysr@1050: // At this point we should be the only dumper active, so ysr@1050: // the following should be safe. ysr@1050: set_global_dumper(); ysr@1050: set_global_writer(); ysr@1050: duke@435: // Write the file header - use 1.0.2 for large heaps, otherwise 1.0.1 ysr@777: size_t used = ch->used(); duke@435: const char* header; duke@435: if (used > (size_t)SegmentedHeapDumpThreshold) { duke@435: set_segmented_dump(); duke@435: header = "JAVA PROFILE 1.0.2"; duke@435: } else { duke@435: header = "JAVA PROFILE 1.0.1"; duke@435: } ysr@1050: duke@435: // header is few bytes long - no chance to overflow int duke@435: writer()->write_raw((void*)header, (int)strlen(header)); duke@435: writer()->write_u1(0); // terminator duke@435: writer()->write_u4(oopSize); duke@435: writer()->write_u8(os::javaTimeMillis()); duke@435: duke@435: // HPROF_UTF8 records duke@435: SymbolTableDumper sym_dumper(writer()); coleenp@2497: SymbolTable::symbols_do(&sym_dumper); duke@435: duke@435: // write HPROF_LOAD_CLASS records duke@435: SystemDictionary::classes_do(&do_load_class); duke@435: Universe::basic_type_classes_do(&do_load_class); duke@435: mchung@831: // write HPROF_FRAME and HPROF_TRACE records mchung@831: // this must be called after _klass_map is built when iterating the classes above. mchung@831: dump_stack_traces(); mchung@831: duke@435: // write HPROF_HEAP_DUMP or HPROF_HEAP_DUMP_SEGMENT duke@435: write_dump_header(); duke@435: duke@435: // Writes HPROF_GC_CLASS_DUMP records duke@435: SystemDictionary::classes_do(&do_class_dump); duke@435: Universe::basic_type_classes_do(&do_basic_type_array_class_dump); duke@435: check_segment_length(); duke@435: duke@435: // writes HPROF_GC_INSTANCE_DUMP records. duke@435: // After each sub-record is written check_segment_length will be invoked. When duke@435: // generated a segmented heap dump this allows us to check if the current duke@435: // segment exceeds a threshold and if so, then a new segment is started. duke@435: // The HPROF_GC_CLASS_DUMP and HPROF_GC_INSTANCE_DUMP are the vast bulk duke@435: // of the heap dump. duke@435: HeapObjectDumper obj_dumper(this, writer()); jmasa@952: Universe::heap()->safe_object_iterate(&obj_dumper); duke@435: duke@435: // HPROF_GC_ROOT_THREAD_OBJ + frames + jni locals duke@435: do_threads(); duke@435: check_segment_length(); duke@435: duke@435: // HPROF_GC_ROOT_MONITOR_USED duke@435: MonitorUsedDumper mon_dumper(writer()); duke@435: ObjectSynchronizer::oops_do(&mon_dumper); duke@435: check_segment_length(); duke@435: duke@435: // HPROF_GC_ROOT_JNI_GLOBAL duke@435: JNIGlobalsDumper jni_dumper(writer()); duke@435: JNIHandles::oops_do(&jni_dumper); duke@435: check_segment_length(); duke@435: duke@435: // HPROF_GC_ROOT_STICKY_CLASS duke@435: StickyClassDumper class_dumper(writer()); coleenp@4037: SystemDictionary::always_strong_classes_do(&class_dumper); duke@435: duke@435: // fixes up the length of the dump record. In the case of a segmented duke@435: // heap then the HPROF_HEAP_DUMP_END record is also written. duke@435: end_of_dump(); ysr@1050: ysr@1050: // Now we clear the global variables, so that a future dumper might run. ysr@1050: clear_global_dumper(); ysr@1050: clear_global_writer(); duke@435: } duke@435: mchung@831: void VM_HeapDumper::dump_stack_traces() { mchung@831: // write a HPROF_TRACE record without any frames to be referenced as object alloc sites mchung@831: DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4)); mchung@831: writer()->write_u4((u4) STACK_TRACE_ID); mchung@831: writer()->write_u4(0); // thread number mchung@831: writer()->write_u4(0); // frame count mchung@831: zgu@3900: _stack_traces = NEW_C_HEAP_ARRAY(ThreadStackTrace*, Threads::number_of_threads(), mtInternal); mchung@831: int frame_serial_num = 0; mchung@831: for (JavaThread* thread = Threads::first(); thread != NULL ; thread = thread->next()) { mchung@831: oop threadObj = thread->threadObj(); mchung@831: if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { mchung@831: // dump thread stack trace mchung@831: ThreadStackTrace* stack_trace = new ThreadStackTrace(thread, false); mchung@831: stack_trace->dump_stack_at_safepoint(-1); mchung@831: _stack_traces[_num_threads++] = stack_trace; mchung@831: mchung@831: // write HPROF_FRAME records for this thread's stack trace mchung@831: int depth = stack_trace->get_stack_depth(); mchung@831: int thread_frame_start = frame_serial_num; thurka@2130: int extra_frames = 0; thurka@2130: // write fake frame that makes it look like the thread, which caused OOME, thurka@2130: // is in the OutOfMemoryError zero-parameter constructor thurka@2130: if (thread == _oome_thread && _oome_constructor != NULL) { hseigel@4278: int oome_serial_num = _klass_map->find(_oome_constructor->method_holder()); thurka@2130: // the class serial number starts from 1 thurka@2130: assert(oome_serial_num > 0, "OutOfMemoryError class not found"); thurka@2130: DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, oome_serial_num, thurka@2130: _oome_constructor, 0); thurka@2130: extra_frames++; thurka@2130: } mchung@831: for (int j=0; j < depth; j++) { mchung@831: StackFrameInfo* frame = stack_trace->stack_frame_at(j); coleenp@4037: Method* m = frame->method(); hseigel@4278: int class_serial_num = _klass_map->find(m->method_holder()); mchung@831: // the class serial number starts from 1 mchung@831: assert(class_serial_num > 0, "class not found"); mchung@831: DumperSupport::dump_stack_frame(writer(), ++frame_serial_num, class_serial_num, m, frame->bci()); mchung@831: } thurka@2130: depth += extra_frames; mchung@831: mchung@831: // write HPROF_TRACE record for one thread mchung@831: DumperSupport::write_header(writer(), HPROF_TRACE, 3*sizeof(u4) + depth*oopSize); mchung@831: int stack_serial_num = _num_threads + STACK_TRACE_ID; mchung@831: writer()->write_u4(stack_serial_num); // stack trace serial number mchung@831: writer()->write_u4((u4) _num_threads); // thread serial number mchung@831: writer()->write_u4(depth); // frame count mchung@831: for (int j=1; j <= depth; j++) { mchung@831: writer()->write_id(thread_frame_start + j); mchung@831: } mchung@831: } mchung@831: } mchung@831: } duke@435: duke@435: // dump the heap to given path. duke@435: int HeapDumper::dump(const char* path) { duke@435: assert(path != NULL && strlen(path) > 0, "path missing"); duke@435: duke@435: // print message in interactive case duke@435: if (print_to_tty()) { duke@435: tty->print_cr("Dumping heap to %s ...", path); duke@435: timer()->start(); duke@435: } duke@435: duke@435: // create the dump writer. If the file can be opened then bail duke@435: DumpWriter writer(path); duke@435: if (!writer.is_open()) { duke@435: set_error(writer.error()); duke@435: if (print_to_tty()) { duke@435: tty->print_cr("Unable to create %s: %s", path, duke@435: (error() != NULL) ? error() : "reason unknown"); duke@435: } duke@435: return -1; duke@435: } duke@435: duke@435: // generate the dump thurka@2130: VM_HeapDumper dumper(&writer, _gc_before_heap_dump, _oome); ysr@1050: if (Thread::current()->is_VM_thread()) { ysr@1050: assert(SafepointSynchronize::is_at_safepoint(), "Expected to be called at a safepoint"); ysr@1050: dumper.doit(); ysr@1050: } else { ysr@1050: VMThread::execute(&dumper); ysr@1050: } duke@435: duke@435: // close dump file and record any error that the writer may have encountered duke@435: writer.close(); duke@435: set_error(writer.error()); duke@435: duke@435: // print message in interactive case duke@435: if (print_to_tty()) { duke@435: timer()->stop(); duke@435: if (error() == NULL) { duke@435: char msg[256]; duke@435: sprintf(msg, "Heap dump file created [%s bytes in %3.3f secs]", hseigel@4465: JLONG_FORMAT, timer()->seconds()); duke@435: tty->print_cr(msg, writer.bytes_written()); duke@435: } else { duke@435: tty->print_cr("Dump file is incomplete: %s", writer.error()); duke@435: } duke@435: } duke@435: duke@435: return (writer.error() == NULL) ? 0 : -1; duke@435: } duke@435: duke@435: // stop timer (if still active), and free any error string we might be holding duke@435: HeapDumper::~HeapDumper() { duke@435: if (timer()->is_active()) { duke@435: timer()->stop(); duke@435: } duke@435: set_error(NULL); duke@435: } duke@435: duke@435: duke@435: // returns the error string (resource allocated), or NULL duke@435: char* HeapDumper::error_as_C_string() const { duke@435: if (error() != NULL) { duke@435: char* str = NEW_RESOURCE_ARRAY(char, strlen(error())+1); duke@435: strcpy(str, error()); duke@435: return str; duke@435: } else { duke@435: return NULL; duke@435: } duke@435: } duke@435: duke@435: // set the error string duke@435: void HeapDumper::set_error(char* error) { duke@435: if (_error != NULL) { duke@435: os::free(_error); duke@435: } duke@435: if (error == NULL) { duke@435: _error = NULL; duke@435: } else { duke@435: _error = os::strdup(error); duke@435: assert(_error != NULL, "allocation failure"); duke@435: } duke@435: } duke@435: thurka@2130: // Called by out-of-memory error reporting by a single Java thread thurka@2130: // outside of a JVM safepoint thurka@2130: void HeapDumper::dump_heap_from_oome() { thurka@2130: HeapDumper::dump_heap(true); thurka@2130: } thurka@2130: ysr@1050: // Called by error reporting by a single Java thread outside of a JVM safepoint, ysr@1050: // or by heap dumping by the VM thread during a (GC) safepoint. Thus, these various ysr@1050: // callers are strictly serialized and guaranteed not to interfere below. For more ysr@1050: // general use, however, this method will need modification to prevent ysr@1050: // inteference when updating the static variables base_path and dump_file_seq below. duke@435: void HeapDumper::dump_heap() { thurka@2130: HeapDumper::dump_heap(false); thurka@2130: } thurka@2130: thurka@2130: void HeapDumper::dump_heap(bool oome) { ysr@1050: static char base_path[JVM_MAXPATHLEN] = {'\0'}; ysr@1050: static uint dump_file_seq = 0; coleenp@2463: char* my_path; coleenp@2463: const int max_digit_chars = 20; coleenp@2463: coleenp@2463: const char* dump_file_name = "java_pid"; coleenp@2463: const char* dump_file_ext = ".hprof"; duke@435: duke@435: // The dump file defaults to java_pid.hprof in the current working duke@435: // directory. HeapDumpPath= can be used to specify an alternative duke@435: // dump file name or a directory where dump file is created. ysr@1050: if (dump_file_seq == 0) { // first time in, we initialize base_path coleenp@2463: // Calculate potentially longest base path and check if we have enough coleenp@2463: // allocated statically. coleenp@2463: const size_t total_length = coleenp@2463: (HeapDumpPath == NULL ? 0 : strlen(HeapDumpPath)) + coleenp@2463: strlen(os::file_separator()) + max_digit_chars + coleenp@2463: strlen(dump_file_name) + strlen(dump_file_ext) + 1; coleenp@2463: if (total_length > sizeof(base_path)) { coleenp@2463: warning("Cannot create heap dump file. HeapDumpPath is too long."); coleenp@2463: return; coleenp@2463: } coleenp@2463: ysr@1050: bool use_default_filename = true; ysr@1050: if (HeapDumpPath == NULL || HeapDumpPath[0] == '\0') { ysr@1050: // HeapDumpPath= not specified duke@435: } else { coleenp@2463: strncpy(base_path, HeapDumpPath, sizeof(base_path)); ysr@1050: // check if the path is a directory (must exist) ysr@1050: DIR* dir = os::opendir(base_path); ysr@1050: if (dir == NULL) { ysr@1050: use_default_filename = false; ysr@1050: } else { ysr@1050: // HeapDumpPath specified a directory. We append a file separator ysr@1050: // (if needed). ysr@1050: os::closedir(dir); ysr@1050: size_t fs_len = strlen(os::file_separator()); ysr@1050: if (strlen(base_path) >= fs_len) { ysr@1050: char* end = base_path; ysr@1050: end += (strlen(base_path) - fs_len); ysr@1050: if (strcmp(end, os::file_separator()) != 0) { ysr@1050: strcat(base_path, os::file_separator()); ysr@1050: } duke@435: } duke@435: } duke@435: } ysr@1050: // If HeapDumpPath wasn't a file name then we append the default name ysr@1050: if (use_default_filename) { coleenp@2463: const size_t dlen = strlen(base_path); // if heap dump dir specified coleenp@2463: jio_snprintf(&base_path[dlen], sizeof(base_path)-dlen, "%s%d%s", coleenp@2463: dump_file_name, os::current_process_id(), dump_file_ext); ysr@1050: } coleenp@2463: const size_t len = strlen(base_path) + 1; zgu@3900: my_path = (char*)os::malloc(len, mtInternal); coleenp@2463: if (my_path == NULL) { coleenp@2463: warning("Cannot create heap dump file. Out of system memory."); coleenp@2463: return; coleenp@2463: } coleenp@2463: strncpy(my_path, base_path, len); ysr@1050: } else { ysr@1050: // Append a sequence number id for dumps following the first coleenp@2463: const size_t len = strlen(base_path) + max_digit_chars + 2; // for '.' and \0 zgu@3900: my_path = (char*)os::malloc(len, mtInternal); coleenp@2463: if (my_path == NULL) { coleenp@2463: warning("Cannot create heap dump file. Out of system memory."); coleenp@2463: return; coleenp@2463: } coleenp@2463: jio_snprintf(my_path, len, "%s.%d", base_path, dump_file_seq); duke@435: } ysr@1050: dump_file_seq++; // increment seq number for next time we dump duke@435: duke@435: HeapDumper dumper(false /* no GC before heap dump */, thurka@2130: true /* send to tty */, thurka@2130: oome /* pass along out-of-memory-error flag */); ysr@1050: dumper.dump(my_path); coleenp@2463: os::free(my_path); duke@435: }