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src/share/vm/classfile/javaClasses.cpp

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1422   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1423 }
1424 
1425 void java_lang_ThreadGroup::compute_offsets() {
1426   assert(_parent_offset == 0, "offsets should be initialized only once");
1427 
1428   Klass* k = SystemDictionary::ThreadGroup_klass();
1429 
1430   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1431   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1432   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1433   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1434   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1435   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1436   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1437   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1438   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1439   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1440 }
1441 








1442 oop java_lang_Throwable::unassigned_stacktrace() {
1443   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1444   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1445   if (UseCompressedOops) {
1446     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1447   } else {
1448     return oopDesc::load_decode_heap_oop((oop*)addr);
1449   }
1450 }
1451 
1452 oop java_lang_Throwable::backtrace(oop throwable) {
1453   return throwable->obj_field_acquire(backtrace_offset);
1454 }
1455 
1456 
1457 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1458   throwable->release_obj_field_put(backtrace_offset, value);
1459 }
1460 
1461 
1462 oop java_lang_Throwable::message(oop throwable) {
1463   return throwable->obj_field(detailMessage_offset);
1464 }
1465 
1466 
1467 oop java_lang_Throwable::message(Handle throwable) {
1468   return throwable->obj_field(detailMessage_offset);
1469 }
1470 
1471 
1472 // Return Symbol for detailed_message or NULL
1473 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1474   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1475   oop detailed_message = java_lang_Throwable::message(throwable);
1476   if (detailed_message != NULL) {
1477     return java_lang_String::as_symbol(detailed_message, THREAD);
1478   }
1479   return NULL;
1480 }
1481 
1482 void java_lang_Throwable::set_message(oop throwable, oop value) {
1483   throwable->obj_field_put(detailMessage_offset, value);
1484 }
1485 
1486 


1495 
1496 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1497   ResourceMark rm;
1498   Klass* k = throwable->klass();
1499   assert(k != NULL, "just checking");
1500   st->print("%s", k->external_name());
1501   oop msg = message(throwable);
1502   if (msg != NULL) {
1503     st->print(": %s", java_lang_String::as_utf8_string(msg));
1504   }
1505 }
1506 
1507 // After this many redefines, the stack trace is unreliable.
1508 const int MAX_VERSION = USHRT_MAX;
1509 
1510 static inline bool version_matches(Method* method, int version) {
1511   assert(version < MAX_VERSION, "version is too big");
1512   return method != NULL && (method->constants()->version() == version);
1513 }
1514 

1515 // This class provides a simple wrapper over the internal structure of
1516 // exception backtrace to insulate users of the backtrace from needing
1517 // to know what it looks like.
1518 class BacktraceBuilder: public StackObj {

1519  private:
1520   Handle          _backtrace;
1521   objArrayOop     _head;
1522   typeArrayOop    _methods;
1523   typeArrayOop    _bcis;
1524   objArrayOop     _mirrors;
1525   typeArrayOop    _cprefs; // needed to insulate method name against redefinition
1526   int             _index;
1527   NoSafepointVerifier _nsv;
1528 
1529  public:
1530 
1531   enum {
1532     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1533     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1534     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1535     trace_cprefs_offset  = java_lang_Throwable::trace_cprefs_offset,
1536     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1537     trace_size           = java_lang_Throwable::trace_size,
1538     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1539   };
1540 
1541   // get info out of chunks
1542   static typeArrayOop get_methods(objArrayHandle chunk) {
1543     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1544     assert(methods != NULL, "method array should be initialized in backtrace");
1545     return methods;
1546   }
1547   static typeArrayOop get_bcis(objArrayHandle chunk) {
1548     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1549     assert(bcis != NULL, "bci array should be initialized in backtrace");
1550     return bcis;
1551   }
1552   static objArrayOop get_mirrors(objArrayHandle chunk) {
1553     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1554     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1555     return mirrors;
1556   }
1557   static typeArrayOop get_cprefs(objArrayHandle chunk) {
1558     typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1559     assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1560     return cprefs;
1561   }
1562 


1563   // constructor for new backtrace
1564   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1565     expand(CHECK);
1566     _backtrace = _head;
1567     _index = 0;
1568   }
1569 
1570   BacktraceBuilder(objArrayHandle backtrace) {
1571     _methods = get_methods(backtrace);
1572     _bcis = get_bcis(backtrace);
1573     _mirrors = get_mirrors(backtrace);
1574     _cprefs = get_cprefs(backtrace);
1575     assert(_methods->length() == _bcis->length() &&
1576            _methods->length() == _mirrors->length(),
1577            "method and source information arrays should match");
1578 
1579     // head is the preallocated backtrace
1580     _backtrace = _head = backtrace();
1581     _index = 0;
1582   }


1628 
1629     if (_index >= trace_chunk_size) {
1630       methodHandle mhandle(THREAD, method);
1631       expand(CHECK);
1632       method = mhandle();
1633     }
1634 
1635     _methods->short_at_put(_index, method->orig_method_idnum());
1636     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1637     _cprefs->short_at_put(_index, method->name_index());
1638 
1639     // We need to save the mirrors in the backtrace to keep the class
1640     // from being unloaded while we still have this stack trace.
1641     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1642     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1643     _index++;
1644   }
1645 
1646 };
1647 

























































1648 // Print stack trace element to resource allocated buffer
1649 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1650                                   int method_id, int version, int bci, int cpref) {

1651 
1652   // Get strings and string lengths
1653   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1654   const char* klass_name  = holder->external_name();
1655   int buf_len = (int)strlen(klass_name);
1656 
1657   Method* method = holder->method_with_orig_idnum(method_id, version);
1658 
1659   // The method can be NULL if the requested class version is gone
1660   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1661   char* method_name = sym->as_C_string();
1662   buf_len += (int)strlen(method_name);
1663 
1664   char* source_file_name = NULL;
1665   Symbol* source = Backtrace::get_source_file_name(holder, version);
1666   if (source != NULL) {
1667     source_file_name = source->as_C_string();
1668     buf_len += (int)strlen(source_file_name);
1669   }
1670 


1681     if (line_number == -2) {
1682       strcat(buf, "(Native Method)");
1683     } else {
1684       if (source_file_name != NULL && (line_number != -1)) {
1685         // Sourcename and linenumber
1686         sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1687       } else if (source_file_name != NULL) {
1688         // Just sourcename
1689         sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1690       } else {
1691         // Neither sourcename nor linenumber
1692         sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1693       }
1694       nmethod* nm = method->code();
1695       if (WizardMode && nm != NULL) {
1696         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1697       }
1698     }
1699   }
1700 
1701   return buf;
1702 }
1703 
1704 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1705                                               int method_id, int version, int bci, int cpref) {
1706   ResourceMark rm;
1707   char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1708   st->print_cr("%s", buf);
1709 }
1710 

1711 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1712   Handle mirror = method->method_holder()->java_mirror();
1713   int method_id = method->orig_method_idnum();
1714   int version = method->constants()->version();
1715   int cpref = method->name_index();
1716   print_stack_element(st, mirror, method_id, version, bci, cpref);
1717 }
1718 
1719 const char* java_lang_Throwable::no_stack_trace_message() {
1720   return "\t<<no stack trace available>>";
1721 }
1722 
1723 /**
1724  * Print the throwable message and its stack trace plus all causes by walking the
1725  * cause chain.  The output looks the same as of Throwable.printStackTrace().
1726  */
1727 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1728   // First, print the message.
1729   print(throwable, st);
1730   st->cr();
1731 
1732   // Now print the stack trace.
1733   Thread* THREAD = Thread::current();
1734   while (throwable.not_null()) {
1735     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1736     if (result.is_null()) {
1737       st->print_raw_cr(no_stack_trace_message());
1738       return;
1739     }

1740 
1741     while (result.not_null()) {
1742       // Get method id, bci, version and mirror from chunk
1743       typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1744       typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1745       objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1746       typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1747 
1748       int length = methods()->length();
1749       for (int index = 0; index < length; index++) {
1750         Handle mirror(THREAD, mirrors->obj_at(index));
1751         // NULL mirror means end of stack trace
1752         if (mirror.is_null()) goto handle_cause;
1753         int method = methods->short_at(index);
1754         int version = Backtrace::version_at(bcis->int_at(index));
1755         int bci = Backtrace::bci_at(bcis->int_at(index));
1756         int cpref = cprefs->short_at(index);
1757         print_stack_element(st, mirror, method, version, bci, cpref);
1758       }
1759       result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1760     }
1761   handle_cause:
1762     {

1763       EXCEPTION_MARK;
1764       JavaValue cause(T_OBJECT);
1765       JavaCalls::call_virtual(&cause,
1766                               throwable,
1767                               KlassHandle(THREAD, throwable->klass()),
1768                               vmSymbols::getCause_name(),
1769                               vmSymbols::void_throwable_signature(),
1770                               THREAD);
1771       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1772       if (HAS_PENDING_EXCEPTION) {
1773         CLEAR_PENDING_EXCEPTION;
1774         throwable = Handle();
1775       } else {
1776         throwable = Handle(THREAD, (oop) cause.get_jobject());
1777         if (throwable.not_null()) {
1778           st->print("Caused by: ");
1779           print(throwable, st);
1780           st->cr();
1781         }
1782       }


1794                           throwable,
1795                           KlassHandle(THREAD, SystemDictionary::Throwable_klass()),
1796                           vmSymbols::printStackTrace_name(),
1797                           vmSymbols::void_method_signature(),
1798                           THREAD);
1799 }
1800 
1801 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1802   if (!StackTraceInThrowable) return;
1803   ResourceMark rm(THREAD);
1804 
1805   // Start out by clearing the backtrace for this object, in case the VM
1806   // runs out of memory while allocating the stack trace
1807   set_backtrace(throwable(), NULL);
1808   // Clear lazily constructed Java level stacktrace if refilling occurs
1809   // This is unnecessary in 1.7+ but harmless
1810   clear_stacktrace(throwable());
1811 
1812   int max_depth = MaxJavaStackTraceDepth;
1813   JavaThread* thread = (JavaThread*)THREAD;

1814   BacktraceBuilder bt(CHECK);
1815 
1816   // If there is no Java frame just return the method that was being called
1817   // with bci 0
1818   if (!thread->has_last_Java_frame()) {
1819     if (max_depth >= 1 && method() != NULL) {
1820       bt.push(method(), 0, CHECK);


1821       set_backtrace(throwable(), bt.backtrace());
1822     }
1823     return;
1824   }
1825 
1826   // Instead of using vframe directly, this version of fill_in_stack_trace
1827   // basically handles everything by hand. This significantly improved the
1828   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1829   // See bug 6333838 for  more details.
1830   // The "ASSERT" here is to verify this method generates the exactly same stack
1831   // trace as utilizing vframe.
1832 #ifdef ASSERT
1833   vframeStream st(thread);
1834   methodHandle st_method(THREAD, st.method());
1835 #endif
1836   int total_count = 0;
1837   RegisterMap map(thread, false);
1838   int decode_offset = 0;
1839   nmethod* nm = NULL;
1840   bool skip_fillInStackTrace_check = false;


1908     if (!skip_throwableInit_check) {
1909       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1910 
1911       // skip <init> methods of the exception class and superclasses
1912       // This is simlar to classic VM.
1913       if (method->name() == vmSymbols::object_initializer_name() &&
1914           throwable->is_a(method->method_holder())) {
1915         continue;
1916       } else {
1917         // there are none or we've seen them all - either way stop checking
1918         skip_throwableInit_check = true;
1919       }
1920     }
1921     if (method->is_hidden()) {
1922       if (skip_hidden)  continue;
1923     }
1924     bt.push(method, bci, CHECK);
1925     total_count++;
1926   }
1927 


1928   // Put completed stack trace into throwable object
1929   set_backtrace(throwable(), bt.backtrace());

1930 }
1931 
1932 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
1933   // No-op if stack trace is disabled
1934   if (!StackTraceInThrowable) {
1935     return;
1936   }
1937 
1938   // Disable stack traces for some preallocated out of memory errors
1939   if (!Universe::should_fill_in_stack_trace(throwable)) {
1940     return;
1941   }
1942 
1943   PRESERVE_EXCEPTION_MARK;
1944 
1945   JavaThread* thread = JavaThread::active();
1946   fill_in_stack_trace(throwable, method, thread);
1947   // ignore exceptions thrown during stack trace filling
1948   CLEAR_PENDING_EXCEPTION;
1949 }


1963 
1964   // No-op if stack trace is disabled
1965   if (!StackTraceInThrowable) return;
1966 
1967   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1968 
1969   JavaThread* THREAD = JavaThread::current();
1970 
1971   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1972   assert(backtrace.not_null(), "backtrace should have been preallocated");
1973 
1974   ResourceMark rm(THREAD);
1975   vframeStream st(THREAD);
1976 
1977   BacktraceBuilder bt(backtrace);
1978 
1979   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1980   // methods as preallocated errors aren't created by "java" code.
1981 
1982   // fill in as much stack trace as possible
1983   typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1984   int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1985   int chunk_count = 0;
1986 
1987   for (;!st.at_end(); st.next()) {
1988     bt.push(st.method(), st.bci(), CHECK);
1989     chunk_count++;
1990 
1991     // Bail-out for deep stacks
1992     if (chunk_count >= max_chunks) break;






1993   }
1994 
1995   // We support the Throwable immutability protocol defined for Java 7.
1996   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1997   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1998 }
1999 
2000 
2001 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
2002   if (throwable == NULL) {
2003     THROW_0(vmSymbols::java_lang_NullPointerException());
2004   }
2005   objArrayOop chunk = objArrayOop(backtrace(throwable));
2006   int depth = 0;
2007   if (chunk != NULL) {
2008     // Iterate over chunks and count full ones
2009     while (true) {
2010       objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
2011       if (next == NULL) break;
2012       depth += trace_chunk_size;
2013       chunk = next;
2014     }
2015     assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
2016     // Count element in remaining partial chunk.  NULL value for mirror
2017     // marks the end of the stack trace elements that are saved.
2018     objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
2019     assert(mirrors != NULL, "sanity check");
2020     for (int i = 0; i < mirrors->length(); i++) {
2021       if (mirrors->obj_at(i) == NULL) break;
2022       depth++;
2023     }
2024   }
2025   return depth;
2026 }
2027 


2028 
2029 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
2030   if (throwable == NULL) {
2031     THROW_0(vmSymbols::java_lang_NullPointerException());
2032   }
2033   if (index < 0) {
2034     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
2035   }
2036   // Compute how many chunks to skip and index into actual chunk
2037   objArrayOop chunk = objArrayOop(backtrace(throwable));
2038   int skip_chunks = index / trace_chunk_size;
2039   int chunk_index = index % trace_chunk_size;
2040   while (chunk != NULL && skip_chunks > 0) {
2041     chunk = objArrayOop(chunk->obj_at(trace_next_offset));
2042         skip_chunks--;
2043   }
2044   if (chunk == NULL) {
2045     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
2046   }
2047   // Get method id, bci, version, mirror and cpref from chunk
2048   typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
2049   typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
2050   objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
2051   typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
2052 
2053   assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");


2054 
2055   int method = methods->short_at(chunk_index);
2056   int version = Backtrace::version_at(bcis->int_at(chunk_index));
2057   int bci = Backtrace::bci_at(bcis->int_at(chunk_index));
2058   int cpref = cprefs->short_at(chunk_index);
2059   Handle mirror(THREAD, mirrors->obj_at(chunk_index));
2060 
2061   // Chunk can be partial full
2062   if (mirror.is_null()) {
2063     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);


2064   }
2065   oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
2066   return element;
2067 }
2068 
2069 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
2070                                         int version, int bci, int cpref, TRAPS) {
2071   // Allocate java.lang.StackTraceElement instance
2072   Klass* k = SystemDictionary::StackTraceElement_klass();
2073   assert(k != NULL, "must be loaded in 1.4+");
2074   instanceKlassHandle ik (THREAD, k);
2075   if (ik->should_be_initialized()) {
2076     ik->initialize(CHECK_0);
2077   }
2078 
2079   Handle element = ik->allocate_instance_handle(CHECK_0);
2080 











2081   // Fill in class name
2082   ResourceMark rm(THREAD);
2083   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2084   const char* str = holder->external_name();
2085   oop classname = StringTable::intern((char*) str, CHECK_0);
2086   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2087 
2088   Method* method = holder->method_with_orig_idnum(method_id, version);
2089 
2090   // The method can be NULL if the requested class version is gone
2091   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2092 
2093   // Fill in method name
2094   oop methodname = StringTable::intern(sym, CHECK_0);
2095   java_lang_StackTraceElement::set_methodName(element(), methodname);
2096 
2097   if (!version_matches(method, version)) {
2098     // The method was redefined, accurate line number information isn't available
2099     java_lang_StackTraceElement::set_fileName(element(), NULL);
2100     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2101   } else {
2102     // Fill in source file name and line number.
2103     Symbol* source = Backtrace::get_source_file_name(holder, version);
2104     if (ShowHiddenFrames && source == NULL)
2105       source = vmSymbols::unknown_class_name();
2106     oop filename = StringTable::intern(source, CHECK_0);
2107     java_lang_StackTraceElement::set_fileName(element(), filename);
2108 
2109     int line_number = Backtrace::get_line_number(method, bci);
2110     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2111   }
2112   return element();
2113 }
2114 
2115 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2116   Handle mirror (THREAD, method->method_holder()->java_mirror());
2117   int method_id = method->orig_method_idnum();
2118   int cpref = method->name_index();
2119   return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
2120 }
2121 
2122 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2123   if (MemberNameInStackFrame) {
2124     Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2125     Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2126     // we should expand MemberName::name when Throwable uses StackTrace
2127     // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2128     return method;
2129   } else {
2130     short mid       = stackFrame->short_field(_mid_offset);
2131     short version   = stackFrame->short_field(_version_offset);
2132     return holder->method_with_orig_idnum(mid, version);
2133   }
2134 }
2135 
2136 Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) {
2137   if (MemberNameInStackFrame) {
2138     return holder->source_file_name();
2139   } else {


3460   address addr = ik->static_field_addr(static_security_offset);
3461   if (UseCompressedOops) {
3462     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3463   } else {
3464     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3465   }
3466 }
3467 
3468 int java_lang_Class::_klass_offset;
3469 int java_lang_Class::_array_klass_offset;
3470 int java_lang_Class::_oop_size_offset;
3471 int java_lang_Class::_static_oop_field_count_offset;
3472 int java_lang_Class::_class_loader_offset;
3473 int java_lang_Class::_protection_domain_offset;
3474 int java_lang_Class::_component_mirror_offset;
3475 int java_lang_Class::_init_lock_offset;
3476 int java_lang_Class::_signers_offset;
3477 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3478 int java_lang_Throwable::backtrace_offset;
3479 int java_lang_Throwable::detailMessage_offset;
3480 int java_lang_Throwable::cause_offset;
3481 int java_lang_Throwable::stackTrace_offset;

3482 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3483 int java_lang_reflect_AccessibleObject::override_offset;
3484 int java_lang_reflect_Method::clazz_offset;
3485 int java_lang_reflect_Method::name_offset;
3486 int java_lang_reflect_Method::returnType_offset;
3487 int java_lang_reflect_Method::parameterTypes_offset;
3488 int java_lang_reflect_Method::exceptionTypes_offset;
3489 int java_lang_reflect_Method::slot_offset;
3490 int java_lang_reflect_Method::modifiers_offset;
3491 int java_lang_reflect_Method::signature_offset;
3492 int java_lang_reflect_Method::annotations_offset;
3493 int java_lang_reflect_Method::parameter_annotations_offset;
3494 int java_lang_reflect_Method::annotation_default_offset;
3495 int java_lang_reflect_Method::type_annotations_offset;
3496 int java_lang_reflect_Constructor::clazz_offset;
3497 int java_lang_reflect_Constructor::parameterTypes_offset;
3498 int java_lang_reflect_Constructor::exceptionTypes_offset;
3499 int java_lang_reflect_Constructor::slot_offset;
3500 int java_lang_reflect_Constructor::modifiers_offset;
3501 int java_lang_reflect_Constructor::signature_offset;


3662   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3663   compute_offset(_owner_offset, k,
3664                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3665 }
3666 
3667 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3668   assert(_owner_offset != 0, "Must be initialized");
3669   return obj->obj_field(_owner_offset);
3670 }
3671 
3672 // Compute hard-coded offsets
3673 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3674 // are not available to determine the offset_of_static_fields.
3675 void JavaClasses::compute_hard_coded_offsets() {
3676   const int x = heapOopSize;
3677   const int header = instanceOopDesc::base_offset_in_bytes();
3678 
3679   // Throwable Class
3680   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3681   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3682   java_lang_Throwable::cause_offset      = java_lang_Throwable::hc_cause_offset      * x + header;
3683   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3684   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3685 
3686   // java_lang_boxing_object
3687   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3688   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3689 
3690   // java_lang_ref_Reference:
3691   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3692   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3693   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3694   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3695   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3696   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3697   // Artificial fields for java_lang_ref_Reference
3698   // The first field is for the discovered field added in 1.4
3699   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3700 
3701   // java_lang_ref_SoftReference Class
3702   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);


3713   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3714 
3715   // java_lang_StackTraceElement
3716   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3717   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3718   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3719   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3720   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3721   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3722   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3723   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3724   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3725 
3726 }
3727 
3728 
3729 // Compute non-hard-coded field offsets of all the classes in this file
3730 void JavaClasses::compute_offsets() {
3731   // java_lang_Class::compute_offsets was called earlier in bootstrap
3732   java_lang_ClassLoader::compute_offsets();

3733   java_lang_Thread::compute_offsets();
3734   java_lang_ThreadGroup::compute_offsets();
3735   java_lang_invoke_MethodHandle::compute_offsets();
3736   java_lang_invoke_DirectMethodHandle::compute_offsets();
3737   java_lang_invoke_MemberName::compute_offsets();
3738   java_lang_invoke_LambdaForm::compute_offsets();
3739   java_lang_invoke_MethodType::compute_offsets();
3740   java_lang_invoke_CallSite::compute_offsets();
3741   java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3742   java_security_AccessControlContext::compute_offsets();
3743   // Initialize reflection classes. The layouts of these classes
3744   // changed with the new reflection implementation in JDK 1.4, and
3745   // since the Universe doesn't know what JDK version it is until this
3746   // point we defer computation of these offsets until now.
3747   java_lang_reflect_AccessibleObject::compute_offsets();
3748   java_lang_reflect_Method::compute_offsets();
3749   java_lang_reflect_Constructor::compute_offsets();
3750   java_lang_reflect_Field::compute_offsets();
3751   java_nio_Buffer::compute_offsets();
3752   sun_reflect_ConstantPool::compute_offsets();


3866   // java.lang.String
3867 
3868   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3869   if (java_lang_String::has_hash_field()) {
3870     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3871   }
3872   if (java_lang_String::has_coder_field()) {
3873     CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3874   }
3875 
3876   // java.lang.Class
3877 
3878   // Fake fields
3879   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3880   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3881 
3882   // java.lang.Throwable
3883 
3884   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3885   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3886   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3887   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");

3888 
3889   // Boxed primitive objects (java_lang_boxing_object)
3890 
3891   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3892   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3893   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3894   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3895   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3896   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3897   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3898   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3899 
3900   // java.lang.ClassLoader
3901 
3902   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
3903 
3904   // java.lang.System
3905 
3906   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3907   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");




1422   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1423 }
1424 
1425 void java_lang_ThreadGroup::compute_offsets() {
1426   assert(_parent_offset == 0, "offsets should be initialized only once");
1427 
1428   Klass* k = SystemDictionary::ThreadGroup_klass();
1429 
1430   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1431   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1432   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1433   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1434   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1435   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1436   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1437   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1438   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1439   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1440 }
1441 
1442 
1443 void java_lang_Throwable::compute_offsets() {
1444   Klass* k = SystemDictionary::Throwable_klass();
1445   Thread* THREAD = Thread::current();
1446   TempNewSymbol sym = SymbolTable::new_symbol("depth", CATCH);
1447   compute_offset(depth_offset, k, sym,  vmSymbols::int_signature());
1448 }
1449 
1450 oop java_lang_Throwable::unassigned_stacktrace() {
1451   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1452   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1453   if (UseCompressedOops) {
1454     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1455   } else {
1456     return oopDesc::load_decode_heap_oop((oop*)addr);
1457   }
1458 }
1459 
1460 oop java_lang_Throwable::backtrace(oop throwable) {
1461   return throwable->obj_field_acquire(backtrace_offset);
1462 }
1463 
1464 
1465 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1466   throwable->release_obj_field_put(backtrace_offset, value);
1467 }
1468 
1469 void java_lang_Throwable::set_depth(oop throwable, int value) {
1470   throwable->int_field_put(depth_offset, value);

1471 }
1472 

1473 oop java_lang_Throwable::message(Handle throwable) {
1474   return throwable->obj_field(detailMessage_offset);
1475 }
1476 
1477 
1478 // Return Symbol for detailed_message or NULL
1479 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1480   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1481   oop detailed_message = java_lang_Throwable::message(throwable);
1482   if (detailed_message != NULL) {
1483     return java_lang_String::as_symbol(detailed_message, THREAD);
1484   }
1485   return NULL;
1486 }
1487 
1488 void java_lang_Throwable::set_message(oop throwable, oop value) {
1489   throwable->obj_field_put(detailMessage_offset, value);
1490 }
1491 
1492 


1501 
1502 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1503   ResourceMark rm;
1504   Klass* k = throwable->klass();
1505   assert(k != NULL, "just checking");
1506   st->print("%s", k->external_name());
1507   oop msg = message(throwable);
1508   if (msg != NULL) {
1509     st->print(": %s", java_lang_String::as_utf8_string(msg));
1510   }
1511 }
1512 
1513 // After this many redefines, the stack trace is unreliable.
1514 const int MAX_VERSION = USHRT_MAX;
1515 
1516 static inline bool version_matches(Method* method, int version) {
1517   assert(version < MAX_VERSION, "version is too big");
1518   return method != NULL && (method->constants()->version() == version);
1519 }
1520 
1521 
1522 // This class provides a simple wrapper over the internal structure of
1523 // exception backtrace to insulate users of the backtrace from needing
1524 // to know what it looks like.
1525 class BacktraceBuilder: public StackObj {
1526  friend class BacktraceIterator;
1527  private:
1528   Handle          _backtrace;
1529   objArrayOop     _head;
1530   typeArrayOop    _methods;
1531   typeArrayOop    _bcis;
1532   objArrayOop     _mirrors;
1533   typeArrayOop    _cprefs; // needed to insulate method name against redefinition
1534   int             _index;
1535   NoSafepointVerifier _nsv;
1536 


1537   enum {
1538     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1539     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1540     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1541     trace_cprefs_offset  = java_lang_Throwable::trace_cprefs_offset,
1542     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1543     trace_size           = java_lang_Throwable::trace_size,
1544     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1545   };
1546 
1547   // get info out of chunks
1548   static typeArrayOop get_methods(objArrayHandle chunk) {
1549     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1550     assert(methods != NULL, "method array should be initialized in backtrace");
1551     return methods;
1552   }
1553   static typeArrayOop get_bcis(objArrayHandle chunk) {
1554     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1555     assert(bcis != NULL, "bci array should be initialized in backtrace");
1556     return bcis;
1557   }
1558   static objArrayOop get_mirrors(objArrayHandle chunk) {
1559     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1560     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1561     return mirrors;
1562   }
1563   static typeArrayOop get_cprefs(objArrayHandle chunk) {
1564     typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1565     assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1566     return cprefs;
1567   }
1568 
1569  public:
1570 
1571   // constructor for new backtrace
1572   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1573     expand(CHECK);
1574     _backtrace = _head;
1575     _index = 0;
1576   }
1577 
1578   BacktraceBuilder(objArrayHandle backtrace) {
1579     _methods = get_methods(backtrace);
1580     _bcis = get_bcis(backtrace);
1581     _mirrors = get_mirrors(backtrace);
1582     _cprefs = get_cprefs(backtrace);
1583     assert(_methods->length() == _bcis->length() &&
1584            _methods->length() == _mirrors->length(),
1585            "method and source information arrays should match");
1586 
1587     // head is the preallocated backtrace
1588     _backtrace = _head = backtrace();
1589     _index = 0;
1590   }


1636 
1637     if (_index >= trace_chunk_size) {
1638       methodHandle mhandle(THREAD, method);
1639       expand(CHECK);
1640       method = mhandle();
1641     }
1642 
1643     _methods->short_at_put(_index, method->orig_method_idnum());
1644     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1645     _cprefs->short_at_put(_index, method->name_index());
1646 
1647     // We need to save the mirrors in the backtrace to keep the class
1648     // from being unloaded while we still have this stack trace.
1649     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1650     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1651     _index++;
1652   }
1653 
1654 };
1655 
1656 struct BacktraceElement : public StackObj {
1657   int _method_id;
1658   int _bci;
1659   int _version;
1660   int _cpref;
1661   Handle _mirror;
1662   BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) :
1663                    _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {}
1664 };
1665 
1666 class BacktraceIterator : public StackObj {
1667   int _index;
1668   objArrayHandle  _result;
1669   objArrayHandle  _mirrors;
1670   typeArrayHandle _methods;
1671   typeArrayHandle _bcis;
1672   typeArrayHandle _cprefs;
1673   
1674   void init(objArrayHandle result, Thread* thread) {
1675     // Get method id, bci, version and mirror from chunk
1676     if (_result.not_null()) {
1677       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(result));
1678       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(result));
1679       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(result));
1680       _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(result));
1681       _index = 0;
1682     }
1683   }
1684  public:
1685   BacktraceIterator(objArrayHandle result, Thread* thread) {
1686     _result = result;
1687     init(result, thread);
1688     assert(_methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1689   }
1690 
1691   BacktraceElement next(Thread* thread) {
1692     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1693                         _methods->short_at(_index),
1694                         Backtrace::version_at(_bcis->int_at(_index)),
1695                         Backtrace::bci_at(_bcis->int_at(_index)),
1696                         _cprefs->short_at(_index));
1697     _index++;
1698 
1699     if (_index >= java_lang_Throwable::trace_chunk_size) {
1700       int next_offset = java_lang_Throwable::trace_next_offset;
1701       _result = objArrayHandle(thread, objArrayOop(_result->obj_at(next_offset)));
1702       init(_result, thread);
1703     }
1704     return e;
1705   }
1706 
1707   bool repeat() {
1708     return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1709   }
1710 };
1711 
1712 
1713 // Print stack trace element to resource allocated buffer
1714 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1715                                           int version, int bci, int cpref) {
1716   ResourceMark rm;
1717 
1718   // Get strings and string lengths
1719   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1720   const char* klass_name  = holder->external_name();
1721   int buf_len = (int)strlen(klass_name);
1722 
1723   Method* method = holder->method_with_orig_idnum(method_id, version);
1724 
1725   // The method can be NULL if the requested class version is gone
1726   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1727   char* method_name = sym->as_C_string();
1728   buf_len += (int)strlen(method_name);
1729 
1730   char* source_file_name = NULL;
1731   Symbol* source = Backtrace::get_source_file_name(holder, version);
1732   if (source != NULL) {
1733     source_file_name = source->as_C_string();
1734     buf_len += (int)strlen(source_file_name);
1735   }
1736 


1747     if (line_number == -2) {
1748       strcat(buf, "(Native Method)");
1749     } else {
1750       if (source_file_name != NULL && (line_number != -1)) {
1751         // Sourcename and linenumber
1752         sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1753       } else if (source_file_name != NULL) {
1754         // Just sourcename
1755         sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1756       } else {
1757         // Neither sourcename nor linenumber
1758         sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1759       }
1760       nmethod* nm = method->code();
1761       if (WizardMode && nm != NULL) {
1762         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1763       }
1764     }
1765   }
1766 







1767   st->print_cr("%s", buf);
1768 }
1769 
1770 
1771 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1772   Handle mirror = method->method_holder()->java_mirror();
1773   int method_id = method->orig_method_idnum();
1774   int version = method->constants()->version();
1775   int cpref = method->name_index();
1776   print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref);




1777 }
1778 
1779 /**
1780  * Print the throwable message and its stack trace plus all causes by walking the
1781  * cause chain.  The output looks the same as of Throwable.printStackTrace().
1782  */
1783 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1784   // First, print the message.
1785   print(throwable, st);
1786   st->cr();
1787 
1788   // Now print the stack trace.
1789   Thread* THREAD = Thread::current();
1790   while (throwable.not_null()) {
1791     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1792     if (result.is_null()) {
1793       st->print_raw_cr("\t<<no stack trace available>>");
1794       return;
1795     }
1796     BacktraceIterator iter(result, THREAD);
1797 
1798     while (iter.repeat()) {
1799       BacktraceElement bte = iter.next(THREAD);
1800       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref);
















1801     }

1802     {
1803       // Call getCause() which doesn't necessarily return the _cause field.
1804       EXCEPTION_MARK;
1805       JavaValue cause(T_OBJECT);
1806       JavaCalls::call_virtual(&cause,
1807                               throwable,
1808                               KlassHandle(THREAD, throwable->klass()),
1809                               vmSymbols::getCause_name(),
1810                               vmSymbols::void_throwable_signature(),
1811                               THREAD);
1812       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1813       if (HAS_PENDING_EXCEPTION) {
1814         CLEAR_PENDING_EXCEPTION;
1815         throwable = Handle();
1816       } else {
1817         throwable = Handle(THREAD, (oop) cause.get_jobject());
1818         if (throwable.not_null()) {
1819           st->print("Caused by: ");
1820           print(throwable, st);
1821           st->cr();
1822         }
1823       }


1835                           throwable,
1836                           KlassHandle(THREAD, SystemDictionary::Throwable_klass()),
1837                           vmSymbols::printStackTrace_name(),
1838                           vmSymbols::void_method_signature(),
1839                           THREAD);
1840 }
1841 
1842 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1843   if (!StackTraceInThrowable) return;
1844   ResourceMark rm(THREAD);
1845 
1846   // Start out by clearing the backtrace for this object, in case the VM
1847   // runs out of memory while allocating the stack trace
1848   set_backtrace(throwable(), NULL);
1849   // Clear lazily constructed Java level stacktrace if refilling occurs
1850   // This is unnecessary in 1.7+ but harmless
1851   clear_stacktrace(throwable());
1852 
1853   int max_depth = MaxJavaStackTraceDepth;
1854   JavaThread* thread = (JavaThread*)THREAD;
1855 
1856   BacktraceBuilder bt(CHECK);
1857 
1858   // If there is no Java frame just return the method that was being called
1859   // with bci 0
1860   if (!thread->has_last_Java_frame()) {
1861     if (max_depth >= 1 && method() != NULL) {
1862       bt.push(method(), 0, CHECK);
1863       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1864       set_depth(throwable(), 1);
1865       set_backtrace(throwable(), bt.backtrace());
1866     }
1867     return;
1868   }
1869 
1870   // Instead of using vframe directly, this version of fill_in_stack_trace
1871   // basically handles everything by hand. This significantly improved the
1872   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1873   // See bug 6333838 for  more details.
1874   // The "ASSERT" here is to verify this method generates the exactly same stack
1875   // trace as utilizing vframe.
1876 #ifdef ASSERT
1877   vframeStream st(thread);
1878   methodHandle st_method(THREAD, st.method());
1879 #endif
1880   int total_count = 0;
1881   RegisterMap map(thread, false);
1882   int decode_offset = 0;
1883   nmethod* nm = NULL;
1884   bool skip_fillInStackTrace_check = false;


1952     if (!skip_throwableInit_check) {
1953       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1954 
1955       // skip <init> methods of the exception class and superclasses
1956       // This is simlar to classic VM.
1957       if (method->name() == vmSymbols::object_initializer_name() &&
1958           throwable->is_a(method->method_holder())) {
1959         continue;
1960       } else {
1961         // there are none or we've seen them all - either way stop checking
1962         skip_throwableInit_check = true;
1963       }
1964     }
1965     if (method->is_hidden()) {
1966       if (skip_hidden)  continue;
1967     }
1968     bt.push(method, bci, CHECK);
1969     total_count++;
1970   }
1971 
1972   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
1973 
1974   // Put completed stack trace into throwable object
1975   set_backtrace(throwable(), bt.backtrace());
1976   set_depth(throwable(), total_count);
1977 }
1978 
1979 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
1980   // No-op if stack trace is disabled
1981   if (!StackTraceInThrowable) {
1982     return;
1983   }
1984 
1985   // Disable stack traces for some preallocated out of memory errors
1986   if (!Universe::should_fill_in_stack_trace(throwable)) {
1987     return;
1988   }
1989 
1990   PRESERVE_EXCEPTION_MARK;
1991 
1992   JavaThread* thread = JavaThread::active();
1993   fill_in_stack_trace(throwable, method, thread);
1994   // ignore exceptions thrown during stack trace filling
1995   CLEAR_PENDING_EXCEPTION;
1996 }


2010 
2011   // No-op if stack trace is disabled
2012   if (!StackTraceInThrowable) return;
2013 
2014   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2015 
2016   JavaThread* THREAD = JavaThread::current();
2017 
2018   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2019   assert(backtrace.not_null(), "backtrace should have been preallocated");
2020 
2021   ResourceMark rm(THREAD);
2022   vframeStream st(THREAD);
2023 
2024   BacktraceBuilder bt(backtrace);
2025 
2026   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2027   // methods as preallocated errors aren't created by "java" code.
2028 
2029   // fill in as much stack trace as possible


2030   int chunk_count = 0;

2031   for (;!st.at_end(); st.next()) {
2032     bt.push(st.method(), st.bci(), CHECK);
2033     chunk_count++;
2034 
2035     // Bail-out for deep stacks
2036     if (chunk_count >= trace_chunk_size) break;
2037   }
2038   set_depth(throwable(), chunk_count);
2039 
2040   {
2041     ResourceMark rm;
2042     log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2043   }
2044 
2045   // We support the Throwable immutability protocol defined for Java 7.
2046   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2047   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2048 }
2049 
2050 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2051                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2052   if (throwable == NULL) {
2053     THROW(vmSymbols::java_lang_NullPointerException());



















2054   }



2055 
2056   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2057   BacktraceIterator iter(result, THREAD);
2058 
2059   int index = 0;
2060   while (iter.repeat()) {
2061     BacktraceElement bte = iter.next(THREAD);
2062     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));



















2063 
2064     if (stack_trace_element.is_null()) {
2065       THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2066     }
2067 
2068     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2069     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));



2070 
2071     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2072                                          method,
2073                                          bte._version, 
2074                                          bte._bci, 
2075                                          bte._cpref, CHECK);
2076   }


2077 }
2078 
2079 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {

2080   // Allocate java.lang.StackTraceElement instance
2081   Klass* k = SystemDictionary::StackTraceElement_klass();
2082   assert(k != NULL, "must be loaded in 1.4+");
2083   instanceKlassHandle ik (THREAD, k);
2084   if (ik->should_be_initialized()) {
2085     ik->initialize(CHECK_0);
2086   }
2087 
2088   Handle element = ik->allocate_instance_handle(CHECK_0);
2089 
2090   int cpref = method->name_index();
2091   int version = method->constants()->version();
2092   fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0);
2093   return element();
2094 }
2095 
2096 void java_lang_StackTraceElement::fill_in(Handle element,
2097                                           InstanceKlass* holder, const methodHandle& method,
2098                                           int version, int bci, int cpref, TRAPS) {
2099   assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2100 
2101   // Fill in class name
2102   ResourceMark rm(THREAD);

2103   const char* str = holder->external_name();
2104   oop classname = StringTable::intern((char*) str, CHECK);
2105   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2106 


2107   // The method can be NULL if the requested class version is gone
2108   Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref);
2109 
2110   // Fill in method name
2111   oop methodname = StringTable::intern(sym, CHECK);
2112   java_lang_StackTraceElement::set_methodName(element(), methodname);
2113 
2114   if (!version_matches(method(), version)) {
2115     // The method was redefined, accurate line number information isn't available
2116     java_lang_StackTraceElement::set_fileName(element(), NULL);
2117     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2118   } else {
2119     // Fill in source file name and line number.
2120     Symbol* source = Backtrace::get_source_file_name(holder, version);
2121     if (ShowHiddenFrames && source == NULL)
2122       source = vmSymbols::unknown_class_name();
2123     oop filename = StringTable::intern(source, CHECK);
2124     java_lang_StackTraceElement::set_fileName(element(), filename);
2125 
2126     int line_number = Backtrace::get_line_number(method, bci);
2127     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2128   }








2129 }
2130 
2131 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2132   if (MemberNameInStackFrame) {
2133     Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2134     Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2135     // we should expand MemberName::name when Throwable uses StackTrace
2136     // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2137     return method;
2138   } else {
2139     short mid       = stackFrame->short_field(_mid_offset);
2140     short version   = stackFrame->short_field(_version_offset);
2141     return holder->method_with_orig_idnum(mid, version);
2142   }
2143 }
2144 
2145 Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) {
2146   if (MemberNameInStackFrame) {
2147     return holder->source_file_name();
2148   } else {


3469   address addr = ik->static_field_addr(static_security_offset);
3470   if (UseCompressedOops) {
3471     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3472   } else {
3473     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3474   }
3475 }
3476 
3477 int java_lang_Class::_klass_offset;
3478 int java_lang_Class::_array_klass_offset;
3479 int java_lang_Class::_oop_size_offset;
3480 int java_lang_Class::_static_oop_field_count_offset;
3481 int java_lang_Class::_class_loader_offset;
3482 int java_lang_Class::_protection_domain_offset;
3483 int java_lang_Class::_component_mirror_offset;
3484 int java_lang_Class::_init_lock_offset;
3485 int java_lang_Class::_signers_offset;
3486 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3487 int java_lang_Throwable::backtrace_offset;
3488 int java_lang_Throwable::detailMessage_offset;

3489 int java_lang_Throwable::stackTrace_offset;
3490 int java_lang_Throwable::depth_offset;
3491 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3492 int java_lang_reflect_AccessibleObject::override_offset;
3493 int java_lang_reflect_Method::clazz_offset;
3494 int java_lang_reflect_Method::name_offset;
3495 int java_lang_reflect_Method::returnType_offset;
3496 int java_lang_reflect_Method::parameterTypes_offset;
3497 int java_lang_reflect_Method::exceptionTypes_offset;
3498 int java_lang_reflect_Method::slot_offset;
3499 int java_lang_reflect_Method::modifiers_offset;
3500 int java_lang_reflect_Method::signature_offset;
3501 int java_lang_reflect_Method::annotations_offset;
3502 int java_lang_reflect_Method::parameter_annotations_offset;
3503 int java_lang_reflect_Method::annotation_default_offset;
3504 int java_lang_reflect_Method::type_annotations_offset;
3505 int java_lang_reflect_Constructor::clazz_offset;
3506 int java_lang_reflect_Constructor::parameterTypes_offset;
3507 int java_lang_reflect_Constructor::exceptionTypes_offset;
3508 int java_lang_reflect_Constructor::slot_offset;
3509 int java_lang_reflect_Constructor::modifiers_offset;
3510 int java_lang_reflect_Constructor::signature_offset;


3671   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3672   compute_offset(_owner_offset, k,
3673                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3674 }
3675 
3676 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3677   assert(_owner_offset != 0, "Must be initialized");
3678   return obj->obj_field(_owner_offset);
3679 }
3680 
3681 // Compute hard-coded offsets
3682 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3683 // are not available to determine the offset_of_static_fields.
3684 void JavaClasses::compute_hard_coded_offsets() {
3685   const int x = heapOopSize;
3686   const int header = instanceOopDesc::base_offset_in_bytes();
3687 
3688   // Throwable Class
3689   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3690   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;

3691   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3692   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3693 
3694   // java_lang_boxing_object
3695   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3696   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3697 
3698   // java_lang_ref_Reference:
3699   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3700   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3701   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3702   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3703   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3704   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3705   // Artificial fields for java_lang_ref_Reference
3706   // The first field is for the discovered field added in 1.4
3707   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3708 
3709   // java_lang_ref_SoftReference Class
3710   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);


3721   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3722 
3723   // java_lang_StackTraceElement
3724   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3725   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3726   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3727   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3728   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3729   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3730   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3731   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3732   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3733 
3734 }
3735 
3736 
3737 // Compute non-hard-coded field offsets of all the classes in this file
3738 void JavaClasses::compute_offsets() {
3739   // java_lang_Class::compute_offsets was called earlier in bootstrap
3740   java_lang_ClassLoader::compute_offsets();
3741   java_lang_Throwable::compute_offsets();
3742   java_lang_Thread::compute_offsets();
3743   java_lang_ThreadGroup::compute_offsets();
3744   java_lang_invoke_MethodHandle::compute_offsets();
3745   java_lang_invoke_DirectMethodHandle::compute_offsets();
3746   java_lang_invoke_MemberName::compute_offsets();
3747   java_lang_invoke_LambdaForm::compute_offsets();
3748   java_lang_invoke_MethodType::compute_offsets();
3749   java_lang_invoke_CallSite::compute_offsets();
3750   java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3751   java_security_AccessControlContext::compute_offsets();
3752   // Initialize reflection classes. The layouts of these classes
3753   // changed with the new reflection implementation in JDK 1.4, and
3754   // since the Universe doesn't know what JDK version it is until this
3755   // point we defer computation of these offsets until now.
3756   java_lang_reflect_AccessibleObject::compute_offsets();
3757   java_lang_reflect_Method::compute_offsets();
3758   java_lang_reflect_Constructor::compute_offsets();
3759   java_lang_reflect_Field::compute_offsets();
3760   java_nio_Buffer::compute_offsets();
3761   sun_reflect_ConstantPool::compute_offsets();


3875   // java.lang.String
3876 
3877   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B");
3878   if (java_lang_String::has_hash_field()) {
3879     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3880   }
3881   if (java_lang_String::has_coder_field()) {
3882     CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B");
3883   }
3884 
3885   // java.lang.Class
3886 
3887   // Fake fields
3888   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3889   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3890 
3891   // java.lang.Throwable
3892 
3893   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3894   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");

3895   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3896   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I");
3897 
3898   // Boxed primitive objects (java_lang_boxing_object)
3899 
3900   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3901   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3902   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3903   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3904   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3905   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3906   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3907   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3908 
3909   // java.lang.ClassLoader
3910 
3911   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
3912 
3913   // java.lang.System
3914 
3915   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3916   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");


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