changeset 3035:2b3acb34791f

Merge
author dcubed
date Fri, 06 Jan 2012 16:18:29 -0800
parents 2ee4167627a3 66259eca2bf7
children 22cee0ee8927
files src/os/windows/vm/os_windows.cpp src/share/vm/classfile/classFileParser.cpp src/share/vm/runtime/os.hpp
diffstat 21 files changed, 412 insertions(+), 111 deletions(-) [+]
line wrap: on
line diff
--- a/src/cpu/x86/vm/vm_version_x86.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/cpu/x86/vm/vm_version_x86.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -50,7 +50,7 @@
 VM_Version::CpuidInfo VM_Version::_cpuid_info   = { 0, };
 
 static BufferBlob* stub_blob;
-static const int stub_size = 400;
+static const int stub_size = 500;
 
 extern "C" {
   typedef void (*getPsrInfo_stub_t)(void*);
@@ -73,7 +73,7 @@
     const uint32_t CPU_FAMILY_486   = (4 << CPU_FAMILY_SHIFT);
 
     Label detect_486, cpu486, detect_586, std_cpuid1, std_cpuid4;
-    Label ext_cpuid1, ext_cpuid5, done;
+    Label ext_cpuid1, ext_cpuid5, ext_cpuid7, done;
 
     StubCodeMark mark(this, "VM_Version", "getPsrInfo_stub");
 #   define __ _masm->
@@ -235,8 +235,10 @@
     __ jcc(Assembler::belowEqual, done);
     __ cmpl(rax, 0x80000004);     // Is cpuid(0x80000005) supported?
     __ jccb(Assembler::belowEqual, ext_cpuid1);
+    __ cmpl(rax, 0x80000006);     // Is cpuid(0x80000007) supported?
+    __ jccb(Assembler::belowEqual, ext_cpuid5);
     __ cmpl(rax, 0x80000007);     // Is cpuid(0x80000008) supported?
-    __ jccb(Assembler::belowEqual, ext_cpuid5);
+    __ jccb(Assembler::belowEqual, ext_cpuid7);
     //
     // Extended cpuid(0x80000008)
     //
@@ -249,6 +251,18 @@
     __ movl(Address(rsi,12), rdx);
 
     //
+    // Extended cpuid(0x80000007)
+    //
+    __ bind(ext_cpuid7);
+    __ movl(rax, 0x80000007);
+    __ cpuid();
+    __ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid7_offset())));
+    __ movl(Address(rsi, 0), rax);
+    __ movl(Address(rsi, 4), rbx);
+    __ movl(Address(rsi, 8), rcx);
+    __ movl(Address(rsi,12), rdx);
+
+    //
     // Extended cpuid(0x80000005)
     //
     __ bind(ext_cpuid5);
@@ -365,7 +379,7 @@
   }
 
   char buf[256];
-  jio_snprintf(buf, sizeof(buf), "(%u cores per cpu, %u threads per core) family %d model %d stepping %d%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+  jio_snprintf(buf, sizeof(buf), "(%u cores per cpu, %u threads per core) family %d model %d stepping %d%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
                cores_per_cpu(), threads_per_core(),
                cpu_family(), _model, _stepping,
                (supports_cmov() ? ", cmov" : ""),
@@ -383,7 +397,10 @@
                (supports_3dnow_prefetch() ? ", 3dnowpref" : ""),
                (supports_lzcnt()   ? ", lzcnt": ""),
                (supports_sse4a()   ? ", sse4a": ""),
-               (supports_ht() ? ", ht": ""));
+               (supports_ht() ? ", ht": ""),
+               (supports_tsc() ? ", tsc": ""),
+               (supports_tscinv_bit() ? ", tscinvbit": ""),
+               (supports_tscinv() ? ", tscinv": ""));
   _features_str = strdup(buf);
 
   // UseSSE is set to the smaller of what hardware supports and what
--- a/src/cpu/x86/vm/vm_version_x86.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/cpu/x86/vm/vm_version_x86.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -176,32 +176,54 @@
     } bits;
   };
 
+  union ExtCpuid7Edx {
+    uint32_t value;
+    struct {
+      uint32_t               : 8,
+              tsc_invariance : 1,
+                             : 23;
+    } bits;
+  };
+
 protected:
-   static int _cpu;
-   static int _model;
-   static int _stepping;
-   static int _cpuFeatures;     // features returned by the "cpuid" instruction
-                                // 0 if this instruction is not available
-   static const char* _features_str;
+  static int _cpu;
+  static int _model;
+  static int _stepping;
+  static int _cpuFeatures;     // features returned by the "cpuid" instruction
+                               // 0 if this instruction is not available
+  static const char* _features_str;
 
-   enum {
-     CPU_CX8    = (1 << 0), // next bits are from cpuid 1 (EDX)
-     CPU_CMOV   = (1 << 1),
-     CPU_FXSR   = (1 << 2),
-     CPU_HT     = (1 << 3),
-     CPU_MMX    = (1 << 4),
-     CPU_3DNOW_PREFETCH  = (1 << 5), // Processor supports 3dnow prefetch and prefetchw instructions
-                                     // may not necessarily support other 3dnow instructions
-     CPU_SSE    = (1 << 6),
-     CPU_SSE2   = (1 << 7),
-     CPU_SSE3   = (1 << 8), // SSE3 comes from cpuid 1 (ECX)
-     CPU_SSSE3  = (1 << 9),
-     CPU_SSE4A  = (1 << 10),
-     CPU_SSE4_1 = (1 << 11),
-     CPU_SSE4_2 = (1 << 12),
-     CPU_POPCNT = (1 << 13),
-     CPU_LZCNT  = (1 << 14)
-   } cpuFeatureFlags;
+  enum {
+    CPU_CX8    = (1 << 0), // next bits are from cpuid 1 (EDX)
+    CPU_CMOV   = (1 << 1),
+    CPU_FXSR   = (1 << 2),
+    CPU_HT     = (1 << 3),
+    CPU_MMX    = (1 << 4),
+    CPU_3DNOW_PREFETCH  = (1 << 5), // Processor supports 3dnow prefetch and prefetchw instructions
+                                    // may not necessarily support other 3dnow instructions
+    CPU_SSE    = (1 << 6),
+    CPU_SSE2   = (1 << 7),
+    CPU_SSE3   = (1 << 8), // SSE3 comes from cpuid 1 (ECX)
+    CPU_SSSE3  = (1 << 9),
+    CPU_SSE4A  = (1 << 10),
+    CPU_SSE4_1 = (1 << 11),
+    CPU_SSE4_2 = (1 << 12),
+    CPU_POPCNT = (1 << 13),
+    CPU_LZCNT  = (1 << 14),
+    CPU_TSC    = (1 << 15),
+    CPU_TSCINV = (1 << 16)
+  } cpuFeatureFlags;
+
+  enum {
+    // AMD
+    CPU_FAMILY_AMD_11H       = 17,
+    // Intel
+    CPU_FAMILY_INTEL_CORE    = 6,
+    CPU_MODEL_NEHALEM_EP     = 26,
+    CPU_MODEL_WESTMERE_EP    = 44,
+//  CPU_MODEL_IVYBRIDGE_EP   = ??, TODO - get real value
+    CPU_MODEL_SANDYBRIDGE_EP = 45
+  } cpuExtendedFamily;
 
   // cpuid information block.  All info derived from executing cpuid with
   // various function numbers is stored here.  Intel and AMD info is
@@ -270,6 +292,12 @@
     ExtCpuid5Ex  ext_cpuid5_ecx; // L1 data cache info (AMD)
     ExtCpuid5Ex  ext_cpuid5_edx; // L1 instruction cache info (AMD)
 
+    // cpuid function 0x80000007
+    uint32_t     ext_cpuid7_eax; // reserved
+    uint32_t     ext_cpuid7_ebx; // reserved
+    uint32_t     ext_cpuid7_ecx; // reserved
+    ExtCpuid7Edx ext_cpuid7_edx; // tscinv
+
     // cpuid function 0x80000008
     uint32_t     ext_cpuid8_eax; // unused currently
     uint32_t     ext_cpuid8_ebx; // reserved
@@ -286,19 +314,23 @@
     result += _cpuid_info.std_cpuid1_eax.bits.ext_family;
     return result;
   }
+
   static uint32_t extended_cpu_model() {
     uint32_t result = _cpuid_info.std_cpuid1_eax.bits.model;
     result |= _cpuid_info.std_cpuid1_eax.bits.ext_model << 4;
     return result;
   }
+
   static uint32_t cpu_stepping() {
     uint32_t result = _cpuid_info.std_cpuid1_eax.bits.stepping;
     return result;
   }
+
   static uint logical_processor_count() {
     uint result = threads_per_core();
     return result;
   }
+
   static uint32_t feature_flags() {
     uint32_t result = 0;
     if (_cpuid_info.std_cpuid1_edx.bits.cmpxchg8 != 0)
@@ -328,6 +360,10 @@
       result |= CPU_SSE4_2;
     if (_cpuid_info.std_cpuid1_ecx.bits.popcnt != 0)
       result |= CPU_POPCNT;
+    if (_cpuid_info.std_cpuid1_edx.bits.tsc != 0)
+      result |= CPU_TSC;
+    if (_cpuid_info.ext_cpuid7_edx.bits.tsc_invariance != 0)
+      result |= CPU_TSCINV;
 
     // AMD features.
     if (is_amd()) {
@@ -352,6 +388,7 @@
   static ByteSize dcp_cpuid4_offset() { return byte_offset_of(CpuidInfo, dcp_cpuid4_eax); }
   static ByteSize ext_cpuid1_offset() { return byte_offset_of(CpuidInfo, ext_cpuid1_eax); }
   static ByteSize ext_cpuid5_offset() { return byte_offset_of(CpuidInfo, ext_cpuid5_eax); }
+  static ByteSize ext_cpuid7_offset() { return byte_offset_of(CpuidInfo, ext_cpuid7_eax); }
   static ByteSize ext_cpuid8_offset() { return byte_offset_of(CpuidInfo, ext_cpuid8_eax); }
   static ByteSize tpl_cpuidB0_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB0_eax); }
   static ByteSize tpl_cpuidB1_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB1_eax); }
@@ -382,7 +419,6 @@
   //
   static int  cpu_family()        { return _cpu;}
   static bool is_P6()             { return cpu_family() >= 6; }
-
   static bool is_amd()            { assert_is_initialized(); return _cpuid_info.std_vendor_name_0 == 0x68747541; } // 'htuA'
   static bool is_intel()          { assert_is_initialized(); return _cpuid_info.std_vendor_name_0 == 0x756e6547; } // 'uneG'
 
@@ -447,14 +483,49 @@
   static bool supports_sse4_1()   { return (_cpuFeatures & CPU_SSE4_1) != 0; }
   static bool supports_sse4_2()   { return (_cpuFeatures & CPU_SSE4_2) != 0; }
   static bool supports_popcnt()   { return (_cpuFeatures & CPU_POPCNT) != 0; }
-  //
+  static bool supports_tsc()      { return (_cpuFeatures & CPU_TSC)    != 0; }
+
+  // Intel features
+  static bool is_intel_family_core() { return is_intel() &&
+                                       extended_cpu_family() == CPU_FAMILY_INTEL_CORE; }
+
+  static bool is_intel_tsc_synched_at_init()  {
+    if (is_intel_family_core()) {
+      uint32_t ext_model = extended_cpu_model();
+      if (ext_model == CPU_MODEL_NEHALEM_EP   ||
+          ext_model == CPU_MODEL_WESTMERE_EP  ||
+// TODO   ext_model == CPU_MODEL_IVYBRIDGE_EP ||
+          ext_model == CPU_MODEL_SANDYBRIDGE_EP) {
+        // 2-socket invtsc support. EX versions with 4 sockets are not
+        // guaranteed to synchronize tscs at initialization via a double
+        // handshake. The tscs can be explicitly set in software.  Code
+        // that uses tsc values must be prepared for them to arbitrarily
+        // jump backward or forward.
+        return true;
+      }
+    }
+    return false;
+  }
+
   // AMD features
-  //
   static bool supports_3dnow_prefetch()    { return (_cpuFeatures & CPU_3DNOW_PREFETCH) != 0; }
   static bool supports_mmx_ext()  { return is_amd() && _cpuid_info.ext_cpuid1_edx.bits.mmx_amd != 0; }
   static bool supports_lzcnt()    { return (_cpuFeatures & CPU_LZCNT) != 0; }
   static bool supports_sse4a()    { return (_cpuFeatures & CPU_SSE4A) != 0; }
 
+  static bool is_amd_Barcelona()  { return is_amd() &&
+                                           extended_cpu_family() == CPU_FAMILY_AMD_11H; }
+
+  // Intel and AMD newer cores support fast timestamps well
+  static bool supports_tscinv_bit() {
+    return (_cpuFeatures & CPU_TSCINV) != 0;
+  }
+  static bool supports_tscinv() {
+    return supports_tscinv_bit() &&
+           ( (is_amd() && !is_amd_Barcelona()) ||
+             is_intel_tsc_synched_at_init() );
+  }
+
   // Intel Core and newer cpus have fast IDIV instruction (excluding Atom).
   static bool has_fast_idiv()     { return is_intel() && cpu_family() == 6 &&
                                            supports_sse3() && _model != 0x1C; }
--- a/src/os/posix/vm/os_posix.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os/posix/vm/os_posix.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -59,6 +59,10 @@
   VMError::report_coredump_status(buffer, success);
 }
 
+int os::get_last_error() {
+  return errno;
+}
+
 bool os::is_debugger_attached() {
   // not implemented
   return false;
--- a/src/os/windows/vm/os_windows.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os/windows/vm/os_windows.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -132,7 +132,6 @@
 // save DLL module handle, used by GetModuleFileName
 
 HINSTANCE vm_lib_handle;
-static int getLastErrorString(char *buf, size_t len);
 
 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
   switch (reason) {
@@ -1452,7 +1451,7 @@
     return result;
   }
 
-  long errcode = GetLastError();
+  DWORD errcode = GetLastError();
   if (errcode == ERROR_MOD_NOT_FOUND) {
     strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
     ebuf[ebuflen-1]='\0';
@@ -1463,11 +1462,11 @@
   // If we can read dll-info and find that dll was built
   // for an architecture other than Hotspot is running in
   // - then print to buffer "DLL was built for a different architecture"
-  // else call getLastErrorString to obtain system error message
+  // else call os::lasterror to obtain system error message
 
   // Read system error message into ebuf
   // It may or may not be overwritten below (in the for loop and just above)
-  getLastErrorString(ebuf, (size_t) ebuflen);
+  lasterror(ebuf, (size_t) ebuflen);
   ebuf[ebuflen-1]='\0';
   int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0);
   if (file_descriptor<0)
@@ -1500,7 +1499,7 @@
   ::close(file_descriptor);
   if (failed_to_get_lib_arch)
   {
-    // file i/o error - report getLastErrorString(...) msg
+    // file i/o error - report os::lasterror(...) msg
     return NULL;
   }
 
@@ -1543,7 +1542,7 @@
     "Didn't find runing architecture code in arch_array");
 
   // If the architure is right
-  // but some other error took place - report getLastErrorString(...) msg
+  // but some other error took place - report os::lasterror(...) msg
   if (lib_arch == running_arch)
   {
     return NULL;
@@ -1775,12 +1774,12 @@
 // This method is a copy of JDK's sysGetLastErrorString
 // from src/windows/hpi/src/system_md.c
 
-size_t os::lasterror(char *buf, size_t len) {
-  long errval;
+size_t os::lasterror(char* buf, size_t len) {
+  DWORD errval;
 
   if ((errval = GetLastError()) != 0) {
-      /* DOS error */
-    int n = (int)FormatMessage(
+    // DOS error
+    size_t n = (size_t)FormatMessage(
           FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
           NULL,
           errval,
@@ -1789,7 +1788,7 @@
           (DWORD)len,
           NULL);
     if (n > 3) {
-      /* Drop final '.', CR, LF */
+      // Drop final '.', CR, LF
       if (buf[n - 1] == '\n') n--;
       if (buf[n - 1] == '\r') n--;
       if (buf[n - 1] == '.') n--;
@@ -1799,17 +1798,25 @@
   }
 
   if (errno != 0) {
-    /* C runtime error that has no corresponding DOS error code */
-    const char *s = strerror(errno);
+    // C runtime error that has no corresponding DOS error code
+    const char* s = strerror(errno);
     size_t n = strlen(s);
     if (n >= len) n = len - 1;
     strncpy(buf, s, n);
     buf[n] = '\0';
     return n;
   }
+
   return 0;
 }
 
+int os::get_last_error() {
+  DWORD error = GetLastError();
+  if (error == 0)
+    error = errno;
+  return (int)error;
+}
+
 // sun.misc.Signal
 // NOTE that this is a workaround for an apparent kernel bug where if
 // a signal handler for SIGBREAK is installed then that signal handler
@@ -4746,7 +4753,7 @@
           fatal("corrupted C heap");
         }
       }
-      int err = GetLastError();
+      DWORD err = GetLastError();
       if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) {
         fatal(err_msg("heap walk aborted with error %d", err));
       }
@@ -4778,45 +4785,6 @@
   return EXCEPTION_CONTINUE_SEARCH;
 }
 
-static int getLastErrorString(char *buf, size_t len)
-{
-    long errval;
-
-    if ((errval = GetLastError()) != 0)
-    {
-      /* DOS error */
-      size_t n = (size_t)FormatMessage(
-            FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
-            NULL,
-            errval,
-            0,
-            buf,
-            (DWORD)len,
-            NULL);
-      if (n > 3) {
-        /* Drop final '.', CR, LF */
-        if (buf[n - 1] == '\n') n--;
-        if (buf[n - 1] == '\r') n--;
-        if (buf[n - 1] == '.') n--;
-        buf[n] = '\0';
-      }
-      return (int)n;
-    }
-
-    if (errno != 0)
-    {
-      /* C runtime error that has no corresponding DOS error code */
-      const char *s = strerror(errno);
-      size_t n = strlen(s);
-      if (n >= len) n = len - 1;
-      strncpy(buf, s, n);
-      buf[n] = '\0';
-      return (int)n;
-    }
-    return 0;
-}
-
-
 // We don't build a headless jre for Windows
 bool os::is_headless_jre() { return false; }
 
--- a/src/os_cpu/bsd_x86/vm/os_bsd_x86.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os_cpu/bsd_x86/vm/os_bsd_x86.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -28,6 +28,8 @@
   static void setup_fpu();
   static bool supports_sse();
 
+  static jlong rdtsc();
+
   static bool is_allocatable(size_t bytes);
 
   // Used to register dynamic code cache area with the OS
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/bsd_x86/vm/os_bsd_x86.inline.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef OS_CPU_BSD_X86_VM_OS_BSD_X86_INLINE_HPP
+#define OS_CPU_BSD_X86_VM_OS_BSD_X86_INLINE_HPP
+
+#include "runtime/os.hpp"
+
+// See http://www.technovelty.org/code/c/reading-rdtsc.htl for details
+inline jlong os::rdtsc() {
+#ifndef AMD64
+  // 64 bit result in edx:eax
+  uint64_t res;
+  __asm__ __volatile__ ("rdtsc" : "=A" (res));
+  return (jlong)res;
+#else
+  uint64_t res;
+  uint32_t ts1, ts2;
+  __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));
+  res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);
+  return (jlong)res;
+#endif // AMD64
+}
+
+#endif // OS_CPU_BSD_X86_VM_OS_BSD_X86_INLINE_HPP
--- a/src/os_cpu/linux_x86/vm/os_linux_x86.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os_cpu/linux_x86/vm/os_linux_x86.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -28,6 +28,8 @@
   static void setup_fpu();
   static bool supports_sse();
 
+  static jlong rdtsc();
+
   static bool is_allocatable(size_t bytes);
 
   // Used to register dynamic code cache area with the OS
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/linux_x86/vm/os_linux_x86.inline.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP
+#define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP
+
+#include "runtime/os.hpp"
+
+// See http://www.technovelty.org/code/c/reading-rdtsc.htl for details
+inline jlong os::rdtsc() {
+#ifndef AMD64
+  // 64 bit result in edx:eax
+  uint64_t res;
+  __asm__ __volatile__ ("rdtsc" : "=A" (res));
+  return (jlong)res;
+#else
+  uint64_t res;
+  uint32_t ts1, ts2;
+  __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));
+  res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);
+  return (jlong)res;
+#endif // AMD64
+}
+
+#endif // OS_CPU_LINUX_X86_VM_OS_LINUX_X86_INLINE_HPP
--- a/src/os_cpu/solaris_x86/vm/os_solaris_x86.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os_cpu/solaris_x86/vm/os_solaris_x86.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -46,6 +46,8 @@
 
   static bool supports_sse();
 
+  static jlong rdtsc();
+
   static bool is_allocatable(size_t bytes);
 
   // Used to register dynamic code cache area with the OS
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/solaris_x86/vm/os_solaris_x86.inline.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef OS_CPU_SOLARIS_X86_VM_OS_SOLARIS_X86_INLINE_HPP
+#define OS_CPU_SOLARIS_X86_VM_OS_SOLARIS_X86_INLINE_HPP
+
+#include "runtime/os.hpp"
+
+inline jlong os::rdtsc() { return _raw_rdtsc(); }
+
+#endif // OS_CPU_SOLARIS_X86_VM_OS_SOLARIS_X86_INLINE_HPP
--- a/src/os_cpu/solaris_x86/vm/solaris_x86_32.il	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os_cpu/solaris_x86/vm/solaris_x86_32.il	Fri Jan 06 16:18:29 2012 -0800
@@ -43,6 +43,11 @@
       movl     %ebp, %eax 
       .end
 
+  // Support for os::rdtsc()
+      .inline _raw_rdtsc,0
+      rdtsc
+      .end
+
   // Support for jint Atomic::add(jint inc, volatile jint* dest)
   // An additional bool (os::is_MP()) is passed as the last argument.
       .inline _Atomic_add,3
@@ -113,7 +118,6 @@
       fistpll   (%eax)
       .end
 
-
   // Support for OrderAccess::acquire()
       .inline _OrderAccess_acquire,0
       movl     0(%esp), %eax
--- a/src/os_cpu/solaris_x86/vm/solaris_x86_64.il	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os_cpu/solaris_x86/vm/solaris_x86_64.il	Fri Jan 06 16:18:29 2012 -0800
@@ -30,12 +30,19 @@
       movq     %fs:0, %rax 
       .end
 
-  // Get the frame pointer from current frame.
+  // Get current fp
       .inline _get_current_fp,0
       .volatile
       movq     %rbp, %rax 
       .end
 
+  // Support for os::rdtsc()
+      .inline _raw_rdtsc,0
+      rdtsc
+      salq     $32, %rdx
+      orq      %rdx, %rax
+      .end
+
   // Support for jint Atomic::add(jint add_value, volatile jint* dest)
       .inline _Atomic_add,2
       movl     %edi, %eax      // save add_value for return
--- a/src/os_cpu/windows_x86/vm/os_windows_x86.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/os_cpu/windows_x86/vm/os_windows_x86.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -58,6 +58,8 @@
   static void setup_fpu();
   static bool supports_sse() { return true; }
 
+  static jlong rdtsc();
+
   static bool      register_code_area(char *low, char *high);
 
 #endif // OS_CPU_WINDOWS_X86_VM_OS_WINDOWS_X86_HPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/windows_x86/vm/os_windows_x86.inline.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef OS_CPU_WINDOWS_X86_VM_OS_WINDOWS_X86_INLINE_HPP
+#define OS_CPU_WINDOWS_X86_VM_OS_WINDOWS_X86_INLINE_HPP
+
+#include "runtime/os.hpp"
+
+inline jlong os::rdtsc() {
+  // 32 bit: 64 bit result in edx:eax
+  // 64 bit: 64 bit value in rax
+  uint64_t res;
+  res = (uint64_t)__rdtsc();
+  return (jlong)res;
+}
+
+#endif // OS_CPU_WINDOWS_X86_VM_OS_WINDOWS_X86_INLINE_HPP
--- a/src/share/vm/classfile/classFileParser.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/share/vm/classfile/classFileParser.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -2666,18 +2666,23 @@
   _max_bootstrap_specifier_index = -1;
 
   if (JvmtiExport::should_post_class_file_load_hook()) {
-    // Get the cached class file bytes (if any) from the
-    // class that is being redefined.
-    JvmtiThreadState *state = JvmtiThreadState::state_for(jt);
-    KlassHandle      *h_class_being_redefined =
-                        state->get_class_being_redefined();
-    if (h_class_being_redefined != NULL) {
-      instanceKlassHandle ikh_class_being_redefined =
-        instanceKlassHandle(THREAD, (*h_class_being_redefined)());
-      cached_class_file_bytes =
-        ikh_class_being_redefined->get_cached_class_file_bytes();
-      cached_class_file_length =
-        ikh_class_being_redefined->get_cached_class_file_len();
+    // Get the cached class file bytes (if any) from the class that
+    // is being redefined or retransformed. We use jvmti_thread_state()
+    // instead of JvmtiThreadState::state_for(jt) so we don't allocate
+    // a JvmtiThreadState any earlier than necessary. This will help
+    // avoid the bug described by 7126851.
+    JvmtiThreadState *state = jt->jvmti_thread_state();
+    if (state != NULL) {
+      KlassHandle *h_class_being_redefined =
+                     state->get_class_being_redefined();
+      if (h_class_being_redefined != NULL) {
+        instanceKlassHandle ikh_class_being_redefined =
+          instanceKlassHandle(THREAD, (*h_class_being_redefined)());
+        cached_class_file_bytes =
+          ikh_class_being_redefined->get_cached_class_file_bytes();
+        cached_class_file_length =
+          ikh_class_being_redefined->get_cached_class_file_len();
+      }
     }
 
     unsigned char* ptr = cfs->buffer();
--- a/src/share/vm/runtime/init.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/share/vm/runtime/init.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -47,15 +47,16 @@
 void classLoader_init();
 void codeCache_init();
 void VM_Version_init();
+void os_init_globals();        // depends on VM_Version_init, before universe_init
 void stubRoutines_init1();
-jint universe_init();  // dependent on codeCache_init and stubRoutines_init
-void interpreter_init();  // before any methods loaded
-void invocationCounter_init();  // before any methods loaded
+jint universe_init();          // depends on codeCache_init and stubRoutines_init
+void interpreter_init();       // before any methods loaded
+void invocationCounter_init(); // before any methods loaded
 void marksweep_init();
 void accessFlags_init();
 void templateTable_init();
 void InterfaceSupport_init();
-void universe2_init();  // dependent on codeCache_init and stubRoutines_init
+void universe2_init();  // dependent on codeCache_init and stubRoutines_init, loads primordial classes
 void referenceProcessor_init();
 void jni_handles_init();
 void vmStructs_init();
@@ -94,8 +95,10 @@
   classLoader_init();
   codeCache_init();
   VM_Version_init();
+  os_init_globals();
   stubRoutines_init1();
-  jint status = universe_init();  // dependent on codeCache_init and stubRoutines_init
+  jint status = universe_init();  // dependent on codeCache_init and
+                                  // stubRoutines_init1
   if (status != JNI_OK)
     return status;
 
@@ -106,7 +109,7 @@
   templateTable_init();
   InterfaceSupport_init();
   SharedRuntime::generate_stubs();
-  universe2_init();  // dependent on codeCache_init and stubRoutines_init
+  universe2_init();  // dependent on codeCache_init and stubRoutines_init1
   referenceProcessor_init();
   jni_handles_init();
 #ifndef VM_STRUCTS_KERNEL
@@ -122,7 +125,7 @@
   if (!universe_post_init()) {
     return JNI_ERR;
   }
-  javaClasses_init();  // must happen after vtable initialization
+  javaClasses_init();   // must happen after vtable initialization
   stubRoutines_init2(); // note: StubRoutines need 2-phase init
 
   // Although we'd like to, we can't easily do a heap verify
--- a/src/share/vm/runtime/os.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/share/vm/runtime/os.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -82,6 +82,12 @@
 julong os::free_bytes = 0;          // # of bytes freed
 #endif
 
+void os_init_globals() {
+  // Called from init_globals().
+  // See Threads::create_vm() in thread.cpp, and init.cpp.
+  os::init_globals();
+}
+
 // Fill in buffer with current local time as an ISO-8601 string.
 // E.g., yyyy-mm-ddThh:mm:ss-zzzz.
 // Returns buffer, or NULL if it failed.
--- a/src/share/vm/runtime/os.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/share/vm/runtime/os.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -99,9 +99,11 @@
   }
 
  public:
-
   static void init(void);                      // Called before command line parsing
   static jint init_2(void);                    // Called after command line parsing
+  static void init_globals(void) {             // Called from init_globals() in init.cpp
+    init_globals_ext();
+  }
   static void init_3(void);                    // Called at the end of vm init
 
   // File names are case-insensitive on windows only
@@ -500,6 +502,7 @@
 
   static void print_location(outputStream* st, intptr_t x, bool verbose = false);
   static size_t lasterror(char *buf, size_t len);
+  static int get_last_error();
 
   // Determines whether the calling process is being debugged by a user-mode debugger.
   static bool is_debugger_attached();
@@ -671,6 +674,11 @@
   // rest of line is skipped. Returns number of bytes read or -1 on EOF
   static int get_line_chars(int fd, char *buf, const size_t bsize);
 
+  // Extensions
+#include "runtime/os_ext.hpp"
+
+ public:
+
   // Platform dependent stuff
 #ifdef TARGET_OS_FAMILY_linux
 # include "os_linux.hpp"
@@ -715,6 +723,7 @@
 # include "os_bsd_zero.hpp"
 #endif
 
+ public:
   // debugging support (mostly used by debug.cpp but also fatal error handler)
   static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/runtime/os_ext.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2011 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_RUNTIME_OS_EXT_HPP
+#define SHARE_VM_RUNTIME_OS_EXT_HPP
+
+ public:
+  static void init_globals_ext() {} // Run from init_globals().
+                                    // See os.hpp/cpp and init.cpp.
+
+ private:
+
+#endif // SHARE_VM_RUNTIME_OS_EXT_HPP
--- a/src/share/vm/services/management.hpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/share/vm/services/management.hpp	Fri Jan 06 16:18:29 2012 -0800
@@ -76,6 +76,9 @@
     _stamp.update();
   }
 
+  static jlong begin_vm_creation_time() {
+    return _begin_vm_creation_time->get_value();
+  }
   static jlong vm_init_done_time() {
     return _vm_init_done_time->get_value();
   }
--- a/src/share/vm/services/threadService.cpp	Thu Jan 05 21:02:05 2012 -0800
+++ b/src/share/vm/services/threadService.cpp	Fri Jan 06 16:18:29 2012 -0800
@@ -377,7 +377,7 @@
     }
 
   }
-
+  delete cycle;
   return deadlocks;
 }