--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,712 @@
+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// do not include  precompiled  header file
+
+# include <signal.h>        // needed first to avoid name collision for "std" with SC 5.0
+
+# include "incls/_os_solaris_sparc.cpp.incl"
+
+// put OS-includes here
+# include <sys/types.h>
+# include <sys/mman.h>
+# include <pthread.h>
+# include <errno.h>
+# include <dlfcn.h>
+# include <stdio.h>
+# include <unistd.h>
+# include <sys/resource.h>
+# include <thread.h>
+# include <sys/stat.h>
+# include <sys/time.h>
+# include <sys/filio.h>
+# include <sys/utsname.h>
+# include <sys/systeminfo.h>
+# include <sys/socket.h>
+# include <sys/lwp.h>
+# include <pwd.h>
+# include <poll.h>
+# include <sys/lwp.h>
+
+# define _STRUCTURED_PROC 1  //  this gets us the new structured proc interfaces of 5.6 & later
+# include <sys/procfs.h>     //  see comment in <sys/procfs.h>
+
+#define MAX_PATH (2 * K)
+
+// Minimum stack size for the VM.  It's easier to document a constant
+// but it's different for x86 and sparc because the page sizes are different.
+#ifdef _LP64
+size_t os::Solaris::min_stack_allowed = 128*K;
+#else
+size_t os::Solaris::min_stack_allowed = 96*K;
+#endif
+
+int os::Solaris::max_register_window_saves_before_flushing() {
+  // We should detect this at run time. For now, filling
+  // in with a constant.
+  return 8;
+}
+
+static void handle_unflushed_register_windows(gwindows_t *win) {
+  int restore_count = win->wbcnt;
+  int i;
+
+  for(i=0; i<restore_count; i++) {
+    address sp = ((address)win->spbuf[i]) + STACK_BIAS;
+    address reg_win = (address)&win->wbuf[i];
+    memcpy(sp,reg_win,sizeof(struct rwindow));
+  }
+}
+
+char* os::non_memory_address_word() {
+  // Must never look like an address returned by reserve_memory,
+  // even in its subfields (as defined by the CPU immediate fields,
+  // if the CPU splits constants across multiple instructions).
+  // On SPARC, 0 != %hi(any real address), because there is no
+  // allocation in the first 1Kb of the virtual address space.
+  return (char*) 0;
+}
+
+// Validate a ucontext retrieved from walking a uc_link of a ucontext.
+// There are issues with libthread giving out uc_links for different threads
+// on the same uc_link chain and bad or circular links.
+//
+bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) {
+  if (valid >= suspect ||
+      valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
+      valid->uc_stack.ss_sp    != suspect->uc_stack.ss_sp    ||
+      valid->uc_stack.ss_size  != suspect->uc_stack.ss_size) {
+    DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
+    return false;
+  }
+
+  if (thread->is_Java_thread()) {
+    if (!valid_stack_address(thread, (address)suspect)) {
+      DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
+      return false;
+    }
+    address _sp   = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
+    if (!valid_stack_address(thread, _sp) ||
+        !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
+      DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
+      return false;
+    }
+  }
+  return true;
+}
+
+// We will only follow one level of uc_link since there are libthread
+// issues with ucontext linking and it is better to be safe and just
+// let caller retry later.
+ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
+  ucontext_t *uc) {
+
+  ucontext_t *retuc = NULL;
+
+  // Sometimes the topmost register windows are not properly flushed.
+  // i.e., if the kernel would have needed to take a page fault
+  if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
+    ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
+  }
+
+  if (uc != NULL) {
+    if (uc->uc_link == NULL) {
+      // cannot validate without uc_link so accept current ucontext
+      retuc = uc;
+    } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
+      // first ucontext is valid so try the next one
+      uc = uc->uc_link;
+      if (uc->uc_link == NULL) {
+        // cannot validate without uc_link so accept current ucontext
+        retuc = uc;
+      } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
+        // the ucontext one level down is also valid so return it
+        retuc = uc;
+      }
+    }
+  }
+  return retuc;
+}
+
+// Assumes ucontext is valid
+ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
+  address pc = (address)uc->uc_mcontext.gregs[REG_PC];
+  // set npc to zero to avoid using it for safepoint, good for profiling only
+  return ExtendedPC(pc);
+}
+
+// Assumes ucontext is valid
+intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) {
+  return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
+}
+
+// Solaris X86 only
+intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) {
+  ShouldNotReachHere();
+  return NULL;
+}
+
+// For Forte Analyzer AsyncGetCallTrace profiling support - thread
+// is currently interrupted by SIGPROF.
+//
+// ret_fp parameter is only used by Solaris X86.
+//
+// The difference between this and os::fetch_frame_from_context() is that
+// here we try to skip nested signal frames.
+ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
+  ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
+
+  assert(thread != NULL, "just checking");
+  assert(ret_sp != NULL, "just checking");
+  assert(ret_fp == NULL, "just checking");
+
+  ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
+
+  return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
+}
+
+
+// ret_fp parameter is only used by Solaris X86.
+ExtendedPC os::fetch_frame_from_context(void* ucVoid,
+                    intptr_t** ret_sp, intptr_t** ret_fp) {
+
+  ExtendedPC  epc;
+  ucontext_t *uc = (ucontext_t*)ucVoid;
+
+  if (uc != NULL) {
+    epc = os::Solaris::ucontext_get_ExtendedPC(uc);
+    if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
+  } else {
+    // construct empty ExtendedPC for return value checking
+    epc = ExtendedPC(NULL);
+    if (ret_sp) *ret_sp = (intptr_t *)NULL;
+  }
+
+  return epc;
+}
+
+frame os::fetch_frame_from_context(void* ucVoid) {
+  intptr_t* sp;
+  intptr_t* fp;
+  ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
+  return frame(sp, frame::unpatchable, epc.pc());
+}
+
+frame os::get_sender_for_C_frame(frame* fr) {
+  return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
+}
+
+frame os::current_frame() {
+  intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
+  frame myframe(sp, frame::unpatchable,
+                CAST_FROM_FN_PTR(address, os::current_frame));
+  if (os::is_first_C_frame(&myframe)) {
+    // stack is not walkable
+    return frame(NULL, NULL, NULL);
+  } else {
+    return os::get_sender_for_C_frame(&myframe);
+  }
+}
+
+
+void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) {
+  Thread*     thread = args->thread();
+  ucontext_t* uc     = args->ucontext();
+  intptr_t* sp;
+
+  assert(ProfileVM && thread->is_VM_thread(), "just checking");
+
+  // Skip the mcontext corruption verification. If if occasionally
+  // things get corrupt, it is ok for profiling - we will just get an unresolved
+  // function name
+  ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]);
+  _addr = new_addr;
+}
+
+
+static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) {
+  char lwpstatusfile[PROCFILE_LENGTH];
+  int lwpfd, err;
+
+  if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs))
+    return (err);
+  if (*flags == TRS_LWPID) {
+    sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(),
+            *lwp);
+    if ((lwpfd = open(lwpstatusfile, O_RDONLY)) < 0) {
+      perror("thr_mutator_status: open lwpstatus");
+      return (EINVAL);
+    }
+    if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) !=
+        sizeof (lwpstatus_t)) {
+      perror("thr_mutator_status: read lwpstatus");
+      (void) close(lwpfd);
+      return (EINVAL);
+    }
+    (void) close(lwpfd);
+  }
+  return (0);
+}
+
+
+bool os::is_allocatable(size_t bytes) {
+#ifdef _LP64
+   return true;
+#else
+   return (bytes <= (size_t)3835*M);
+#endif
+}
+
+extern "C" void Fetch32PFI () ;
+extern "C" void Fetch32Resume () ;
+extern "C" void FetchNPFI () ;
+extern "C" void FetchNResume () ;
+
+extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized);
+
+int JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, int abort_if_unrecognized) {
+  ucontext_t* uc = (ucontext_t*) ucVoid;
+
+  Thread* t = ThreadLocalStorage::get_thread_slow();
+
+  SignalHandlerMark shm(t);
+
+  if(sig == SIGPIPE || sig == SIGXFSZ) {
+    if (os::Solaris::chained_handler(sig, info, ucVoid)) {
+      return true;
+    } else {
+      if (PrintMiscellaneous && (WizardMode || Verbose)) {
+        char buf[64];
+        warning("Ignoring %s - see 4229104 or 6499219",
+                os::exception_name(sig, buf, sizeof(buf)));
+
+      }
+      return true;
+    }
+  }
+
+  JavaThread* thread = NULL;
+  VMThread* vmthread = NULL;
+  if (os::Solaris::signal_handlers_are_installed) {
+    if (t != NULL ){
+      if(t->is_Java_thread()) {
+        thread = (JavaThread*)t;
+      }
+      else if(t->is_VM_thread()){
+        vmthread = (VMThread *)t;
+      }
+    }
+  }
+
+  guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
+
+  if (sig == os::Solaris::SIGasync()) {
+    if (thread) {
+      OSThread::InterruptArguments args(thread, uc);
+      thread->osthread()->do_interrupt_callbacks_at_interrupt(&args);
+      return true;
+    } else if (vmthread) {
+      OSThread::InterruptArguments args(vmthread, uc);
+      vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args);
+      return true;
+    } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
+      return true;
+    } else {
+      // If os::Solaris::SIGasync not chained, and this is a non-vm and
+      // non-java thread
+      return true;
+    }
+  }
+
+  if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
+    // can't decode this kind of signal
+    info = NULL;
+  } else {
+    assert(sig == info->si_signo, "bad siginfo");
+  }
+
+  // decide if this trap can be handled by a stub
+  address stub = NULL;
+
+  address pc          = NULL;
+  address npc         = NULL;
+
+  //%note os_trap_1
+  if (info != NULL && uc != NULL && thread != NULL) {
+    // factor me: getPCfromContext
+    pc  = (address) uc->uc_mcontext.gregs[REG_PC];
+    npc = (address) uc->uc_mcontext.gregs[REG_nPC];
+
+    // SafeFetch() support
+    // Implemented with either a fixed set of addresses such
+    // as Fetch32*, or with Thread._OnTrap.
+    if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) {
+      uc->uc_mcontext.gregs [REG_PC]  = intptr_t(Fetch32Resume) ;
+      uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ;
+      return true ;
+    }
+    if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) {
+      uc->uc_mcontext.gregs [REG_PC]  = intptr_t(FetchNResume) ;
+      uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ;
+      return true ;
+    }
+
+    // Handle ALL stack overflow variations here
+    if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
+      address addr = (address) info->si_addr;
+      if (thread->in_stack_yellow_zone(addr)) {
+        thread->disable_stack_yellow_zone();
+        // Sometimes the register windows are not properly flushed.
+        if(uc->uc_mcontext.gwins != NULL) {
+          ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
+        }
+        if (thread->thread_state() == _thread_in_Java) {
+          // Throw a stack overflow exception.  Guard pages will be reenabled
+          // while unwinding the stack.
+          stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
+        } else {
+          // Thread was in the vm or native code.  Return and try to finish.
+          return true;
+        }
+      } else if (thread->in_stack_red_zone(addr)) {
+        // Fatal red zone violation.  Disable the guard pages and fall through
+        // to handle_unexpected_exception way down below.
+        thread->disable_stack_red_zone();
+        tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
+        // Sometimes the register windows are not properly flushed.
+        if(uc->uc_mcontext.gwins != NULL) {
+          ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
+        }
+      }
+    }
+
+
+    if (thread->thread_state() == _thread_in_vm) {
+      if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
+        stub = StubRoutines::handler_for_unsafe_access();
+      }
+    }
+
+    else if (thread->thread_state() == _thread_in_Java) {
+      // Java thread running in Java code => find exception handler if any
+      // a fault inside compiled code, the interpreter, or a stub
+
+      // Support Safepoint Polling
+      if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
+        stub = SharedRuntime::get_poll_stub(pc);
+      }
+
+      // Not needed on x86 solaris because verify_oops doesn't generate
+      // SEGV/BUS like sparc does.
+      if ( (sig == SIGSEGV || sig == SIGBUS)
+           && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
+           && pc <  MacroAssembler::_verify_oop_implicit_branch[1] ) {
+        stub     =  MacroAssembler::_verify_oop_implicit_branch[2];
+        warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
+      }
+
+      // This is not factored because on x86 solaris the patching for
+      // zombies does not generate a SEGV.
+      else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
+        // zombie method (ld [%g0],%o7 instruction)
+        stub = SharedRuntime::get_handle_wrong_method_stub();
+
+        // At the stub it needs to look like a call from the caller of this
+        // method (not a call from the segv site).
+        pc = (address)uc->uc_mcontext.gregs[REG_O7];
+      }
+      else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
+        // BugId 4454115: A read from a MappedByteBuffer can fault
+        // here if the underlying file has been truncated.
+        // Do not crash the VM in such a case.
+        CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
+        nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
+        if (nm != NULL && nm->has_unsafe_access()) {
+          stub = StubRoutines::handler_for_unsafe_access();
+        }
+      }
+
+      else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
+        // integer divide by zero
+        stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
+      }
+      else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
+        // floating-point divide by zero
+        stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
+      }
+#ifdef COMPILER2
+      else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
+#ifdef ASSERT
+  #ifdef TIERED
+        CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
+        assert(cb->is_compiled_by_c2(), "Wrong compiler");
+  #endif // TIERED
+#endif // ASSERT
+        // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
+        stub = SharedRuntime::get_ic_miss_stub();
+        // At the stub it needs to look like a call from the caller of this
+        // method (not a call from the segv site).
+        pc = (address)uc->uc_mcontext.gregs[REG_O7];
+      }
+#endif  // COMPILER2
+
+      else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
+        // Determination of interpreter/vtable stub/compiled code null exception
+        stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
+      }
+    }
+
+    // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
+    // and the heap gets shrunk before the field access.
+    if ((sig == SIGSEGV) || (sig == SIGBUS)) {
+      address addr = JNI_FastGetField::find_slowcase_pc(pc);
+      if (addr != (address)-1) {
+        stub = addr;
+      }
+    }
+
+    // Check to see if we caught the safepoint code in the
+    // process of write protecting the memory serialization page.
+    // It write enables the page immediately after protecting it
+    // so just return.
+    if ((sig == SIGSEGV) &&
+        os::is_memory_serialize_page(thread, (address)info->si_addr)) {
+      // Block current thread until the memory serialize page permission restored.
+      os::block_on_serialize_page_trap();
+      return true;
+    }
+  }
+
+  if (stub != NULL) {
+    // save all thread context in case we need to restore it
+
+    thread->set_saved_exception_pc(pc);
+    thread->set_saved_exception_npc(npc);
+
+    // simulate a branch to the stub (a "call" in the safepoint stub case)
+    // factor me: setPC
+    uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub;
+    uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4);
+
+#ifndef PRODUCT
+    if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
+#endif /* PRODUCT */
+
+    return true;
+  }
+
+  // signal-chaining
+  if (os::Solaris::chained_handler(sig, info, ucVoid)) {
+    return true;
+  }
+
+  if (!abort_if_unrecognized) {
+    // caller wants another chance, so give it to him
+    return false;
+  }
+
+  if (!os::Solaris::libjsig_is_loaded) {
+    struct sigaction oldAct;
+    sigaction(sig, (struct sigaction *)0, &oldAct);
+    if (oldAct.sa_sigaction != signalHandler) {
+      void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
+                                          : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
+      warning("Unexpected Signal %d occured under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
+    }
+  }
+
+  if (pc == NULL && uc != NULL) {
+    pc = (address) uc->uc_mcontext.gregs[REG_PC];
+  }
+
+  // unmask current signal
+  sigset_t newset;
+  sigemptyset(&newset);
+  sigaddset(&newset, sig);
+  sigprocmask(SIG_UNBLOCK, &newset, NULL);
+
+  VMError err(t, sig, pc, info, ucVoid);
+  err.report_and_die();
+
+  ShouldNotReachHere();
+}
+
+void os::print_context(outputStream *st, void *context) {
+  if (context == NULL) return;
+
+  ucontext_t *uc = (ucontext_t*)context;
+  st->print_cr("Registers:");
+
+  st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
+               " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
+                 uc->uc_mcontext.gregs[REG_O0],
+                 uc->uc_mcontext.gregs[REG_O1],
+                 uc->uc_mcontext.gregs[REG_O2],
+                 uc->uc_mcontext.gregs[REG_O3]);
+  st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
+               " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
+            uc->uc_mcontext.gregs[REG_O4],
+            uc->uc_mcontext.gregs[REG_O5],
+            uc->uc_mcontext.gregs[REG_O6],
+            uc->uc_mcontext.gregs[REG_O7]);
+
+  st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
+               " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
+            uc->uc_mcontext.gregs[REG_G1],
+            uc->uc_mcontext.gregs[REG_G2],
+            uc->uc_mcontext.gregs[REG_G3],
+            uc->uc_mcontext.gregs[REG_G4]);
+  st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
+               " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
+            uc->uc_mcontext.gregs[REG_G5],
+            uc->uc_mcontext.gregs[REG_G6],
+            uc->uc_mcontext.gregs[REG_G7],
+            uc->uc_mcontext.gregs[REG_Y]);
+
+  st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
+            uc->uc_mcontext.gregs[REG_PC],
+            uc->uc_mcontext.gregs[REG_nPC]);
+  st->cr();
+  st->cr();
+
+  intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
+  st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
+  print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
+  st->cr();
+
+  // Note: it may be unsafe to inspect memory near pc. For example, pc may
+  // point to garbage if entry point in an nmethod is corrupted. Leave
+  // this at the end, and hope for the best.
+  ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
+  address pc = epc.pc();
+  st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
+  print_hex_dump(st, pc - 16, pc + 16, sizeof(char));
+}
+
+void os::Solaris::init_thread_fpu_state(void) {
+    // Nothing needed on Sparc.
+}
+
+#if !defined(COMPILER2) && !defined(_LP64)
+
+// These routines are the initial value of atomic_xchg_entry(),
+// atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
+// until initialization is complete.
+// TODO - remove when the VM drops support for V8.
+
+typedef jint  xchg_func_t        (jint,  volatile jint*);
+typedef jint  cmpxchg_func_t     (jint,  volatile jint*,  jint);
+typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
+typedef jint  add_func_t         (jint,  volatile jint*);
+typedef void  fence_func_t       ();
+
+jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
+  // try to use the stub:
+  xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
+
+  if (func != NULL) {
+    os::atomic_xchg_func = func;
+    return (*func)(exchange_value, dest);
+  }
+  assert(Threads::number_of_threads() == 0, "for bootstrap only");
+
+  jint old_value = *dest;
+  *dest = exchange_value;
+  return old_value;
+}
+
+jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
+  // try to use the stub:
+  cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
+
+  if (func != NULL) {
+    os::atomic_cmpxchg_func = func;
+    return (*func)(exchange_value, dest, compare_value);
+  }
+  assert(Threads::number_of_threads() == 0, "for bootstrap only");
+
+  jint old_value = *dest;
+  if (old_value == compare_value)
+    *dest = exchange_value;
+  return old_value;
+}
+
+jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
+  // try to use the stub:
+  cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
+
+  if (func != NULL) {
+    os::atomic_cmpxchg_long_func = func;
+    return (*func)(exchange_value, dest, compare_value);
+  }
+  assert(Threads::number_of_threads() == 0, "for bootstrap only");
+
+  jlong old_value = *dest;
+  if (old_value == compare_value)
+    *dest = exchange_value;
+  return old_value;
+}
+
+jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
+  // try to use the stub:
+  add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
+
+  if (func != NULL) {
+    os::atomic_add_func = func;
+    return (*func)(add_value, dest);
+  }
+  assert(Threads::number_of_threads() == 0, "for bootstrap only");
+
+  return (*dest) += add_value;
+}
+
+void os::fence_bootstrap() {
+  // try to use the stub:
+  fence_func_t* func = CAST_TO_FN_PTR(fence_func_t*, StubRoutines::fence_entry());
+
+  if (func != NULL) {
+    os::fence_func = func;
+    (*func)();
+    return;
+  }
+  assert(Threads::number_of_threads() == 0, "for bootstrap only");
+
+  // don't have to do anything for a single thread
+}
+
+xchg_func_t*         os::atomic_xchg_func         = os::atomic_xchg_bootstrap;
+cmpxchg_func_t*      os::atomic_cmpxchg_func      = os::atomic_cmpxchg_bootstrap;
+cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
+add_func_t*          os::atomic_add_func          = os::atomic_add_bootstrap;
+fence_func_t*        os::fence_func               = os::fence_bootstrap;
+
+#endif // !_LP64 && !COMPILER2
+
+#if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
+ // See file build/solaris/makefiles/$compiler.make
+ // For compiler1 the architecture is v8 and frps isn't present in v8
+ extern "C"  void _mark_fpu_nosave() {
+   __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
+  }
+#endif //defined(__sparc) && defined(COMPILER2)