jdk8-mips64-public/hotspot: src/os_cpu/solaris_sparc/vm/os_solaris

src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp@98cb887364d3 (annotated)

src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp

Fri, 27 Feb 2009 13:27:09 -0800

author: twisti
date: Fri, 27 Feb 2009 13:27:09 -0800
changeset 1040: 98cb887364d3
parent 435: a61af66fc99e
child 1106: d0994e5bebce
permissions: -rw-r--r--

6810672: Comment typos
Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never

 /*
  * 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 occurred 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)

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp@98cb887364d3 (annotated)

src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp