| /* |
| * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
| * Copyright (c) 2021, Azul Systems, 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| // no precompiled headers |
| #include "jvm.h" |
| #include "asm/macroAssembler.hpp" |
| #include "classfile/classLoader.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "code/codeCache.hpp" |
| #include "code/icBuffer.hpp" |
| #include "code/vtableStubs.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "logging/log.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "os_share_bsd.hpp" |
| #include "prims/jniFastGetField.hpp" |
| #include "prims/jvm_misc.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/extendedPC.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/interfaceSupport.inline.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/mutexLocker.hpp" |
| #include "runtime/osThread.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/stubRoutines.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "runtime/timer.hpp" |
| #include "utilities/align.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/vmError.hpp" |
| |
| // put OS-includes here |
| # include <sys/types.h> |
| # include <sys/mman.h> |
| # include <pthread.h> |
| # include <signal.h> |
| # include <errno.h> |
| # include <dlfcn.h> |
| # include <stdlib.h> |
| # include <stdio.h> |
| # include <unistd.h> |
| # include <sys/resource.h> |
| # include <sys/stat.h> |
| # include <sys/time.h> |
| # include <sys/utsname.h> |
| # include <sys/socket.h> |
| # include <sys/wait.h> |
| # include <pwd.h> |
| # include <poll.h> |
| #ifndef __OpenBSD__ |
| # include <ucontext.h> |
| #endif |
| |
| #if !defined(__APPLE__) && !defined(__NetBSD__) |
| # include <pthread_np.h> |
| #endif |
| |
| #define SPELL_REG_SP "sp" |
| #define SPELL_REG_FP "fp" |
| |
| #ifdef __APPLE__ |
| // see darwin-xnu/osfmk/mach/arm/_structs.h |
| |
| // 10.5 UNIX03 member name prefixes |
| #define DU3_PREFIX(s, m) __ ## s.__ ## m |
| #endif |
| |
| #define context_x uc_mcontext->DU3_PREFIX(ss,x) |
| #define context_fp uc_mcontext->DU3_PREFIX(ss,fp) |
| #define context_lr uc_mcontext->DU3_PREFIX(ss,lr) |
| #define context_sp uc_mcontext->DU3_PREFIX(ss,sp) |
| #define context_pc uc_mcontext->DU3_PREFIX(ss,pc) |
| #define context_cpsr uc_mcontext->DU3_PREFIX(ss,cpsr) |
| #define context_esr uc_mcontext->DU3_PREFIX(es,esr) |
| |
| address os::current_stack_pointer() { |
| #if defined(__clang__) || defined(__llvm__) |
| void *sp; |
| __asm__("mov %0, " SPELL_REG_SP : "=r"(sp)); |
| return (address) sp; |
| #else |
| register void *sp __asm__ (SPELL_REG_SP); |
| return (address) sp; |
| #endif |
| } |
| |
| 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). |
| |
| // the return value used in computation of Universe::non_oop_word(), which |
| // is loaded by cpu/aarch64 by MacroAssembler::movptr(Register, uintptr_t) |
| return (char*) 0xffffffffffff; |
| } |
| |
| address os::Bsd::ucontext_get_pc(const ucontext_t * uc) { |
| return (address)uc->context_pc; |
| } |
| |
| void os::Bsd::ucontext_set_pc(ucontext_t * uc, address pc) { |
| uc->context_pc = (intptr_t)pc; |
| } |
| |
| intptr_t* os::Bsd::ucontext_get_sp(const ucontext_t * uc) { |
| return (intptr_t*)uc->context_sp; |
| } |
| |
| intptr_t* os::Bsd::ucontext_get_fp(const ucontext_t * uc) { |
| return (intptr_t*)uc->context_fp; |
| } |
| |
| // For Forte Analyzer AsyncGetCallTrace profiling support - thread |
| // is currently interrupted by SIGPROF. |
| // os::Solaris::fetch_frame_from_ucontext() tries to skip nested signal |
| // frames. Currently we don't do that on Linux, so it's the same as |
| // os::fetch_frame_from_context(). |
| ExtendedPC os::Bsd::fetch_frame_from_ucontext(Thread* thread, |
| const 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"); |
| |
| return os::fetch_frame_from_context(uc, ret_sp, ret_fp); |
| } |
| |
| ExtendedPC os::fetch_frame_from_context(const void* ucVoid, |
| intptr_t** ret_sp, intptr_t** ret_fp) { |
| |
| ExtendedPC epc; |
| const ucontext_t* uc = (const ucontext_t*)ucVoid; |
| |
| if (uc != NULL) { |
| epc = ExtendedPC(os::Bsd::ucontext_get_pc(uc)); |
| if (ret_sp) *ret_sp = os::Bsd::ucontext_get_sp(uc); |
| if (ret_fp) *ret_fp = os::Bsd::ucontext_get_fp(uc); |
| } else { |
| // construct empty ExtendedPC for return value checking |
| epc = ExtendedPC(NULL); |
| if (ret_sp) *ret_sp = (intptr_t *)NULL; |
| if (ret_fp) *ret_fp = (intptr_t *)NULL; |
| } |
| |
| return epc; |
| } |
| |
| frame os::fetch_frame_from_context(const void* ucVoid) { |
| intptr_t* sp; |
| intptr_t* fp; |
| ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); |
| return frame(sp, fp, epc.pc()); |
| } |
| |
| bool os::Bsd::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) { |
| address pc = (address) os::Bsd::ucontext_get_pc(uc); |
| if (Interpreter::contains(pc)) { |
| // interpreter performs stack banging after the fixed frame header has |
| // been generated while the compilers perform it before. To maintain |
| // semantic consistency between interpreted and compiled frames, the |
| // method returns the Java sender of the current frame. |
| *fr = os::fetch_frame_from_context(uc); |
| if (!fr->is_first_java_frame()) { |
| assert(fr->safe_for_sender(thread), "Safety check"); |
| *fr = fr->java_sender(); |
| } |
| } else { |
| // more complex code with compiled code |
| assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above"); |
| CodeBlob* cb = CodeCache::find_blob(pc); |
| if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) { |
| // Not sure where the pc points to, fallback to default |
| // stack overflow handling |
| return false; |
| } else { |
| // In compiled code, the stack banging is performed before LR |
| // has been saved in the frame. LR is live, and SP and FP |
| // belong to the caller. |
| intptr_t* fp = os::Bsd::ucontext_get_fp(uc); |
| intptr_t* sp = os::Bsd::ucontext_get_sp(uc); |
| address pc = (address)(uc->context_lr |
| - NativeInstruction::instruction_size); |
| *fr = frame(sp, fp, pc); |
| if (!fr->is_java_frame()) { |
| assert(fr->safe_for_sender(thread), "Safety check"); |
| assert(!fr->is_first_frame(), "Safety check"); |
| *fr = fr->java_sender(); |
| } |
| } |
| } |
| assert(fr->is_java_frame(), "Safety check"); |
| return true; |
| } |
| |
| // JVM compiled with -fno-omit-frame-pointer, so RFP is saved on the stack. |
| frame os::get_sender_for_C_frame(frame* fr) { |
| return frame(fr->link(), fr->link(), fr->sender_pc()); |
| } |
| |
| NOINLINE frame os::current_frame() { |
| intptr_t *fp = *(intptr_t **)__builtin_frame_address(0); |
| frame myframe((intptr_t*)os::current_stack_pointer(), |
| (intptr_t*)fp, |
| CAST_FROM_FN_PTR(address, os::current_frame)); |
| if (os::is_first_C_frame(&myframe)) { |
| // stack is not walkable |
| return frame(); |
| } else { |
| return os::get_sender_for_C_frame(&myframe); |
| } |
| } |
| |
| // Utility functions |
| extern "C" JNIEXPORT int |
| JVM_handle_bsd_signal(int sig, |
| siginfo_t* info, |
| void* ucVoid, |
| int abort_if_unrecognized) { |
| ucontext_t* uc = (ucontext_t*) ucVoid; |
| |
| Thread* t = Thread::current_or_null_safe(); |
| |
| // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away |
| // (no destructors can be run) |
| os::ThreadCrashProtection::check_crash_protection(sig, t); |
| |
| SignalHandlerMark shm(t); |
| |
| // Note: it's not uncommon that JNI code uses signal/sigset to install |
| // then restore certain signal handler (e.g. to temporarily block SIGPIPE, |
| // or have a SIGILL handler when detecting CPU type). When that happens, |
| // JVM_handle_bsd_signal() might be invoked with junk info/ucVoid. To |
| // avoid unnecessary crash when libjsig is not preloaded, try handle signals |
| // that do not require siginfo/ucontext first. |
| |
| if (sig == SIGPIPE || sig == SIGXFSZ) { |
| // allow chained handler to go first |
| if (os::Bsd::chained_handler(sig, info, ucVoid)) { |
| return true; |
| } else { |
| // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219 |
| return true; |
| } |
| } |
| |
| #ifdef CAN_SHOW_REGISTERS_ON_ASSERT |
| if ((sig == SIGSEGV || sig == SIGBUS) && info != NULL && info->si_addr == g_assert_poison) { |
| if (handle_assert_poison_fault(ucVoid, info->si_addr)) { |
| return 1; |
| } |
| } |
| #endif |
| |
| JavaThread* thread = NULL; |
| VMThread* vmthread = NULL; |
| if (os::Bsd::signal_handlers_are_installed) { |
| if (t != NULL ){ |
| if(t->is_Java_thread()) { |
| thread = (JavaThread*)t; |
| } |
| else if(t->is_VM_thread()){ |
| vmthread = (VMThread *)t; |
| } |
| } |
| } |
| |
| // Handle SafeFetch faults: |
| if (uc != NULL) { |
| address const pc = (address) os::Bsd::ucontext_get_pc(uc); |
| if (pc && StubRoutines::is_safefetch_fault(pc)) { |
| os::Bsd::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc)); |
| return 1; |
| } |
| } |
| |
| // decide if this trap can be handled by a stub |
| address stub = NULL; |
| |
| address pc = NULL; |
| |
| //%note os_trap_1 |
| if (info != NULL && uc != NULL && thread != NULL) { |
| pc = (address) os::Bsd::ucontext_get_pc(uc); |
| |
| // Handle ALL stack overflow variations here |
| if (sig == SIGSEGV || sig == SIGBUS) { |
| address addr = (address) info->si_addr; |
| |
| // check if fault address is within thread stack |
| if (thread->on_local_stack(addr)) { |
| ThreadWXEnable wx(WXWrite, thread); |
| // stack overflow |
| if (thread->in_stack_yellow_reserved_zone(addr)) { |
| if (thread->thread_state() == _thread_in_Java) { |
| if (thread->in_stack_reserved_zone(addr)) { |
| frame fr; |
| if (os::Bsd::get_frame_at_stack_banging_point(thread, uc, &fr)) { |
| assert(fr.is_java_frame(), "Must be a Java frame"); |
| frame activation = |
| SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); |
| if (activation.sp() != NULL) { |
| thread->disable_stack_reserved_zone(); |
| if (activation.is_interpreted_frame()) { |
| thread->set_reserved_stack_activation((address)( |
| activation.fp() + frame::interpreter_frame_initial_sp_offset)); |
| } else { |
| thread->set_reserved_stack_activation((address)activation.unextended_sp()); |
| } |
| return 1; |
| } |
| } |
| } |
| // Throw a stack overflow exception. Guard pages will be reenabled |
| // while unwinding the stack. |
| thread->disable_stack_yellow_reserved_zone(); |
| 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. |
| thread->disable_stack_yellow_reserved_zone(); |
| return 1; |
| } |
| } 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."); |
| } |
| } |
| } |
| |
| // We test if stub is already set (by the stack overflow code |
| // above) so it is not overwritten by the code that follows. This |
| // check is not required on other platforms, because on other |
| // platforms we check for SIGSEGV only or SIGBUS only, where here |
| // we have to check for both SIGSEGV and SIGBUS. |
| if (thread->thread_state() == _thread_in_Java && stub == NULL) { |
| // Java thread running in Java code => find exception handler if any |
| // a fault inside compiled code, the interpreter, or a stub |
| ThreadWXEnable wx(WXWrite, thread); |
| // Handle signal from NativeJump::patch_verified_entry(). |
| if ((sig == SIGILL) |
| && nativeInstruction_at(pc)->is_sigill_zombie_not_entrant()) { |
| if (TraceTraps) { |
| tty->print_cr("trap: zombie_not_entrant"); |
| } |
| stub = SharedRuntime::get_handle_wrong_method_stub(); |
| } else if ((sig == SIGSEGV || sig == SIGBUS) && os::is_poll_address((address)info->si_addr)) { |
| stub = SharedRuntime::get_poll_stub(pc); |
| #if defined(__APPLE__) |
| // 32-bit Darwin reports a SIGBUS for nearly all memory access exceptions. |
| // 64-bit Darwin may also use a SIGBUS (seen with compressed oops). |
| // Catching SIGBUS here prevents the implicit SIGBUS NULL check below from |
| // being called, so only do so if the implicit NULL check is not necessary. |
| } else if (sig == SIGBUS && MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { |
| #else |
| } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) { |
| #endif |
| // 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); |
| CompiledMethod* nm = (cb != NULL) ? cb->as_compiled_method_or_null() : NULL; |
| if ((nm != NULL && nm->has_unsafe_access())) { |
| address next_pc = pc + NativeCall::instruction_size; |
| stub = SharedRuntime::handle_unsafe_access(thread, next_pc); |
| } |
| } |
| else |
| |
| if (sig == SIGFPE && |
| (info->si_code == FPE_INTDIV || info->si_code == FPE_FLTDIV)) { |
| stub = |
| SharedRuntime:: |
| continuation_for_implicit_exception(thread, |
| pc, |
| SharedRuntime:: |
| IMPLICIT_DIVIDE_BY_ZERO); |
| #ifdef __APPLE__ |
| } else if (sig == SIGFPE && info->si_code == FPE_NOOP) { |
| Unimplemented(); |
| #endif /* __APPLE__ */ |
| |
| } else if ((sig == SIGSEGV || sig == SIGBUS) && |
| !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); |
| } |
| } else if ((thread->thread_state() == _thread_in_vm || |
| thread->thread_state() == _thread_in_native) && |
| sig == SIGBUS && /* info->si_code == BUS_OBJERR && */ |
| thread->doing_unsafe_access()) { |
| address next_pc = pc + NativeCall::instruction_size; |
| stub = SharedRuntime::handle_unsafe_access(thread, next_pc); |
| } |
| |
| // 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 we can just return to retry the write. |
| 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 |
| if (thread != NULL) thread->set_saved_exception_pc(pc); |
| |
| os::Bsd::ucontext_set_pc(uc, stub); |
| return true; |
| } |
| |
| // signal-chaining |
| if (os::Bsd::chained_handler(sig, info, ucVoid)) { |
| return true; |
| } |
| |
| if (!abort_if_unrecognized) { |
| // caller wants another chance, so give it to him |
| return false; |
| } |
| |
| if (pc == NULL && uc != NULL) { |
| pc = os::Bsd::ucontext_get_pc(uc); |
| } |
| |
| // unmask current signal |
| sigset_t newset; |
| sigemptyset(&newset); |
| sigaddset(&newset, sig); |
| sigprocmask(SIG_UNBLOCK, &newset, NULL); |
| |
| VMError::report_and_die(t, sig, pc, info, ucVoid); |
| |
| ShouldNotReachHere(); |
| return true; // Mute compiler |
| } |
| |
| void os::Bsd::init_thread_fpu_state(void) { |
| } |
| |
| bool os::is_allocatable(size_t bytes) { |
| return true; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // thread stack |
| |
| // Minimum usable stack sizes required to get to user code. Space for |
| // HotSpot guard pages is added later. |
| size_t os::Posix::_compiler_thread_min_stack_allowed = 72 * K; |
| size_t os::Posix::_java_thread_min_stack_allowed = 72 * K; |
| size_t os::Posix::_vm_internal_thread_min_stack_allowed = 72 * K; |
| |
| // return default stack size for thr_type |
| size_t os::Posix::default_stack_size(os::ThreadType thr_type) { |
| // default stack size (compiler thread needs larger stack) |
| size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); |
| return s; |
| } |
| |
| static void current_stack_region(address * bottom, size_t * size) { |
| #ifdef __APPLE__ |
| pthread_t self = pthread_self(); |
| void *stacktop = pthread_get_stackaddr_np(self); |
| *size = pthread_get_stacksize_np(self); |
| *bottom = (address) stacktop - *size; |
| #elif defined(__OpenBSD__) |
| stack_t ss; |
| int rslt = pthread_stackseg_np(pthread_self(), &ss); |
| |
| if (rslt != 0) |
| fatal("pthread_stackseg_np failed with error = %d", rslt); |
| |
| *bottom = (address)((char *)ss.ss_sp - ss.ss_size); |
| *size = ss.ss_size; |
| #else |
| pthread_attr_t attr; |
| |
| int rslt = pthread_attr_init(&attr); |
| |
| // JVM needs to know exact stack location, abort if it fails |
| if (rslt != 0) |
| fatal("pthread_attr_init failed with error = %d", rslt); |
| |
| rslt = pthread_attr_get_np(pthread_self(), &attr); |
| |
| if (rslt != 0) |
| fatal("pthread_attr_get_np failed with error = %d", rslt); |
| |
| if (pthread_attr_getstackaddr(&attr, (void **)bottom) != 0 || |
| pthread_attr_getstacksize(&attr, size) != 0) { |
| fatal("Can not locate current stack attributes!"); |
| } |
| |
| pthread_attr_destroy(&attr); |
| #endif |
| assert(os::current_stack_pointer() >= *bottom && |
| os::current_stack_pointer() < *bottom + *size, "just checking"); |
| } |
| |
| address os::current_stack_base() { |
| address bottom; |
| size_t size; |
| current_stack_region(&bottom, &size); |
| return (bottom + size); |
| } |
| |
| size_t os::current_stack_size() { |
| // stack size includes normal stack and HotSpot guard pages |
| address bottom; |
| size_t size; |
| current_stack_region(&bottom, &size); |
| return size; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // helper functions for fatal error handler |
| |
| void os::print_context(outputStream *st, const void *context) { |
| if (context == NULL) return; |
| |
| const ucontext_t *uc = (const ucontext_t*)context; |
| st->print_cr("Registers:"); |
| st->print( " x0=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 0]); |
| st->print(" x1=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 1]); |
| st->print(" x2=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 2]); |
| st->print(" x3=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 3]); |
| st->cr(); |
| st->print( " x4=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 4]); |
| st->print(" x5=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 5]); |
| st->print(" x6=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 6]); |
| st->print(" x7=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 7]); |
| st->cr(); |
| st->print( " x8=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 8]); |
| st->print(" x9=" INTPTR_FORMAT, (intptr_t)uc->context_x[ 9]); |
| st->print(" x10=" INTPTR_FORMAT, (intptr_t)uc->context_x[10]); |
| st->print(" x11=" INTPTR_FORMAT, (intptr_t)uc->context_x[11]); |
| st->cr(); |
| st->print( "x12=" INTPTR_FORMAT, (intptr_t)uc->context_x[12]); |
| st->print(" x13=" INTPTR_FORMAT, (intptr_t)uc->context_x[13]); |
| st->print(" x14=" INTPTR_FORMAT, (intptr_t)uc->context_x[14]); |
| st->print(" x15=" INTPTR_FORMAT, (intptr_t)uc->context_x[15]); |
| st->cr(); |
| st->print( "x16=" INTPTR_FORMAT, (intptr_t)uc->context_x[16]); |
| st->print(" x17=" INTPTR_FORMAT, (intptr_t)uc->context_x[17]); |
| st->print(" x18=" INTPTR_FORMAT, (intptr_t)uc->context_x[18]); |
| st->print(" x19=" INTPTR_FORMAT, (intptr_t)uc->context_x[19]); |
| st->cr(); |
| st->print( "x20=" INTPTR_FORMAT, (intptr_t)uc->context_x[20]); |
| st->print(" x21=" INTPTR_FORMAT, (intptr_t)uc->context_x[21]); |
| st->print(" x22=" INTPTR_FORMAT, (intptr_t)uc->context_x[22]); |
| st->print(" x23=" INTPTR_FORMAT, (intptr_t)uc->context_x[23]); |
| st->cr(); |
| st->print( "x24=" INTPTR_FORMAT, (intptr_t)uc->context_x[24]); |
| st->print(" x25=" INTPTR_FORMAT, (intptr_t)uc->context_x[25]); |
| st->print(" x26=" INTPTR_FORMAT, (intptr_t)uc->context_x[26]); |
| st->print(" x27=" INTPTR_FORMAT, (intptr_t)uc->context_x[27]); |
| st->cr(); |
| st->print( "x28=" INTPTR_FORMAT, (intptr_t)uc->context_x[28]); |
| st->print(" fp=" INTPTR_FORMAT, (intptr_t)uc->context_fp); |
| st->print(" lr=" INTPTR_FORMAT, (intptr_t)uc->context_lr); |
| st->print(" sp=" INTPTR_FORMAT, (intptr_t)uc->context_sp); |
| st->cr(); |
| st->print( "pc=" INTPTR_FORMAT, (intptr_t)uc->context_pc); |
| st->print(" cpsr=" INTPTR_FORMAT, (intptr_t)uc->context_cpsr); |
| st->cr(); |
| |
| intptr_t *sp = (intptr_t *)os::Bsd::ucontext_get_sp(uc); |
| st->print_cr("Top of Stack: (sp=" INTPTR_FORMAT ")", (intptr_t)sp); |
| print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), 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. |
| address pc = os::Bsd::ucontext_get_pc(uc); |
| print_instructions(st, pc, sizeof(char)); |
| st->cr(); |
| } |
| |
| void os::print_register_info(outputStream *st, const void *context) { |
| if (context == NULL) return; |
| |
| const ucontext_t *uc = (const ucontext_t*)context; |
| |
| st->print_cr("Register to memory mapping:"); |
| st->cr(); |
| |
| // this is horrendously verbose but the layout of the registers in the |
| // context does not match how we defined our abstract Register set, so |
| // we can't just iterate through the gregs area |
| |
| // this is only for the "general purpose" registers |
| |
| st->print(" x0="); print_location(st, uc->context_x[ 0]); |
| st->print(" x1="); print_location(st, uc->context_x[ 1]); |
| st->print(" x2="); print_location(st, uc->context_x[ 2]); |
| st->print(" x3="); print_location(st, uc->context_x[ 3]); |
| st->print(" x4="); print_location(st, uc->context_x[ 4]); |
| st->print(" x5="); print_location(st, uc->context_x[ 5]); |
| st->print(" x6="); print_location(st, uc->context_x[ 6]); |
| st->print(" x7="); print_location(st, uc->context_x[ 7]); |
| st->print(" x8="); print_location(st, uc->context_x[ 8]); |
| st->print(" x9="); print_location(st, uc->context_x[ 9]); |
| st->print("x10="); print_location(st, uc->context_x[10]); |
| st->print("x11="); print_location(st, uc->context_x[11]); |
| st->print("x12="); print_location(st, uc->context_x[12]); |
| st->print("x13="); print_location(st, uc->context_x[13]); |
| st->print("x14="); print_location(st, uc->context_x[14]); |
| st->print("x15="); print_location(st, uc->context_x[15]); |
| st->print("x16="); print_location(st, uc->context_x[16]); |
| st->print("x17="); print_location(st, uc->context_x[17]); |
| st->print("x18="); print_location(st, uc->context_x[18]); |
| st->print("x19="); print_location(st, uc->context_x[19]); |
| st->print("x20="); print_location(st, uc->context_x[20]); |
| st->print("x21="); print_location(st, uc->context_x[21]); |
| st->print("x22="); print_location(st, uc->context_x[22]); |
| st->print("x23="); print_location(st, uc->context_x[23]); |
| st->print("x24="); print_location(st, uc->context_x[24]); |
| st->print("x25="); print_location(st, uc->context_x[25]); |
| st->print("x26="); print_location(st, uc->context_x[26]); |
| st->print("x27="); print_location(st, uc->context_x[27]); |
| st->print("x28="); print_location(st, uc->context_x[28]); |
| |
| st->cr(); |
| } |
| |
| void os::setup_fpu() { |
| } |
| |
| #ifndef PRODUCT |
| void os::verify_stack_alignment() { |
| assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); |
| } |
| #endif |
| |
| int os::extra_bang_size_in_bytes() { |
| // AArch64 does not require the additional stack bang. |
| return 0; |
| } |
| |
| void os::current_thread_enable_wx(WXMode mode) { |
| pthread_jit_write_protect_np(mode == WXExec); |
| } |
| |
| extern "C" { |
| int SpinPause() { |
| return 0; |
| } |
| |
| void _Copy_conjoint_jshorts_atomic(const jshort* from, jshort* to, size_t count) { |
| if (from > to) { |
| const jshort *end = from + count; |
| while (from < end) |
| *(to++) = *(from++); |
| } |
| else if (from < to) { |
| const jshort *end = from; |
| from += count - 1; |
| to += count - 1; |
| while (from >= end) |
| *(to--) = *(from--); |
| } |
| } |
| void _Copy_conjoint_jints_atomic(const jint* from, jint* to, size_t count) { |
| if (from > to) { |
| const jint *end = from + count; |
| while (from < end) |
| *(to++) = *(from++); |
| } |
| else if (from < to) { |
| const jint *end = from; |
| from += count - 1; |
| to += count - 1; |
| while (from >= end) |
| *(to--) = *(from--); |
| } |
| } |
| void _Copy_conjoint_jlongs_atomic(const jlong* from, jlong* to, size_t count) { |
| if (from > to) { |
| const jlong *end = from + count; |
| while (from < end) |
| os::atomic_copy64(from++, to++); |
| } |
| else if (from < to) { |
| const jlong *end = from; |
| from += count - 1; |
| to += count - 1; |
| while (from >= end) |
| os::atomic_copy64(from--, to--); |
| } |
| } |
| |
| void _Copy_arrayof_conjoint_bytes(const HeapWord* from, |
| HeapWord* to, |
| size_t count) { |
| memmove(to, from, count); |
| } |
| void _Copy_arrayof_conjoint_jshorts(const HeapWord* from, |
| HeapWord* to, |
| size_t count) { |
| memmove(to, from, count * 2); |
| } |
| void _Copy_arrayof_conjoint_jints(const HeapWord* from, |
| HeapWord* to, |
| size_t count) { |
| memmove(to, from, count * 4); |
| } |
| void _Copy_arrayof_conjoint_jlongs(const HeapWord* from, |
| HeapWord* to, |
| size_t count) { |
| memmove(to, from, count * 8); |
| } |
| }; |