| /* |
| * 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 "incls/_os_windows_x86.cpp.incl" |
| # include "unwind_windows_x86.hpp" |
| #undef REG_SP |
| #undef REG_FP |
| #undef REG_PC |
| #ifdef AMD64 |
| #define REG_SP Rsp |
| #define REG_FP Rbp |
| #define REG_PC Rip |
| #else |
| #define REG_SP Esp |
| #define REG_FP Ebp |
| #define REG_PC Eip |
| #endif // AMD64 |
| |
| extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); |
| |
| // Install a win32 structured exception handler around thread. |
| void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { |
| __try { |
| |
| #ifndef AMD64 |
| // We store the current thread in this wrapperthread location |
| // and determine how far away this address is from the structured |
| // execption pointer that FS:[0] points to. This get_thread |
| // code can then get the thread pointer via FS. |
| // |
| // Warning: This routine must NEVER be inlined since we'd end up with |
| // multiple offsets. |
| // |
| volatile Thread* wrapperthread = thread; |
| |
| if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) { |
| int thread_ptr_offset; |
| __asm { |
| lea eax, dword ptr wrapperthread; |
| sub eax, dword ptr FS:[0H]; |
| mov thread_ptr_offset, eax |
| }; |
| ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset); |
| } |
| #ifdef ASSERT |
| // Verify that the offset hasn't changed since we initally captured |
| // it. This might happen if we accidentally ended up with an |
| // inlined version of this routine. |
| else { |
| int test_thread_ptr_offset; |
| __asm { |
| lea eax, dword ptr wrapperthread; |
| sub eax, dword ptr FS:[0H]; |
| mov test_thread_ptr_offset, eax |
| }; |
| assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(), |
| "thread pointer offset from SEH changed"); |
| } |
| #endif // ASSERT |
| #endif // !AMD64 |
| |
| f(value, method, args, thread); |
| } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { |
| // Nothing to do. |
| } |
| } |
| |
| #ifdef AMD64 |
| |
| // This is the language specific handler for exceptions |
| // originating from dynamically generated code. |
| // We call the standard structured exception handler |
| // We only expect Continued Execution since we cannot unwind |
| // from generated code. |
| LONG HandleExceptionFromCodeCache( |
| IN PEXCEPTION_RECORD ExceptionRecord, |
| IN ULONG64 EstablisherFrame, |
| IN OUT PCONTEXT ContextRecord, |
| IN OUT PDISPATCHER_CONTEXT DispatcherContext) { |
| EXCEPTION_POINTERS ep; |
| LONG result; |
| |
| ep.ExceptionRecord = ExceptionRecord; |
| ep.ContextRecord = ContextRecord; |
| |
| result = topLevelExceptionFilter(&ep); |
| |
| // We better only get a CONTINUE_EXECUTION from our handler |
| // since we don't have unwind information registered. |
| |
| guarantee( result == EXCEPTION_CONTINUE_EXECUTION, |
| "Unexpected result from topLevelExceptionFilter"); |
| |
| return(ExceptionContinueExecution); |
| } |
| |
| |
| // Structure containing the Windows Data Structures required |
| // to register our Code Cache exception handler. |
| // We put these in the CodeCache since the API requires |
| // all addresses in these structures are relative to the Code |
| // area registered with RtlAddFunctionTable. |
| typedef struct { |
| char ExceptionHandlerInstr[16]; // jmp HandleExceptionFromCodeCache |
| RUNTIME_FUNCTION rt; |
| UNWIND_INFO_EH_ONLY unw; |
| } DynamicCodeData, *pDynamicCodeData; |
| |
| #endif // AMD64 |
| // |
| // Register our CodeCache area with the OS so it will dispatch exceptions |
| // to our topLevelExceptionFilter when we take an exception in our |
| // dynamically generated code. |
| // |
| // Arguments: low and high are the address of the full reserved |
| // codeCache area |
| // |
| bool os::register_code_area(char *low, char *high) { |
| #ifdef AMD64 |
| |
| ResourceMark rm; |
| |
| pDynamicCodeData pDCD; |
| PRUNTIME_FUNCTION prt; |
| PUNWIND_INFO_EH_ONLY punwind; |
| |
| // If we are using Vectored Exceptions we don't need this registration |
| if (UseVectoredExceptions) return true; |
| |
| BufferBlob* b = BufferBlob::create("CodeCache Exception Handler", sizeof (DynamicCodeData)); |
| CodeBuffer cb(b->instructions_begin(), b->instructions_size()); |
| MacroAssembler* masm = new MacroAssembler(&cb); |
| pDCD = (pDynamicCodeData) masm->pc(); |
| |
| masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache)); |
| masm->flush(); |
| |
| // Create an Unwind Structure specifying no unwind info |
| // other than an Exception Handler |
| punwind = &pDCD->unw; |
| punwind->Version = 1; |
| punwind->Flags = UNW_FLAG_EHANDLER; |
| punwind->SizeOfProlog = 0; |
| punwind->CountOfCodes = 0; |
| punwind->FrameRegister = 0; |
| punwind->FrameOffset = 0; |
| punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) - |
| (char*)low; |
| punwind->ExceptionData[0] = 0; |
| |
| // This structure describes the covered dynamic code area. |
| // Addresses are relative to the beginning on the code cache area |
| prt = &pDCD->rt; |
| prt->BeginAddress = 0; |
| prt->EndAddress = (ULONG)(high - low); |
| prt->UnwindData = ((char *)punwind - low); |
| |
| guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low), |
| "Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable"); |
| |
| #endif // AMD64 |
| return true; |
| } |
| |
| void os::initialize_thread() { |
| // Nothing to do. |
| } |
| |
| // Atomics and Stub Functions |
| |
| typedef jint xchg_func_t (jint, volatile jint*); |
| typedef intptr_t xchg_ptr_func_t (intptr_t, volatile intptr_t*); |
| 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 intptr_t add_ptr_func_t (intptr_t, volatile intptr_t*); |
| typedef void fence_func_t (); |
| |
| #ifdef AMD64 |
| |
| 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; |
| } |
| |
| intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) { |
| // try to use the stub: |
| xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry()); |
| |
| if (func != NULL) { |
| os::atomic_xchg_ptr_func = func; |
| return (*func)(exchange_value, dest); |
| } |
| assert(Threads::number_of_threads() == 0, "for bootstrap only"); |
| |
| intptr_t 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; |
| } |
| #endif // AMD64 |
| |
| 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; |
| } |
| |
| #ifdef AMD64 |
| |
| 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; |
| } |
| |
| intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) { |
| // try to use the stub: |
| add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry()); |
| |
| if (func != NULL) { |
| os::atomic_add_ptr_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; |
| xchg_ptr_func_t* os::atomic_xchg_ptr_func = os::atomic_xchg_ptr_bootstrap; |
| cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; |
| add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; |
| add_ptr_func_t* os::atomic_add_ptr_func = os::atomic_add_ptr_bootstrap; |
| fence_func_t* os::fence_func = os::fence_bootstrap; |
| |
| #endif // AMD64 |
| |
| cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; |
| |
| ExtendedPC os::fetch_frame_from_context(void* ucVoid, |
| intptr_t** ret_sp, intptr_t** ret_fp) { |
| |
| ExtendedPC epc; |
| CONTEXT* uc = (CONTEXT*)ucVoid; |
| |
| if (uc != NULL) { |
| epc = ExtendedPC((address)uc->REG_PC); |
| if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP; |
| if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP; |
| } 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(void* ucVoid) { |
| intptr_t* sp; |
| intptr_t* fp; |
| ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); |
| return frame(sp, fp, epc.pc()); |
| } |
| |
| // VC++ does not save frame pointer on stack in optimized build. It |
| // can be turned off by /Oy-. If we really want to walk C frames, |
| // we can use the StackWalk() API. |
| frame os::get_sender_for_C_frame(frame* fr) { |
| return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); |
| } |
| |
| |
| #ifndef AMD64 |
| intptr_t* _get_previous_fp() { |
| intptr_t **frameptr; |
| __asm { |
| mov frameptr, ebp |
| }; |
| return *frameptr; |
| } |
| #endif // !AMD64 |
| |
| frame os::current_frame() { |
| |
| #ifdef AMD64 |
| // apparently _asm not supported on windows amd64 |
| typedef intptr_t* get_fp_func (); |
| get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*, |
| StubRoutines::amd64::get_previous_fp_entry()); |
| if (func == NULL) return frame(NULL, NULL, NULL); |
| intptr_t* fp = (*func)(); |
| #else |
| intptr_t* fp = _get_previous_fp(); |
| #endif // AMD64 |
| |
| 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(NULL, NULL, NULL); |
| } else { |
| return os::get_sender_for_C_frame(&myframe); |
| } |
| } |
| |
| void os::print_context(outputStream *st, void *context) { |
| if (context == NULL) return; |
| |
| CONTEXT* uc = (CONTEXT*)context; |
| |
| st->print_cr("Registers:"); |
| #ifdef AMD64 |
| st->print( "EAX=" INTPTR_FORMAT, uc->Rax); |
| st->print(", EBX=" INTPTR_FORMAT, uc->Rbx); |
| st->print(", ECX=" INTPTR_FORMAT, uc->Rcx); |
| st->print(", EDX=" INTPTR_FORMAT, uc->Rdx); |
| st->cr(); |
| st->print( "ESP=" INTPTR_FORMAT, uc->Rsp); |
| st->print(", EBP=" INTPTR_FORMAT, uc->Rbp); |
| st->print(", ESI=" INTPTR_FORMAT, uc->Rsi); |
| st->print(", EDI=" INTPTR_FORMAT, uc->Rdi); |
| st->cr(); |
| st->print( "EIP=" INTPTR_FORMAT, uc->Rip); |
| st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); |
| #else |
| st->print( "EAX=" INTPTR_FORMAT, uc->Eax); |
| st->print(", EBX=" INTPTR_FORMAT, uc->Ebx); |
| st->print(", ECX=" INTPTR_FORMAT, uc->Ecx); |
| st->print(", EDX=" INTPTR_FORMAT, uc->Edx); |
| st->cr(); |
| st->print( "ESP=" INTPTR_FORMAT, uc->Esp); |
| st->print(", EBP=" INTPTR_FORMAT, uc->Ebp); |
| st->print(", ESI=" INTPTR_FORMAT, uc->Esi); |
| st->print(", EDI=" INTPTR_FORMAT, uc->Edi); |
| st->cr(); |
| st->print( "EIP=" INTPTR_FORMAT, uc->Eip); |
| st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); |
| #endif // AMD64 |
| st->cr(); |
| st->cr(); |
| |
| intptr_t *sp = (intptr_t *)uc->REG_SP; |
| 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. |
| address pc = (address)uc->REG_PC; |
| st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); |
| print_hex_dump(st, pc - 16, pc + 16, sizeof(char)); |
| st->cr(); |
| } |
| |
| extern "C" int SafeFetch32 (int * adr, int Err) { |
| int rv = Err ; |
| _try { |
| rv = *((volatile int *) adr) ; |
| } __except(EXCEPTION_EXECUTE_HANDLER) { |
| } |
| return rv ; |
| } |
| |
| extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t Err) { |
| intptr_t rv = Err ; |
| _try { |
| rv = *((volatile intptr_t *) adr) ; |
| } __except(EXCEPTION_EXECUTE_HANDLER) { |
| } |
| return rv ; |
| } |
| |
| extern "C" int SpinPause () { |
| #ifdef AMD64 |
| return 0 ; |
| #else |
| // pause == rep:nop |
| // On systems that don't support pause a rep:nop |
| // is executed as a nop. The rep: prefix is ignored. |
| _asm { |
| pause ; |
| }; |
| return 1 ; |
| #endif // AMD64 |
| } |
| |
| |
| void os::setup_fpu() { |
| #ifndef AMD64 |
| int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std(); |
| __asm fldcw fpu_cntrl_word; |
| #endif // !AMD64 |
| } |