Mercurial > hg > truffle
diff src/os/windows/vm/decoder_windows.cpp @ 4988:eb5b24d1499f
Merge
author | Christian Haeubl <christian.haeubl@oracle.com> |
---|---|
date | Mon, 27 Feb 2012 15:06:36 -0800 |
parents | d7e3846464d0 |
children | 3b01d0321dfa |
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--- a/src/os/windows/vm/decoder_windows.cpp Mon Feb 27 14:50:58 2012 -0800 +++ b/src/os/windows/vm/decoder_windows.cpp Mon Feb 27 15:06:36 2012 -0800 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -24,22 +24,24 @@ #include "precompiled.hpp" #include "prims/jvm.h" -#include "runtime/os.hpp" -#include "utilities/decoder.hpp" +#include "decoder_windows.hpp" + +WindowsDecoder::WindowsDecoder() { + _dbghelp_handle = NULL; + _can_decode_in_vm = false; + _pfnSymGetSymFromAddr64 = NULL; + _pfnUndecorateSymbolName = NULL; -HMODULE Decoder::_dbghelp_handle = NULL; -bool Decoder::_can_decode_in_vm = false; -pfn_SymGetSymFromAddr64 Decoder::_pfnSymGetSymFromAddr64 = NULL; -pfn_UndecorateSymbolName Decoder::_pfnUndecorateSymbolName = NULL; + _decoder_status = no_error; + initialize(); +} -void Decoder::initialize() { - if (!_initialized) { - _initialized = true; - - HINSTANCE handle = os::win32::load_Windows_dll("dbghelp.dll", NULL, 0); +void WindowsDecoder::initialize() { + if (!has_error() && _dbghelp_handle == NULL) { + HMODULE handle = ::LoadLibrary("dbghelp.dll"); if (!handle) { _decoder_status = helper_not_found; - return; + return; } _dbghelp_handle = handle; @@ -70,32 +72,29 @@ // find out if jvm.dll contains private symbols, by decoding // current function and comparing the result - address addr = (address)Decoder::initialize; + address addr = (address)Decoder::decode; char buf[MAX_PATH]; - if (decode(addr, buf, sizeof(buf), NULL) == no_error) { - _can_decode_in_vm = !strcmp(buf, "Decoder::initialize"); + if (decode(addr, buf, sizeof(buf), NULL)) { + _can_decode_in_vm = !strcmp(buf, "Decoder::decode"); } } } -void Decoder::uninitialize() { - assert(_initialized, "Decoder not yet initialized"); +void WindowsDecoder::uninitialize() { _pfnSymGetSymFromAddr64 = NULL; _pfnUndecorateSymbolName = NULL; if (_dbghelp_handle != NULL) { ::FreeLibrary(_dbghelp_handle); } - _initialized = false; + _dbghelp_handle = NULL; } -bool Decoder::can_decode_C_frame_in_vm() { - initialize(); - return _can_decode_in_vm; +bool WindowsDecoder::can_decode_C_frame_in_vm() const { + return (!has_error() && _can_decode_in_vm); } -Decoder::decoder_status Decoder::decode(address addr, char *buf, int buflen, int *offset) { - assert(_initialized, "Decoder not yet initialized"); +bool WindowsDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* modulepath) { if (_pfnSymGetSymFromAddr64 != NULL) { PIMAGEHLP_SYMBOL64 pSymbol; char symbolInfo[MAX_PATH + sizeof(IMAGEHLP_SYMBOL64)]; @@ -105,19 +104,20 @@ DWORD64 displacement; if (_pfnSymGetSymFromAddr64(::GetCurrentProcess(), (DWORD64)addr, &displacement, pSymbol)) { if (buf != NULL) { - if (!demangle(pSymbol->Name, buf, buflen)) { + if (demangle(pSymbol->Name, buf, buflen)) { jio_snprintf(buf, buflen, "%s", pSymbol->Name); } } - if (offset != NULL) *offset = (int)displacement; - return no_error; + if(offset != NULL) *offset = (int)displacement; + return true; } } - return helper_not_found; + if (buf != NULL && buflen > 0) buf[0] = '\0'; + if (offset != NULL) *offset = -1; + return false; } -bool Decoder::demangle(const char* symbol, char *buf, int buflen) { - assert(_initialized, "Decoder not yet initialized"); +bool WindowsDecoder::demangle(const char* symbol, char *buf, int buflen) { return _pfnUndecorateSymbolName != NULL && _pfnUndecorateSymbolName(symbol, buf, buflen, UNDNAME_COMPLETE); }