src/os/windows/vm/decoder_windows.cpp
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -22,23 +22,25 @@
*
*/
#include "precompiled.hpp"
#include "prims/jvm.h"
-#include "runtime/os.hpp"
-#include "utilities/decoder.hpp"
+#include "decoder_windows.hpp"
-HMODULE Decoder::_dbghelp_handle = NULL;
-bool Decoder::_can_decode_in_vm = false;
-pfn_SymGetSymFromAddr64 Decoder::_pfnSymGetSymFromAddr64 = NULL;
-pfn_UndecorateSymbolName Decoder::_pfnUndecorateSymbolName = NULL;
+WindowsDecoder::WindowsDecoder() {
+ _dbghelp_handle = NULL;
+ _can_decode_in_vm = false;
+ _pfnSymGetSymFromAddr64 = NULL;
+ _pfnUndecorateSymbolName = NULL;
-void Decoder::initialize() {
- if (!_initialized) {
- _initialized = true;
+ _decoder_status = no_error;
+ initialize();
+}
- 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;
}
@@ -68,57 +70,55 @@
return;
}
// 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::get_decoder;
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::get_decoder");
}
}
}
-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)];
pSymbol = (PIMAGEHLP_SYMBOL64)symbolInfo;
pSymbol->MaxNameLength = MAX_PATH;
pSymbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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) *offset = (int)displacement;
+ return true;
}
}
- return helper_not_found;
+ if (buf != 0 && buflen > 0) buf[0] = '\0';
+ if (offset) *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);
}