/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifdef _WIN32 # include <sys/stat.h> # if !defined WIN32_LEAN_AND_MEAN # define WIN32_LEAN_AND_MEAN # endif # include <windows.h> #endif
extern"C"void JNICALL abort_handler()
{ // If we are within JNI_CreateJavaVM then we jump back into getJavaVM if( g_bInGetJavaVM != 0 )
{
SAL_WARN("jfw", "JavaVM: JNI_CreateJavaVM called os::abort(), caught by abort_handler");
longjmp( jmp_jvm_abort, 0);
}
}
#ifndef ANDROID int createJvm(
JNI_CreateVM_Type * pCreateJavaVM, JavaVM ** pJavaVM, JNIEnv ** ppEnv, JavaVMInitArgs * vm_args)
{ /* We set a global flag which is used by the abort handler in order to determine whether it is should use longjmp to get back into this function. That is, the abort handler determines if it is on the same stack as this function and then jumps back into this function.
*/
g_bInGetJavaVM = 1;
jint err;
memset( jmp_jvm_abort, 0, sizeof(jmp_jvm_abort)); /* If the setjmp return value is not "0" then this point was reached by a longjmp in the abort_handler, which was called indirectly by JNI_CreateVM.
*/ if( setjmp( jmp_jvm_abort ) == 0)
{ //returns negative number on failure
err= pCreateJavaVM(pJavaVM, ppEnv, vm_args);
g_bInGetJavaVM = 0;
} else // set err to a positive number, so as or recognize that an abort (longjmp) //occurred
err= 1; return err;
} #endif
/** helper function to check Java version requirements
This function checks if the Java version of the given VendorBase meets the given Java version requirements.
@param aVendorInfo [in] the object to be inspected whether it meets the version requirements @param sMinVersion [in] represents the minimum version of a JRE. The string can be empty. @param sMaxVersion [in] represents the maximum version of a JRE. The string can be empty. @param arExcludeList [in] contains a list of "bad" versions. JREs which have one of these versions must not be returned by this function.
@return javaPluginError::NONE the function ran successfully and the version requirements are met javaPluginError::FailedVersion at least one of the version requirements (minVersion, maxVersion, excludeVersions) was violated javaPluginError::WrongVersionFormat the version strings in <code>sMinVersion,sMaxVersion,arExcludeList</code> are not recognized as valid version strings.
*/
javaPluginError checkJavaVersionRequirements(
rtl::Reference<VendorBase> const & aVendorInfo,
OUString const& sMinVersion,
OUString const& sMaxVersion,
std::vector<OUString> const & arExcludeList)
{ if (!aVendorInfo->isValidArch())
{ return javaPluginError::WrongArch;
} if (!sMinVersion.isEmpty())
{ try
{ if (aVendorInfo->compareVersions(sMinVersion) < 0) return javaPluginError::FailedVersion;
} catch (MalformedVersionException&)
{ //The minVersion was not recognized as valid for this vendor.
JFW_ENSURE( false, "[Java framework]sunjavaplugin does not know version: "
+ sMinVersion + " for vendor: " + aVendorInfo->getVendor()
+ " .Check minimum Version." ); return javaPluginError::WrongVersionFormat;
}
}
if (!sMaxVersion.isEmpty())
{ try
{ if (aVendorInfo->compareVersions(sMaxVersion) > 0) return javaPluginError::FailedVersion;
} catch (MalformedVersionException&)
{ //The maxVersion was not recognized as valid for this vendor.
JFW_ENSURE( false, "[Java framework]sunjavaplugin does not know version: "
+ sMaxVersion + " for vendor: " + aVendorInfo->getVendor()
+ " .Check maximum Version." ); return javaPluginError::WrongVersionFormat;
}
}
for (autoconst & sExVer: arExcludeList) { try
{ if (aVendorInfo->compareVersions(sExVer) == 0) return javaPluginError::FailedVersion;
} catch (MalformedVersionException&)
{ //The excluded version was not recognized as valid for this vendor.
JFW_ENSURE( false, "[Java framework]sunjavaplugin does not know version: "
+ sExVer + " for vendor: " + aVendorInfo->getVendor()
+ " .Check excluded versions." ); return javaPluginError::WrongVersionFormat;
}
}
vecVerifiedInfos.push_back(vecInfo);
} //Now vecVerifiedInfos contains all those JREs which meet the version requirements //Transfer them into the array that is passed out.
parJavaInfo->clear(); for (autoconst& vecVerifiedInfo : vecVerifiedInfos)
{
parJavaInfo->push_back(createJavaInfo(vecVerifiedInfo));
}
// copy infos of JREs that meet version requirements to vecVerifiedInfos for (autoconst& infosFromPath : vecInfosFromPath)
{ autoconst versionInfo = vendorSettings.getVersionInformation(infosFromPath->getVendor()); if (checkJavaVersionRequirements(
infosFromPath,
versionInfo.sMinVersion,
versionInfo.sMaxVersion,
versionInfo.vecExcludeVersions)
== javaPluginError::NONE)
{
vecVerifiedInfos.push_back(createJavaInfo(infosFromPath));
}
}
if (vecVerifiedInfos.empty()) return javaPluginError::NoJre;
javaInfosFromPath = std::move(vecVerifiedInfos);
return javaPluginError::NONE;
}
#ifdefined(_WIN32)
// Load msvcr71.dll using an explicit full path from where it is // present as bundled with the JRE. In case it is not found where we // think it should be, do nothing, and just let the implicit loading // that happens when loading the JVM take care of it.
staticvoid load_msvcr(std::u16string_view jvm_dll, std::u16string_view msvcr)
{ // First check if msvcr71.dll is in the same folder as jvm.dll. It // normally isn't, at least up to 1.6.0_22, but who knows if it // might be in the future.
std::size_t slash = jvm_dll.rfind('\\');
if (LoadLibraryW(
o3tl::toW(OUString(OUString::Concat(jvm_dll.substr(0, slash+1)) + msvcr).getStr()))) return;
// Then check if msvcr71.dll is in the parent folder of where // jvm.dll is. That is currently (1.6.0_22) as far as I know the // normal case.
slash = jvm_dll.substr(0, slash).rfind('\\');
// Check if the jvm DLL imports msvcr71.dll, and in that case try // loading it explicitly. In case something goes wrong, do nothing, // and just let the implicit loading try to take care of it. staticvoid do_msvcr_magic(OUString const &jvm_dll)
{ struct stat st;
/** starts a Java Virtual Machine. <p> The function shall ensure, that the VM does not abort the process during instantiation. </p>
*/
javaPluginError jfw_plugin_startJavaVirtualMachine( const JavaInfo *pInfo, const JavaVMOption* arOptions,
sal_Int32 cOptions,
JavaVM ** ppVm,
JNIEnv ** ppEnv)
{ static osl::Mutex aPluginMutex;
assert(pInfo != nullptr);
assert(ppVm != nullptr);
assert(ppEnv != nullptr);
osl::MutexGuard guard(aPluginMutex);
javaPluginError errorcode = javaPluginError::NONE; #ifdef MACOSX
rtl::Reference<VendorBase> aVendorInfo = getJREInfoByPath( pInfo->sLocation ); if ( !aVendorInfo.is() || aVendorInfo->compareVersions( pInfo->sVersion ) < 0 ) return javaPluginError::VmCreationFailed; #endif
OUString sRuntimeLib = getRuntimeLib(pInfo->arVendorData); #ifdefined MACOSX && defined __x86_64__ if ( !JvmfwkUtil_isLoadableJVM( sRuntimeLib ) ) return javaPluginError::VmCreationFailed; #endif
JFW_TRACE2("Using Java runtime library: " << sRuntimeLib);
#ifndef ANDROID // On linux we load jvm with RTLD_GLOBAL. This is necessary for debugging, because // libjdwp.so need a symbol (fork1) from libjvm which it only gets if the jvm is loaded // with RTLD_GLOBAL. On Solaris libjdwp.so is correctly linked with libjvm.so
osl::Module moduleRt; #ifdefined(LINUX) if (!moduleRt.load(sRuntimeLib, SAL_LOADMODULE_GLOBAL | SAL_LOADMODULE_NOW)) #elifdefined MACOSX // Must be SAL_LOADMODULE_GLOBAL when e.g. specifying a // -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 option to // JDK 1.8.0_121 at least, as JNI_CreateJavaVM -> Threads::create_vm -> // JvmtiExport::post_vm_initialized -> cbEarlyVMInit -> initialize -> // util_initialize -> sun.misc.VMSupport.getAgentProperties -> // Java_sun_misc_VMSupport_initAgentProperties -> // JDK_FindJvmEntry("JVM_INitAgentProperties") -> // dlsym(RTLD_DEFAULT, "JVM_INitAgentProperties"): if (!moduleRt.load(sRuntimeLib, SAL_LOADMODULE_GLOBAL)) #else #ifdefined(_WIN32)
do_msvcr_magic(sRuntimeLib); #endif if (!moduleRt.load(sRuntimeLib)) #endif
{
JFW_ENSURE(false, "[Java framework]sunjavaplugin" SAL_DLLEXTENSION " could not load Java runtime library: \n"
+ sRuntimeLib + "\n");
JFW_TRACE0("Could not load Java runtime library: " << sRuntimeLib); return javaPluginError::VmCreationFailed;
}
#ifdefined UNX && !defined MACOSX //Setting the JAVA_HOME is needed for awt
OUString sPathLocation;
osl::FileBase::getSystemPathFromFileURL(pInfo->sLocation, sPathLocation);
osl_setEnvironment(u"JAVA_HOME"_ustr.pData, sPathLocation.pData); #endif
// Valgrind typically emits many false errors when executing JIT'ed JVM // code, so force the JVM into interpreted mode: bool addForceInterpreted = FORCE_INTERPRETED > 0;
// Some testing with Java 1.4 showed that JavaVMOption.optionString has to // be encoded with the system encoding (i.e., osl_getThreadTextEncoding):
JavaVMInitArgs vm_args;
// We set an abort handler which is called when the VM calls _exit during // JNI_CreateJavaVM. This happens when the LD_LIBRARY_PATH does not contain // all some directories of the Java installation. This is necessary for // all versions below 1.5.1
options.emplace_back("abort", reinterpret_cast<void*>(abort_handler)); bool hasStackSize = false; #ifdef UNX // Until java 1.5 we need to put a plugin.jar or javaplugin.jar (<1.4.2) // in the class path in order to have applet support:
OString sAddPath = getPluginJarPath(pInfo->sVendor, pInfo->sLocation,pInfo->sVersion); #endif for (int i = 0; i < cOptions; i++)
{
OString opt(arOptions[i].optionString); #ifdef UNX if (opt.startsWith("-Djava.class.path="))
{ if (!sAddPath.isEmpty())
{
opt += OStringChar(SAL_PATHSEPARATOR) + sAddPath;
sAddPath.clear();
}
} #endif if (opt == "-Xint") {
addForceInterpreted = false;
} if (opt.startsWith("-Xss")) {
hasStackSize = true;
}
options.emplace_back(opt, arOptions[i].extraInfo);
} if (addForceInterpreted) {
options.emplace_back("-Xint", nullptr);
} if (!hasStackSize) { #ifdefined LINUX && (defined X86 || defined X86_64) // At least OpenJDK 1.8.0's os::workaround_expand_exec_shield_cs_limit // (hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp) can mmap an rwx // page into the area that the main stack can grow down to according to // "ulimit -s", as os::init_2's (hotspot/src/os/linux/vm/os_linux.cpp) // call to // // Linux::capture_initial_stack(JavaThread::stack_size_at_create()); // // caps _initial_thread_stack_size at threadStackSizeInBytes ,i.e., // -Xss, which appears to default to only 327680, whereas "ulimit -s" // defaults to 8192 * 1024 at least on Fedora 20; so attempt to pass in // a useful -Xss argument:
rlimit l; if (getrlimit(RLIMIT_STACK, &l) == 0) { if (l.rlim_cur == RLIM_INFINITY) {
SAL_INFO("jfw", "RLIMIT_STACK RLIM_INFINITY -> 8192K");
l.rlim_cur = 8192 * 1024;
} elseif (l.rlim_cur > 512 * 1024 * 1024) {
SAL_INFO( "jfw", "huge RLIMIT_STACK " << l.rlim_cur << " -> 8192K");
l.rlim_cur = 8192 * 1024;
}
options.emplace_back("-Xss" + OString::number(l.rlim_cur), nullptr);
} else { int e = errno;
SAL_WARN("jfw", "getrlimit(RLIMIT_STACK) failed with errno " << e);
} #endif
} #ifdef UNX if (!sAddPath.isEmpty()) {
options.emplace_back("-Djava.class.path=" + sAddPath, nullptr);
} #endif
if(err != 0)
{ if( err < 0)
{
SAL_WARN("jfw", "Can not create Java Virtual Machine, " << err);
errorcode = javaPluginError::VmCreationFailed;
} elseif( err > 0)
{
SAL_WARN("jfw", "Can not create JavaVirtualMachine, abort handler was called");
errorcode = javaPluginError::VmCreationFailed;
}
} else
{
*ppVm = pJavaVM;
JFW_TRACE2("JVM created");
} #else
(void) arOptions;
(void) cOptions;
(void) ppEnv; // On Android we always have a Java VM as we only expect this code // to be run in an Android app anyway.
*ppVm = lo_get_javavm(); #endif
javaPluginError ret = javaPluginError::NONE;
OUString sLocation(pInfo->sLocation);
if (sLocation.isEmpty()) return javaPluginError::InvalidArg;
::osl::DirectoryItem item;
::osl::File::RC rc_item = ::osl::DirectoryItem::get(sLocation, item); if (::osl::File::E_None == rc_item)
{
*exist = true;
} elseif (::osl::File::E_NOENT == rc_item)
{
*exist = false;
} else
{
ret = javaPluginError::Error;
} //We can have the situation that the JavaVM runtime library is not //contained within JAVA_HOME. Then the check for JAVA_HOME would return //true although the runtime library may not be loadable. //Or the JAVA_HOME directory of a deinstalled JRE left behind. if (ret == javaPluginError::NONE && *exist)
{
OUString sRuntimeLib = getRuntimeLib(pInfo->arVendorData);
JFW_TRACE2("Checking existence of Java runtime library");
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