Guilherme Ottoni
98 linhas
3.4 KiB
C++
98 linhas
3.4 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include "hphp/runtime/vm/funcdict.h"
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#include "hphp/runtime/base/runtime_option.h"
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#include "hphp/util/base.h"
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#include "hphp/runtime/base/execution_context.h"
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#include "hphp/runtime/base/runtime_error.h"
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#include "hphp/runtime/ext_hhvm/ext_hhvm.h"
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#include "hphp/runtime/vm/jit/translator.h"
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#include "hphp/runtime/vm/jit/target-cache.h"
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#include "hphp/runtime/vm/unit.h"
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#include "hphp/system/systemlib.h"
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namespace HPHP {
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RenamedFuncDict::RenamedFuncDict() : m_restrictRenameableFunctions(false) { }
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bool RenamedFuncDict::rename(const StringData* old, const StringData* n3w) {
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assert(isFunctionRenameable(old) ||
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isFunctionRenameable(n3w));
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NamedEntity *oldNe = const_cast<NamedEntity *>(Unit::GetNamedEntity(old));
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NamedEntity *newNe = const_cast<NamedEntity *>(Unit::GetNamedEntity(n3w));
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Func* func = Unit::lookupFunc(oldNe);
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if (!func) {
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// It's the caller's responsibility to ensure that the old function
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// exists.
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not_reached();
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}
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if (!(func->attrs() & AttrDynamicInvoke)) {
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// When EvalJitEnableRenameFunction is false, the translator may wire
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// non-DynamicInvoke Func*'s into the TC. Don't rename functions.
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if (RuntimeOption::EvalJit && !RuntimeOption::EvalJitEnableRenameFunction) {
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raise_error("You must explicitly enable fb_rename_function in the JIT "
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"(-v Eval.JitEnableRenameFunction=true)");
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}
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}
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Func *fnew = Unit::lookupFunc(newNe);
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if (fnew && fnew != func) {
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// To match hphpc, we silently ignore functions defined in user code that
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// have the same name as a function defined in a separable extension
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if (!fnew->isAllowOverride()) {
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raise_error("Function already defined: %s", n3w->data());
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} else {
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return false;
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}
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}
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oldNe->setCachedFunc(nullptr);
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if (UNLIKELY(newNe->m_cachedFuncOffset == 0)) {
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Transl::TargetCache::allocFixedFunction(newNe, false);
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}
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newNe->setCachedFunc(func);
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if (RuntimeOption::EvalJit) {
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Transl::TargetCache::invalidateForRename(old);
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}
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return true;
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}
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bool RenamedFuncDict::isFunctionRenameable(const StringData* name) {
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return !m_restrictRenameableFunctions ||
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mapContains(m_renameableFunctions, name);
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}
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void RenamedFuncDict::addRenameableFunctions(ArrayData* arr) {
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m_restrictRenameableFunctions = true;
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for (ArrayIter iter(arr); iter; ++iter) {
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String name = iter.second().toString();
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if (!name.empty()) {
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m_renameableFunctions.insert(name.get());
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}
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}
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}
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} // HPHP::VM
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