inspector/InjectedScriptBase.cpp

   1 /*
   2  * Copyright (C) 2013 Apple Inc. All rights reserved.
   3  * Copyright (C) 2012 Google Inc. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "config.h"
  33 #include "InjectedScriptBase.h"
  34
  35 #include "DebuggerEvalEnabler.h"
  36 #include "InspectorValues.h"
  37 #include "JSCInlines.h"
  38 #include "JSGlobalObject.h"
  39 #include "ScriptFunctionCall.h"
  40 #include <wtf/text/WTFString.h>
  41
  42 namespace Inspector {
  43
  44 InjectedScriptBase::InjectedScriptBase(const String& name)
  45     : m_name(name)
  46     , m_environment(nullptr)
  47 {
  48 }
  49
  50 InjectedScriptBase::InjectedScriptBase(const String& name, Deprecated::ScriptObject injectedScriptObject, InspectorEnvironment* environment)
  51     : m_name(name)
  52     , m_injectedScriptObject(injectedScriptObject)
  53     , m_environment(environment)
  54 {
  55 }
  56
  57 InjectedScriptBase::~InjectedScriptBase()
  58 {
  59 }
  60
  61 void InjectedScriptBase::initialize(Deprecated::ScriptObject injectedScriptObject, InspectorEnvironment* environment)
  62 {
  63     m_injectedScriptObject = injectedScriptObject;
  64     m_environment = environment;
  65 }
  66
  67 bool InjectedScriptBase::hasAccessToInspectedScriptState() const
  68 {
  69     return m_environment && m_environment->canAccessInspectedScriptState(m_injectedScriptObject.scriptState());
  70 }
  71
  72 const Deprecated::ScriptObject& InjectedScriptBase::injectedScriptObject() const
  73 {
  74     return m_injectedScriptObject;
  75 }
  76
  77 Deprecated::ScriptValue InjectedScriptBase::callFunctionWithEvalEnabled(Deprecated::ScriptFunctionCall& function, bool& hadException) const
  78 {
  79     if (m_environment)
  80         m_environment->willCallInjectedScriptFunction(m_injectedScriptObject.scriptState(), name(), 1);
  81
  82     JSC::ExecState* scriptState = m_injectedScriptObject.scriptState();
  83     Deprecated::ScriptValue resultValue;
  84
  85     {
  86         JSC::DebuggerEvalEnabler evalEnabler(scriptState);
  87         resultValue = function.call(hadException);
  88     }
  89
  90     if (m_environment)
  91         m_environment->didCallInjectedScriptFunction(m_injectedScriptObject.scriptState());
  92
  93     return resultValue;
  94 }
  95
  96 void InjectedScriptBase::makeCall(Deprecated::ScriptFunctionCall& function, RefPtr<InspectorValue>* result)
  97 {
  98     if (hasNoValue() || !hasAccessToInspectedScriptState()) {
  99         *result = InspectorValue::null();
 100         return;
 101     }
 102
 103     bool hadException = false;
 104     Deprecated::ScriptValue resultValue = callFunctionWithEvalEnabled(function, hadException);
 105
 106     ASSERT(!hadException);
 107     if (!hadException) {
 108         *result = resultValue.toInspectorValue(m_injectedScriptObject.scriptState());
 109         if (!*result)
 110             *result = InspectorString::create(String::format("Object has too long reference chain (must not be longer than %d)", InspectorValue::maxDepth));
 111     } else
 112         *result = InspectorString::create("Exception while making a call.");
 113 }
 114
 115 void InjectedScriptBase::makeEvalCall(ErrorString& errorString, Deprecated::ScriptFunctionCall& function, RefPtr<Protocol::Runtime::RemoteObject>* objectResult, Protocol::OptOutput<bool>* wasThrown, Protocol::OptOutput<int>* savedResultIndex)
 116 {
 117     RefPtr<InspectorValue> result;
 118     makeCall(function, &result);
 119     if (!result) {
 120         errorString = ASCIILiteral("Internal error: result value is empty");
 121         return;
 122     }
 123
 124     if (result->type() == InspectorValue::Type::String) {
 125         result->asString(errorString);
 126         ASSERT(errorString.length());
 127         return;
 128     }
 129
 130     RefPtr<InspectorObject> resultTuple;
 131     if (!result->asObject(resultTuple)) {
 132         errorString = ASCIILiteral("Internal error: result is not an Object");
 133         return;
 134     }
 135
 136     RefPtr<InspectorObject> resultObject;
 137     if (!resultTuple->getObject(ASCIILiteral("result"), resultObject)) {
 138         errorString = ASCIILiteral("Internal error: result is not a pair of value and wasThrown flag");
 139         return;
 140     }
 141
 142     bool wasThrownValue = false;
 143     if (!resultTuple->getBoolean(ASCIILiteral("wasThrown"), wasThrownValue)) {
 144         errorString = ASCIILiteral("Internal error: result is not a pair of value and wasThrown flag");
 145         return;
 146     }
 147
 148     *objectResult = BindingTraits<Protocol::Runtime::RemoteObject>::runtimeCast(resultObject);
 149     *wasThrown = wasThrownValue;
 150
 151     if (savedResultIndex) {
 152         int savedIndex = 0;
 153         if (resultTuple->getInteger(ASCIILiteral("savedResultIndex"), savedIndex))
 154             *savedResultIndex = savedIndex;
 155     }
 156 }
 157
 158 } // namespace Inspector
 159