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AndroidContext: Explicitly hand through on Intent-Start (coarse) 

PARTIALLY:
Android-Context is explicitly assigned when Intents are started.

Not all types of Context are handled correctly yet.
This commit is contained in:
Tobias Blaschke 2014-02-02 22:03:15 +01:00 committed by Juergen Graf
parent 9c8e2e7c00
commit 80c022f525
2 changed files with 175 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

130
com.ibm.wala.dalvik/src/com/ibm/wala/dalvik/ipa/callgraph/propagation/cfa/AndroidContext.java Normal file
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@ -0,0 +1,130 @@
/*
* Copyright (c) 2013,
* Tobias Blaschke <code@tobiasblaschke.de>
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The names of the contributors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.ibm.wala.dalvik.ipa.callgraph.propagation.cfa;
import com.ibm.wala.dalvik.ipa.callgraph.propagation.cfa.Intent;
import com.ibm.wala.ipa.callgraph.propagation.cfa.CallerContext;
import com.ibm.wala.dalvik.util.AndroidTypes;
import com.ibm.wala.ipa.callgraph.CGNode;
import com.ibm.wala.ipa.callgraph.Context;
import com.ibm.wala.ipa.callgraph.ContextItem;
import com.ibm.wala.ipa.callgraph.ContextKey;
/**
* Fetches an android/content/Context.
*
* @author Tobias Blaschke <code@tobiasblaschke.de>
* @since 2013-10-14
*/
public class AndroidContext implements Context {
/**
* Key into the Context that represents the AndroidContext.
*/
public static final ContextKey ANDROID_CONTEXT_KEY = new ContextKey() {};
private final AndroidTypes.AndroidContextType aCtxT;
private final Context parent;
public AndroidContext(Context parent, AndroidTypes.AndroidContextType aCtxT) {
this.parent = parent;
this.aCtxT = aCtxT;
}
public AndroidTypes.AndroidContextType getContextType() {
return this.aCtxT;
}
/**
* Looks up a ContextKey in the Context.
*
* @return an Intent or parent-managed object.
* @throws IllegalArgumentException if the name is null.
*/
@Override
public ContextItem get (ContextKey name) {
if (name == null) {
throw new IllegalArgumentException("name is null");
}
if (name.equals(ANDROID_CONTEXT_KEY)) {
return null; // TODO
} else if(this.parent != null) {
return this.parent.get(name);
} else {
return null;
}
}
/**
* Special equality: Object may be equal to an object without associated Intent.
*/
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (obj instanceof AndroidContext) {
AndroidContext other = (AndroidContext) obj;
if (this.aCtxT.equals(other.aCtxT)) {
if (this.parent != null) {
return this.parent.equals(other.parent);
} else {
return other.parent == null;
}
} else {
return false;
}
} else {
if (this.parent != null) {
// TODO: do we really want this?
return this.parent.equals(obj);
} else {
return false;
}
}
}
@Override
public int hashCode() {
// TODO: do we want to "clash" with the parent here?
return 71891 * this.aCtxT.hashCode();
}
@Override
public String toString() {
if (this.parent == null) {
return "AndroidContext: " + this.aCtxT;
} else {
return "AndroidContext: " + this.aCtxT + ", parent: " + this.parent;
}
}
}

45
com.ibm.wala.dalvik/src/com/ibm/wala/dalvik/ipa/callgraph/propagation/cfa/IntentContextSelector.java
View File

@ -35,6 +35,7 @@ import com.ibm.wala.ipa.callgraph.ContextSelector;
import com.ibm.wala.dalvik.ipa.callgraph.propagation.cfa.Intent;
import com.ibm.wala.dalvik.ipa.callgraph.propagation.cfa.IntentContext;
import com.ibm.wala.dalvik.ipa.callgraph.propagation.cfa.AndroidContext;
import com.ibm.wala.dalvik.ipa.callgraph.propagation.cfa.IntentContextInterpreter;
import com.ibm.wala.classLoader.CallSiteReference;
@ -96,6 +97,7 @@ public class IntentContextSelector implements ContextSelector {
private final ContextSelector parent;
private final IntentStarters intentStarters;
private final Map<InstanceKey, Intent> seen;
private final Map<InstanceKey, AndroidContext> seenContext;
public IntentContextSelector(final IClassHierarchy cha) {
this(null, cha);
@ -107,6 +109,7 @@ public class IntentContextSelector implements ContextSelector {
public IntentContextSelector(final ContextSelector parent, final IClassHierarchy cha) {
this.parent = parent;
this.seen = HashMapFactory.make();
this.seenContext = HashMapFactory.make();
this.intentStarters = new IntentStarters(cha);
}
@ -139,6 +142,12 @@ public class IntentContextSelector implements ContextSelector {
{
final InstanceKey self = actualParameters[0];
assert (self != null) : "This-Pointer was not marked as relevant!";
if (seenContext.containsKey(self)) {
ctx = new AndroidContext(ctx, seenContext.get(self).getContextType());
} else {
logger.warn("No Android-Context seen for {}", caller);
}
}
// Seach intent and attach as context
@ -287,6 +296,42 @@ public class IntentContextSelector implements ContextSelector {
logger.warn("Can't extract Info from Intent-Constructor: {} (not implemented)", site);
//System.out.println("\t\tFOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO: " + callee.getSelector()); // XXX
}
} else if (callee.isInit() && callee.getDeclaringClass().getName().equals(AndroidTypes.IntentSenderName)) {
// TODO
} else if (site.isSpecial() && callee.getDeclaringClass().getName().equals(
AndroidTypes.ContextWrapperName)) {
final InstanceKey baseKey = actualParameters[1];
final InstanceKey wrapperKey = actualParameters[0];
logger.debug("Handling ContextWrapper(Context base)");
if (seenContext.containsKey(baseKey)) {
seenContext.put(wrapperKey, seenContext.get(baseKey));
} else {
if (baseKey == null) {
logger.warn("Got baseKey as 'null'. Obviously can't handle this. Caller was: {}", caller.getMethod());
} else {
logger.warn("ContextWrapper: No AndroidContext was seen for baseKey");
}
}
} else if ((site.isSpecial() && callee.getDeclaringClass().getName().equals(
AndroidTypes.ContextImplName))) {
final InstanceKey self = actualParameters[0];
seenContext.put(self, new AndroidContext(ctx, AndroidTypes.AndroidContextType.CONTEXT_IMPL));
} else if (callee.getDeclaringClass().getName().equals(AndroidTypes.ContextWrapperName) &&
callee.getSelector().equals(Selector.make("attachBaseContext(Landroid/content/Context;)V"))) {
final InstanceKey baseKey = actualParameters[1];
final InstanceKey wrapperKey = actualParameters[0];
logger.debug("Handling ContextWrapper.attachBaseContext(base)");
if (seenContext.containsKey(baseKey)) {
seenContext.put(wrapperKey, seenContext.get(baseKey));
} else {
if (baseKey == null) {
logger.warn("Got baseKey as 'null'. Obviously can't handle this. Caller was: {}", caller.getMethod());
} else {
logger.warn("ContextWrapper: No AndroidContext was seen for baseKey");
}
}
}
return ctx;