Fix issue #2048263: More debugging information

We now hopefully do better about generating the anr reports, and include
information about the malloc loaded assets in meminfo.

include/utils/Asset.h

@@ -45,6 +45,7 @@ public:
     virtual ~Asset(void);
 
     static int32_t getGlobalCount();
+    static String8 getAssetAllocations();
     
     /* used when opening an asset */
     typedef enum AccessMode {
@@ -109,6 +110,12 @@ public:
      */
     virtual int openFileDescriptor(off_t* outStart, off_t* outLength) const = 0;
     
+    /*
+     * Return whether this asset's buffer is allocated in RAM (not mmapped).
+     * Note: not virtual so it is safe to call even when being destroyed.
+     */
+    virtual bool isAllocated(void) const { return false; }
+    
     /*
      * Get a string identifying the asset's source.  This might be a full
      * path, it might be a colon-separated list of identifiers.
@@ -197,6 +204,9 @@ private:
 
     AccessMode  mAccessMode;        // how the asset was opened
     String8    mAssetSource;       // debug string
+    
+    Asset*		mNext;				// linked list.
+    Asset*		mPrev;
 };
 
 
@@ -239,6 +249,7 @@ public:
     virtual off_t getLength(void) const { return mLength; }
     virtual off_t getRemainingLength(void) const { return mLength-mOffset; }
     virtual int openFileDescriptor(off_t* outStart, off_t* outLength) const;
+    virtual bool isAllocated(void) const { return mBuf != NULL; }
 
 private:
     off_t       mStart;         // absolute file offset of start of chunk
@@ -295,6 +306,7 @@ public:
     virtual off_t getLength(void) const { return mUncompressedLen; }
     virtual off_t getRemainingLength(void) const { return mUncompressedLen-mOffset; }
     virtual int openFileDescriptor(off_t* outStart, off_t* outLength) const { return -1; }
+    virtual bool isAllocated(void) const { return mBuf != NULL; }
 
 private:
     off_t       mStart;         // offset to start of compressed data

libs/utils/Asset.cpp

@@ -27,6 +27,7 @@
 #include <utils/ZipUtils.h>
 #include <utils/ZipFileRO.h>
 #include <utils/Log.h>
+#include <utils/threads.h>
 
 #include <string.h>
 #include <memory.h>
@@ -40,24 +41,71 @@ using namespace android;
 # define O_BINARY 0
 #endif
 
-static volatile int32_t gCount = 0;
+static Mutex gAssetLock;
+static int32_t gCount = 0;
+static Asset* gHead = NULL;
+static Asset* gTail = NULL;
 
 int32_t Asset::getGlobalCount()
 {
+    AutoMutex _l(gAssetLock);
     return gCount;
 }
 
+String8 Asset::getAssetAllocations()
+{
+    AutoMutex _l(gAssetLock);
+    String8 res;
+    Asset* cur = gHead;
+    while (cur != NULL) {
+        if (cur->isAllocated()) {
+            res.append("    ");
+            res.append(cur->getAssetSource());
+            off_t size = (cur->getLength()+512)/1024;
+            char buf[64];
+            sprintf(buf, ": %dK\n", (int)size);
+            res.append(buf);
+        }
+        cur = cur->mNext;
+    }
+    
+    return res;
+}
+
 Asset::Asset(void)
     : mAccessMode(ACCESS_UNKNOWN)
 {
-    int count = android_atomic_inc(&gCount)+1;
-    //LOGI("Creating Asset %p #%d\n", this, count);
+    AutoMutex _l(gAssetLock);
+    gCount++;
+    mNext = mPrev = NULL;
+    if (gTail == NULL) {
+        gHead = gTail = this;
+  	} else {
+  	    mPrev = gTail;
+  	    gTail->mNext = this;
+  	    gTail = this;
+  	}
+    //LOGI("Creating Asset %p #%d\n", this, gCount);
 }
 
 Asset::~Asset(void)
 {
-    int count = android_atomic_dec(&gCount);
-    //LOGI("Destroying Asset in %p #%d\n", this, count);
+    AutoMutex _l(gAssetLock);
+	gCount--;
+    if (gHead == this) {
+        gHead = mNext;
+    }
+    if (gTail == this) {
+        gTail = mPrev;
+    }
+    if (mNext != NULL) {
+        mNext->mPrev = mPrev;
+    }
+    if (mPrev != NULL) {
+        mPrev->mNext = mNext;
+    }
+    mNext = mPrev = NULL;
+    //LOGI("Destroying Asset in %p #%d\n", this, gCount);
 }
 
 /*