diff --git a/include/gui/BufferQueue.h b/include/gui/BufferQueue.h
index 6c1b691..34264bf 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -229,7 +229,7 @@
 
     // dump our state in a String
     virtual void dump(String8& result) const;
-    virtual void dump(String8& result, const char* prefix, char* buffer, size_t SIZE) const;
+    virtual void dump(String8& result, const char* prefix) const;
 
     // public facing structure for BufferSlot
     struct BufferItem {
diff --git a/include/gui/ConsumerBase.h b/include/gui/ConsumerBase.h
index 8a7545d..6250d8f 100644
--- a/include/gui/ConsumerBase.h
+++ b/include/gui/ConsumerBase.h
@@ -73,7 +73,7 @@
     // their state to the dump by overriding the dumpLocked method, which is
     // called by these methods after locking the mutex.
     void dump(String8& result) const;
-    void dump(String8& result, const char* prefix, char* buffer, size_t SIZE) const;
+    void dump(String8& result, const char* prefix) const;
 
     // setFrameAvailableListener sets the listener object that will be notified
     // when a new frame becomes available.
@@ -143,8 +143,7 @@
     // should call ConsumerBase::dumpLocked.
     //
     // This method must be called with mMutex locked.
-    virtual void dumpLocked(String8& result, const char* prefix, char* buffer,
-            size_t size) const;
+    virtual void dumpLocked(String8& result, const char* prefix) const;
 
     // acquireBufferLocked fetches the next buffer from the BufferQueue and
     // updates the buffer slot for the buffer returned.
diff --git a/include/gui/GLConsumer.h b/include/gui/GLConsumer.h
index 3b8dd77..12796c5 100644
--- a/include/gui/GLConsumer.h
+++ b/include/gui/GLConsumer.h
@@ -233,8 +233,7 @@
 
     // dumpLocked overrides the ConsumerBase method to dump GLConsumer-
     // specific info in addition to the ConsumerBase behavior.
-    virtual void dumpLocked(String8& result, const char* prefix, char* buffer,
-           size_t size) const;
+    virtual void dumpLocked(String8& result, const char* prefix) const;
 
     // acquireBufferLocked overrides the ConsumerBase method to update the
     // mEglSlots array in addition to the ConsumerBase behavior.
diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index b4c7231..942151f 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -707,36 +707,29 @@
     return err;
 }
 
-void BufferQueue::dump(String8& result) const
-{
-    char buffer[1024];
-    BufferQueue::dump(result, "", buffer, 1024);
+void BufferQueue::dump(String8& result) const {
+    BufferQueue::dump(result, "");
 }
 
-void BufferQueue::dump(String8& result, const char* prefix,
-        char* buffer, size_t SIZE) const
-{
+void BufferQueue::dump(String8& result, const char* prefix) const {
     Mutex::Autolock _l(mMutex);
 
     String8 fifo;
     int fifoSize = 0;
     Fifo::const_iterator i(mQueue.begin());
     while (i != mQueue.end()) {
-       snprintf(buffer, SIZE, "%02d ", *i++);
-       fifoSize++;
-       fifo.append(buffer);
+        fifo.appendFormat("%02d ", *i++);
+        fifoSize++;
     }
 
     int maxBufferCount = getMaxBufferCountLocked();
 
-    snprintf(buffer, SIZE,
+    result.appendFormat(
             "%s-BufferQueue maxBufferCount=%d, mSynchronousMode=%d, default-size=[%dx%d], "
             "default-format=%d, transform-hint=%02x, FIFO(%d)={%s}\n",
             prefix, maxBufferCount, mSynchronousMode, mDefaultWidth,
             mDefaultHeight, mDefaultBufferFormat, mTransformHint,
             fifoSize, fifo.string());
-    result.append(buffer);
-
 
     struct {
         const char * operator()(int state) const {
@@ -752,7 +745,7 @@
 
     for (int i=0 ; i<maxBufferCount ; i++) {
         const BufferSlot& slot(mSlots[i]);
-        snprintf(buffer, SIZE,
+        result.appendFormat(
                 "%s%s[%02d] "
                 "state=%-8s, crop=[%d,%d,%d,%d], "
                 "xform=0x%02x, time=%#llx, scale=%s",
@@ -762,15 +755,13 @@
                 slot.mCrop.bottom, slot.mTransform, slot.mTimestamp,
                 scalingModeName(slot.mScalingMode)
         );
-        result.append(buffer);
 
         const sp<GraphicBuffer>& buf(slot.mGraphicBuffer);
         if (buf != NULL) {
-            snprintf(buffer, SIZE,
+            result.appendFormat(
                     ", %p [%4ux%4u:%4u,%3X]",
                     buf->handle, buf->width, buf->height, buf->stride,
                     buf->format);
-            result.append(buffer);
         }
         result.append("\n");
     }
diff --git a/libs/gui/ConsumerBase.cpp b/libs/gui/ConsumerBase.cpp
index 4937b17..8d911c9 100644
--- a/libs/gui/ConsumerBase.cpp
+++ b/libs/gui/ConsumerBase.cpp
@@ -165,23 +165,19 @@
 }
 
 void ConsumerBase::dump(String8& result) const {
-    char buffer[1024];
-    dump(result, "", buffer, 1024);
+    dump(result, "");
 }
 
-void ConsumerBase::dump(String8& result, const char* prefix,
-        char* buffer, size_t size) const {
+void ConsumerBase::dump(String8& result, const char* prefix) const {
     Mutex::Autolock _l(mMutex);
-    dumpLocked(result, prefix, buffer, size);
+    dumpLocked(result, prefix);
 }
 
-void ConsumerBase::dumpLocked(String8& result, const char* prefix,
-        char* buffer, size_t SIZE) const {
-    snprintf(buffer, SIZE, "%smAbandoned=%d\n", prefix, int(mAbandoned));
-    result.append(buffer);
+void ConsumerBase::dumpLocked(String8& result, const char* prefix) const {
+    result.appendFormat("%smAbandoned=%d\n", prefix, int(mAbandoned));
 
     if (!mAbandoned) {
-        mBufferQueue->dump(result, prefix, buffer, SIZE);
+        mBufferQueue->dump(result, prefix);
     }
 }
 
diff --git a/libs/gui/GLConsumer.cpp b/libs/gui/GLConsumer.cpp
index f8f1241..0d7c72e 100644
--- a/libs/gui/GLConsumer.cpp
+++ b/libs/gui/GLConsumer.cpp
@@ -884,18 +884,16 @@
     return mBufferQueue->setSynchronousMode(enabled);
 }
 
-void GLConsumer::dumpLocked(String8& result, const char* prefix,
-        char* buffer, size_t size) const
+void GLConsumer::dumpLocked(String8& result, const char* prefix) const
 {
-    snprintf(buffer, size,
+    result.appendFormat(
        "%smTexName=%d mCurrentTexture=%d\n"
        "%smCurrentCrop=[%d,%d,%d,%d] mCurrentTransform=%#x\n",
        prefix, mTexName, mCurrentTexture, prefix, mCurrentCrop.left,
        mCurrentCrop.top, mCurrentCrop.right, mCurrentCrop.bottom,
        mCurrentTransform);
-    result.append(buffer);
 
-    ConsumerBase::dumpLocked(result, prefix, buffer, size);
+    ConsumerBase::dumpLocked(result, prefix);
 }
 
 static void mtxMul(float out[16], const float a[16], const float b[16]) {
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 68b0b7f..42b30cc 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -424,9 +424,9 @@
     mFrame = frame;
 }
 
-void DisplayDevice::dump(String8& result, char* buffer, size_t SIZE) const {
+void DisplayDevice::dump(String8& result) const {
     const Transform& tr(mGlobalTransform);
-    snprintf(buffer, SIZE,
+    result.appendFormat(
         "+ DisplayDevice: %s\n"
         "   type=%x, hwcId=%d, layerStack=%u, (%4dx%4d), ANativeWindow=%p, orient=%2d (type=%08x), "
         "flips=%u, isSecure=%d, secureVis=%d, acquired=%d, numLayers=%u\n"
@@ -443,8 +443,6 @@
         tr[0][1], tr[1][1], tr[2][1],
         tr[0][2], tr[1][2], tr[2][2]);
 
-    result.append(buffer);
-
     String8 surfaceDump;
     mDisplaySurface->dump(surfaceDump);
     result.append(surfaceDump);
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index 377d924..047eecd 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -153,7 +153,7 @@
      * Debugging
      */
     uint32_t getPageFlipCount() const;
-    void dump(String8& result, char* buffer, size_t SIZE) const;
+    void dump(String8& result) const;
 
 private:
     /*
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
index 54a3ce8..8b454ce 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
@@ -175,11 +175,10 @@
     ConsumerBase::dump(result);
 }
 
-void FramebufferSurface::dumpLocked(String8& result, const char* prefix,
-            char* buffer, size_t SIZE) const
+void FramebufferSurface::dumpLocked(String8& result, const char* prefix) const
 {
     mHwc.fbDump(result);
-    ConsumerBase::dumpLocked(result, prefix, buffer, SIZE);
+    ConsumerBase::dumpLocked(result, prefix);
 }
 
 // ----------------------------------------------------------------------------
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.h b/services/surfaceflinger/DisplayHardware/FramebufferSurface.h
index 2fde789..c86e9ae 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.h
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.h
@@ -55,8 +55,7 @@
     virtual void onFrameAvailable();
     virtual void freeBufferLocked(int slotIndex);
 
-    virtual void dumpLocked(String8& result, const char* prefix,
-            char* buffer, size_t SIZE) const;
+    virtual void dumpLocked(String8& result, const char* prefix) const;
 
     // nextBuffer waits for and then latches the next buffer from the
     // BufferQueue and releases the previously latched buffer to the
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 3f00f07..6bdccb9 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -546,9 +546,6 @@
         // triggers a Surface::queueBuffer()  on some
         // devices (!?) -- log and ignore.
         ALOGE("HWComposer: framebufferTarget is null");
-//        CallStack stack;
-//        stack.update();
-//        stack.dump("");
         return NO_ERROR;
     }
 
@@ -958,7 +955,7 @@
     return getLayerIterator(id, numLayers);
 }
 
-void HWComposer::dump(String8& result, char* buffer, size_t SIZE) const {
+void HWComposer::dump(String8& result) const {
     if (mHwc) {
         result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
         result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
@@ -1026,6 +1023,8 @@
     }
 
     if (mHwc && mHwc->dump) {
+        const size_t SIZE = 4096;
+        char buffer[SIZE];
         mHwc->dump(mHwc, buffer, SIZE);
         result.append(buffer);
     }
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 604de38..a20da08 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -275,7 +275,7 @@
     friend class VSyncThread;
 
     // for debugging ----------------------------------------------------------
-    void dump(String8& out, char* scratch, size_t SIZE) const;
+    void dump(String8& out) const;
 
 private:
     void loadHwcModule();
diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index 4d0fc79..4126c8a 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -320,7 +320,7 @@
     mDebugVsyncEnabled = false;
 }
 
-void EventThread::dump(String8& result, char* buffer, size_t SIZE) const {
+void EventThread::dump(String8& result) const {
     Mutex::Autolock _l(mLock);
     result.appendFormat("VSYNC state: %s\n",
             mDebugVsyncEnabled?"enabled":"disabled");
diff --git a/services/surfaceflinger/EventThread.h b/services/surfaceflinger/EventThread.h
index 1934f98..f6bd676 100644
--- a/services/surfaceflinger/EventThread.h
+++ b/services/surfaceflinger/EventThread.h
@@ -84,7 +84,7 @@
     Vector< sp<EventThread::Connection> > waitForEvent(
             DisplayEventReceiver::Event* event);
 
-    void dump(String8& result, char* buffer, size_t SIZE) const;
+    void dump(String8& result) const;
 
 private:
     virtual bool        threadLoop();
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 4779804..91113c9 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1178,21 +1178,19 @@
 // debugging
 // ----------------------------------------------------------------------------
 
-void Layer::dump(String8& result, char* buffer, size_t SIZE) const
+void Layer::dump(String8& result) const
 {
     const Layer::State& s(drawingState());
 
-    snprintf(buffer, SIZE,
+    result.appendFormat(
             "+ %s %p (%s)\n",
             getTypeId(), this, getName().string());
-    result.append(buffer);
 
     s.activeTransparentRegion.dump(result, "transparentRegion");
     visibleRegion.dump(result, "visibleRegion");
     sp<Client> client(mClientRef.promote());
 
-    snprintf(buffer, SIZE,
-            "      "
+    result.appendFormat(            "      "
             "layerStack=%4d, z=%9d, pos=(%g,%g), size=(%4d,%4d), crop=(%4d,%4d,%4d,%4d), "
             "isOpaque=%1d, invalidate=%1d, "
             "alpha=0x%02x, flags=0x%08x, tr=[%.2f, %.2f][%.2f, %.2f]\n"
@@ -1205,7 +1203,6 @@
             s.transform[0][0], s.transform[0][1],
             s.transform[1][0], s.transform[1][1],
             client.get());
-    result.append(buffer);
 
     sp<const GraphicBuffer> buf0(mActiveBuffer);
     uint32_t w0=0, h0=0, s0=0, f0=0;
@@ -1215,26 +1212,24 @@
         s0 = buf0->getStride();
         f0 = buf0->format;
     }
-    snprintf(buffer, SIZE,
+    result.appendFormat(
             "      "
             "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X],"
             " queued-frames=%d, mRefreshPending=%d\n",
             mFormat, w0, h0, s0,f0,
             mQueuedFrames, mRefreshPending);
 
-    result.append(buffer);
-
     if (mSurfaceFlingerConsumer != 0) {
-        mSurfaceFlingerConsumer->dump(result, "            ", buffer, SIZE);
+        mSurfaceFlingerConsumer->dump(result, "            ");
     }
 }
 
 
-void Layer::shortDump(String8& result, char* scratch, size_t size) const {
-    Layer::dump(result, scratch, size);
+void Layer::shortDump(String8& result) const {
+    Layer::dump(result);
 }
 
-void Layer::dumpStats(String8& result, char* buffer, size_t SIZE) const {
+void Layer::dumpStats(String8& result) const {
     mFrameTracker.dump(result);
 }
 
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 2765db1..2c06f1a 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -304,9 +304,9 @@
 
 
     /* always call base class first */
-    virtual void dump(String8& result, char* scratch, size_t size) const;
-    virtual void shortDump(String8& result, char* scratch, size_t size) const;
-    virtual void dumpStats(String8& result, char* buffer, size_t SIZE) const;
+    virtual void dump(String8& result) const;
+    virtual void shortDump(String8& result) const;
+    virtual void dumpStats(String8& result) const;
     virtual void clearStats();
 
 protected:
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index e647275..dc73fe7 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2141,19 +2141,15 @@
 
 status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
 {
-    const size_t SIZE = 4096;
-    char buffer[SIZE];
     String8 result;
 
-
     IPCThreadState* ipc = IPCThreadState::self();
     const int pid = ipc->getCallingPid();
     const int uid = ipc->getCallingUid();
     if ((uid != AID_SHELL) &&
             !PermissionCache::checkPermission(sDump, pid, uid)) {
-        snprintf(buffer, SIZE, "Permission Denial: "
+        result.appendFormat("Permission Denial: "
                 "can't dump SurfaceFlinger from pid=%d, uid=%d\n", pid, uid);
-        result.append(buffer);
     } else {
         // Try to get the main lock, but don't insist if we can't
         // (this would indicate SF is stuck, but we want to be able to
@@ -2164,10 +2160,9 @@
         }
         const bool locked(retry >= 0);
         if (!locked) {
-            snprintf(buffer, SIZE,
+            result.append(
                     "SurfaceFlinger appears to be unresponsive, "
                     "dumping anyways (no locks held)\n");
-            result.append(buffer);
         }
 
         bool dumpAll = true;
@@ -2177,27 +2172,27 @@
             if ((index < numArgs) &&
                     (args[index] == String16("--list"))) {
                 index++;
-                listLayersLocked(args, index, result, buffer, SIZE);
+                listLayersLocked(args, index, result);
                 dumpAll = false;
             }
 
             if ((index < numArgs) &&
                     (args[index] == String16("--latency"))) {
                 index++;
-                dumpStatsLocked(args, index, result, buffer, SIZE);
+                dumpStatsLocked(args, index, result);
                 dumpAll = false;
             }
 
             if ((index < numArgs) &&
                     (args[index] == String16("--latency-clear"))) {
                 index++;
-                clearStatsLocked(args, index, result, buffer, SIZE);
+                clearStatsLocked(args, index, result);
                 dumpAll = false;
             }
         }
 
         if (dumpAll) {
-            dumpAllLocked(result, buffer, SIZE);
+            dumpAllLocked(args, index, result);
         }
 
         if (locked) {
@@ -2209,19 +2204,18 @@
 }
 
 void SurfaceFlinger::listLayersLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE) const
+        String8& result) const
 {
     const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
     const size_t count = currentLayers.size();
     for (size_t i=0 ; i<count ; i++) {
         const sp<Layer>& layer(currentLayers[i]);
-        snprintf(buffer, SIZE, "%s\n", layer->getName().string());
-        result.append(buffer);
+        result.appendFormat("%s\n", layer->getName().string());
     }
 }
 
 void SurfaceFlinger::dumpStatsLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE) const
+        String8& result) const
 {
     String8 name;
     if (index < args.size()) {
@@ -2241,14 +2235,14 @@
         for (size_t i=0 ; i<count ; i++) {
             const sp<Layer>& layer(currentLayers[i]);
             if (name == layer->getName()) {
-                layer->dumpStats(result, buffer, SIZE);
+                layer->dumpStats(result);
             }
         }
     }
 }
 
 void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE)
+        String8& result)
 {
     String8 name;
     if (index < args.size()) {
@@ -2288,8 +2282,8 @@
     result.append(config);
 }
 
-void SurfaceFlinger::dumpAllLocked(
-        String8& result, char* buffer, size_t SIZE) const
+void SurfaceFlinger::dumpAllLocked(const Vector<String16>& args, size_t& index,
+        String8& result) const
 {
     // figure out if we're stuck somewhere
     const nsecs_t now = systemTime();
@@ -2316,56 +2310,46 @@
      */
     const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
     const size_t count = currentLayers.size();
-    snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
-    result.append(buffer);
+    result.appendFormat("Visible layers (count = %d)\n", count);
     for (size_t i=0 ; i<count ; i++) {
         const sp<Layer>& layer(currentLayers[i]);
-        layer->dump(result, buffer, SIZE);
+        layer->dump(result);
     }
 
     /*
      * Dump Display state
      */
 
-    snprintf(buffer, SIZE, "Displays (%d entries)\n", mDisplays.size());
-    result.append(buffer);
+    result.appendFormat("Displays (%d entries)\n", mDisplays.size());
     for (size_t dpy=0 ; dpy<mDisplays.size() ; dpy++) {
         const sp<const DisplayDevice>& hw(mDisplays[dpy]);
-        hw->dump(result, buffer, SIZE);
+        hw->dump(result);
     }
 
     /*
      * Dump SurfaceFlinger global state
      */
 
-    snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
-    result.append(buffer);
+    result.append("SurfaceFlinger global state:\n");
 
     HWComposer& hwc(getHwComposer());
     sp<const DisplayDevice> hw(getDefaultDisplayDevice());
     const GLExtensions& extensions(GLExtensions::getInstance());
 
-    snprintf(buffer, SIZE, "EGL implementation : %s\n",
-            eglQueryStringImplementationANDROID(mEGLDisplay, EGL_VERSION));
-    result.append(buffer);
-    snprintf(buffer, SIZE, "%s\n",
+    result.appendFormat("EGL implementation : %s\n%s\n",
+            eglQueryStringImplementationANDROID(mEGLDisplay, EGL_VERSION),
             eglQueryStringImplementationANDROID(mEGLDisplay, EGL_EXTENSIONS));
-    result.append(buffer);
 
-    snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
+    result.appendFormat("GLES: %s, %s, %s\n",
             extensions.getVendor(),
             extensions.getRenderer(),
             extensions.getVersion());
-    result.append(buffer);
-    snprintf(buffer, SIZE, "%s\n", extensions.getExtension());
-    result.append(buffer);
+    result.appendFormat("%s\n", extensions.getExtension());
 
     hw->undefinedRegion.dump(result, "undefinedRegion");
-    snprintf(buffer, SIZE,
-            "  orientation=%d, canDraw=%d\n",
+    result.appendFormat("  orientation=%d, canDraw=%d\n",
             hw->getOrientation(), hw->canDraw());
-    result.append(buffer);
-    snprintf(buffer, SIZE,
+    result.appendFormat(
             "  last eglSwapBuffers() time: %f us\n"
             "  last transaction time     : %f us\n"
             "  transaction-flags         : %08x\n"
@@ -2383,31 +2367,26 @@
             hwc.getDpiY(HWC_DISPLAY_PRIMARY),
             mEGLNativeVisualId,
             !mGpuToCpuSupported);
-    result.append(buffer);
 
-    snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
+    result.appendFormat("  eglSwapBuffers time: %f us\n",
             inSwapBuffersDuration/1000.0);
-    result.append(buffer);
 
-    snprintf(buffer, SIZE, "  transaction time: %f us\n",
+    result.appendFormat("  transaction time: %f us\n",
             inTransactionDuration/1000.0);
-    result.append(buffer);
 
     /*
      * VSYNC state
      */
-    mEventThread->dump(result, buffer, SIZE);
+    mEventThread->dump(result);
 
     /*
      * Dump HWComposer state
      */
-    snprintf(buffer, SIZE, "h/w composer state:\n");
-    result.append(buffer);
-    snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
+    result.append("h/w composer state:\n");
+    result.appendFormat("  h/w composer %s and %s\n",
             hwc.initCheck()==NO_ERROR ? "present" : "not present",
                     (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
-    result.append(buffer);
-    hwc.dump(result, buffer, SIZE);
+    hwc.dump(result);
 
     /*
      * Dump gralloc state
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 739099c..d387a60 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -385,12 +385,13 @@
      * Debugging & dumpsys
      */
     void listLayersLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE) const;
+        String8& result) const;
     void dumpStatsLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE) const;
+        String8& result) const;
     void clearStatsLocked(const Vector<String16>& args, size_t& index,
-        String8& result, char* buffer, size_t SIZE);
-    void dumpAllLocked(String8& result, char* buffer, size_t SIZE) const;
+        String8& result);
+    void dumpAllLocked(const Vector<String16>& args, size_t& index,
+        String8& result) const;
     bool startDdmConnection();
     static void appendSfConfigString(String8& result);