Add onMemoryDump to GrContext

Adds an entry point to GrContext to allow enumeration and tracing of GPU resources
via the newly added SkTraceMemoryDump.

Plan is for Chrome to call this on each of its GrContexts.

Dumps both the total size of GPU resources, as well as the total purgeable size.

BUG=526261

Review URL: https://codereview.chromium.org/1313743002

1 files changed, 18 insertions, 0 deletions

diff --git a/src/gpu/GrGpuResource.cpp b/src/gpu/GrGpuResource.cpp
index df8301c506..f8cb529314 100644
--- a/src/gpu/GrGpuResource.cpp
+++ b/src/gpu/GrGpuResource.cpp
@@ -11,6 +11,7 @@
 #include "GrResourceCache.h"
 #include "GrGpu.h"
 #include "GrGpuResourcePriv.h"
+#include "SkTraceMemoryDump.h"
 
 static inline GrResourceCache* get_resource_cache(GrGpu* gpu) {
     SkASSERT(gpu);
@@ -52,6 +53,23 @@ void GrGpuResource::abandon() {
     fGpuMemorySize = 0;
 }
 
+void GrGpuResource::dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const {
+    // Dump resource as "skia/gpu_resources/resource_#".
+    SkString dumpName("skia/gpu_resources/resource_");
+    dumpName.appendS32(this->getUniqueID());
+
+    traceMemoryDump->dumpNumericValue(dumpName.c_str(), "size", "bytes", this->gpuMemorySize());
+
+    if (this->isPurgeable()) {
+        traceMemoryDump->dumpNumericValue(dumpName.c_str(), "purgeable_size", "bytes",
+                                          this->gpuMemorySize());
+    }
+
+    // Call setMemoryBacking to allow sub-classes with implementation specific backings (such as GL
+    // objects) to provide additional information.
+    this->setMemoryBacking(traceMemoryDump, dumpName);
+}
+
 const SkData* GrGpuResource::setCustomData(const SkData* data) {
     SkSafeRef(data);
     fData.reset(data);