While it supports multiple backends, we opted to utilize the so-called Optimizing backend that has a single intermediate representation (IR) and is deemed default since Android 6. A few words on dex2oatĪndroid's novel on-device compiler is used to compile apps and system libraries from dalvik bytecode to the platform's native code. The deployment options described in the ARTist section below give an intuition why this is important.
Dmmd reconnect official art code#
In fact we are only modifying code that relates to the compiler but no internals of the actual runtime environment, since in the end we deploy ARTist with the compiler binary but never change other parts of the runtime on the device (e.g., the art binary). We disguise our instrumentation modules as optimization passes so in this file we are just adding them to the list so the optimization framework takes care of executing them.
: ARTist and its modules are initialized early on.Here is a quick primer at the two files where our major changes reside: Because this repository takes care of the differences between Android versions, the ARTist codebase can stay mostly version-independent.Ĭurrently, there is only a small number of places where we added code to ART. The ARTist repository is added as a submodule under compiler/optimizing/artist and provides the needed code for the integration. Still, as ART is an ever-evolving project, we need to maintain at least one branch per version.Ĭurrently, we support the following Android versions: Name We try to keep the integration code as small as possible to ease the process of adding support for new versions and stay robust to compiler changes. For more information about ARTist, see the corresponding section below. This repository is a fork of AOSP's ART project, Androids default runtime since Lollipop (5.0), which integrates the ARTist instrumentation framework into ART's dex2oat on-device compiler to allow for instrumentation of apps and middleware components during compilation. ART - The Android Runtime (Fork for Project ARTist)
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