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Summary of high level changes:
- Adds compiler inliner support to identify string init methods
- Adds compiler support (quick & optimizing) with new invoke code path
that calls method off the thread pointer
- Adds thread entrypoints for all string init methods
- Adds map to verifier to log when receiver of string init has been
copied to other registers. used by compiler and interpreter
Change-Id: I797b992a8feb566f9ad73060011ab6f51eb7ce01
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This CL adds quickening support for methods which are interpreted at runtime.
This CL introduces a DEX-to-DEX compiler. A method is now compiled in one of
the two following modes:
- Native compilation: the method is compiled by the Quick or Portable backends.
At runtime, the generated native target-dependent code is executed.
- DEX-to-DEX compilation: the method is executed by the interpreter at runtime.
Its DEX code is compiled so some instructions can be replaced by special
instructions only valid at runtime. No native code is generated.
The quickening adds special instructions to improve runtime performance. They
are "-quick" versions of the following instructions:
- iget/iput
- iget-wide/iput-wide
- iget-object/iput-object
- invoke-virtual/range.
These special instructions cannot be treated by the verifier since they lose
the field/method index referencing the field/method being accessed/invoked.
To prevent this, the DEX-to-DEX compiler is run only on methods of preverified
classes (without verification error at compilation time).
The DEX-to-DEX compiler implements quickening support using the CompilerDriver
interface like the native compiler does (Quick or Portable backends).
To replace instructions, the DEX-to-DEX compiler must be able to modify the
mmapped DEX file. Since it can be read-only protected, the DEX-to-DEX compiler
must be able to temporarily change its protection to read-write mmapped file.
To achieve this, this CL adds support for changing DEX file protection with
DexFile::EnableWrite and DexFile::DisableWrite methods. Besides, it also adds
a dedicated lock (DexFile::modification_lock) to ensure thread-safety and avoid
concurrent DEX file protection change (from a parallel DEX-to-DEX compiler on
the same DEX file).
Change-Id: Iaafd103b9766810d7fc94a2c424a8fafba66e26a
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Make the instrumentation responsible for whether we want method entry/exit
stubs, and allow it to use interpreter entry stubs when instruction by
instruction instrumentation is required. Improve deoptimization so more JDWP
test cases are passing.
Refactor exception debug posting, in particular improve reporting in the
interpreter. Improve class linker exception throwing so that broken dex files
are more likely to be reported. Fixes the performance issue Bug: 8410519.
Fix some error reporting lock level errors for the large object space. Make
fast object verification faster.
Add some debug mode robustness to finding dex PCs in GC maps.
Add printf attributes to JniAbortF and fix errors.
Expand run-test 044 to test return behaviors and fix issues with not throwing
appropriate exceptions for proxies.
Ensure causes are reported with a class linker NoClassDefFoundError and JNI
NoSuchFieldError.
Remove unused debugMe and updateDebuggerFromCode.
There's a minor sizing tweak to the arg array builder, and an extra reference
array check in the interpreter.
Some clean-up of trace code.
Fix reg type cache destructor if it is called after the reg type cache is
shutdown (as is the case in oatdump).
Change-Id: I6519c7b35df77f978d011999354c864f4918e8ce
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The array-length instruction is likely to encounter nulls.
Change-Id: I628f5f00dfaff9414740e2f7015b9fb3d34a1bc9
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runtime tests.
Change-Id: I6427b09c40bc9a48e39c560f01d2be14ba115ccc
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