| 5540f6e420ffab7bb0c39dc508bdc3a2e0d67507 |
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08-Feb-2010 |
Bill Buzbee <buzbee@google.com> |
Jit: Remove references to interpState from C interpreter
Fix for Issue 2157987:
Eventual isssue with interpState->jitState in <dalvik/vm/mterp/c/header.c
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| 96516932f1557d8f48a8b2dbbb885af01a11ef6e |
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29-Oct-2009 |
Andy McFadden <fadden@android.com> |
Change the way breakpoints work.
This replaces the breakpoint mechanism with a more efficient approach.
We now insert breakpoint instructions into the bytecode stream instead of
maintaining a table. This requires mapping DEX files as private instead
of shared, which allows copy-on-write to work. mprotect() is used to
guard the pages against inadvertent writes.
Unused opcode EC is now OP_BREAKPOINT. It's not recognized by dexdump or
any interpreter except portdbg, but it can be encountered by the bytecode
verifier (the debugger can request breakpoints in unverified code).
Breakpoint changes are blocked while the verifier runs to avoid races.
This eliminates method->debugBreakpointCount, which is no longer needed.
(Also, it clashed with LinearAlloc's read-only mode.)
The deferred verification error mechanism was using a code-copying
approach to modify the bytecode stream. That has been changed to use
the same copy-on-write modification mechanism.
Also, normalized all PAGE_SIZE/PAGESIZE references to a single
SYSTEM_PAGE_SIZE define.
Simple Fibonacci computation test times (opal-eng):
JIT, no debugger: 10.6ms
Fast interp, no debugger: 36ms
Portable interp, no debugger: 43.8ms
ORIG debug interp, no breakpoints set: 458ms
ORIG debug interp, breakpoint set nearby: 697ms
NEW debug interp, no breakpoints set: 341ms
NEW debug interp, breakpoints set nearby: 341ms
Where "nearby" means there's a breakpoint in the method doing the
computation that isn't actually hit -- the VM had an optimization where
it flagged methods with breakpoints and skipped some of the processing
when possible.
The bottom line is that code should run noticeably faster while a
debugger is attached.
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| 72e93344b4d1ffc71e9c832ec23de0657e5b04a5 |
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13-Nov-2009 |
Jean-Baptiste Queru <jbq@google.com> |
eclair snapshot
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| 080ca4a5498eab5548856a0b8de91e3ab1e89a64 |
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05-Aug-2009 |
Andy McFadden <fadden@android.com> |
Regenerate mterp.
Whoops! Should've been part of d33b0c3fbd81ae96c5d5c034030d62caac33c310.
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| 1da12167d913efde56ec3b40491524b051679f2c |
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06-Jun-2009 |
Andy McFadden <fadden@android.com> |
Swap the meaning of r7 and r8.
This swaps rIBASE and rINST, so that we can access rINST with 16-bit
THUMB instructions.
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| ba4fc8bfc1bccae048403bd1cea3b869dca61dd7 |
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01-Jun-2009 |
Ben Cheng <bccheng@android.com> |
Initial port of the Dalvik JIT enging to the internal repository.
Fixed files with trailing spaces.
Addressed review comments from Dan.
Addressed review comments from fadden.
Addressed review comments from Dan x 2.
Addressed review comments from Dan x 3.
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| a80b76553c2b9f33c4063ae8c69c5362d961de81 |
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19-May-2009 |
Andy McFadden <fadden@android.com> |
Added basic VFP support to Dalvik interpreter.
This adds opcode handlers for all instructions that have a VFP equivalent
or (for the compare operations) near-equivalent.
The inclusion of VFP is keyed off of TARGET_ARCH_VERSION, so enabling
this requires setting "TARGET_ARCH_VERSION=armv5te-vfp" in a buildspec.
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