Jennifer Taylor
9544287b13
Deal with empty if statements (usually compiled-out debug switches).
2021-05-05 00:56:59 +00:00
Jennifer Taylor
25278d76c5
Fix stack walking bug with respect to pre-converted if statements.
2021-05-05 00:56:33 +00:00
Jennifer Taylor
eba79ed3bc
Add heuristic for parsing a troublesome flag in SWF object create tags.
2021-05-05 00:55:34 +00:00
Jennifer Taylor
f75b9f038e
Implement a few more opcodes to get a few more Bishi files decompiling.
2021-05-05 00:55:02 +00:00
Jennifer Taylor
636e1876bc
Add while loop detection and conversion.
2021-05-05 00:54:34 +00:00
Jennifer Taylor
2f79a6401d
Fix massive bug which dropped function calls without returns from the finished output.
2021-05-05 00:53:58 +00:00
Jennifer Taylor
f09fd79a45
Add for loop detection and conversion.
2021-05-05 00:53:38 +00:00
Jennifer Taylor
e17f7c2bdb
Add some tests for for/while loops in anticipation of optimizing output.
2021-05-05 00:53:02 +00:00
Jennifer Taylor
83f4f43e9e
Implement a few more opcodes, fix stack ordering with multiple entries after reconciliation.
2021-05-04 02:32:32 +00:00
Jennifer Taylor
eddb8dc208
Several more code output optimizations done.
2021-05-04 02:32:04 +00:00
Jennifer Taylor
44b3628a85
Fix logic error in merging stacks when if statements didn't have a true and false body.
2021-05-04 02:31:07 +00:00
Jennifer Taylor
4790385022
Fix a logic error in if statement unwrapping, remove duplicated code in favor of a better true/false detection algorithm.
2021-05-04 02:30:37 +00:00
Jennifer Taylor
108d7c228d
Handle having bytecode with no actual entries.
2021-05-04 02:29:53 +00:00
Jennifer Taylor
54b4c88d65
It seems that some bytecode leaves extra stuff on the stack sometimes, I think this is fine?
2021-05-04 02:29:27 +00:00
Jennifer Taylor
70c7448aa0
Fix nasty bug where sometimes we would have gotos without corresponding labels.
2021-05-02 03:50:48 +00:00
Jennifer Taylor
336ef6fc3d
Check in some beta code for a new style of if detection that does not work yet.
2021-05-02 03:50:19 +00:00
Jennifer Taylor
7493db034f
Add in basic throw, test code generation of mostly the same code as we tested the code graph with.
2021-05-02 03:49:35 +00:00
Jennifer Taylor
829597a871
Address the fact that I never handled END actions (they end processing as they are encountered).
2021-05-02 03:48:38 +00:00
Jennifer Taylor
261c3d7fbd
Start a unit test framework for decompilation, in the hopes of eventually tracking down a logic bug in if extraction.
2021-05-02 03:48:07 +00:00
Jennifer Taylor
820a86845d
Fix shallowest successor find when multiple nodes lead to the same location, fix if swap optimization and add BITAND and NOT_BITAND if support.
2021-04-26 03:24:47 +00:00
Jennifer Taylor
8cf219cb25
Avoid duplicating labels outside of and inside of do-while statements. Avoid going to or generating negative labels (artificially inserted nodes).
2021-04-26 03:24:24 +00:00
Jennifer Taylor
b7523b5521
Fix if processing by getting rid of negation early optimization. There was a path that
...
was negating but not being checked when doing the final render, leaving some if statements
inverted. Moved the optimization to a final pass for more generalized correctness.
2021-04-26 02:50:19 +00:00
Jennifer Taylor
2d4f6cadfb
Much more complicated stack walking algorithm that chains the stack through chunks and also calculates when temporary variables are needed.
2021-04-26 01:28:48 +00:00
Jennifer Taylor
4d0bfe5637
Fix an edge case in if detection where we reused IDs incorrectly by stopping the reuse of IDs. Also, convert returns much earlier in the stack.
2021-04-26 01:27:51 +00:00
Jennifer Taylor
28ce17b996
Apparently some BishiBashi levels use an even older AP2 version.
2021-04-26 01:27:10 +00:00
Jennifer Taylor
06bd9d1245
Fix logic error where we lost if statement jump points because __gather_chunks was too-aggressively dropping end pointers.
2021-04-26 01:26:50 +00:00
Jennifer Taylor
6f78668e9a
Fix up exceptions and add more invariant checks to loop generation code.
2021-04-26 01:25:32 +00:00
Jennifer Taylor
5761474bec
Enforce another invariant for dominator calculation that would have caught another hard-to-find bug.
2021-04-26 01:24:25 +00:00
Jennifer Taylor
a09ad70de5
Improve a lot of exception message, enforce several more invariants in
...
graph generation that would have caught previous bugs, fix possible
issue with loop/dominator code if the entry code chunk was the beginning
of a loop.
2021-04-26 01:23:54 +00:00
Jennifer Taylor
44f5e5cdcc
Fix control flow graph splitting function to handle functions that jump to the end offset as a way of exiting early.
2021-04-26 01:23:08 +00:00
Jennifer Taylor
6323ef9adf
Implment several more opcodes in actual decompilation step.
2021-04-26 01:22:39 +00:00
Jennifer Taylor
6052deed3c
Refactor code generation step to allow for nested function definitions, actually hook those up.
2021-04-26 01:22:14 +00:00
Jennifer Taylor
3a9b3a7b3c
Pass indentation context into expression rendering for upcoming function definition support.
2021-04-26 01:21:42 +00:00
Jennifer Taylor
351e7060b8
Allow subclasses of verbose manager to check verbose state directly.
2021-04-26 01:21:03 +00:00
Jennifer Taylor
51e27c0cff
Enhance goto eliminiation to remove all unneeded gotos.
2021-04-24 19:37:14 +00:00
Jennifer Taylor
964d6f082c
Clean up types on If statement, stop using strings to pass information.
2021-04-24 19:36:58 +00:00
Jennifer Taylor
534ab20f98
Add dead code eliminiation so dominators doesn't fail. Fix a tricky jump case with if statements.
2021-04-24 18:13:07 +00:00
Jennifer Taylor
de84379ad0
Implement a lot more opcodes for expressions, fix an if conditional, improve while display.
2021-04-24 18:11:20 +00:00
Jennifer Taylor
cc27d2418e
Fix register display on assignment, add a few optimizing passes to clean up code.
2021-04-24 18:10:27 +00:00
Jennifer Taylor
f1aea996c4
Handle if-goto pattern that I previously neglected.
2021-04-24 18:09:44 +00:00
Jennifer Taylor
6221d0273b
Overhauled statement eval system so we always get back a list of statements.
2021-04-24 18:08:04 +00:00
Jennifer Taylor
b0778e1110
Convert expression rendering to an explicit function so we can retain __repr__ for debugging.
2021-04-24 18:07:01 +00:00
Jennifer Taylor
f2761b90b0
Restructure a lot of types to fit an expression/statement model and making a lot of stuff make more sense.
2021-04-24 18:05:58 +00:00
Jennifer Taylor
19c6de1fcc
Actually decompile basic bytecode. There's much left to do, but some basics work!
2021-04-24 18:05:03 +00:00
Jennifer Taylor
aebc277b62
Add a graph walker at the very end to verify that we've handled all control paths correctly, fix an edge case in If detection.
2021-04-24 18:03:24 +00:00
Jennifer Taylor
6aa04b0c1b
Implement recursive if detection.
2021-04-24 18:02:26 +00:00
Jennifer Taylor
6e34d2647e
Implement loop break/continue/goto processing.
2021-04-24 18:01:25 +00:00
Jennifer Taylor
738fce36c9
Lots more implementation done on decompiler, including better control flow and loop detection.
2021-04-24 18:00:13 +00:00
Jennifer Taylor
b77ccdd5b9
Beginning of an AFP ByteCode decompiler, starting with a massive code reorg and a control flow graph analyzer.
2021-04-24 17:59:36 +00:00
Jennifer Taylor
011b84aceb
Actually parse bytecode into an intermediate representation.
2021-04-21 03:58:53 +00:00
