| commit | 17106ec7faeeb170d53f4ceea6a69bc447455deb | [log] [tgz] |
|---|---|---|
| author | Toshi Piazza <toshi.piazza@gmail.com> | Tue Jun 13 14:17:19 2017 |
| committer | Derek Bruening <bruening@google.com> | Tue Jun 13 14:17:19 2017 |
| tree | 9b0fb18bc98c9687038d7798e37047f910a3b5a5 | |
| parent | e211dd4b7d2a3002e8ca206eeb60c951ae8d04fb [diff] |
i#2449 memval_simple: fix missing register restoration (#2472) If `instrument_post_write` and `instrument_mem` both reserve the same register via drreg, drreg may elide a register save and restore in between them. If the application instruction relies on this particular register as well, `drutil_insert_get_mem_addr` will also compute the address incorrecly. We fix this by restoring the app register explicitly. We restore *both* reg_tmp and reg_addr. We also only restore these registers in the case that ref uses reg_tmp or reg_addr, for a slight optimization. Adds a test for the memval_simple drreg bug. Fixes #2449
DynamoRIO is a runtime code manipulation system that supports code transformations on any part of a program, while it executes. DynamoRIO exports an interface for building dynamic tools for a wide variety of uses: program analysis and understanding, profiling, instrumentation, optimization, translation, etc. Unlike many dynamic tool systems, DynamoRIO is not limited to insertion of callouts/trampolines and allows arbitrary modifications to application instructions via a powerful IA-32/AMD64/ARM/AArch64 instruction manipulation library. DynamoRIO provides efficient, transparent, and comprehensive manipulation of unmodified applications running on stock operating systems (Windows, Linux, or Android) and commodity IA-32, AMD64, ARM, and AArch64 hardware. Mac OSX support is in progress.
Tools built on DynamoRIO include:
DynamoRIO‘s powerful API abstracts away the details of the underlying infrastructure and allows the tool builder to concentrate on analyzing or modifying the application’s runtime code stream. API documentation is included in the release package and can also be browsed online. Slides from our past tutorials are also available.
DynamoRIO is available free of charge as a binary package for both Windows and Linux. DynamoRIO's source code is available under a BSD license.
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To report a bug, use the issue tracker.
See also the DynamoRIO home page: http://dynamorio.org/