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chromium / external / github.com / DynamoRIO / dynamorio / 5bd7ce5b3ca5bdaa9ef179e45b567bd0ae813609
commit5bd7ce5b3ca5bdaa9ef179e45b567bd0ae813609[log] [tgz]
authorJack Gallagher <jack.gallagher@arm.com>Fri Feb 09 09:54:25 2024
committerGitHub <noreply@github.com>Fri Feb 09 09:54:25 2024
treeef2872eb9caef8a410b078e6a7a8b4d8f5056dee
parent55da514b7dbb00092029e053e118dcf6ddd1bfe6 [diff]
i#6585: Add drcachesim vector length trace marker (#6603)

Adds a new trace marker 'TRACE_MARKER_TYPE_DYNAMIC_VECTOR_LENGTH'
to drcachesim that indicates the current vector length for architectures which have a dynamic vector length that can't be statically determined from the instruction.

The marker is emitted as part of the thread header when running on AArch64 with SVE support, but in the future could also be used to track changes in the vector length after prctl(PR_SVE_SET_VL, ..) system calls (i#6625).

Some SVE load and store instructions such as
    LDR <Zt>, [<Xn|SP>{, #<imm>, MUL VL}]
or
    ST1D { <Zt>.D }, <Pg>, [<Xn|SP>{, #<imm>, MUL VL}]

scale the immediate offset based on the hardware vector length so knowing the correct vector length for the traced application is important to properly decode and analyse these instructions.

Fixes: #6585
Issues: #6625
14 files changed
tree: ef2872eb9caef8a410b078e6a7a8b4d8f5056dee
  1. .github/
  2. api/
  3. clients/
  4. core/
  5. ext/
  6. libutil/
  7. make/
  8. suite/
  9. third_party/
  10. tools/
  11. .clang-format
  12. .gitignore
  13. .gitmodules
  14. ACKNOWLEDGEMENTS
  15. CMakeLists.txt
  16. CONTRIBUTING.md
  17. CTestConfig.cmake
  18. License.txt
  19. README
  20. README.md
README.md

DynamoRIO

DynamoRIO logo

About DynamoRIO

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.

Existing DynamoRIO-based tools

DynamoRIO is the basis for some well-known external tools:

Tools built on DynamoRIO and available in the release package include:

  • The memory debugging tool Dr. Memory
  • The tracing and analysis framework drmemtrace with multiple tools that operate on both online (with multi-process support) and offline instruction and memory address traces:
  • The legacy processor emulator drcpusim
  • The “strace for Windows” tool drstrace
  • The code coverage tool drcov
  • The library tracing tool drltrace
  • The memory address tracing tool memtrace (drmemtrace's offline traces are faster with more surrounding infrastructure, but this is a simpler starting point for customized memory address tracing)
  • The memory value tracing tool memval
  • The instruction tracing tool instrace (drmemtrace's offline traces are faster with more surrounding infrastructure, but this is a simpler starting point for customized instruction tracing)
  • The basic block tracing tool bbbuf
  • The instruction counting tool inscount
  • The dynamic fuzz testing tool Dr. Fuzz
  • The disassembly tool drdisas
  • And more, including opcode counts, branch instrumentation, etc.: see API samples

Building your own custom tools

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.

Downloading DynamoRIO

DynamoRIO is available free of charge as a binary package for both Windows and Linux. DynamoRIO's source code is available primarily under a BSD license.

Obtaining Help

Use the discussion list to ask questions.

To report a bug, use the issue tracker.

See also the DynamoRIO home page: http://dynamorio.org/