DynamoRIO

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:

• The Arm Instruction Emulator (ArmIE)
• WinAFL, the Windows fuzzing tool, as an instrumentation and code coverage engine
• The fine-grained profiler for ARM DrCCTProf
• The portable and efficient framework for fine-grained value profilers VClinic
• The sampling-based sanitizer framework GWPSan

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 cache simulator drcachesim
  • TLB simulation
  • Reuse distance
  • Reuse time
  • Opcode mix
  • Function call tracing
• 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/