CHANGELOG.md

Truffle Tools Changelog

This changelog summarizes major changes between Truffle Tools versions.

Version 21.3.0

• Reimplemented CPUSampler to use the Truffle language safepoints thus deprecating several API functions.
• Added new option --cpusampler.SampleContextInitialization which includes code executed during context initialization in the general sampling profile instead of grouping it into a single entry.
• Default CLI output of CPUSampler was simplified to not include compiled times.
• CPUSampler APIs to distingish compiled from interpreted samples were replaced by a more general API that supports an arbitrary number of compilation tiers.
• Added the --cpusampler.ShowTiers option that shows time spend in each optimization tier.
• Support for hash interoperability in Insight - no need to use Truffle::Interop.hash_keys_as_members anymore
• Cooperative heap dumping when embedding Insight into Java applications
• Add an SVG flamegraph output format to the CPUSampler, use option --cpusampler.OutputFormat=flamegraph.

Version 21.1.0

• Use --heap.dump=/path/to/file/to/generate.hprof to enable Heap Dumping via Insight
• Insight object API provides access to charIndex, charLength and charEndIndex

Version 21.0.0

• --insight option is no longer considered experimental
• Use ctx.iterateFrames to access whole stack and its variables
• Embedders can inject additional objects into Insight scripts

Version 20.3.0

• GraalVM Insight Maven artifact is now org.graalvm.tools:insight:20.3.0
• GraalVM Insight can intercept execution and modify return values

Version 20.2.0

• GraalVM Insight can modify values of local variables
• Write GraalVM Insight scripts in Python

Version 20.1.0

• GraalVM Insight can access local variables in C, C++ and other LLVM languages
• GraalVM Insight is the new name for the former T-Trace technology

Version 20.0.0

• Access to source location (see line, column, etc.) and sourceFilter selector in Insight agent object API
• Embedding Insight into own application is now easily done via Graal SDK
• Apply Insight scripts C/C++/Julia & co. code - e.g. hack into C with JavaScript!
• Better error handling - e.g. propagation of errors from Insight scripts to application code
• Hack your Insight scripts in R!

Version 19.3.0

• Introducing GraalVM Insight - a multipurpose, flexible tool for instrumenting and monitoring applications at full speed.
• Added a CLI code coverage tool for truffle languages. Enabled with --coverage. See --help:tools for more details.