Javaflame - Capture function arguments, visualize them in a flamegraph by Lucas de Carvalho Bueno

JavaFlame is a debugging/investigation tool that captures function calls and arguments, visualizing them in a flamegraph format

Key features:

• Intercepts all function calls and their argument values
• Works with any Java code including external libraries
• Generates HTML visualization with three views: flame graph, call graph, and hierarchical text
• Runs locally/offline without external dependencies
• Can be added as a Java agent without code modifications

Tool focuses on understanding program flow rather than performance metrics:

• Shows actual parameter values unlike traditional profilers
• Displays call relationships and ordering
• Helps developers understand unfamiliar codebases
• Useful for debugging and investigation scenarios

Filtering capabilities:

• Can target specific packages/classes/methods
• Supports Boolean expressions and negation
• Helps manage memory usage by limiting scope
• Can filter visualization results after capture

Usage considerations:

• Not meant for production use due to performance impact
• Best used in development/testing environments
• Can be integrated with unit tests
• Memory intensive when capturing all calls without filters
• Works through bytecode instrumentation

Visualization features:

• Interactive HTML output
• Multiple thread support
• Zoomable interface
• Searchable call data
• Exportable as images