Make tracing usable for debugging

[petervdonovan]

If traces are not flushed to files when there is an abnormal termination, such as force-quitting a deadlocked program, then they are not very useful for debugging.

Since debugging seems like an important use case of traces, they should probably be flushed to files even when there is an abnormal termination.

Summary by CodeRabbit

• Bug Fixes
  • Improved termination sequence to ensure proper shutdown of tracing before reactor cleanup.

[coderabbitai]

Walkthrough

The primary change involves adjusting the sequence of operations in the termination function within core/reactor_common.c. Specifically, the call to lf_tracing_global_shutdown() has been moved to execute before the reactors are cleaned up, which may affect the termination process and potentially improve the tracing shutdown sequence.

Changes

File	Change Summary
core/reactor_common.c	Moved lf_tracing_global_shutdown() call above reactor cleanup in termination function

Sequence Diagram(s)

sequenceDiagram
    participant MainFunction
    participant Termination

    MainFunction->>Termination: Call termination()
    Termination->>ReactorCleanup: Cleanup reactors
    Note over Termination: Existing Flow
    MainFunction->>Termination: Call termination()
    Termination->>TracingShutdown: lf_tracing_global_shutdown()
    Termination->>ReactorCleanup: Cleanup reactors
    Note over Termination: New Flow

Loading

This sequence diagram highlights the change in the order of operations within the termination function. The lf_tracing_global_shutdown() function call has been moved to occur before the reactors are cleaned up.

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[coderabbitai]

Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 4f8ea7d and 83ee449.

Files selected for processing (1)

• core/reactor_common.c (2 hunks)

Additional comments not posted (1)

core/reactor_common.c (1)

1169-1169: LGTM! But verify the function impact in the codebase.

The code changes are approved. Moving lf_tracing_global_shutdown() before the cleanup of reactors ensures that traces are flushed during abnormal terminations.

However, ensure that this change does not introduce any side effects in the codebase.