asan.c File Reference

AddressSanitizer error reporting integration with logging system. More...

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Detailed Description

AddressSanitizer error reporting integration with logging system.

Integrates ASan error reports into the ascii-chat logging system so that memory errors are captured in log files and respect –grep filtering, rather than spamming stderr and corrupting terminal rendering.

Uses __asan_set_error_report_callback() to intercept ASan reports before they hit stderr. Reports are fed through log_fatal() which respects:

• –log-file (writes to file instead of stdout/stderr)
• –grep (filters error messages)
• Proper formatting without terminal corruption

CONSTRUCTOR TIMING: The attribute((constructor)) runs before main(), ensuring ASan reports are captured from the very first allocation.

SAFETY: The callback is intentionally minimal to avoid deadlocks. ASan calls this callback when memory is corrupted, so:

• No mutex locks (deadlock risk)
• No complex operations
• Just pass the report string to logging

The actual logging (log_fatal) may be called in an unsafe state, but at that point the process is about to abort anyway, so best effort is fine.

Definition in file asan.c.