Crash Log Analyzer

Crash Log Analyzer

Parse macOS .crash and .ips files to extract useful debugging information.

Capabilities

• Parse crash report files
• Symbolicate stack traces
• Identify crash type (EXC_BAD_ACCESS, assertion, etc.)
• Extract thread information
• Show crash location and context
• Identify common crash patterns
• Generate crash statistics
• Find duplicate crashes
• Export crash data

Tools Included

crash_analyzer.py

Python script to parse crash logs

Commands:

# Analyze crash log
./​crash_analyzer.py crash.crash

# Symbolicate (requires dSYM)
./​crash_analyzer.py crash.crash --dsym PaleoRose.app.dSYM

# Batch analyze directory
./​crash_analyzer.py --batch ~/​Library/​Logs/​DiagnosticReports/​PaleoRose*

# Export summary
./​crash_analyzer.py crash.crash --export-json summary.json

# Find duplicates
./​crash_analyzer.py --find-duplicates ~/​Library/​Logs/​DiagnosticReports/

Crash Types Handled

• EXC_BAD_ACCESS (SIGSEGV, SIGBUS)
• EXC_CRASH (SIGABRT)
• Uncaught exceptions
• Assertions
• Watchdog timeouts
• Stack overflow

Usage

Use when:

• App crashes during testing
• Need to analyze user crash reports
• Debugging difficult-to-reproduce crashes
• Tracking crash patterns
• Preparing crash reports for issues

Output Format

Crash Summary
-------------
Process: PaleoRose
Bundle ID: com.example.paleorose
Version: 1.0.0
Date: 2025-11-08 20:30:15

Crash Type: EXC_BAD_ACCESS (SIGSEGV)
Exception: KERN_INVALID_ADDRESS at 0x0000000000000000

Crashed Thread: 0 (Main Thread)

Stack Trace:
  0  PaleoRose  0x10045a123 -[TableListController tableView:objectValueFor:row:] + 123
  1  AppKit     0x7fff2b3c4567 -[NSTableView _sendDataSourceValue] + 234
  2  AppKit     0x7fff2b3c4890 -[NSTableView reloadData] + 567

Probable Cause: Null pointer dereference in tableNames array access
Recommendation: Add nil check before accessing tableNames[row]