Understanding the exception types in a crash report

Overview

The exception type in a crash report describes how the app terminated. It’s a key piece of information that guides how to investigate the source of the problem.

Exception Type: EXC_BAD_ACCESS (SIGSEGV)

Crash reports record language exception information separately, including language exceptions thrown by an API or language features in Objective-C or C++.

Topics

Exceptions

• EXC_ARITHMETIC
• EXC_BAD_ACCESS
• EXC_BAD_ACCESS (SIGBUS)
• EXC_BAD_ACCESS (SIGSEGV)
• EXC_BREAKPOINT (SIGTRAP) and EXC_BAD_INSTRUCTION (SIGILL)
• EXC_CRASH
• EXC_CRASH (SIGABRT)
• EXC_CRASH (SIGKILL)
• EXC_CRASH (SIGQUIT)
• EXC_CRASH (SIGSYS)
• EXC_CRASH (SIGTERM)
• EXC_GUARD
• EXC_RESOURCE

See Also

Crash reports

• Adding identifiable symbol names to a crash report
• Identifying the cause of common crashes
• Analyzing a crash report
• Examining the fields in a crash report
• Interpreting the JSON format of a crash report