Different Running Behaviors of Non-void Functions Without Return Values

Error Information

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warning: non-void function does not return a value in all control paths [-Wreturn-type]
Trace/breakpoint trap (core dumped)

Problem

For binary security purposes, the compiler inserts invalid instructions into branches that do not return values, which may cause a core dump during runtime.

Solution

• Add return values for non-void functions.
• Change the type of functions that do not return values to void.
• Use the clang-tidy tool to identify such issues and provide modification suggestions.