[LLVMbugs] [Bug 17064] New: [ASan] Turn use-after-return checking on by default

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Sep 2 15:04:06 PDT 2013


            Bug ID: 17064
           Summary: [ASan] Turn use-after-return checking on by default
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chandlerc at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Filing this as a tracking bug to track progress on turning ASan's
use-after-return checking on by default.

The reason I want this on by default is that there is very little to indicate
to a user that a bug in their code is related to use-after-return, and so it
seems especially valuable to eagerly diagnose it. Also, it seems likely that by
applying LLVM's capture analysis to the instrumentation the overhead associated
with this mode could be significantly reduced.

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