[llvm-bugs] [Bug 31247] New: -fsanitize-coverage=trace-pc-guard fails on OS X

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Dec 2 23:16:35 PST 2016


            Bug ID: 31247
           Summary: -fsanitize-coverage=trace-pc-guard fails on OS X
           Product: clang
           Version: trunk
          Hardware: All
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: llvm at tim-smith.us
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Trying to build anything [1] with `-fsanitize-coverage=trace-pc-guard` fails on
OS X with the message:

$ /usr/local/opt/llvm/bin/clang -o test test.c -fsanitize=address

fatal error: error in backend: Global variable '__sancov_gen_' has an invalid
section specifier '__sancov_guards': mach-o section specifier requires a
segment and section separated by a comma.
clang-4.0: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 4.0.0 (http://llvm.org/git/clang.git
012b8f13a36df5f78c62236cb3b3fc595eaa7e00) (http://llvm.org/git/llvm.git
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin

Compilation succeeds with -fsanitize-coverage=trace-pc.

[1] i.e. int main() { return 0; }

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