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  • chevalier@alum.wellesley.edu's avatar
    ed95d86d
    Avoid segfault when ticky file argument is stderr · ed95d86d
    chevalier@alum.wellesley.edu authored 
    If you compiled a program with -ticky and ran it with:
./foo +RTS -rstderr -RTS
the result would be a segfault. This was because the RTS interprets stderr to
mean "use debugBelch to print out messages," and sets the ticky file pointer
to NULL as a result, but PrintTickyInfo (the function in Ticky.c that prints
out the ticky report) wasn't checking for NULL.

I changed PrintTickyInfo to check whether the ticky file pointer is NULL and 
output to stderr if so.

Also removed an unused import from CodeOutput.lhs.
    ed95d86d
    History
    Avoid segfault when ticky file argument is stderr
    chevalier@alum.wellesley.edu authored 
    If you compiled a program with -ticky and ran it with:
./foo +RTS -rstderr -RTS
the result would be a segfault. This was because the RTS interprets stderr to
mean "use debugBelch to print out messages," and sets the ticky file pointer
to NULL as a result, but PrintTickyInfo (the function in Ticky.c that prints
out the ticky report) wasn't checking for NULL.

I changed PrintTickyInfo to check whether the ticky file pointer is NULL and 
output to stderr if so.

Also removed an unused import from CodeOutput.lhs.
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