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authorRich Felker <dalias@aerifal.cx>2015-10-08 22:03:53 +0000
committerRich Felker <dalias@aerifal.cx>2015-10-08 22:10:09 +0000
commit7b9f57f207b51132f188f750161953b7baf32154 (patch)
tree38055088e85f9428998dd1d37381c18c6f1339ff /tools/add-cfi.i386.awk
parentdc97951402b499023ce877dd2438bce0840b2c26 (diff)
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fix open_[w]memstream behavior when no writes take place
the specification for these functions requires that the buffer/size
exposed to the caller be valid after any successful call to fflush or
fclose on the stream. the implementation's approach is to update them
only at flush time, but that misses the case where fflush or fclose is
called without any writes having taken place, in which case the write
flushing callback will not be called.

to fix both the observable bug and the desired invariant, setup empty
buffers at open time and fail the open operation if no memory is
available.
Diffstat (limited to 'tools/add-cfi.i386.awk')
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