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Race condition in cairo-trace

Submitted by Seongwon Cho

Assigned to Carl Worth @cworth

Link to original bug (#52936)

Description

There is a race condition in _init_logfile() in trace.c

If a application fork and execute child process by execl() value of CAIRO_TRACE_FD is also duplicated and the value of CAIRO_TRACE_FD will be -1 in child process.

In that case child process doesn,t create new log file and we can,t get trace file of child process.

Thanks.

Version: 1.12.2

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