On Mon, Aug 17, 2015 at 12:50 AM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> > * make launches "ccache gcc -o test.o test.c" > * user types control-C > * ccache receives SIGINT and exits > * make does unlink("test.o") to clean up after failed compile step, which > it thinks is done > * gcc creates test.o > Stupid question: Does ccache let gcc write to test.o directly, or does it write to some temporary file and then ccache copies it? > * gcc receives SIGINT and exits > > We're left with a probably-broken test.o in the filesystem, despite > make's attempt to clean up. Now, the window for this is pretty narrow, > but I think it could happen: I don't believe that sending signals to > multiple processes is atomic in most kernels. > > You really don't want ccache to exit until after all externally-observable > things have stopped happening. (I recently fixed a somewhat related bug > in Postgres :-(, which is why this caught my eye.) > > regards, tom lane > -- Nadav Har'El n...@cloudius-systems.com _______________________________________________ ccache mailing list ccache@lists.samba.org https://lists.samba.org/mailman/listinfo/ccache