patches/gdb/6.3/630-debian_24.tracepoint-segv.patch
author |
"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
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Sun May 20 13:48:26 2007 +0000 (2007-05-20) |
changeset 112 |
ea15433daba0 |
permissions |
-rw-r--r-- |
Ah! I finally have a progress bar that doesn't stall the build!
- pipe size in Linux is only 8*512=4096 bytes
- pipe size is not setable
- when the feeding process spits out data faster than the eating
process can read it, then the feeding process stalls after 4KiB
of data sent to the pipe
- for us, the progress bar would spawn a sub-shell every line,
and the sub-shell would in turn spawn a 'date' command.
Which was sloooww as hell, and would cause some kind of a
starvation: the pipe was full most of the time, and the
feeding process was stalled all this time.
Now, we use internal variables and a little hack based onan offset
to determine the elapsed time. Much faster this way, but still
CPU-intensive.
yann@96
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Trivial. Still need to submit this.
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yann@96
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yann@96
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Index: gdb-6.1/gdb/tracepoint.c
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yann@96
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===================================================================
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yann@96
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--- gdb-6.1.orig/gdb/tracepoint.c 2004-04-05 13:26:43.000000000 -0400
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yann@96
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+++ gdb-6.1/gdb/tracepoint.c 2004-04-05 13:26:45.000000000 -0400
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yann@96
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@@ -853,6 +853,8 @@ read_actions (struct tracepoint *t)
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yann@96
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else
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yann@96
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line = gdb_readline (0);
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yann@96
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yann@96
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+ if (line == NULL || *line == EOF)
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yann@96
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+ break;
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yann@96
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linetype = validate_actionline (&line, t);
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yann@96
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if (linetype == BADLINE)
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yann@96
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continue; /* already warned -- collect another line */
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