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[Qemu-devel] [PATCH v2 4/7] qemu-log: support simple pid substitution in
From: |
Alex Bennée |
Subject: |
[Qemu-devel] [PATCH v2 4/7] qemu-log: support simple pid substitution in logfile |
Date: |
Fri, 28 Mar 2014 16:43:24 +0000 |
When debugging stuff that occurs over several forks it would be useful
not to keep overwriting the one logfile you've set-up. This allows a
simple %d to be included once in the logfile parameter which is
substituted with getpid().
Signed-off-by: Alex Bennée <address@hidden>
Reviewed-by: Leandro Dorileo <address@hidden>
diff --git a/qemu-log.c b/qemu-log.c
index 83e0cb4..4dd530c 100644
--- a/qemu-log.c
+++ b/qemu-log.c
@@ -70,11 +70,24 @@ void do_qemu_set_log(int log_flags, bool use_own_buffers)
qemu_log_close();
}
}
-
+/*
+ * Allow the user to include %d in their logfile which will be
+ * substituted with the current PID. This is useful for debugging many
+ * nested linux-user tasks but will result in lots of logs.
+ */
void qemu_set_log_filename(const char *filename)
{
g_free(logfilename);
- logfilename = g_strdup(filename);
+ if (g_strrstr(filename, "%d")) {
+ /* if we are going to format this we'd better validate first */
+ if (g_regex_match_simple("^[^%]+%d[^%]+$", filename, 0, 0)) {
+ logfilename = g_strdup_printf(filename, getpid());
+ } else {
+ g_error("Bad logfile format: %s", filename);
+ }
+ } else {
+ logfilename = g_strdup(filename);
+ }
qemu_log_close();
qemu_set_log(qemu_loglevel);
}
--
1.9.1
- [Qemu-devel] [PATCH v2 0/7] qemu-log: various fixes and enhancements, Alex Bennée, 2014/03/28
- [Qemu-devel] [PATCH v2 1/7] qemu-log: correct help text for -d cpu, Alex Bennée, 2014/03/28
- [Qemu-devel] [PATCH v2 2/7] qemu-log: Avoid function call for disabled qemu_log_mask logging, Alex Bennée, 2014/03/28
- [Qemu-devel] [PATCH v2 4/7] qemu-log: support simple pid substitution in logfile,
Alex Bennée <=
- [Qemu-devel] [PATCH v2 3/7] qemu-log: Improve the "exec" TB execution logging, Alex Bennée, 2014/03/28
- [Qemu-devel] [PATCH v2 5/7] qemu-log: new option -dfilter to limit output, Alex Bennée, 2014/03/28
- [Qemu-devel] [PATCH v2 6/7] qemu-log: dfilter-ise exec, in_asm, out_asm, and op_opt, Alex Bennée, 2014/03/28
- [Qemu-devel] [PATCH v2 7/7] qemu-log: add nochain option to disable TB chaining, Alex Bennée, 2014/03/28