diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-09 15:57:58 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-06 11:42:57 +0100 |
| commit | 9f45a641097b0a54c673fe3399c7a8ccb6f06af1 (patch) | |
| tree | e4f72f6f63c0a70779de9a97bab3db5ff23b1ea9 /trace/control.c | |
| parent | dc1d91ac567c49cf07d8312c97b4a02e25047d50 (diff) | |
trace: fix "-trace file=..."
Because trace_opt_parse always deletes the options it has parsed,
trace_init_file's call to qemu_find_opts_singleton always
creates an empty -trace option group. Therefore, the subsequent
qemu_opt_get(opts, "file") always returns NULL.
To fix this, save the last "-trace file=..." option in a global
variable and use it later in trace_init_file.
This is similar to what was done before commit 92eecfff32 ("trace:
remove argument from trace_init_file", 2020-11-11), except contained
within trace/control.c and without memory leaks.
Fixes: 92eecfff32 ("trace: remove argument from trace_init_file", 2020-11-11)
Cc: stefanha@redhat.com
Reported-by: armbru@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210209145759.141231-2-pbonzini@redhat.com>
Diffstat (limited to 'trace/control.c')
| -rw-r--r-- | trace/control.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/trace/control.c b/trace/control.c index cd04dd4e0c..4be38e1af2 100644 --- a/trace/control.c +++ b/trace/control.c @@ -40,6 +40,7 @@ static size_t nevent_groups; static uint32_t next_id; static uint32_t next_vcpu_id; static bool init_trace_on_startup; +static char *trace_opts_file; QemuOptsList qemu_trace_opts = { .name = "trace", @@ -224,10 +225,8 @@ static void trace_init_events(const char *fname) void trace_init_file(void) { - QemuOpts *opts = qemu_find_opts_singleton("trace"); - const char *file = qemu_opt_get(opts, "file"); #ifdef CONFIG_TRACE_SIMPLE - st_set_trace_file(file); + st_set_trace_file(trace_opts_file); if (init_trace_on_startup) { st_set_trace_file_enabled(true); } @@ -238,11 +237,11 @@ void trace_init_file(void) * backend. However we should only override -D if we actually have * something to override it with. */ - if (file) { - qemu_set_log_filename(file, &error_fatal); + if (trace_opts_file) { + qemu_set_log_filename(trace_opts_file, &error_fatal); } #else - if (file) { + if (trace_opts_file) { fprintf(stderr, "error: --trace file=...: " "option not supported by the selected tracing backends\n"); exit(1); @@ -303,6 +302,8 @@ void trace_opt_parse(const char *optarg) } trace_init_events(qemu_opt_get(opts, "events")); init_trace_on_startup = true; + g_free(trace_opts_file); + trace_opts_file = g_strdup(qemu_opt_get(opts, "file")); qemu_opts_del(opts); } |