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| author | Stefan Hajnoczi | 2020-07-29 17:39:26 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2020-07-30 17:02:38 +0200 |
| commit | 000822441e34916991f7c03217dc24f38be49e50 (patch) | |
| tree | 4f2c9e89946396111e1fb17fb8822625c1893c21 /scripts/tracetool/backend | |
| parent | trace/simple: Allow enabling simple traces from command line (diff) | |
| download | qemu-000822441e34916991f7c03217dc24f38be49e50.tar.gz qemu-000822441e34916991f7c03217dc24f38be49e50.tar.xz qemu-000822441e34916991f7c03217dc24f38be49e50.zip | |
tracetool: carefully define SDT_USE_VARIADIC
The dtrace backend defines SDT_USE_VARIADIC as a workaround for a
conflict with a LTTng UST header file, which requires SDT_USE_VARIADIC
to be defined.
LTTng UST <lttng/tracepoint.h> breaks if included after generated dtrace
headers because SDT_USE_VARIADIC will already be defined:
#ifdef LTTNG_UST_HAVE_SDT_INTEGRATION
#define SDT_USE_VARIADIC <-- error, it's already defined
#include <sys/sdt.h>
Be more careful when defining SDT_USE_VARIADIC. This fixes the build
when both the dtrace and ust tracers are enabled at the same time.
Fixes: 27e08bab94f7c6ebe0b75938c98c394c969e3fd8 ("tracetool: work around ust <sys/sdt.h> include conflict")
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20200729153926.127083-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'scripts/tracetool/backend')
| -rw-r--r-- | scripts/tracetool/backend/dtrace.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/scripts/tracetool/backend/dtrace.py b/scripts/tracetool/backend/dtrace.py index b7fe4c1b50..fc0c8fc52f 100644 --- a/scripts/tracetool/backend/dtrace.py +++ b/scripts/tracetool/backend/dtrace.py @@ -44,11 +44,15 @@ def generate_h_begin(events, group): # require SDT_USE_VARIADIC to be defined. If dtrace includes <sys/sdt.h> # first without defining SDT_USE_VARIADIC then ust breaks because the # STAP_PROBEV() macro is not defined. + out('#ifndef SDT_USE_VARIADIC') out('#define SDT_USE_VARIADIC 1') + out('#endif') out('#include "%s"' % header, '') + out('#undef SDT_USE_VARIADIC') + # SystemTap defines <provider>_<name>_ENABLED() but other DTrace # implementations might not. for e in events: |