| Message ID | e7c3ac0f4cbd0d0c1dd1d213cd2c871393bf1846.1295890311.git.chouteau@adacore.com |
|---|---|
| State | New |
| Headers | show |
On 01/24/2011 06:33 PM, Fabien Chouteau wrote: > This backend sends trace events to standard output during the emulation. > Any comments?
On Mon, Jan 24, 2011 at 5:33 PM, Fabien Chouteau <chouteau@adacore.com> wrote: > diff --git a/docs/tracing.txt b/docs/tracing.txt > index 963c504..de033ad 100644 > --- a/docs/tracing.txt > +++ b/docs/tracing.txt > @@ -133,6 +133,11 @@ source tree. It may not be as powerful as platform-specific or third-party > trace backends but it is portable. This is the recommended trace backend > unless you have specific needs for more advanced backends. > > +=== Stdio === > + > +The "stdio" backend sends trace events directly to standard output during > +emulation. > + This is a reasonable backend for development/debugging. It's just a small step from DPRINTF() and that might work well with people's existing development workflows. Since most other QEMU diagnostics go to stderr, please use it here too. Also please change the name to "stderr" so it is immediately obvious what this backend does. > @@ -236,6 +237,55 @@ linetoc_end_simple() > EOF > } > > +#STDIO > +linetoh_begin_stdio() > +{ > + return > +} > + > +linetoh_stdio() > +{ > + local name args argnamess argc fmt local name args argnames argc state fmt Stefan
On Mon, Jan 24, 2011 at 5:33 PM, Fabien Chouteau <chouteau@adacore.com> wrote: > @@ -236,6 +237,55 @@ linetoc_end_simple() > EOF > } > > +#STDIO > +linetoh_begin_stdio() > +{ > + return > +} > + > +linetoh_stdio() > +{ > + local name args argnamess argc fmt > + name=$(get_name "$1") > + args=$(get_args "$1") > + argnames=$(get_argnames "$1" ",") > + argc=$(get_argc "$1") > + state=$(get_state "$1") > + fmt=$(get_fmt "$1") > + > + if [ "$argc" -gt 0 ]; then > + argnames=", $argnames" > + fi > + > + cat <<EOF > +static inline void trace_$name($args) > +{ > + printf("$name $fmt\n" $argnames); Forgot to mention this but the generated header file needs to #include <stdio.h>. Stefan
diff --git a/configure b/configure index 210670c..2672f2a 100755 --- a/configure +++ b/configure @@ -907,7 +907,7 @@ echo " --enable-docs enable documentation build" echo " --disable-docs disable documentation build" echo " --disable-vhost-net disable vhost-net acceleration support" echo " --enable-vhost-net enable vhost-net acceleration support" -echo " --enable-trace-backend=B Trace backend nop simple ust dtrace" +echo " --enable-trace-backend=B Trace backend nop simple stdio ust dtrace" echo " --with-trace-file=NAME Full PATH,NAME of file to store traces" echo " Default:trace-<pid>" echo " --disable-spice disable spice" diff --git a/docs/tracing.txt b/docs/tracing.txt index 963c504..de033ad 100644 --- a/docs/tracing.txt +++ b/docs/tracing.txt @@ -133,6 +133,11 @@ source tree. It may not be as powerful as platform-specific or third-party trace backends but it is portable. This is the recommended trace backend unless you have specific needs for more advanced backends. +=== Stdio === + +The "stdio" backend sends trace events directly to standard output during +emulation. + ==== Monitor commands ==== * info trace diff --git a/scripts/tracetool b/scripts/tracetool index fce491c..01f81a1 100755 --- a/scripts/tracetool +++ b/scripts/tracetool @@ -19,6 +19,7 @@ Generate tracing code for a file on stdin. Backends: --nop Tracing disabled --simple Simple built-in backend + --stdio Stdio built-in backend --ust LTTng User Space Tracing backend --dtrace DTrace/SystemTAP backend @@ -236,6 +237,55 @@ linetoc_end_simple() EOF } +#STDIO +linetoh_begin_stdio() +{ + return +} + +linetoh_stdio() +{ + local name args argnamess argc fmt + name=$(get_name "$1") + args=$(get_args "$1") + argnames=$(get_argnames "$1" ",") + argc=$(get_argc "$1") + state=$(get_state "$1") + fmt=$(get_fmt "$1") + + if [ "$argc" -gt 0 ]; then + argnames=", $argnames" + fi + + cat <<EOF +static inline void trace_$name($args) +{ + printf("$name $fmt\n" $argnames); +} +EOF +} + +linetoh_end_stdio() +{ +return +} + +linetoc_begin_stdio() +{ +return +} + +linetoc_stdio() +{ +return +} + +linetoc_end_stdio() +{ +return +} +#END OF STDIO + # Clean up after UST headers which pollute the namespace ust_clean_namespace() { cat <<EOF @@ -546,7 +596,7 @@ targetarch= until [ -z "$1" ] do case "$1" in - "--nop" | "--simple" | "--ust" | "--dtrace") backend="${1#--}" ;; + "--nop" | "--simple" | "--stdio" | "--ust" | "--dtrace") backend="${1#--}" ;; "--binary") shift ; binary="$1" ;; "--target-arch") shift ; targetarch="$1" ;;
This backend sends trace events to standard output during the emulation. Signed-off-by: Fabien Chouteau <chouteau@adacore.com> --- configure | 2 +- docs/tracing.txt | 5 +++++ scripts/tracetool | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 57 insertions(+), 2 deletions(-)