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util: Implement debug-threads for macOS 

macOS provides pthread_setname_np that doesn't have thread id argument.

Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Roman Bolshakov 2018-12-17 23:26:01 +03:00 committed by Peter Maydell
parent 16bf52346d
commit 479a57475e
3 changed files with 33 additions and 9 deletions
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32
configure vendored
View File

@ -3721,8 +3721,8 @@ if test "$mingw32" != yes -a "$pthread" = no; then
"Make sure to have the pthread libs and headers installed."
fi
# check for pthread_setname_np
pthread_setname_np=no
# check for pthread_setname_np with thread id
pthread_setname_np_w_tid=no
cat > $TMPC << EOF
#include <pthread.h>
@ -3736,7 +3736,24 @@ int main(void)
}
EOF
if compile_prog "" "$pthread_lib" ; then
pthread_setname_np=yes
pthread_setname_np_w_tid=yes
fi
# check for pthread_setname_np without thread id
pthread_setname_np_wo_tid=no
cat > $TMPC << EOF
#include <pthread.h>
static void *f(void *p) { pthread_setname_np("QEMU"); }
int main(void)
{
pthread_t thread;
pthread_create(&thread, 0, f, 0);
return 0;
}
EOF
if compile_prog "" "$pthread_lib" ; then
pthread_setname_np_wo_tid=yes
fi
##########################################
@ -6889,11 +6906,14 @@ fi
# Hold two types of flag:
# CONFIG_THREAD_SETNAME_BYTHREAD - we've got a way of setting the name on
# a thread we have a handle to
# CONFIG_PTHREAD_SETNAME_NP - A way of doing it on a particular
# CONFIG_PTHREAD_SETNAME_NP_W_TID - A way of doing it on a particular
# platform
if test "$pthread_setname_np" = "yes" ; then
if test "$pthread_setname_np_w_tid" = "yes" ; then
echo "CONFIG_THREAD_SETNAME_BYTHREAD=y" >> $config_host_mak
echo "CONFIG_PTHREAD_SETNAME_NP=y" >> $config_host_mak
echo "CONFIG_PTHREAD_SETNAME_NP_W_TID=y" >> $config_host_mak
elif test "$pthread_setname_np_wo_tid" = "yes" ; then
echo "CONFIG_THREAD_SETNAME_BYTHREAD=y" >> $config_host_mak
echo "CONFIG_PTHREAD_SETNAME_NP_WO_TID=y" >> $config_host_mak
fi
if test "$vxhs" = "yes" ; then

4
qemu-options.hx
View File

@ -538,8 +538,8 @@ ETEXI
DEF("name", HAS_ARG, QEMU_OPTION_name,
"-name string1[,process=string2][,debug-threads=on|off]\n"
" set the name of the guest\n"
" string1 sets the window title and string2 the process name (on Linux)\n"
" When debug-threads is enabled, individual threads are given a separate name (on Linux)\n"
" string1 sets the window title and string2 the process name\n"
" When debug-threads is enabled, individual threads are given a separate name\n"
" NOTE: The thread names are for debugging and not a stable API.\n",
QEMU_ARCH_ALL)
STEXI

6
util/qemu-thread-posix.c
View File

@ -484,12 +484,16 @@ static void *qemu_thread_start(void *args)
void *arg = qemu_thread_args->arg;
void *r;
#ifdef CONFIG_PTHREAD_SETNAME_NP
#ifdef CONFIG_THREAD_SETNAME_BYTHREAD
/* Attempt to set the threads name; note that this is for debug, so
* we're not going to fail if we can't set it.
*/
if (name_threads && qemu_thread_args->name) {
# if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID)
pthread_setname_np(pthread_self(), qemu_thread_args->name);
# elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID)
pthread_setname_np(qemu_thread_args->name);
# endif
}
#endif
g_free(qemu_thread_args->name);