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Detect pthread_getname_np explicitly.

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At least one libc (musl) defines pthread_setname_np without defining
pthread_getname_np. Detect the presence of each individually, rather than
inferring both must be defined if set is.
This commit is contained in:
David Carlier 2020-11-02 20:29:48 +00:00 committed by David Goldblatt
parent b3c5690b7e
commit 95f0a77fde
3 changed files with 41 additions and 1 deletions
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31
configure.ac
View File

@ -1745,6 +1745,37 @@ dnl Check if we have dlsym support.
if test "x${je_cv_pthread_setname_np}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_PTHREAD_SETNAME_NP], [ ])
fi
dnl Check if pthread_getname_np is not necessarily present despite
dnl the pthread_setname_np counterpart
JE_COMPILABLE([pthread_getname_np(3)], [
#include <pthread.h>
#include <stdlib.h>
], [
{
char *name = malloc(16);
pthread_getname_np(pthread_self(), name, 16);
free(name);
}
], [je_cv_pthread_getname_np])
if test "x${je_cv_pthread_getname_np}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_PTHREAD_GETNAME_NP], [ ])
fi
dnl Check if pthread_get_name_np is not necessarily present despite
dnl the pthread_set_name_np counterpart
JE_COMPILABLE([pthread_get_name_np(3)], [
#include <pthread.h>
#include <pthread_np.h>
#include <stdlib.h>
], [
{
char *name = malloc(16);
pthread_get_name_np(pthread_self(), name, 16);
free(name);
}
], [je_cv_pthread_get_name_np])
if test "x${je_cv_pthread_get_name_np}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_PTHREAD_GET_NAME_NP], [ ])
fi
fi
JE_APPEND_VS(CPPFLAGS, -D_REENTRANT)

6
include/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@ -85,6 +85,12 @@
/* Defined if pthread_setname_np(3) is available. */
#undef JEMALLOC_HAVE_PTHREAD_SETNAME_NP
/* Defined if pthread_getname_np(3) is available. */
#undef JEMALLOC_HAVE_PTHREAD_GETNAME_NP
/* Defined if pthread_get_name_np(3) is available. */
#undef JEMALLOC_HAVE_PTHREAD_GET_NAME_NP
/*
* Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available.
*/

5
src/prof_sys.c
View File

@ -292,8 +292,11 @@ void prof_unwind_init() {
static int
prof_sys_thread_name_read_impl(char *buf, size_t limit) {
#ifdef JEMALLOC_HAVE_PTHREAD_SETNAME_NP
#if defined(JEMALLOC_HAVE_PTHREAD_GETNAME_NP)
return pthread_getname_np(pthread_self(), buf, limit);
#elif defined(JEMALLOC_HAVE_PTHREAD_GET_NAME_NP)
pthread_get_name_np(pthread_self(), buf, limit);
return 0;
#else
return ENOSYS;
#endif