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PBD pthreads: allow unlimited stacksize

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This commit is contained in:
Robin Gareus 2024-09-28 02:46:23 +02:00
parent e8c67408bb
commit aeb4f925c6
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 43 additions and 39 deletions
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78
libs/pbd/pthread_utils.cc
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@ -74,6 +74,42 @@ PBD::notify_event_loops_about_thread_creation (pthread_t thread, const std::stri
ThreadCreatedWithRequestSize (thread, emitting_thread_name, request_count);
}
static size_t
pbd_stack_size ()
{
size_t rv = 0;
#if !defined PLATFORM_WINDOWS && defined __GLIBC__
size_t pt_min_stack = 16384;
#ifdef PTHREAD_STACK_MIN
pt_min_stack = PTHREAD_STACK_MIN;
#endif
void* handle = dlopen (NULL, RTLD_LAZY);
/* This function is internal (it has a GLIBC_PRIVATE) version, but
* available via weak symbol, or dlsym, and returns
*
* GLRO(dl_pagesize) + __static_tls_size + PTHREAD_STACK_MIN
*/
size_t (*__pthread_get_minstack) (const pthread_attr_t* attr) =
(size_t (*) (const pthread_attr_t*))dlsym (handle, "__pthread_get_minstack");
if (__pthread_get_minstack != NULL) {
pthread_attr_t attr;
pthread_attr_init (&attr);
rv = __pthread_get_minstack (&attr);
assert (rv >= pt_min_stack);
rv -= pt_min_stack;
pthread_attr_destroy (&attr);
}
dlclose (handle);
#endif
return rv;
}
struct ThreadStartWithName {
void* (*thread_work) (void*);
void* arg;
@ -129,7 +165,7 @@ pthread_create_and_store (string name, pthread_t* thread, void* (*start_routine)
/* set default stack size to sensible default for memlocking */
pthread_attr_init (&default_attr);
if (stacklimit > 0) {
pthread_attr_setstacksize (&default_attr, stacklimit);
pthread_attr_setstacksize (&default_attr, stacklimit + pbd_stack_size ());
}
ThreadStartWithName* ts = new ThreadStartWithName (start_routine, arg, name);
@ -216,42 +252,6 @@ pthread_cancel_one (pthread_t thread)
pthread_mutex_unlock (&thread_map_lock);
}
static size_t
pbd_stack_size ()
{
size_t rv = 0;
#if !defined PLATFORM_WINDOWS && defined __GLIBC__
size_t pt_min_stack = 16384;
#ifdef PTHREAD_STACK_MIN
pt_min_stack = PTHREAD_STACK_MIN;
#endif
void* handle = dlopen (NULL, RTLD_LAZY);
/* This function is internal (it has a GLIBC_PRIVATE) version, but
* available via weak symbol, or dlsym, and returns
*
* GLRO(dl_pagesize) + __static_tls_size + PTHREAD_STACK_MIN
*/
size_t (*__pthread_get_minstack) (const pthread_attr_t* attr) =
(size_t (*) (const pthread_attr_t*))dlsym (handle, "__pthread_get_minstack");
if (__pthread_get_minstack != NULL) {
pthread_attr_t attr;
pthread_attr_init (&attr);
rv = __pthread_get_minstack (&attr);
assert (rv >= pt_min_stack);
rv -= pt_min_stack;
pthread_attr_destroy (&attr);
}
dlclose (handle);
#endif
return rv;
}
int
pbd_pthread_create (
const size_t stacksize,
@ -263,7 +263,9 @@ pbd_pthread_create (
pthread_attr_t attr;
pthread_attr_init (&attr);
if (stacksize > 0) {
pthread_attr_setstacksize (&attr, stacksize + pbd_stack_size ());
}
rv = pthread_create (thread, &attr, start_routine, arg);
pthread_attr_destroy (&attr);
return rv;
@ -358,7 +360,9 @@ pbd_realtime_pthread_create (
pthread_attr_setschedparam (&attr, &parm);
pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
if (stacksize > 0) {
pthread_attr_setstacksize (&attr, stacksize + pbd_stack_size ());
}
rv = pthread_create (thread, &attr, start_routine, arg);
pthread_attr_destroy (&attr);
return rv;