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Make detached threads work better

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This change adds a double linked list of threads, so that pthread_exit()
will know when it should call exit() from an orphaned child. This change
also improves ftrace and strace logging.
This commit is contained in:
Justine Tunney 2022-11-09 03:58:57 -08:00
parent b74d8c1acd
commit cee6871710
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GPG key ID: BE714B4575D6E328
37 changed files with 638 additions and 314 deletions
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34
libc/thread/posixthread.internal.h
View file

@ -5,14 +5,16 @@
#include "libc/runtime/runtime.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
#include "third_party/nsync/dll.h"
#define PT_OWNSTACK 1
#define PT_MAINTHREAD 2
#define PT_STATIC 2
#define PT_ASYNC 4
#define PT_NOCANCEL 8
#define PT_MASKED 16
#define PT_INCANCEL 32
#define PT_OPENBSD_KLUDGE 64
#define PT_EXITING 128
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
@ -66,14 +68,15 @@ struct PosixThread {
int flags; // 0x00: see PT_* constants
_Atomic(int) cancelled; // 0x04: thread has bad beliefs
_Atomic(enum PosixThreadStatus) status;
_Atomic(int) ptid; // transitions 0 → tid
void *(*start)(void *); // creation callback
void *arg; // start's parameter
void *rc; // start's return value
char *altstack; // thread sigaltstack
char *tls; // bottom of tls allocation
struct CosmoTib *tib; // middle of tls allocation
jmp_buf exiter; // for pthread_exit
_Atomic(int) ptid; // transitions 0 → tid
void *(*start)(void *); // creation callback
void *arg; // start's parameter
void *rc; // start's return value
char *altstack; // thread sigaltstack
char *tls; // bottom of tls allocation
struct CosmoTib *tib; // middle of tls allocation
nsync_dll_element_ list; // list of threads
jmp_buf exiter; // for pthread_exit
pthread_attr_t attr;
sigset_t sigmask;
struct _pthread_cleanup_buffer *cleanup;
@ -81,24 +84,19 @@ struct PosixThread {
typedef void (*atfork_f)(void);
extern struct PosixThread _pthread_main;
extern nsync_dll_list_ _pthread_list;
extern pthread_spinlock_t _pthread_lock;
extern _Atomic(pthread_key_dtor) _pthread_key_dtor[PTHREAD_KEYS_MAX] _Hide;
int _pthread_atfork(atfork_f, atfork_f, atfork_f) _Hide;
int _pthread_reschedule(struct PosixThread *) _Hide;
int _pthread_setschedparam_freebsd(int, int, const struct sched_param *) _Hide;
int _pthread_wait(struct PosixThread *) _Hide;
void _pthread_zombify(struct PosixThread *) _Hide;
void _pthread_free(struct PosixThread *) _Hide;
void _pthread_cleanup(struct PosixThread *) _Hide;
void _pthread_ungarbage(void) _Hide;
void _pthread_zombies_add(struct PosixThread *) _Hide;
void _pthread_zombies_purge(void) _Hide;
void _pthread_zombies_decimate(void) _Hide;
void _pthread_zombies_harvest(void) _Hide;
void _pthread_key_destruct(void) _Hide;
void _pthread_onfork_prepare(void) _Hide;
void _pthread_onfork_parent(void) _Hide;
void _pthread_onfork_child(void) _Hide;
void _pthread_ungarbage(void) _Hide;
int _pthread_cancel_sys(void) _Hide;
COSMOPOLITAN_C_END_