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Bring back gc() function

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Renaming gc() to _gc() was a mistake since the better thing to do is put
it behind the _COSMO_SOURCE macro. We need this change because I haven't
wanted to use my amazing garbage collector ever since we renamed it. You
now need to define _COSMO_SOURCE yourself when using amalgamation header
and cosmocc users need to pass the -mcosmo flag to get the gc() function

Some other issues relating to cancelation have been fixed along the way.
We're also now putting cosmocc in a folder named `.cosmocc` so it can be
more safely excluded by grep --exclude-dir=.cosmocc --exclude-dir=o etc.
This commit is contained in:
Justine Tunney 2024-01-08 10:07:35 -08:00
parent 6cb0354e19
commit a4b455185b
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GPG key ID: BE714B4575D6E328
280 changed files with 1362 additions and 1407 deletions
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4
libc/thread/posixthread.internal.h
View file

@ -116,11 +116,11 @@ void _pthread_unref(struct PosixThread *);
void _pthread_unwind(struct PosixThread *);
void _pthread_zombify(struct PosixThread *);
__funline pureconst struct PosixThread *_pthread_self(void) {
forceinline pureconst struct PosixThread *_pthread_self(void) {
return (struct PosixThread *)__get_tls()->tib_pthread;
}
__funline void _pthread_ref(struct PosixThread *pt) {
forceinline void _pthread_ref(struct PosixThread *pt) {
atomic_fetch_add_explicit(&pt->pt_refs, 1, memory_order_relaxed);
}

2
libc/thread/pthread_cancel.c
View file

@ -291,7 +291,7 @@ static errno_t _pthread_cancel_everyone(void) {
* Consider using Cosmopolitan Libc's garbage collector since it will be
* executed when a thread exits due to a cancelation.
*
* void *p = _gc(malloc(123));
* void *p = gc(malloc(123));
* read(0, p, 123);
*
* It's possible to put a thread in asynchronous cancelation mode with

4
libc/thread/pthread_exit.c
View file

@ -84,8 +84,8 @@ void _pthread_unkey(struct CosmoTib *tib) {
* the callback function that was supplied to pthread_create(). This may
* be used if the thread wishes to exit at any other point in the thread
* lifecycle, in which case this function is responsible for ensuring we
* invoke _gc(), _defer(), and pthread_cleanup_push() callbacks, as well
* as pthread_key_create() destructors.
* invoke gc(), _defer(), and pthread_cleanup_push() callbacks, and also
* pthread_key_create() destructors.
*
* If the current thread is an orphaned thread, or is the main thread
* when no other threads were created, then this will terminated your

2
libc/thread/tls.h
View file

@ -65,7 +65,7 @@ void __set_tls(struct CosmoTib *);
*
* This can't be used in privileged functions.
*/
__funline pureconst struct CosmoTib *__get_tls(void) {
forceinline pureconst struct CosmoTib *__get_tls(void) {
#ifdef __chibicc__
return 0;
#elif __x86_64__

6
libc/thread/tls2.internal.h
View file

@ -11,7 +11,7 @@ COSMOPOLITAN_C_START_
* This should be favored over __get_tls() for .privileged code that
* can't be self-modified by __enable_tls().
*/
__funline struct CosmoTib *__get_tls_privileged(void) {
forceinline struct CosmoTib *__get_tls_privileged(void) {
char *tib, *lin = (char *)0x30;
if (IsLinux() || IsFreebsd() || IsNetbsd() || IsOpenbsd() || IsMetal()) {
if (!__tls_morphed) {
@ -28,14 +28,14 @@ __funline struct CosmoTib *__get_tls_privileged(void) {
return (struct CosmoTib *)tib;
}
__funline struct CosmoTib *__get_tls_win32(void) {
forceinline struct CosmoTib *__get_tls_win32(void) {
char *tib, *lin = (char *)0x30;
asm("mov\t%%gs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
tib = *(char **)(tib + 0x1480 + __tls_index * 8);
return (struct CosmoTib *)tib;
}
__funline void __set_tls_win32(void *tls) {
forceinline void __set_tls_win32(void *tls) {
asm("mov\t%1,%%gs:%0" : "=m"(*((long *)0x1480 + __tls_index)) : "r"(tls));
}