mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-22 21:32:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Implement swapcontext() and makecontext()

Browse source 
This change introduces support for Linux-style uc_context manipulation
that's fast and works well on all supported OSes and architectures. It
also integrates with the Cosmpolitan runtime which can show backtraces
comprised of multiple stacks and fibers. See the test and example code
for further details. This will be used by Mold once it's been vendored
This commit is contained in:
Justine Tunney 2023-07-02 03:50:29 -07:00
parent 7ec84655b4
commit 197aa0d465
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
28 changed files with 617 additions and 355 deletions
Download patch file Download diff file Expand all files Collapse all files

4
libc/runtime/clone.c
View file

@ -533,7 +533,7 @@ static int CloneLinux(int (*func)(void *arg, int rc), char *stk, size_t stksz,
* int worker(void *arg) { return 0; }
* struct CosmoTib tib = {.tib_self = &tib, .tib_tid = -1};
* atomic_int tid;
* char *stk = _mapstack();
* char *stk = NewCosmoStack();
* clone(worker, stk, GetStackSize() - 16,
* CLONE_VM | CLONE_THREAD | CLONE_FS | CLONE_FILES |
* CLONE_SYSVSEM | CLONE_SIGHAND | CLONE_PARENT_SETTID |
@ -545,7 +545,7 @@ static int CloneLinux(int (*func)(void *arg, int rc), char *stk, size_t stksz,
* // thread is running
* while (atomic_load(&tib.tib_tid) > 0) sched_yield();
* // thread has terminated
* _freestack(stk);
* FreeCosmoStack(stk);
*
* Threads are created in a detached manner. They currently can't be
* synchronized using wait() or posix signals. Threads created by this