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Tidy up the threading implementation

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The organization of the source files is now much more rational.
Old experiments that didn't work out are now deleted. Naming of
things like files is now more intuitive.
This commit is contained in:
Justine Tunney 2022-09-10 02:56:25 -07:00
parent e9272f03fb
commit 155b378a39
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GPG key ID: BE714B4575D6E328
199 changed files with 526 additions and 685 deletions
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2
libc/nexgen32e/gc.S
View file

@ -34,7 +34,7 @@
// @see test/libc/runtime/gc_test.c
// @threadsafe
__gc: mov %fs:0,%rcx # __get_tls()
mov 0x18(%rcx),%rcx # cthread_t::garbages
mov 0x18(%rcx),%rcx # tls::garbages
decl (%rcx) # ++g->i
mov (%rcx),%r8d # r8 = g->i
mov 8(%rcx),%r9 # r9 = g->p

2
libc/nexgen32e/gclongjmp.S
View file

@ -35,7 +35,7 @@ _gclongjmp:
mov %rsp,%rbp
.profilable
mov %fs:0,%r12 # __get_tls()
mov 0x18(%r12),%r12 # cthread_t::garbages
mov 0x18(%r12),%r12 # Tls::garbages
test %r12,%r12
jz 0f
movl (%r12),%r13d # garbages.i

44
libc/nexgen32e/gettls.h
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@ -1,44 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_GETTLS_H_
#define COSMOPOLITAN_LIBC_NEXGEN32E_GETTLS_H_
#include "libc/dce.h"
#include "libc/nexgen32e/threaded.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
#if defined(__GNUC__) && defined(__x86_64__) && !defined(__STRICT_ANSI__)
/**
* Returns location of thread information block.
*
* This can't be used in privileged functions.
*/
static noasan inline char *__get_tls(void) {
char *tib;
asm("mov\t%%fs:0,%0" : "=r"(tib) : /* no inputs */ : "memory");
return tib;
}
#endif /* GNU x86-64 */
#if defined(__GNUC__) && defined(__x86_64__) && !defined(__STRICT_ANSI__)
/**
* Returns location of thread information block.
*
* This should be favored over __get_tls() for .privileged code that
* can't be self-modified by __enable_tls().
*/
static noasan inline char *__get_tls_privileged(void) {
char *tib, *lin = (char *)0x30;
if (IsLinux() || IsFreebsd() || IsNetbsd() || IsOpenbsd() || IsMetal()) {
asm("mov\t%%fs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
} else {
asm("mov\t%%gs:(%1),%0" : "=a"(tib) : "r"(lin) : "memory");
if (IsWindows()) {
tib = *(char **)(tib + 0x1480 + __tls_index * 8);
}
}
return tib;
}
#endif /* GNU x86-64 */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_GETTLS_H_ */

2
libc/nexgen32e/threaded.c
View file

@ -16,7 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/nexgen32e/threaded.h"
#include "libc/thread/tls.h"
/**
* Contains TID of main thread or 0 if threading isn't enabled.

16
libc/nexgen32e/threaded.h
View file

@ -1,16 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_THREADED_H_
#define COSMOPOLITAN_LIBC_NEXGEN32E_THREADED_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern int __threaded;
extern bool __tls_enabled;
extern unsigned __tls_index;
void TlsIsRequired(void);
void *__initialize_tls(char[64]);
void __install_tls(char[64]);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_THREADED_H_ */