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Make improvements

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- Make rand64() thread safe
- Introduce lemur64 lcg prng
- Improve strace on New Technology
- Improve msync() on New Technology
This commit is contained in:
Justine Tunney 2022-04-07 00:15:35 -07:00
parent 43ba3009b2
commit 29bf8b1a30
73 changed files with 888 additions and 269 deletions
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32
libc/runtime/clone.c
View file

@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/internal.h"
#include "libc/calls/sig.internal.h"
#include "libc/dce.h"
#include "libc/nexgen32e/nt2sysv.h"
#include "libc/nexgen32e/stackframe.h"
@ -24,6 +25,8 @@
#include "libc/nt/thread.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/nr.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/sicode.h"
#include "libc/sysv/errfuns.h"
struct WinThread {
@ -32,7 +35,7 @@ struct WinThread {
void *stack;
};
static noasan textwindows uint32_t winthread(void *param) {
static noasan textwindows uint32_t WinThreadMain(void *param) {
struct WinThread *wt = param;
asm volatile("mov\t%%rbp,%%r14\n\t"
"mov\t%%rsp,%%r15\n\t"
@ -50,15 +53,19 @@ static noasan textwindows uint32_t winthread(void *param) {
/**
* Creates thread.
*
* @note CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND creates thread
* @note CLONE_VFORK|CLONE_VM|SIGCHLD does vfork()
* @note SIGCHLD does fork()
* @param flags usually has one of
* - `CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND` for threads
* - `CLONE_VFORK|CLONE_VM|SIGCHLD` for vfork()
* - `SIGCHLD` for fork()
* as part high bytes, and the low order byte may optionally contain
* a signal e.g. SIGCHLD, to enable parent notification on terminate
*/
privileged int clone(int (*f)(void *), void *stack, int flags, void *arg, ...) {
int64_t h;
int tidfd;
va_list va;
intptr_t ax;
uint32_t tid;
int64_t hand;
int32_t *ptid;
register void *tls asm("r8");
register int32_t *ctid asm("r10");
@ -90,11 +97,16 @@ privileged int clone(int (*f)(void *), void *stack, int flags, void *arg, ...) {
: "memory");
unreachable;
} else if (IsWindows()) {
if (flags == (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND)) {
if ((h = CreateThread(0, PAGESIZE, NT2SYSV(winthread),
&(struct WinThread){f, arg, stack}, 0, &tid))) {
CloseHandle(h);
return tid;
if ((tidfd = __reservefd()) == -1) return -1;
if (flags == CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND) {
if ((hand = CreateThread(&kNtIsInheritable, 0, NT2SYSV(WinThreadMain),
&(struct WinThread){f, arg, stack}, 0, &tid))) {
// XXX: this should be tracked in a separate data structure
g_fds.p[tidfd].kind = kFdProcess;
g_fds.p[tidfd].handle = hand;
g_fds.p[tidfd].flags = O_CLOEXEC;
g_fds.p[tidfd].zombie = false;
return tidfd;
} else {
return -1;
}