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Make garbage collection thread safe

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- You can now use _gc(malloc()) in multithreaded programs
- This change fixes a bug where fork() on NT disabled TLS
- Fixed TLS code morphing on XNU/NT, for R8-R15 registers
This commit is contained in:
Justine Tunney 2022-09-08 02:33:01 -07:00
parent 571c2c3c69
commit 0e2b1bfeed
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GPG key ID: BE714B4575D6E328
37 changed files with 310 additions and 189 deletions
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3
libc/runtime/fork-nt.c
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@ -29,6 +29,7 @@
#include "libc/mem/alloca.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/nt2sysv.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/nt/console.h"
#include "libc/nt/createfile.h"
#include "libc/nt/enum/accessmask.h"
@ -88,7 +89,6 @@ static inline textwindows ssize_t ForkIo(int64_t h, char *p, size_t n,
static dontinline textwindows bool ForkIo2(int64_t h, void *buf, size_t n,
bool32 (*fn)(), const char *sf) {
ssize_t rc = ForkIo(h, buf, n, fn);
__tls_enabled = false; // prevent tls crash in kprintf
NTTRACE("%s(%ld, %p, %'zu) → %'zd% m", sf, h, buf, n, rc);
return rc != -1;
}
@ -98,6 +98,7 @@ static dontinline textwindows bool WriteAll(int64_t h, void *buf, size_t n) {
}
static textwindows dontinline void ReadOrDie(int64_t h, void *buf, size_t n) {
__tls_enabled = false; // prevent tls crash in kprintf
if (!ForkIo2(h, buf, n, ReadFile, "ReadFile")) {
AbortFork("ReadFile");
}