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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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22
libc/log/printgarbage.c
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@ -20,8 +20,11 @@
#include "libc/intrin/kprintf.h"
#include "libc/log/log.h"
#include "libc/nexgen32e/gc.internal.h"
#include "libc/nexgen32e/gettls.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/stdio/stdio.h"
/* clang-format off */
#include "libc/thread/thread.h"
// clang-format off
/**
* Prints list of deferred operations on shadow stack.
@ -30,24 +33,25 @@ void PrintGarbage(void) {
size_t i;
char name[19];
const char *symbol;
struct Garbages *g;
kprintf("\n");
kprintf(" SHADOW STACK @ %p\n", __builtin_frame_address(0));
kprintf("garbage ent. parent frame original ret callback arg \n");
kprintf("------------ ------------ ------------------ ------------------ ------------------\n");
if (__garbage.i) {
for (i = __garbage.i; i--;) {
symbol = __get_symbol_by_addr(__garbage.p[i].ret);
if ((g = __tls_enabled ? ((cthread_t)__get_tls())->garbages:0) && g->i) {
for (i = g->i; i--;) {
symbol = __get_symbol_by_addr(g->p[i].ret);
if (symbol) {
ksnprintf(name, sizeof(name), "%s", symbol);
} else {
ksnprintf(name, sizeof(name), "%#014lx", __garbage.p[i].ret);
ksnprintf(name, sizeof(name), "%#014lx", g->p[i].ret);
}
kprintf("%12lx %12lx %18s %18s %#18lx\n",
__garbage.p + i,
__garbage.p[i].frame,
g->p + i,
g->p[i].frame,
name,
__get_symbol_by_addr(__garbage.p[i].fn),
__garbage.p[i].arg);
__get_symbol_by_addr(g->p[i].fn),
g->p[i].arg);
}
} else {
kprintf("%12s %12s %18s %18s %18s\n","empty","-","-","-","-");