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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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5
libc/log/backtrace2.c
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@ -37,6 +37,8 @@
#include "libc/mem/alg.h"
#include "libc/mem/bisectcarleft.internal.h"
#include "libc/nexgen32e/gc.internal.h"
#include "libc/nexgen32e/gettls.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/runtime/gc.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
@ -47,6 +49,7 @@
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/sig.h"
#include "libc/thread/thread.h"
#include "libc/x/x.h"
#define kBacktraceMaxFrames 128
@ -106,7 +109,7 @@ static int PrintBacktraceUsingAddr2line(int fd, const struct StackFrame *bp) {
argv[i++] = "-a"; /* filter out w/ shell script wrapper for old versions */
argv[i++] = "-pCife";
argv[i++] = debugbin;
garbage = weaken(__garbage);
garbage = __tls_enabled ? ((cthread_t)__get_tls())->garbages : 0;
gi = garbage ? garbage->i : 0;
for (frame = bp; frame && i < kBacktraceMaxFrames - 1; frame = frame->next) {
addr = frame->addr;