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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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9
libc/log/backtrace3.c
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@ -16,21 +16,24 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/mem/bisectcarleft.internal.h"
#include "libc/assert.h"
#include "libc/intrin/weaken.h"
#include "libc/calls/calls.h"
#include "libc/fmt/fmt.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/weaken.h"
#include "libc/log/backtrace.internal.h"
#include "libc/macros.internal.h"
#include "libc/mem/bisectcarleft.internal.h"
#include "libc/nexgen32e/gc.internal.h"
#include "libc/nexgen32e/gettls.h"
#include "libc/nexgen32e/stackframe.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/runtime/memtrack.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/str/str.h"
#include "libc/thread/thread.h"
#define LIMIT 100
@ -54,7 +57,7 @@ noinstrument noasan int PrintBacktraceUsingSymbols(int fd,
struct Garbages *garbage;
const struct StackFrame *frame;
if (!bp) bp = __builtin_frame_address(0);
garbage = weaken(__garbage);
garbage = __tls_enabled ? ((cthread_t)__get_tls())->garbages : 0;
gi = garbage ? garbage->i : 0;
for (i = 0, frame = bp; frame; frame = frame->next) {
if (++i == LIMIT) {