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Overhaul process spawning

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Justine Tunney 2023-09-10 08:12:43 -07:00
parent 99dc1281f5
commit 26e254fb4d
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GPG key ID: BE714B4575D6E328
96 changed files with 1848 additions and 1541 deletions
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45
libc/log/die.c
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@ -16,20 +16,18 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/atomic.h"
#include "libc/calls/calls.h"
#include "libc/calls/state.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/intrin/atomic.h"
#include "libc/errno.h"
#include "libc/intrin/describebacktrace.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/log/backtrace.internal.h"
#include "libc/log/internal.h"
#include "libc/log/libfatal.internal.h"
#include "libc/log/log.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/runtime.h"
#include "libc/thread/thread.h"
#include "libc/str/str.h"
#if SupportsMetal()
__static_yoink("_idt");
@ -37,29 +35,18 @@ __static_yoink("_idt");
/**
* Aborts process after printing a backtrace.
*
* If a debugger is present then this will trigger a breakpoint.
*/
relegated wontreturn void __die(void) {
/* asan runtime depends on this function */
int me, owner;
static atomic_int once;
owner = 0;
me = __tls_enabled ? __get_tls()->tib_tid : sys_gettid();
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, 0);
if (__vforked ||
atomic_compare_exchange_strong_explicit(
&once, &owner, me, memory_order_relaxed, memory_order_relaxed)) {
__restore_tty();
if (IsDebuggerPresent(false)) {
DebugBreak();
}
ShowBacktrace(2, __builtin_frame_address(0));
_Exit(77);
} else if (owner == me) {
kprintf("die failed while dying\n");
_Exit(79);
} else {
_Exit1(79);
}
relegated dontasan wontreturn void __die(void) {
// print vital error nubers reliably
// the surface are of code this calls is small and audited
kprintf("\r\n\e[1;31m__die %s pid %d tid %d bt %s\e[0m\n",
program_invocation_short_name, getpid(), sys_gettid(),
DescribeBacktrace(__builtin_frame_address(0)));
// print much friendlier backtrace less reliably
// we're in a broken runtime state and so much can go wrong
__restore_tty();
ShowBacktrace(2, __builtin_frame_address(0));
_Exit(77);
}