Fix some bugs

libc/calls/getexecutablename.c

@@ -112,6 +112,7 @@ char *GetProgramExecutableName(void) {
         program_executable_name,
         program_executable_name + sizeof(program_executable_name));
     errno = e;
+    once = true;
   }
   return program_executable_name;
 }

libc/calls/wincrash_init.S

@@ -16,11 +16,14 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/dce.h"
 #include "libc/macros.internal.h"
 
 	.init.start 300,_init_wincrash
+#if !IsTiny()
 	mov	__wincrashearly(%rip),%rcx
 	ntcall	__imp_RemoveVectoredExceptionHandler
+#endif
 	pushpop	1,%rcx
 	ezlea	__wincrash_nt,dx
 	ntcall	__imp_AddVectoredExceptionHandler

libc/runtime/fork-nt.c

@@ -227,7 +227,9 @@ textwindows void WinMainForked(void) {
 
   // restore the crash reporting stuff
   if (weaken(__wincrash_nt)) {
-    RemoveVectoredExceptionHandler(__wincrashearly);
+    if (!IsTiny()) {
+      RemoveVectoredExceptionHandler(__wincrashearly);
+    }
     AddVectoredExceptionHandler(1, (void *)weaken(__wincrash_nt));
   }
   if (weaken(__onntconsoleevent_nt)) {

libc/runtime/winmain.greg.c

@@ -268,7 +268,9 @@ __msabi textwindows int64_t WinMain(int64_t hInstance, int64_t hPrevInstance,
   os = WINDOWS; /* madness https://news.ycombinator.com/item?id=21019722 */
   ts = rdtsc();
   __pid = GetCurrentProcessId();
+#if !IsTiny()
   __wincrashearly = AddVectoredExceptionHandler(1, (void *)OnEarlyWinCrash);
+#endif
   cmdline = GetCommandLine();
 #ifdef SYSDEBUG
   /* sloppy flag-only check for early initialization */