Clean up more code

- Found some bugs in LLVM compiler-rt library
- The useless LIBC_STUBS package is now deleted
- Improve the overflow checking story even further
- Get chibicc tests working in MODE=dbg mode again
- The libc/isystem/ headers now have correctly named guards

libc/runtime/__stack_chk_fail.c

@@ -1,7 +1,7 @@
 /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
 │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
 ╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
 │                                                                              │
 │ Permission to use, copy, modify, and/or distribute this software for         │
 │ any purpose with or without fee is hereby granted, provided that the         │
@@ -16,8 +16,4 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/runtime/internal.h"
-
-void __stack_chk_fail_local(void) {
-  __stack_chk_fail();
-}
+#include "libc/runtime/runtime.h"

libc/runtime/isdynamicexecutable.c

@@ -64,7 +64,7 @@ bool _IsDynamicExecutable(const char *prog) {
     goto Finish;
   }
   for (i = 0; i < e->e_phnum; ++i) {
-    p = GetElfSegmentHeaderAddress(e, st.st_size, i);
+    p = GetElfProgramHeaderAddress(e, st.st_size, i);
     if (p->p_type == PT_INTERP || p->p_type == PT_DYNAMIC) {
       res = true;
       goto Finish;

libc/runtime/mmap.c

@@ -28,6 +28,7 @@
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/describeflags.internal.h"
 #include "libc/intrin/directmap.internal.h"
+#include "libc/intrin/kprintf.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/intrin/strace.internal.h"

libc/runtime/runtime.mk

@@ -42,7 +42,6 @@ LIBC_RUNTIME_A_DIRECTDEPS =				\
 	LIBC_NT_KERNEL32				\
 	LIBC_NT_SYNCHRONIZATION				\
 	LIBC_STR					\
-	LIBC_STUBS					\
 	LIBC_SYSV					\
 	LIBC_SYSV_CALLS					\
 	THIRD_PARTY_PUFF				\

libc/runtime/stackchkfail.c

@@ -1,24 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/kprintf.h"
-
-void __stack_chk_fail(void) {
-  kprintf("stack smashed\n");
-  __builtin_trap();
-}

libc/runtime/utmp.c

@@ -39,6 +39,10 @@ void updwtmp(const char *x, const struct utmp *y) {
 void updwtmpx(const char *x, const struct utmpx *y) {
 }
 
+struct utmpx *pututxline(const struct utmpx *p) {
+  return 0;
+}
+
 void setutxent(void) {
 }