Add support for symbol table in .com files

This change fixes minor bugs and adds a feature, which lets us store the
ELF symbol table, inside the ZIP directory. We use the path /zip/.symtab
which can be safely removed using a zip editing tool, to make the binary
smaller after compilation. This supplements the existing method of using
a separate .com.dbg file, which is still supported. The intent is people
don't always know that it's a good idea to download the debug file. It's
not great having someone's first experience be a crash report, that only
has numbers rather than symbols. This will help fix that!

libc/intrin/asan.c

@@ -40,6 +40,7 @@
 #include "libc/nt/enum/version.h"
 #include "libc/nt/runtime.h"
 #include "libc/runtime/directmap.internal.h"
+#include "libc/runtime/internal.h"
 #include "libc/runtime/memtrack.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/runtime/symbols.internal.h"
@@ -321,6 +322,7 @@ static void __asan_exit(void) {
   kprintf("your asan runtime needs%n"
           "\tSTATIC_YOINK(\"__die\");%n"
           "in order to show you backtraces%n");
+  __restorewintty();
   _Exit(99);
 }
 
@@ -1366,6 +1368,7 @@ textstartup void __asan_init(int argc, char **argv, char **envp,
   if (!cmpxchg(&once, false, true)) return;
   if (IsWindows() && NtGetVersion() < kNtVersionWindows10) {
     __write_str("error: asan binaries require windows10\r\n");
+    __restorewintty();
     _Exit(0); /* So `make MODE=dbg test` passes w/ Windows7 */
   }
   REQUIRE(_mmi);
@@ -1389,6 +1392,11 @@ textstartup void __asan_init(int argc, char **argv, char **envp,
   __asan_shadow_string_list(envp);
   __asan_shadow_auxv(auxv);
   __asan_install_malloc_hooks();
+  STRACE("    _    ____    _    _   _ ");
+  STRACE("   / \\  / ___|  / \\  | \\ | |");
+  STRACE("  / _ \\ \\___ \\ / _ \\ |  \\| |");
+  STRACE(" / ___ \\ ___) / ___ \\| |\\  |");
+  STRACE("/_/   \\_\\____/_/   \\_\\_| \\_|");
   STRACE("cosmopolitan memory safety module initialized");
 }
 

libc/intrin/quick_exit.c

@@ -26,9 +26,6 @@
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 
-uint32_t __winmainpid;
-const char kConsoleHandles[2] = {kNtStdInputHandle, kNtStdOutputHandle};
-
 /**
  * Exits process faster.
  *
@@ -36,14 +33,9 @@ const char kConsoleHandles[2] = {kNtStdInputHandle, kNtStdOutputHandle};
  * @noreturn
  */
 wontreturn void quick_exit(int exitcode) {
-  int i;
   const uintptr_t *p;
   STRACE("quick_exit(%d)", exitcode);
-  if (SupportsWindows() && GetCurrentProcessId() == __winmainpid) {
-    for (i = 0; i < 2; ++i) {
-      SetConsoleMode(GetStdHandle(kConsoleHandles[i]), __ntconsolemode[i]);
-    }
-  }
+  __restorewintty();
   if (weaken(fflush)) {
     weaken(fflush)(0);
   }

libc/intrin/restorewintty.greg.c

@@ -0,0 +1,39 @@
+/*-*- 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 2022 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/dce.h"
+#include "libc/nt/console.h"
+#include "libc/nt/process.h"
+#include "libc/nt/runtime.h"
+#include "libc/runtime/internal.h"
+
+uint32_t __winmainpid;
+const char kConsoleHandles[2] = {kNtStdInputHandle, kNtStdOutputHandle};
+
+/**
+ * Puts cmd.exe gui back the way it was.
+ */
+noasan void __restorewintty(void) {
+  int i;
+  if (IsWindows() && GetCurrentProcessId() == __winmainpid) {
+    for (i = 0; i < 2; ++i) {
+      SetConsoleMode(GetStdHandle(kConsoleHandles[i]), __ntconsolemode[i]);
+    }
+    __winmainpid = 0;
+  }
+}

libc/intrin/ubsan.c

@@ -20,6 +20,7 @@
 #include "libc/bits/pushpop.h"
 #include "libc/bits/weaken.h"
 #include "libc/calls/calls.h"
+#include "libc/calls/strace.internal.h"
 #include "libc/fmt/fmt.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/log/color.internal.h"
@@ -199,6 +200,7 @@ static void __ubsan_exit(void) {
   kprintf("your ubsan runtime needs%n"
           "\tSTATIC_YOINK(\"__die\");%n"
           "in order to show you backtraces%n");
+  __restorewintty();
   _Exit(99);
 }
 
@@ -594,3 +596,16 @@ void __ubsan_on_report(void) {
 void *__ubsan_get_current_report_data(void) {
   return 0;
 }
+
+static textstartup void ubsan_init() {
+  STRACE(" _   _ ____ ____    _    _   _");
+  STRACE("| | | | __ ) ___|  / \\  | \\ | |");
+  STRACE("| | | |  _ \\___ \\ / _ \\ |  \\| |");
+  STRACE("| |_| | |_) |__) / ___ \\| |\\  |");
+  STRACE(" \\___/|____/____/_/   \\_\\_| \\_|");
+  STRACE("cosmopolitan behavior module initialized");
+}
+
+const void *const ubsan_ctor[] initarray = {
+    ubsan_init,
+};