Make exciting improvements

- Add Lua backtraces to redbean!
- Wipe serving keys after redbean forks
- Audit redbean to remove free via exit
- Log SSL client ciphersuite preferences
- Increase ASAN malloc() backtrace depth
- Make GetSslRoots() behave as a singleton
- Move leaks.c from LIBC_TESTLIB to LIBC_LOG
- Add undocumented %n to printf() for newlines
- Fix redbean memory leak reindexing inode change
- Fix redbean memory leak with Fetch() DNS object
- Restore original environ after __cxa_finalize()
- Make backtrace always work after __cxa_finalize()
- Introduce COUNTEXPR() diagnostic / benchmark tool
- Fix a few more instances of errno being clobbered
- Consolidate the ANSI color disabling internal APIs

examples/auto-memory-safety-crash.c

@@ -8,7 +8,10 @@
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
 #include "libc/bits/bits.h"
+#include "libc/dce.h"
 #include "libc/log/log.h"
+#include "libc/runtime/runtime.h"
+#include "libc/stdio/stdio.h"
 
 /**
  * ASAN static memory safety crash example.
@@ -40,11 +43,17 @@
  *     0x000000000040268d: cosmo at libc/runtime/cosmo.S:64
  *     0x00000000004021ae: _start at libc/crt/crt.S:77
  *
+ * @see libc/intrin/asancodes.h for meaning of G, etc. and negative numbers
+ * @see libc/nexgen32e/kcp437.S for meaning of symbols
  */
 
 char buffer[13] = "hello";
 
 int main(int argc, char *argv[]) {
+  if (!IsAsan()) {
+    printf("this example is intended for MODE=asan or MODE=dbg\n");
+    exit(1);
+  }
   ShowCrashReports(); /* not needed but yoinks appropriate symbols */
   int i = 13;
   asm("" : "+r"(i)); /* prevent compiler being smart */

examples/auto-memory-safety-crash2.c

@@ -8,8 +8,11 @@
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
 #include "libc/bits/bits.h"
+#include "libc/dce.h"
 #include "libc/log/log.h"
 #include "libc/mem/mem.h"
+#include "libc/runtime/runtime.h"
+#include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 
 /**
@@ -50,9 +53,15 @@
  *     0x000000000040270f: cosmo at libc/runtime/cosmo.S:64
  *     0x00000000004021ae: _start at libc/crt/crt.S:77
  *
+ * @see libc/intrin/asancodes.h for meaning of U, O, etc. and negative numbers
+ * @see libc/nexgen32e/kcp437.S for meaning of symbols
  */
 
 int main(int argc, char *argv[]) {
+  if (!IsAsan()) {
+    printf("this example is intended for MODE=asan or MODE=dbg\n");
+    exit(1);
+  }
   char *buffer;
   ShowCrashReports(); /* not needed but yoinks appropriate symbols */
   buffer = malloc(13);

examples/auto-memory-safety-crash3.c

@@ -8,8 +8,11 @@
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
 #include "libc/bits/bits.h"
+#include "libc/dce.h"
 #include "libc/log/log.h"
 #include "libc/mem/mem.h"
+#include "libc/runtime/runtime.h"
+#include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 
 /**
@@ -21,6 +24,10 @@
  */
 
 int main(int argc, char *argv[]) {
+  if (!IsAsan()) {
+    printf("this example is intended for MODE=asan or MODE=dbg\n");
+    exit(1);
+  }
   char *buffer;
   ShowCrashReports(); /* not needed but yoinks appropriate symbols */
   buffer = malloc(13);

examples/curl.c

@@ -240,19 +240,17 @@ int main(int argc, char *argv[]) {
    */
   mbedtls_ssl_config conf;
   mbedtls_ssl_context ssl;
-  mbedtls_x509_crt *cachain = 0;
   mbedtls_ctr_drbg_context drbg;
   if (usessl) {
     mbedtls_ssl_init(&ssl);
     mbedtls_ctr_drbg_init(&drbg);
     mbedtls_ssl_config_init(&conf);
-    cachain = GetSslRoots();
     CHECK_EQ(0, mbedtls_ctr_drbg_seed(&drbg, GetEntropy, 0, "justine", 7));
     CHECK_EQ(0, mbedtls_ssl_config_defaults(&conf, MBEDTLS_SSL_IS_CLIENT,
                                             MBEDTLS_SSL_TRANSPORT_STREAM,
                                             MBEDTLS_SSL_PRESET_DEFAULT));
     mbedtls_ssl_conf_authmode(&conf, authmode);
-    mbedtls_ssl_conf_ca_chain(&conf, cachain, 0);
+    mbedtls_ssl_conf_ca_chain(&conf, GetSslRoots(), 0);
     mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &drbg);
     if (!IsTiny()) mbedtls_ssl_conf_dbg(&conf, TlsDebug, 0);
     CHECK_EQ(0, mbedtls_ssl_setup(&ssl, &conf));
@@ -413,7 +411,6 @@ Finished:
     mbedtls_ssl_free(&ssl);
     mbedtls_ctr_drbg_free(&drbg);
     mbedtls_ssl_config_free(&conf);
-    mbedtls_x509_crt_free(cachain);
     mbedtls_ctr_drbg_free(&drbg);
   }