Make numerous improvements

- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands

libc/calls/wait4.c

@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/calls/internal.h"
+#include "libc/calls/sysdebug.internal.h"
 #include "libc/calls/wait4.h"
 #include "libc/dce.h"
 #include "libc/intrin/asan.internal.h"
@@ -37,6 +38,7 @@
  */
 int wait4(int pid, int *opt_out_wstatus, int options,
           struct rusage *opt_out_rusage) {
+  int rc, ws;
   if (IsAsan() &&
       ((opt_out_wstatus &&
         !__asan_is_valid(opt_out_wstatus, sizeof(*opt_out_wstatus))) ||
@@ -44,9 +46,13 @@ int wait4(int pid, int *opt_out_wstatus, int options,
         !__asan_is_valid(opt_out_rusage, sizeof(*opt_out_rusage))))) {
     return efault();
   }
+  ws = 0;
   if (!IsWindows()) {
-    return sys_wait4(pid, opt_out_wstatus, options, opt_out_rusage);
+    rc = sys_wait4(pid, &ws, options, opt_out_rusage);
   } else {
-    return sys_wait4_nt(pid, opt_out_wstatus, options, opt_out_rusage);
+    rc = sys_wait4_nt(pid, &ws, options, opt_out_rusage);
   }
+  SYSDEBUG("waitpid(%d, [0x%x], %d) -> [%d]", pid, ws, options, rc);
+  if (opt_out_wstatus) *opt_out_wstatus = ws;
+  return rc;
 }