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

tool/build/lib/syscall.c

@@ -470,7 +470,7 @@ static int AppendIovsGuest(struct Machine *m, struct Iovs *iv, int64_t iovaddr,
 static struct sigaction *CoerceSigactionToCosmo(
     struct sigaction *dst, const struct sigaction_linux *src) {
   if (!src) return NULL;
-  memset(dst, 0, sizeof(*dst));
+  bzero(dst, sizeof(*dst));
   ASSIGN(dst->sa_handler, src->sa_handler);
   ASSIGN(dst->sa_restorer, src->sa_restorer);
   ASSIGN(dst->sa_flags, src->sa_flags);
@@ -481,7 +481,7 @@ static struct sigaction *CoerceSigactionToCosmo(
 static struct sigaction_linux *CoerceSigactionToLinux(
     struct sigaction_linux *dst, const struct sigaction *src) {
   if (!dst) return NULL;
-  memset(dst, 0, sizeof(*dst));
+  bzero(dst, sizeof(*dst));
   ASSIGN(dst->sa_handler, src->sa_handler);
   ASSIGN(dst->sa_restorer, src->sa_restorer);
   ASSIGN(dst->sa_flags, src->sa_flags);
@@ -1179,7 +1179,7 @@ static int OpSigsuspend(struct Machine *m, int64_t maskaddr) {
   void *p;
   sigset_t mask;
   if (!(p = LoadBuf(m, maskaddr, 8))) return efault();
-  memset(&mask, 0, sizeof(mask));
+  bzero(&mask, sizeof(mask));
   memcpy(&mask, p, 8);
   return sigsuspend(&mask);
 }
@@ -1246,7 +1246,7 @@ static int OpSigprocmask(struct Machine *m, int how, int64_t setaddr,
   sigset_t *set, oldset, ss;
   if (setaddr) {
     set = &ss;
-    memset(set, 0, sizeof(ss));
+    bzero(set, sizeof(ss));
     VirtualSendRead(m, set, setaddr, 8);
   } else {
     set = NULL;
@@ -1326,6 +1326,9 @@ static int DoAccept(struct Machine *m, int fd, int64_t addraddr,
 void OpSyscall(struct Machine *m, uint32_t rde) {
   uint64_t i, ax, di, si, dx, r0, r8, r9;
   ax = Read64(m->ax);
+  if (m->ismetal) {
+    WARNF("metal syscall 0x%03x", ax);
+  }
   di = Read64(m->di);
   si = Read64(m->si);
   dx = Read64(m->dx);
@@ -1440,7 +1443,7 @@ void OpSyscall(struct Machine *m, uint32_t rde) {
     SYSCALL(0x177, vmsplice(di, P(si), dx, r0));
     CASE(0xE7, HaltMachine(m, di | 0x100));
     default:
-      VERBOSEF("missing syscall 0x%03x", ax);
+      WARNF("missing syscall 0x%03x", ax);
       ax = enosys();
       break;
   }