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

third_party/zlib/deflate.c

@@ -90,9 +90,11 @@ Invented 1990 Phillip Walter Katz\"");
  * Initializes hash table (avoiding 64K overflow for 16 bit systems).
  * prev[] will be initialized on the fly.
  */
-#define CLEAR_HASH(s)              \
-  s->head[s->hash_size - 1] = NIL; \
-  memset((Bytef *)s->head, 0, (s->hash_size - 1) * sizeof(*s->head));
+#define CLEAR_HASH(s)                                               \
+  do {                                                              \
+    s->head[s->hash_size - 1] = NIL;                                \
+    bzero((Bytef *)s->head, (s->hash_size - 1) * sizeof(*s->head)); \
+  } while (0)
 
 /**
  * Update header CRC with s->pending_buf[beg..s->pending - 1] bytes.
@@ -338,9 +340,9 @@ int deflateInit2(z_streamp strm, int level, int method, int windowBits,
 
   s->window =
       (Bytef *)ZALLOC(strm, s->w_size + window_padding, 2 * sizeof(Byte));
-  memset(s->window, 0, (s->w_size + window_padding) * (2 * sizeof(Byte)));
+  bzero(s->window, (s->w_size + window_padding) * (2 * sizeof(Byte)));
   s->prev = (Posf *)ZALLOC(strm, s->w_size, sizeof(Pos));
-  memset(s->prev, 0, s->w_size * sizeof(Pos));
+  bzero(s->prev, s->w_size * sizeof(Pos));
   s->head = (Posf *)ZALLOC(strm, s->hash_size, sizeof(Pos));
 
   s->high_water = 0; /* nothing written to s->window yet */

third_party/zlib/deflatesse.c

@@ -153,7 +153,7 @@ void fill_window_sse(struct DeflateState *s) {
        */
       init = s->window_size - curr;
       if (init > WIN_INIT) init = WIN_INIT;
-      memset(s->window + curr, 0, init);
+      bzero(s->window + curr, init);
       s->high_water = curr + init;
     } else if (s->high_water < (uint64_t)curr + WIN_INIT) {
       /* High water mark at or above current data, but below current data
@@ -163,7 +163,7 @@ void fill_window_sse(struct DeflateState *s) {
       init = (uint64_t)curr + WIN_INIT - s->high_water;
       if (init > s->window_size - s->high_water)
         init = s->window_size - s->high_water;
-      memset(s->window + s->high_water, 0, init);
+      bzero(s->window + s->high_water, init);
       s->high_water += init;
     }
   }

third_party/zlib/inflate.c

@@ -281,7 +281,7 @@ static void fixedtables(struct InflateState *state) {
   }
   state->lencode = lenfix;
   state->distcode = distfix;
-#else  /* !BUILDFIXED */
+#else /* !BUILDFIXED */
   state->lencode = kZlibLenfix;
   state->distcode = kZlibDistfix;
 #endif /* BUILDFIXED */
@@ -380,7 +380,7 @@ static int updatewindow(z_streamp strm, const Bytef *end, unsigned copy) {
        and is subsequently either overwritten or left deliberately
        undefined at the end of decode; so there's really no point.
      */
-    memset(state->window + wsize, 0, CHUNKCOPY_CHUNK_SIZE);
+    bezro(state->window + wsize, CHUNKCOPY_CHUNK_SIZE);
 #endif
   }