deps: upgrade libuv to 1.20.0

Notable changes:
- uv_fs_copyfile() adds support for copy-on-write behavior.
- uv_relative_path() now uses the long directory name
  for handle->dirw.
- File operations on files > 2 GB on 32-bit platforms are
  working again.
- uv_fs_fchmod() on Windows works on files with the
  Archive flag cleared.

Backport-PR-URL: #24103
Fixes: #19170
Fixes: #19455
Fixes: #12803
PR-URL: #19758
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: cjihrig

deps/uv/.mailmap

@@ -16,6 +16,7 @@ Frank Denis <github@pureftpd.org>
 Imran Iqbal <imrani@ca.ibm.com> <imran@imraniqbal.org>
 Isaac Z. Schlueter <i@izs.me>
 Jason Williams <necmon@yahoo.com>
+Jesse Gorzinski <jgorzinski@gmail.com>
 Justin Venus <justin.venus@gmail.com> <justin.venus@orbitz.com>
 Keno Fischer <kenof@stanford.edu> <kfischer+github@college.harvard.edu>
 Keno Fischer <kenof@stanford.edu> <kfischer@college.harvard.edu>

deps/uv/AUTHORS

@@ -330,3 +330,5 @@ Mason X <me@masonx.ca>
 Jesse Gorzinski <jgorzinski@gmail.com>
 Ryuichi KAWAMATA <ryuichi.kawamata@dena.jp>
 Joyee Cheung <joyeec9h3@gmail.com>
+Michael Kilburn <crusader.mike@gmail.com>
+Ruslan Bekenev <furyinbox@gmail.com>

deps/uv/ChangeLog

@@ -1,3 +1,53 @@
+2018.04.03, Version 1.20.0 (Stable), 0012178ee2b04d9e4a2c66c27cf8891ad8325ceb
+
+Changes since version 1.19.2:
+
+* unix,spawn: respect user stdio flags for new pipe (Jameson Nash)
+
+* Revert "Revert "unix,tcp: avoid marking server sockets connected"" (Jameson
+  Nash)
+
+* req: revisions to uv_req_t handling (Jameson Nash)
+
+* win: remove unnecessary initialization (cjihrig)
+
+* win: update uv_os_homedir() to use uv_os_getenv() (cjihrig)
+
+* test: fix tcp_oob test flakiness (Santiago Gimeno)
+
+* posix: fix uv__pollfds_del() for invalidated fd's (Jesse Gorzinski)
+
+* doc: README: add note on installing gyp (Jamie Davis)
+
+* unix: refactor uv_os_homedir to use uv_os_getenv (Santiago Gimeno)
+
+* unix: fix several instances of lost errno (Michael Kilburn)
+
+* win,tty: update several TODO comments (Ruslan Bekenev)
+
+* unix: add UV_FS_COPYFILE_FICLONE support (cjihrig)
+
+* test: fix connect_unspecified (Santiago Gimeno)
+
+* unix,win: add UV_FS_COPYFILE_FICLONE_FORCE support (cjihrig)
+
+* win: use long directory name for handle->dirw (Nicholas Vavilov)
+
+* build: build with -D_FILE_OFFSET_BITS=64 again (Ben Noordhuis)
+
+* win, fs: fix uv_fs_unlink for +R -A files (Bartosz Sosnowski)
+
+* win, fs: use FILE_WRITE_ATTRIBUTES when opening files (Bartosz Sosnowski)
+
+* unix: use __PASE__ on IBM i platforms (Jesse Gorzinski)
+
+* test,freebsd: fix flaky poll tests (Santiago Gimeno)
+
+* test: increase connection timeout to 1 second (jBarz)
+
+* win,tcp: handle canceled connect with ECANCELED (Jameson Nash)
+
+
 2018.02.22, Version 1.19.2 (Stable), c5afc37e2a8a70d8ab0da8dac10b77ba78c0488c
 
 Changes since version 1.19.1:

deps/uv/README.md

@@ -169,6 +169,12 @@ $ make check
 $ make install
 ```
 
+To build with GYP, first run:
+
+```bash
+$ git clone https://chromium.googlesource.com/external/gyp build/gyp
+```
+
 ### Windows
 
 Prerequisites:

deps/uv/checksparse.sh

@@ -184,7 +184,7 @@ AIX)
            src/unix/aix.c"
   ;;
 OS400)
-  SPARSE_FLAGS="$SPARSE_FLAGS -D_PASE=1"
+  SPARSE_FLAGS="$SPARSE_FLAGS -D__PASE__=1"
   SOURCES="$SOURCES
            src/unix/aix-common.c
            src/unix/ibmi.c

deps/uv/configure.ac

@@ -13,7 +13,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_PREREQ(2.57)
-AC_INIT([libuv], [1.19.2], [https://github.com/libuv/libuv/issues])
+AC_INIT([libuv], [1.20.0], [https://github.com/libuv/libuv/issues])
 AC_CONFIG_MACRO_DIR([m4])
 m4_include([m4/libuv-extra-automake-flags.m4])
 m4_include([m4/as_case.m4])

deps/uv/docs/src/fs.rst

@@ -249,6 +249,12 @@ API
     - `UV_FS_COPYFILE_EXCL`: If present, `uv_fs_copyfile()` will fail with
       `UV_EEXIST` if the destination path already exists. The default behavior
       is to overwrite the destination if it exists.
+    - `UV_FS_COPYFILE_FICLONE`: If present, `uv_fs_copyfile()` will attempt to
+      create a copy-on-write reflink. If the underlying platform does not
+      support copy-on-write, then a fallback copy mechanism is used.
+    - `UV_FS_COPYFILE_FICLONE_FORCE`: If present, `uv_fs_copyfile()` will
+      attempt to create a copy-on-write reflink. If the underlying platform does
+      not support copy-on-write, then an error is returned.
 
     .. warning::
         If the destination path is created, but an error occurs while copying
@@ -258,6 +264,9 @@ API
 
     .. versionadded:: 1.14.0
 
+    .. versionchanged:: 1.20.0 `UV_FS_COPYFILE_FICLONE` and
+        `UV_FS_COPYFILE_FICLONE_FORCE` are supported.
+
 .. c:function:: int uv_fs_sendfile(uv_loop_t* loop, uv_fs_t* req, uv_file out_fd, uv_file in_fd, int64_t in_offset, size_t length, uv_fs_cb cb)
 
     Limited equivalent to :man:`sendfile(2)`.

deps/uv/include/uv-unix.h

@@ -48,7 +48,7 @@
 # include "uv-linux.h"
 #elif defined (__MVS__)
 # include "uv-os390.h"
-#elif defined(_PASE)
+#elif defined(__PASE__)
 # include "uv-posix.h"
 #elif defined(_AIX)
 # include "uv-aix.h"

deps/uv/include/uv-version.h

@@ -31,8 +31,8 @@
  */
 
 #define UV_VERSION_MAJOR 1
-#define UV_VERSION_MINOR 19
-#define UV_VERSION_PATCH 2
+#define UV_VERSION_MINOR 20
+#define UV_VERSION_PATCH 0
 #define UV_VERSION_IS_RELEASE 1
 #define UV_VERSION_SUFFIX ""
 

deps/uv/include/uv.h

@@ -378,8 +378,7 @@ UV_EXTERN const char* uv_err_name(int err);
   /* read-only */                                                             \
   uv_req_type type;                                                           \
   /* private */                                                               \
-  void* active_queue[2];                                                      \
-  void* reserved[4];                                                          \
+  void* reserved[6];                                                          \
   UV_REQ_PRIVATE_FIELDS                                                       \
 
 /* Abstract base class of all requests. */
@@ -1191,6 +1190,18 @@ UV_EXTERN int uv_fs_write(uv_loop_t* loop,
  */
 #define UV_FS_COPYFILE_EXCL   0x0001
 
+/*
+ * This flag can be used with uv_fs_copyfile() to attempt to create a reflink.
+ * If copy-on-write is not supported, a fallback copy mechanism is used.
+ */
+#define UV_FS_COPYFILE_FICLONE 0x0002
+
+/*
+ * This flag can be used with uv_fs_copyfile() to attempt to create a reflink.
+ * If copy-on-write is not supported, an error is returned.
+ */
+#define UV_FS_COPYFILE_FICLONE_FORCE 0x0004
+
 UV_EXTERN int uv_fs_copyfile(uv_loop_t* loop,
                              uv_fs_t* req,
                              const char* path,
@@ -1531,7 +1542,10 @@ struct uv_loop_s {
   /* Loop reference counting. */
   unsigned int active_handles;
   void* handle_queue[2];
-  void* active_reqs[2];
+  union {
+    void* unused[2];
+    unsigned int count;
+  } active_reqs;
   /* Internal flag to signal loop stop. */
   unsigned int stop_flag;
   UV_LOOP_PRIVATE_FIELDS