Update to libuv 1.20.1

CHANGES.rst

@@ -22,7 +22,7 @@
   ``close_fds`` is false (not the default), making process spawning up
   to 38 times faster. Initially reported in :issue:`1172` by Ofer Koren.
 
-- The bundled libuv is now 1.20, up from 1.19.2. See :issue:`1177`.
+- The bundled libuv is now 1.20.1, up from 1.19.2. See :issue:`1177`.
 
 - The long-deprecated and undocumented module ``gevent.wsgi`` was removed.
 

deps/libuv/AUTHORS

@@ -332,3 +332,7 @@ Ryuichi KAWAMATA <ryuichi.kawamata@dena.jp>
 Joyee Cheung <joyeec9h3@gmail.com>
 Michael Kilburn <crusader.mike@gmail.com>
 Ruslan Bekenev <furyinbox@gmail.com>
+Bob Burger <rgburger@beckman.com>
+Thomas Versteeg <thomasversteeg@gmx.com>
+zzzjim <zzzjim@users.noreply.github.com>
+Alex Arslan <ararslan@comcast.net>

deps/libuv/ChangeLog

-2018.04.03, Version 1.20.0 (Stable)
+2018.04.19, Version 1.20.1 (Stable)
+
+Changes since version 1.20.0:
+
+* doc,fs: improve documentation (Bob Burger)
+
+* win: return a floored double from uv_uptime() (Refael Ackermann)
+
+* doc: clarify platform specific pipe naming (Thomas Versteeg)
+
+* unix: fix uv_pipe_chmod() on macOS (zzzjim)
+
+* unix: work around glibc semaphore race condition (Anna Henningsen)
+
+* tcp,openbsd: disable Unix TCP check for IPV6_ONLY (Alex Arslan)
+
+* test,openbsd: use RETURN_SKIP in UDP IPv6 tests (Alex Arslan)
+
+* test,openbsd: fix multicast test (Alex Arslan)
+
+* Revert "win, fs: use FILE_WRITE_ATTRIBUTES when opening files" (cjihrig)
+
+
+2018.04.03, Version 1.20.0 (Stable), 0012178ee2b04d9e4a2c66c27cf8891ad8325ceb
 
 Changes since version 1.19.2:
 

deps/libuv/configure.ac

@@ -13,7 +13,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_PREREQ(2.57)
-AC_INIT([libuv], [1.20.0], [https://github.com/libuv/libuv/issues])
+AC_INIT([libuv], [1.20.1], [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/libuv/include/uv-version.h

@@ -32,7 +32,7 @@
 
 #define UV_VERSION_MAJOR 1
 #define UV_VERSION_MINOR 20
-#define UV_VERSION_PATCH 0
+#define UV_VERSION_PATCH 1
 #define UV_VERSION_IS_RELEASE 1
 #define UV_VERSION_SUFFIX ""
 

deps/libuv/src/unix/pipe.c

@@ -319,21 +319,6 @@ int uv_pipe_chmod(uv_pipe_t* handle, int mode) {
       mode != (UV_WRITABLE | UV_READABLE))
     return UV_EINVAL;
 
-  if (fstat(uv__stream_fd(handle), &pipe_stat) == -1)
-    return UV__ERR(errno);
-
-  desired_mode = 0;
-  if (mode & UV_READABLE)
-    desired_mode |= S_IRUSR | S_IRGRP | S_IROTH;
-  if (mode & UV_WRITABLE)
-    desired_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
-
-  /* Exit early if pipe already has desired mode. */
-  if ((pipe_stat.st_mode & desired_mode) == desired_mode)
-    return 0;
-
-  pipe_stat.st_mode |= desired_mode;
-
   /* Unfortunately fchmod does not work on all platforms, we will use chmod. */
   name_len = 0;
   r = uv_pipe_getsockname(handle, NULL, &name_len);
@@ -350,6 +335,26 @@ int uv_pipe_chmod(uv_pipe_t* handle, int mode) {
     return r;
   }
 
+  /* stat must be used as fstat has a bug on Darwin */
+  if (stat(name_buffer, &pipe_stat) == -1) {
+    uv__free(name_buffer);
+    return -errno;
+  }
+
+  desired_mode = 0;
+  if (mode & UV_READABLE)
+    desired_mode |= S_IRUSR | S_IRGRP | S_IROTH;
+  if (mode & UV_WRITABLE)
+    desired_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
+
+  /* Exit early if pipe already has desired mode. */
+  if ((pipe_stat.st_mode & desired_mode) == desired_mode) {
+    uv__free(name_buffer);
+    return 0;
+  }
+
+  pipe_stat.st_mode |= desired_mode;
+
   r = chmod(name_buffer, pipe_stat.st_mode);
   uv__free(name_buffer);
 

deps/libuv/src/unix/tcp.c

@@ -164,6 +164,7 @@ int uv__tcp_bind(uv_tcp_t* tcp,
   if (setsockopt(tcp->io_watcher.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)))
     return UV__ERR(errno);
 
+#ifndef __OpenBSD__
 #ifdef IPV6_V6ONLY
   if (addr->sa_family == AF_INET6) {
     on = (flags & UV_TCP_IPV6ONLY) != 0;
@@ -179,6 +180,7 @@ int uv__tcp_bind(uv_tcp_t* tcp,
       return UV__ERR(errno);
     }
   }
+#endif
 #endif
 
   errno = 0;

deps/libuv/src/unix/thread.c

@@ -37,6 +37,10 @@
 #include <sys/sem.h>
 #endif
 
+#ifdef __GLIBC__
+#include <gnu/libc-version.h>  /* gnu_get_libc_version() */
+#endif
+
 #undef NANOSEC
 #define NANOSEC ((uint64_t) 1e9)
 
@@ -502,26 +506,138 @@ int uv_sem_trywait(uv_sem_t* sem) {
 
 #else /* !(defined(__APPLE__) && defined(__MACH__)) */
 
-int uv_sem_init(uv_sem_t* sem, unsigned int value) {
+#ifdef __GLIBC__
+
+/* Hack around https://sourceware.org/bugzilla/show_bug.cgi?id=12674
+ * by providing a custom implementation for glibc < 2.21 in terms of other
+ * concurrency primitives.
+ * Refs: https://github.com/nodejs/node/issues/19903 */
+
+/* To preserve ABI compatibility, we treat the uv_sem_t as storage for
+ * a pointer to the actual struct we're using underneath. */
+
+static uv_once_t glibc_version_check_once = UV_ONCE_INIT;
+static int glibc_needs_custom_semaphore = 0;
+
+static void glibc_version_check(void) {
+  const char* version = gnu_get_libc_version();
+  glibc_needs_custom_semaphore =
+      version[0] == '2' && version[1] == '.' &&
+      atoi(version + 2) < 21;
+}
+
+#else /* !defined(__GLIBC__) */
+
+#define glibc_needs_custom_semaphore 0
+
+#endif
+
+typedef struct uv_semaphore_s {
+  uv_mutex_t mutex;
+  uv_cond_t cond;
+  unsigned int value;
+} uv_semaphore_t;
+
+
+STATIC_ASSERT(sizeof(uv_sem_t) >= sizeof(uv_semaphore_t*));
+
+static int uv__custom_sem_init(uv_sem_t* sem_, unsigned int value) {
+  int err;
+  uv_semaphore_t* sem;
+
+  sem = uv__malloc(sizeof(*sem));
+  if (sem == NULL)
+    return UV_ENOMEM;
+
+  if ((err = uv_mutex_init(&sem->mutex)) != 0) {
+    uv__free(sem);
+    return err;
+  }
+
+  if ((err = uv_cond_init(&sem->cond)) != 0) {
+    uv_mutex_destroy(&sem->mutex);
+    uv__free(sem);
+    return err;
+  }
+
+  sem->value = value;
+  *(uv_semaphore_t**)sem_ = sem;
+  return 0;
+}
+
+
+static void uv__custom_sem_destroy(uv_sem_t* sem_) {
+  uv_semaphore_t* sem;
+
+  sem = *(uv_semaphore_t**)sem_;
+  uv_cond_destroy(&sem->cond);
+  uv_mutex_destroy(&sem->mutex);
+  uv__free(sem);
+}
+
+
+static void uv__custom_sem_post(uv_sem_t* sem_) {
+  uv_semaphore_t* sem;
+
+  sem = *(uv_semaphore_t**)sem_;
+  uv_mutex_lock(&sem->mutex);
+  sem->value++;
+  if (sem->value == 1)
+    uv_cond_signal(&sem->cond);
+  uv_mutex_unlock(&sem->mutex);
+}
+
+
+static void uv__custom_sem_wait(uv_sem_t* sem_) {
+  uv_semaphore_t* sem;
+
+  sem = *(uv_semaphore_t**)sem_;
+  uv_mutex_lock(&sem->mutex);
+  while (sem->value == 0)
+    uv_cond_wait(&sem->cond, &sem->mutex);
+  sem->value--;
+  uv_mutex_unlock(&sem->mutex);
+}
+
+
+static int uv__custom_sem_trywait(uv_sem_t* sem_) {
+  uv_semaphore_t* sem;
+
+  sem = *(uv_semaphore_t**)sem_;
+  if (uv_mutex_trylock(&sem->mutex) != 0)
+    return UV_EAGAIN;
+
+  if (sem->value == 0) {
+    uv_mutex_unlock(&sem->mutex);
+    return UV_EAGAIN;
+  }
+
+  sem->value--;
+  uv_mutex_unlock(&sem->mutex);
+
+  return 0;
+}
+
+static int uv__sem_init(uv_sem_t* sem, unsigned int value) {
   if (sem_init(sem, 0, value))
     return UV__ERR(errno);
   return 0;
 }
 
 
-void uv_sem_destroy(uv_sem_t* sem) {
+static void uv__sem_destroy(uv_sem_t* sem) {
   if (sem_destroy(sem))
     abort();
 }
 
 
-void uv_sem_post(uv_sem_t* sem) {
+static void uv__sem_post(uv_sem_t* sem) {
   if (sem_post(sem))
     abort();
 }
 
 
-void uv_sem_wait(uv_sem_t* sem) {
+static void uv__sem_wait(uv_sem_t* sem) {
   int r;
 
   do
@@ -533,7 +649,7 @@ void uv_sem_wait(uv_sem_t* sem) {
 }
 
 
-int uv_sem_trywait(uv_sem_t* sem) {
+static int uv__sem_trywait(uv_sem_t* sem) {
   int r;
 
   do
@@ -549,6 +665,49 @@ int uv_sem_trywait(uv_sem_t* sem) {
   return 0;
 }
 
+int uv_sem_init(uv_sem_t* sem, unsigned int value) {
+#ifdef __GLIBC__
+  uv_once(&glibc_version_check_once, glibc_version_check);
+#endif
+
+  if (glibc_needs_custom_semaphore)
+    return uv__custom_sem_init(sem, value);
+  else
+    return uv__sem_init(sem, value);
+}
+
+
+void uv_sem_destroy(uv_sem_t* sem) {
+  if (glibc_needs_custom_semaphore)
+    uv__custom_sem_destroy(sem);
+  else
+    uv__sem_destroy(sem);
+}
+
+
+void uv_sem_post(uv_sem_t* sem) {
+  if (glibc_needs_custom_semaphore)
+    uv__custom_sem_post(sem);
+  else
+    uv__sem_post(sem);
+}
+
+
+void uv_sem_wait(uv_sem_t* sem) {
+  if (glibc_needs_custom_semaphore)
+    uv__custom_sem_wait(sem);
+  else
+    uv__sem_wait(sem);
+}
+
+
+int uv_sem_trywait(uv_sem_t* sem) {
+  if (glibc_needs_custom_semaphore)
+    return uv__custom_sem_trywait(sem);
+  else
+    return uv__sem_trywait(sem);
+}
+
 #endif /* defined(__APPLE__) && defined(__MACH__) */
 
 

deps/libuv/src/win/fs.c

@@ -434,8 +434,6 @@ void fs__open(uv_fs_t* req) {
     access |= FILE_APPEND_DATA;
   }
 
-  access |= FILE_WRITE_ATTRIBUTES;
-
   /*
    * Here is where we deviate significantly from what CRT's _open()
    * does. We indiscriminately use all the sharing modes, to match

deps/libuv/src/win/util.c

@@ -587,8 +587,8 @@ int uv_uptime(double* uptime) {
         BYTE* address = (BYTE*) object_type + object_type->DefinitionLength +
                         counter_definition->CounterOffset;
         uint64_t value = *((uint64_t*) address);
-        *uptime = (double) (object_type->PerfTime.QuadPart - value) /
-                  (double) object_type->PerfFreq.QuadPart;
+        *uptime = floor((double) (object_type->PerfTime.QuadPart - value) /
+                        (double) object_type->PerfFreq.QuadPart);
         uv__free(malloced_buffer);
         return 0;
       }