- Fix truncation in Socket calls.

runtime/bin/socket_macos.cc

Index: runtime/bin/socket_macos.cc
===================================================================
--- runtime/bin/socket_macos.cc	(revision 37036)
+++ runtime/bin/socket_macos.cc	(working copy)
@@ -103,7 +103,7 @@
 }
 
 
-int Socket::Read(intptr_t fd, void* buffer, intptr_t num_bytes) {
+intptr_t Socket::Read(intptr_t fd, void* buffer, intptr_t num_bytes) {
   ASSERT(fd >= 0);
   ssize_t read_bytes = TEMP_FAILURE_RETRY(read(fd, buffer, num_bytes));
   ASSERT(EAGAIN == EWOULDBLOCK);
@@ -116,7 +116,7 @@
 }
 
 
-int Socket::RecvFrom(intptr_t fd, void* buffer, intptr_t num_bytes,
+intptr_t Socket::RecvFrom(intptr_t fd, void* buffer, intptr_t num_bytes,
                      RawAddr* addr) {
   ASSERT(fd >= 0);
   socklen_t addr_len = sizeof(addr->ss);
@@ -131,7 +131,7 @@
 }
 
 
-int Socket::Write(intptr_t fd, const void* buffer, intptr_t num_bytes) {
+intptr_t Socket::Write(intptr_t fd, const void* buffer, intptr_t num_bytes) {
   ASSERT(fd >= 0);
   ssize_t written_bytes = TEMP_FAILURE_RETRY(write(fd, buffer, num_bytes));
   ASSERT(EAGAIN == EWOULDBLOCK);
@@ -144,7 +144,7 @@
 }
 
 
-int Socket::SendTo(intptr_t fd, const void* buffer, intptr_t num_bytes,
+intptr_t Socket::SendTo(intptr_t fd, const void* buffer, intptr_t num_bytes,
                    RawAddr addr) {
   ASSERT(fd >= 0);
   ssize_t written_bytes = TEMP_FAILURE_RETRY(