Profiler Take 2

runtime/bin/socket_macos.cc

Index: runtime/bin/socket_macos.cc
diff --git a/runtime/bin/socket_macos.cc b/runtime/bin/socket_macos.cc
index f626dff6057f735a6d1efe4dd7cfdbc710093337..50525e437eed1675329960266e64c9eab6cf9b0c 100644
--- a/runtime/bin/socket_macos.cc
+++ b/runtime/bin/socket_macos.cc
@@ -18,6 +18,7 @@
 #include "bin/fdutils.h"
 #include "bin/file.h"
 #include "bin/log.h"
+#include "bin/signal_blocker.h"
 #include "bin/socket.h"
 
 
@@ -106,6 +107,8 @@ intptr_t Socket::Available(intptr_t fd) {
 
 int Socket::Read(intptr_t fd, void* buffer, intptr_t num_bytes) {
   ASSERT(fd >= 0);
+  // Block profile interrupts while making I/O call.
+  ThreadSignalBlocker tsb(SIGPROF);
   ssize_t read_bytes = TEMP_FAILURE_RETRY(read(fd, buffer, num_bytes));
   ASSERT(EAGAIN == EWOULDBLOCK);
   if (read_bytes == -1 && errno == EWOULDBLOCK) {
@@ -121,6 +124,8 @@ int Socket::RecvFrom(intptr_t fd, void* buffer, intptr_t num_bytes,
                      RawAddr* addr) {
   ASSERT(fd >= 0);
   socklen_t addr_len = sizeof(addr->ss);
+  // Block profile interrupts while making I/O call.
+  ThreadSignalBlocker tsb(SIGPROF);
   ssize_t read_bytes =
       TEMP_FAILURE_RETRY(
           recvfrom(fd, buffer, num_bytes, 0, &addr->addr, &addr_len));
@@ -135,6 +140,8 @@ int Socket::RecvFrom(intptr_t fd, void* buffer, intptr_t num_bytes,
 
 int Socket::Write(intptr_t fd, const void* buffer, intptr_t num_bytes) {
   ASSERT(fd >= 0);
+  // Block profile interrupts while making I/O call.
+  ThreadSignalBlocker tsb(SIGPROF);
   ssize_t written_bytes = TEMP_FAILURE_RETRY(write(fd, buffer, num_bytes));
   ASSERT(EAGAIN == EWOULDBLOCK);
   if (written_bytes == -1 && errno == EWOULDBLOCK) {
@@ -149,6 +156,8 @@ int Socket::Write(intptr_t fd, const void* buffer, intptr_t num_bytes) {
 int Socket::SendTo(intptr_t fd, const void* buffer, intptr_t num_bytes,
                    RawAddr addr) {
   ASSERT(fd >= 0);
+  // Block profile interrupts while making I/O call.
+  ThreadSignalBlocker tsb(SIGPROF);
   ssize_t written_bytes =
       TEMP_FAILURE_RETRY(
           sendto(fd, buffer, num_bytes, 0,