From 2508a0f3deb4d62b53d76734ca70ca294443629f Mon Sep 17 00:00:00 2001
From: Mark Benvenuto <mark.benvenuto@mongodb.com>
Date: Fri, 13 Nov 2015 15:50:56 -0500
Subject: SERVER-21216 Fix FreeBSD & OpenBSD compilation, add stack_locator

---
 src/mongo/platform/stack_locator_freebsd.cpp       | 31 +++++++++++++++++++++-
 src/mongo/platform/stack_locator_openbsd.cpp       | 27 ++++++++++++++++++-
 .../platform/stack_locator_pthread_getattr_np.cpp  |  7 ++---
 src/mongo/platform/stack_locator_unknown.cpp       |  2 +-
 src/mongo/util/net/hostname_canonicalization.cpp   |  1 +
 5 files changed, 62 insertions(+), 6 deletions(-)

diff --git a/src/mongo/platform/stack_locator_freebsd.cpp b/src/mongo/platform/stack_locator_freebsd.cpp
index af46f763783..f7f06abba25 100644
--- a/src/mongo/platform/stack_locator_freebsd.cpp
+++ b/src/mongo/platform/stack_locator_freebsd.cpp
@@ -26,4 +26,33 @@
  *    it in the license file.
  */
 
-#include "stack_locator_unknown.cpp"
+#include "mongo/platform/basic.h"
+
+#include "mongo/platform/stack_locator.h"
+
+#include <pthread.h>
+#include <pthread_np.h>
+
+#include "mongo/util/assert_util.h"
+#include "mongo/util/scopeguard.h"
+
+namespace mongo {
+
+StackLocator::StackLocator() {
+    pthread_attr_t attr;
+    size_t size;
+
+    pthread_t self = pthread_self();
+
+    invariant(pthread_attr_init(&attr) == 0);
+    ON_BLOCK_EXIT(pthread_attr_destroy, &attr);
+
+    invariant(pthread_attr_get_np(self, &attr) == 0);
+
+    invariant(pthread_attr_getstack(&attr, &_end, &size) == 0);
+
+    // TODO: Assumes stack grows downward on FreeBSD
+    _begin = static_cast<char*>(_end) + size;
+}
+
+}  // namespace mongo
diff --git a/src/mongo/platform/stack_locator_openbsd.cpp b/src/mongo/platform/stack_locator_openbsd.cpp
index af46f763783..014edeaa247 100644
--- a/src/mongo/platform/stack_locator_openbsd.cpp
+++ b/src/mongo/platform/stack_locator_openbsd.cpp
@@ -26,4 +26,29 @@
  *    it in the license file.
  */
 
-#include "stack_locator_unknown.cpp"
+#include "mongo/platform/basic.h"
+
+#include "mongo/platform/stack_locator.h"
+
+#include <pthread_np.h>
+#include <sys/signal.h>
+
+#include "mongo/util/assert_util.h"
+#include "mongo/util/scopeguard.h"
+
+namespace mongo {
+
+StackLocator::StackLocator() {
+    stack_t stack_info;
+
+    pthread_t self = pthread_self();
+
+    invariant(pthread_stackseg_np(self, &stack_info) == 0);
+
+    _begin = stack_info.ss_sp;
+
+    // TODO: Assumes stack grows downward on OpenBSD
+    _end = static_cast<char*>(_begin) - stack_info.ss_size;
+}
+
+}  // namespace mongo
diff --git a/src/mongo/platform/stack_locator_pthread_getattr_np.cpp b/src/mongo/platform/stack_locator_pthread_getattr_np.cpp
index 00961d06286..648d26a41cc 100644
--- a/src/mongo/platform/stack_locator_pthread_getattr_np.cpp
+++ b/src/mongo/platform/stack_locator_pthread_getattr_np.cpp
@@ -33,20 +33,21 @@
 #include <pthread.h>
 
 #include "mongo/util/assert_util.h"
+#include "mongo/util/scopeguard.h"
 
 namespace mongo {
 
 StackLocator::StackLocator() {
     pthread_t self = pthread_self();
     pthread_attr_t selfAttrs;
-    pthread_attr_init(&selfAttrs);
-    pthread_getattr_np(self, &selfAttrs);
+    invariant(pthread_attr_init(&selfAttrs) == 0);
+    invariant(pthread_getattr_np(self, &selfAttrs) == 0);
+    ON_BLOCK_EXIT(pthread_attr_destroy, &selfAttrs);
 
     void* base = nullptr;
     size_t size = 0;
 
     auto result = pthread_attr_getstack(&selfAttrs, &base, &size);
-    pthread_attr_destroy(&selfAttrs);
 
     invariant(result == 0);
     invariant(base != nullptr);
diff --git a/src/mongo/platform/stack_locator_unknown.cpp b/src/mongo/platform/stack_locator_unknown.cpp
index fd3fb62c993..8f5708a20ec 100644
--- a/src/mongo/platform/stack_locator_unknown.cpp
+++ b/src/mongo/platform/stack_locator_unknown.cpp
@@ -36,4 +36,4 @@ namespace mongo {
 
 StackLocator::StackLocator() = default;
 
-// namespace mongo
+}  // namespace mongo
diff --git a/src/mongo/util/net/hostname_canonicalization.cpp b/src/mongo/util/net/hostname_canonicalization.cpp
index afeeef45280..e7c0eecdcda 100644
--- a/src/mongo/util/net/hostname_canonicalization.cpp
+++ b/src/mongo/util/net/hostname_canonicalization.cpp
@@ -34,6 +34,7 @@
 
 #if !defined(_WIN32)
 #include <arpa/inet.h>
+#include <netinet/in.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
-- 
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