Reland r65996. Disallows Singletons on non-joinable thread.

Test breakages caused by this change have been fixed here or in other changelists.

BUG=61753
TEST=none

Review URL: http://codereview.chromium.org/5024003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@66719 0039d316-1c4b-4281-b951-d872f2087c98

8 files changed, 66 insertions, 54 deletions

diff --git a/net/base/dns_reload_timer.cc b/net/base/dns_reload_timer.cc
index 5931c5b..1bfe535 100644
--- a/net/base/dns_reload_timer.cc
+++ b/net/base/dns_reload_timer.cc
@@ -5,11 +5,11 @@
 #include "net/base/dns_reload_timer.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_OPENBSD)
-#include "base/singleton.h"
+#include "base/lazy_instance.h"
 #include "base/thread_local_storage.h"
 #include "base/time.h"
 
-namespace net {
+namespace {
 
 // On Linux/BSD, changes to /etc/resolv.conf can go unnoticed thus resulting
 // in DNS queries failing either because nameservers are unknown on startup
@@ -58,7 +58,7 @@ class DnsReloadTimer {
   }
 
  private:
-  friend struct DefaultSingletonTraits<DnsReloadTimer>;
+  friend struct base::DefaultLazyInstanceTraits<DnsReloadTimer>;
 
   DnsReloadTimer() {
     // During testing the DnsReloadTimer Singleton may be created and destroyed
@@ -81,8 +81,16 @@ class DnsReloadTimer {
 // static
 ThreadLocalStorage::Slot DnsReloadTimer::tls_index_(base::LINKER_INITIALIZED);
 
+base::LazyInstance<DnsReloadTimer,
+                   base::LeakyLazyInstanceTraits<DnsReloadTimer> >
+    g_dns_reload_timer(base::LINKER_INITIALIZED);
+
+}  // namespace
+
+namespace net {
+
 bool DnsReloadTimerHasExpired() {
-  DnsReloadTimer* dns_timer = Singleton<DnsReloadTimer>::get();
+  DnsReloadTimer* dns_timer = g_dns_reload_timer.Pointer();
   return dns_timer->Expired();
 }
 
diff --git a/net/base/ev_root_ca_metadata.cc b/net/base/ev_root_ca_metadata.cc
index 661b652..a721357 100644
--- a/net/base/ev_root_ca_metadata.cc
+++ b/net/base/ev_root_ca_metadata.cc
@@ -13,8 +13,8 @@
 #include <stdlib.h>
 #endif
 
+#include "base/lazy_instance.h"
 #include "base/logging.h"
-#include "base/singleton.h"
 
 namespace net {
 
@@ -283,9 +283,13 @@ const EVRootCAMetadata::PolicyOID EVRootCAMetadata::policy_oids_[] = {
 };
 #endif
 
+static base::LazyInstance<EVRootCAMetadata,
+                          base::LeakyLazyInstanceTraits<EVRootCAMetadata> >
+    g_ev_root_ca_metadata(base::LINKER_INITIALIZED);
+
 // static
 EVRootCAMetadata* EVRootCAMetadata::GetInstance() {
-  return Singleton<EVRootCAMetadata>::get();
+  return g_ev_root_ca_metadata.Pointer();
 }
 
 bool EVRootCAMetadata::GetPolicyOID(
diff --git a/net/base/ev_root_ca_metadata.h b/net/base/ev_root_ca_metadata.h
index e0961f3..832ebe2 100644
--- a/net/base/ev_root_ca_metadata.h
+++ b/net/base/ev_root_ca_metadata.h
@@ -17,8 +17,10 @@
 
 #include "net/base/x509_certificate.h"
 
+namespace base {
 template <typename T>
-struct DefaultSingletonTraits;
+struct DefaultLazyInstanceTraits;
+}  // namespace base
 
 namespace net {
 
@@ -55,7 +57,7 @@ class EVRootCAMetadata {
                       PolicyOID policy_oid) const;
 
  private:
-  friend struct DefaultSingletonTraits<EVRootCAMetadata>;
+  friend struct base::DefaultLazyInstanceTraits<EVRootCAMetadata>;
 
   typedef std::map<SHA1Fingerprint, PolicyOID,
                    SHA1FingerprintLessThan> PolicyOidMap;
diff --git a/net/base/keygen_handler_unittest.cc b/net/base/keygen_handler_unittest.cc
index 62c5191..d3bf4f5 100644
--- a/net/base/keygen_handler_unittest.cc
+++ b/net/base/keygen_handler_unittest.cc
@@ -16,6 +16,7 @@
 #include "base/logging.h"
 #include "base/nss_util.h"
 #include "base/task.h"
+#include "base/thread_restrictions.h"
 #include "base/waitable_event.h"
 #include "base/worker_pool.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -90,6 +91,9 @@ class ConcurrencyTestTask : public Task {
   }
 
   virtual void Run() {
+    // We allow Singleton use on the worker thread here since we use a
+    // WaitableEvent to synchronize, so it's safe.
+    base::ThreadRestrictions::ScopedAllowSingleton scoped_allow_singleton;
     KeygenHandler handler(768, "some challenge",
                           GURL("http://www.example.com"));
     handler.set_stores_key(false); // Don't leave the key-pair behind.
diff --git a/net/base/x509_certificate.cc b/net/base/x509_certificate.cc
index d93d270..310defb 100644
--- a/net/base/x509_certificate.cc
+++ b/net/base/x509_certificate.cc
@@ -6,9 +6,9 @@
 
 #include <map>
 
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
-#include "base/singleton.h"
 #include "base/string_piece.h"
 #include "base/time.h"
 #include "net/base/pem_tokenizer.h"
@@ -39,17 +39,6 @@ const char kCertificateHeader[] = "CERTIFICATE";
 // The PEM block header used for PKCS#7 data
 const char kPKCS7Header[] = "PKCS7";
 
-}  // namespace
-
-bool X509Certificate::LessThan::operator()(X509Certificate* lhs,
-                                           X509Certificate* rhs) const {
-  if (lhs == rhs)
-    return false;
-
-  SHA1FingerprintLessThan fingerprint_functor;
-  return fingerprint_functor(lhs->fingerprint_, rhs->fingerprint_);
-}
-
 // A thread-safe cache for X509Certificate objects.
 //
 // The cache does not hold a reference to the certificate objects.  The objects
@@ -57,9 +46,8 @@ bool X509Certificate::LessThan::operator()(X509Certificate* lhs,
 // will be holding dead pointers to the objects).
 // TODO(rsleevi): There exists a chance of a use-after-free, due to a race
 // between Find() and Remove(). See http://crbug.com/49377
-class X509Certificate::Cache {
+class X509CertificateCache {
  public:
-  static Cache* GetInstance();
   void Insert(X509Certificate* cert);
   void Remove(X509Certificate* cert);
   X509Certificate* Find(const SHA1Fingerprint& fingerprint);
@@ -68,9 +56,10 @@ class X509Certificate::Cache {
   typedef std::map<SHA1Fingerprint, X509Certificate*, SHA1FingerprintLessThan>
       CertMap;
 
-  // Obtain an instance of X509Certificate::Cache via GetInstance().
-  Cache() {}
-  friend struct DefaultSingletonTraits<Cache>;
+  // Obtain an instance of X509CertificateCache via a LazyInstance.
+  X509CertificateCache() {}
+  ~X509CertificateCache() {}
+  friend struct base::DefaultLazyInstanceTraits<X509CertificateCache>;
 
   // You must acquire this lock before using any private data of this object.
   // You must not block while holding this lock.
@@ -79,18 +68,16 @@ class X509Certificate::Cache {
   // The certificate cache.  You must acquire |lock_| before using |cache_|.
   CertMap cache_;
 
-  DISALLOW_COPY_AND_ASSIGN(Cache);
+  DISALLOW_COPY_AND_ASSIGN(X509CertificateCache);
 };
 
-// Get the singleton object for the cache.
-// static
-X509Certificate::Cache* X509Certificate::Cache::GetInstance() {
-  return Singleton<X509Certificate::Cache>::get();
-}
+base::LazyInstance<X509CertificateCache,
+                   base::LeakyLazyInstanceTraits<X509CertificateCache> >
+    g_x509_certificate_cache(base::LINKER_INITIALIZED);
 
 // Insert |cert| into the cache.  The cache does NOT AddRef |cert|.
 // Any existing certificate with the same fingerprint will be replaced.
-void X509Certificate::Cache::Insert(X509Certificate* cert) {
+void X509CertificateCache::Insert(X509Certificate* cert) {
   AutoLock lock(lock_);
 
   DCHECK(!IsNullFingerprint(cert->fingerprint())) <<
@@ -100,7 +87,7 @@ void X509Certificate::Cache::Insert(X509Certificate* cert) {
 
 // Remove |cert| from the cache.  The cache does not assume that |cert| is
 // already in the cache.
-void X509Certificate::Cache::Remove(X509Certificate* cert) {
+void X509CertificateCache::Remove(X509Certificate* cert) {
   AutoLock lock(lock_);
 
   CertMap::iterator pos(cache_.find(cert->fingerprint()));
@@ -111,7 +98,7 @@ void X509Certificate::Cache::Remove(X509Certificate* cert) {
 
 // Find a certificate in the cache with the given fingerprint.  If one does
 // not exist, this method returns NULL.
-X509Certificate* X509Certificate::Cache::Find(
+X509Certificate* X509CertificateCache::Find(
     const SHA1Fingerprint& fingerprint) {
   AutoLock lock(lock_);
 
@@ -122,6 +109,17 @@ X509Certificate* X509Certificate::Cache::Find(
   return pos->second;
 };
 
+}  // namespace
+
+bool X509Certificate::LessThan::operator()(X509Certificate* lhs,
+                                           X509Certificate* rhs) const {
+  if (lhs == rhs)
+    return false;
+
+  SHA1FingerprintLessThan fingerprint_functor;
+  return fingerprint_functor(lhs->fingerprint_, rhs->fingerprint_);
+}
+
 // static
 X509Certificate* X509Certificate::CreateFromHandle(
     OSCertHandle cert_handle,
@@ -131,7 +129,7 @@ X509Certificate* X509Certificate::CreateFromHandle(
   DCHECK(source != SOURCE_UNUSED);
 
   // Check if we already have this certificate in memory.
-  X509Certificate::Cache* cache = X509Certificate::Cache::GetInstance();
+  X509CertificateCache* cache = g_x509_certificate_cache.Pointer();
   X509Certificate* cached_cert =
       cache->Find(CalculateFingerprint(cert_handle));
   if (cached_cert) {
@@ -311,7 +309,7 @@ X509Certificate::X509Certificate(const std::string& subject,
 
 X509Certificate::~X509Certificate() {
   // We might not be in the cache, but it is safe to remove ourselves anyway.
-  X509Certificate::Cache::GetInstance()->Remove(this);
+  g_x509_certificate_cache.Get().Remove(this);
   if (cert_handle_)
     FreeOSCertHandle(cert_handle_);
   for (size_t i = 0; i < intermediate_ca_certs_.size(); ++i)
diff --git a/net/base/x509_certificate.h b/net/base/x509_certificate.h
index 1866a17..9f44952 100644
--- a/net/base/x509_certificate.h
+++ b/net/base/x509_certificate.h
@@ -284,8 +284,6 @@ class X509Certificate : public base::RefCountedThreadSafe<X509Certificate> {
   FRIEND_TEST_ALL_PREFIXES(X509CertificateTest, Cache);
   FRIEND_TEST_ALL_PREFIXES(X509CertificateTest, IntermediateCertificates);
 
-  class Cache;
-
   // Construct an X509Certificate from a handle to the certificate object
   // in the underlying crypto library.
   X509Certificate(OSCertHandle cert_handle, Source source,
diff --git a/net/base/x509_certificate_mac.cc b/net/base/x509_certificate_mac.cc
index a2a0eea..2a604ee 100644
--- a/net/base/x509_certificate_mac.cc
+++ b/net/base/x509_certificate_mac.cc
@@ -8,6 +8,7 @@
 #include <Security/Security.h>
 #include <time.h>
 
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/pickle.h"
 #include "base/mac/scoped_cftyperef.h"
@@ -21,6 +22,8 @@ using base::Time;
 
 namespace net {
 
+namespace {
+
 class MacTrustedCertificates {
  public:
   // Sets the trusted root certificate used by tests. Call with |cert| set
@@ -57,7 +60,7 @@ class MacTrustedCertificates {
     return merged_array;
   }
  private:
-  friend struct DefaultSingletonTraits<MacTrustedCertificates>;
+  friend struct base::DefaultLazyInstanceTraits<MacTrustedCertificates>;
 
   // Obtain an instance of MacTrustedCertificates via the singleton
   // interface.
@@ -73,11 +76,9 @@ class MacTrustedCertificates {
   DISALLOW_COPY_AND_ASSIGN(MacTrustedCertificates);
 };
 
-void SetMacTestCertificate(X509Certificate* cert) {
-  Singleton<MacTrustedCertificates>::get()->SetTestCertificate(cert);
-}
-
-namespace {
+base::LazyInstance<MacTrustedCertificates,
+    base::LeakyLazyInstanceTraits<MacTrustedCertificates> >
+    g_mac_trusted_certificates(base::LINKER_INITIALIZED);
 
 typedef OSStatus (*SecTrustCopyExtendedResultFuncPtr)(SecTrustRef,
                                                       CFDictionaryRef*);
@@ -443,6 +444,10 @@ void AddCertificatesFromBytes(const char* data, size_t length,
 
 }  // namespace
 
+void SetMacTestCertificate(X509Certificate* cert) {
+  g_mac_trusted_certificates.Get().SetTestCertificate(cert);
+}
+
 void X509Certificate::Initialize() {
   const CSSM_X509_NAME* name;
   OSStatus status = SecCertificateGetSubject(cert_handle_, &name);
@@ -545,7 +550,7 @@ int X509Certificate::Verify(const std::string& hostname, int flags,
   // Set the trusted anchor certificates for the SecTrustRef by merging the
   // system trust anchors and the test root certificate.
   CFArrayRef anchor_array =
-      Singleton<MacTrustedCertificates>::get()->CopyTrustedCertificateArray();
+      g_mac_trusted_certificates.Get().CopyTrustedCertificateArray();
   ScopedCFTypeRef<CFArrayRef> scoped_anchor_array(anchor_array);
   if (anchor_array) {
     status = SecTrustSetAnchorCertificates(trust_ref, anchor_array);
diff --git a/net/ocsp/nss_ocsp.cc b/net/ocsp/nss_ocsp.cc
index fafaa68..7618f9e 100644
--- a/net/ocsp/nss_ocsp.cc
+++ b/net/ocsp/nss_ocsp.cc
@@ -85,7 +85,8 @@ class OCSPIOLoop {
   DISALLOW_COPY_AND_ASSIGN(OCSPIOLoop);
 };
 
-base::LazyInstance<OCSPIOLoop> g_ocsp_io_loop(base::LINKER_INITIALIZED);
+base::LazyInstance<OCSPIOLoop, base::LeakyLazyInstanceTraits<OCSPIOLoop> >
+    g_ocsp_io_loop(base::LINKER_INITIALIZED);
 
 const int kRecvBufferSize = 4096;
 
@@ -560,7 +561,6 @@ OCSPNSSInitialization::~OCSPNSSInitialization() {}
 SECStatus OCSPCreateSession(const char* host, PRUint16 portnum,
                             SEC_HTTP_SERVER_SESSION* pSession) {
   VLOG(1) << "OCSP create session: host=" << host << " port=" << portnum;
-  DCHECK(!MessageLoop::current());
   pthread_mutex_lock(&g_request_context_lock);
   URLRequestContext* request_context = g_request_context;
   pthread_mutex_unlock(&g_request_context_lock);
@@ -579,7 +579,6 @@ SECStatus OCSPCreateSession(const char* host, PRUint16 portnum,
 SECStatus OCSPKeepAliveSession(SEC_HTTP_SERVER_SESSION session,
                                PRPollDesc **pPollDesc) {
   VLOG(1) << "OCSP keep alive";
-  DCHECK(!MessageLoop::current());
   if (pPollDesc)
     *pPollDesc = NULL;
   return SECSuccess;
@@ -587,7 +586,6 @@ SECStatus OCSPKeepAliveSession(SEC_HTTP_SERVER_SESSION session,
 
 SECStatus OCSPFreeSession(SEC_HTTP_SERVER_SESSION session) {
   VLOG(1) << "OCSP free session";
-  DCHECK(!MessageLoop::current());
   delete reinterpret_cast<OCSPServerSession*>(session);
   return SECSuccess;
 }
@@ -602,7 +600,6 @@ SECStatus OCSPCreate(SEC_HTTP_SERVER_SESSION session,
           << " path_and_query=" << path_and_query_string
           << " http_request_method=" << http_request_method
           << " timeout=" << timeout;
-  DCHECK(!MessageLoop::current());
   OCSPServerSession* ocsp_session =
       reinterpret_cast<OCSPServerSession*>(session);
 
@@ -624,7 +621,6 @@ SECStatus OCSPSetPostData(SEC_HTTP_REQUEST_SESSION request,
                           const PRUint32 http_data_len,
                           const char* http_content_type) {
   VLOG(1) << "OCSP set post data len=" << http_data_len;
-  DCHECK(!MessageLoop::current());
   OCSPRequestSession* req = reinterpret_cast<OCSPRequestSession*>(request);
 
   req->SetPostData(http_data, http_data_len, http_content_type);
@@ -636,7 +632,6 @@ SECStatus OCSPAddHeader(SEC_HTTP_REQUEST_SESSION request,
                         const char* http_header_value) {
   VLOG(1) << "OCSP add header name=" << http_header_name
           << " value=" << http_header_value;
-  DCHECK(!MessageLoop::current());
   OCSPRequestSession* req = reinterpret_cast<OCSPRequestSession*>(request);
 
   req->AddHeader(http_header_name, http_header_value);
@@ -696,7 +691,6 @@ SECStatus OCSPTrySendAndReceive(SEC_HTTP_REQUEST_SESSION request,
   }
 
   VLOG(1) << "OCSP try send and receive";
-  DCHECK(!MessageLoop::current());
   OCSPRequestSession* req = reinterpret_cast<OCSPRequestSession*>(request);
   // We support blocking mode only.
   if (pPollDesc)
@@ -774,7 +768,6 @@ SECStatus OCSPTrySendAndReceive(SEC_HTTP_REQUEST_SESSION request,
 
 SECStatus OCSPFree(SEC_HTTP_REQUEST_SESSION request) {
   VLOG(1) << "OCSP free";
-  DCHECK(!MessageLoop::current());
   OCSPRequestSession* req = reinterpret_cast<OCSPRequestSession*>(request);
   req->Cancel();
   req->Release();