Track down errno for SQLITE_IOERR_WRITE is happening.

Adds a log line to try to track down an SQLite error happening on the
waterfall.  Should only be emitted in case of a bad thing happening,
like file-descriptors closing out from under us, so I can't think of
why this would ever be hit for real.

BUG=56427
TEST=no effect

Attempt to test extended error codes.  Fail.

Review URL: http://codereview.chromium.org/3433016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60125 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 18 insertions, 2 deletions

diff --git a/app/sql/connection.cc b/app/sql/connection.cc
index 0b9021f..d227468 100644
--- a/app/sql/connection.cc
+++ b/app/sql/connection.cc
@@ -258,6 +258,17 @@ int Connection::GetErrorCode() const {
   return sqlite3_errcode(db_);
 }
 
+int Connection::GetLastErrno() const {
+  if (!db_)
+    return -1;
+
+  int err = 0;
+  if (SQLITE_OK != sqlite3_file_control(db_, NULL, SQLITE_LAST_ERRNO, &err))
+    return -2;
+
+  return err;
+}
+
 const char* Connection::GetErrorMessage() const {
   if (!db_)
     return "sql::Connection has no connection.";
diff --git a/app/sql/connection.h b/app/sql/connection.h
index b89fb1a..0bd28ca 100644
--- a/app/sql/connection.h
+++ b/app/sql/connection.h
@@ -261,6 +261,10 @@ class Connection {
   // Returns the error code associated with the last sqlite operation.
   int GetErrorCode() const;
 
+  // Returns the errno associated with GetErrorCode().  See
+  // SQLITE_LAST_ERRNO in SQLite documentation.
+  int GetLastErrno() const;
+
   // Returns a pointer to a statically allocated string associated with the
   // last sqlite operation.
   const char* GetErrorMessage() const;
diff --git a/app/sql/diagnostic_error_delegate.h b/app/sql/diagnostic_error_delegate.h
index c9de8ee..1c2d6e9 100644
--- a/app/sql/diagnostic_error_delegate.h
+++ b/app/sql/diagnostic_error_delegate.h
@@ -27,8 +27,9 @@ class DiagnosticErrorDelegate : public ErrorDelegate {
 
   virtual int OnError(int error, Connection* connection,
                       Statement* stmt) {
-    NOTREACHED() << "sqlite error " << error << ": " <<
-        connection->GetErrorMessage();
+    NOTREACHED() << "sqlite error " << error
+                 << ", errno " << connection->GetLastErrno()
+                 << ": " << connection->GetErrorMessage();
     RecordErrorInHistogram(error);
     return error;
   }