SQLite: logging to track down SQLITE_IOERR_WRITE on waterfall.

Will remove once it is determined what is happening, or if the fail
still happens but this logging doesn't fire.

BUG=56427
TEST=none

Review URL: http://codereview.chromium.org/3473026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60938 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 2 deletions

diff --git a/third_party/sqlite/src/src/os_unix.c b/third_party/sqlite/src/src/os_unix.c
index ef04a72..5bc6955 100644
--- a/third_party/sqlite/src/src/os_unix.c
+++ b/third_party/sqlite/src/src/os_unix.c
@@ -2829,8 +2829,15 @@ static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
 #else
   newOffset = lseek(id->h, offset, SEEK_SET);
   if( newOffset!=offset ){
+    int capturedErrno = errno;  /* Capture errno before fprintf(). */
+    /* TODO(shess): Tracking a SQLITE_IOERR_WRITE being seen on the
+     * waterfall.  http://crbug.com/56427 */
+    fprintf(stderr, "SQLite lseek error in seekAndWrite, "
+            "offset == %d, rc == %d, errno == %d\n",
+            (int)offset, (int)newOffset, capturedErrno);
+    fflush(stderr);
     if( newOffset == -1 ){
-      ((unixFile*)id)->lastErrno = errno;
+      ((unixFile*)id)->lastErrno = capturedErrno;
     }else{
       ((unixFile*)id)->lastErrno = 0;			
     }
@@ -2840,7 +2847,14 @@ static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
 #endif
   TIMER_END;
   if( got<0 ){
-    ((unixFile*)id)->lastErrno = errno;
+    int capturedErrno = errno;  /* Capture errno before fprintf(). */
+    /* TODO(shess): Tracking a SQLITE_IOERR_WRITE being seen on the
+     * waterfall.  http://crbug.com/56427 */
+    fprintf(stderr, "SQLite write error in seekAndWrite, "
+            "cnt == %d, rc == %d, errno == %d\n",
+            cnt, got, capturedErrno);
+    fflush(stderr);
+    ((unixFile*)id)->lastErrno = capturedErrno;
   }
 
   OSTRACE5("WRITE   %-3d %5d %7lld %llu\n", id->h, got, offset, TIMER_ELAPSED);