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diff --git a/third_party/sqlite/os_common.h b/third_party/sqlite/os_common.h
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+/*
+** 2004 May 22
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+******************************************************************************
+**
+** This file contains macros and a little bit of code that is common to
+** all of the platform-specific files (os_*.c) and is #included into those
+** files.
+**
+** This file should be #included by the os_*.c files only.  It is not a
+** general purpose header file.
+*/
+
+/*
+** At least two bugs have slipped in because we changed the MEMORY_DEBUG
+** macro to SQLITE_DEBUG and some older makefiles have not yet made the
+** switch.  The following code should catch this problem at compile-time.
+*/
+#ifdef MEMORY_DEBUG
+# error "The MEMORY_DEBUG macro is obsolete.  Use SQLITE_DEBUG instead."
+#endif
+
+
+/*
+ * When testing, this global variable stores the location of the
+ * pending-byte in the database file.
+ */
+#ifdef SQLITE_TEST
+unsigned int sqlite3_pending_byte = 0x40000000;
+#endif
+
+#ifdef SQLITE_DEBUG
+int sqlite3_os_trace = 0;
+#define OSTRACE1(X)         if( sqlite3_os_trace ) sqlite3DebugPrintf(X)
+#define OSTRACE2(X,Y)       if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y)
+#define OSTRACE3(X,Y,Z)     if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z)
+#define OSTRACE4(X,Y,Z,A)   if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z,A)
+#define OSTRACE5(X,Y,Z,A,B) if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z,A,B)
+#define OSTRACE6(X,Y,Z,A,B,C) \
+    if(sqlite3_os_trace) sqlite3DebugPrintf(X,Y,Z,A,B,C)
+#define OSTRACE7(X,Y,Z,A,B,C,D) \
+    if(sqlite3_os_trace) sqlite3DebugPrintf(X,Y,Z,A,B,C,D)
+#else
+#define OSTRACE1(X)
+#define OSTRACE2(X,Y)
+#define OSTRACE3(X,Y,Z)
+#define OSTRACE4(X,Y,Z,A)
+#define OSTRACE5(X,Y,Z,A,B)
+#define OSTRACE6(X,Y,Z,A,B,C)
+#define OSTRACE7(X,Y,Z,A,B,C,D)
+#endif
+
+/*
+** Macros for performance tracing.  Normally turned off.  Only works
+** on i486 hardware.
+*/
+#ifdef SQLITE_PERFORMANCE_TRACE
+__inline__ unsigned long long int hwtime(void){
+  unsigned long long int x;
+  __asm__("rdtsc\n\t"
+          "mov %%edx, %%ecx\n\t"
+          :"=A" (x));
+  return x;
+}
+static unsigned long long int g_start;
+static unsigned int elapse;
+#define TIMER_START       g_start=hwtime()
+#define TIMER_END         elapse=hwtime()-g_start
+#define TIMER_ELAPSED     elapse
+#else
+#define TIMER_START
+#define TIMER_END
+#define TIMER_ELAPSED     0
+#endif
+
+/*
+** If we compile with the SQLITE_TEST macro set, then the following block
+** of code will give us the ability to simulate a disk I/O error.  This
+** is used for testing the I/O recovery logic.
+*/
+#ifdef SQLITE_TEST
+int sqlite3_io_error_hit = 0;
+int sqlite3_io_error_pending = 0;
+int sqlite3_io_error_persist = 0;
+int sqlite3_diskfull_pending = 0;
+int sqlite3_diskfull = 0;
+#define SimulateIOError(CODE)  \
+  if( sqlite3_io_error_pending || sqlite3_io_error_hit ) \
+     if( sqlite3_io_error_pending-- == 1 \
+         || (sqlite3_io_error_persist && sqlite3_io_error_hit) ) \
+                { local_ioerr(); CODE; }
+static void local_ioerr(){
+  IOTRACE(("IOERR\n"));
+  sqlite3_io_error_hit = 1;
+}
+#define SimulateDiskfullError(CODE) \
+   if( sqlite3_diskfull_pending ){ \
+     if( sqlite3_diskfull_pending == 1 ){ \
+       local_ioerr(); \
+       sqlite3_diskfull = 1; \
+       sqlite3_io_error_hit = 1; \
+       CODE; \
+     }else{ \
+       sqlite3_diskfull_pending--; \
+     } \
+   }
+#else
+#define SimulateIOError(A)
+#define SimulateDiskfullError(A)
+#endif
+
+/*
+** When testing, keep a count of the number of open files.
+*/
+#ifdef SQLITE_TEST
+int sqlite3_open_file_count = 0;
+#define OpenCounter(X)  sqlite3_open_file_count+=(X)
+#else
+#define OpenCounter(X)
+#endif
+
+/*
+** sqlite3GenericMalloc
+** sqlite3GenericRealloc
+** sqlite3GenericOsFree
+** sqlite3GenericAllocationSize
+**
+** Implementation of the os level dynamic memory allocation interface in terms
+** of the standard malloc(), realloc() and free() found in many operating
+** systems. No rocket science here.
+**
+** There are two versions of these four functions here. The version
+** implemented here is only used if memory-management or memory-debugging is
+** enabled. This version allocates an extra 8-bytes at the beginning of each
+** block and stores the size of the allocation there.
+**
+** If neither memory-management or debugging is enabled, the second
+** set of implementations is used instead.
+*/
+#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || defined (SQLITE_MEMDEBUG)
+void *sqlite3GenericMalloc(int n){
+  char *p = (char *)malloc(n+8);
+  assert(n>0);
+  assert(sizeof(int)<=8);
+  if( p ){
+    *(int *)p = n;
+    p += 8;
+  }
+  return (void *)p;
+}
+void *sqlite3GenericRealloc(void *p, int n){
+  char *p2 = ((char *)p - 8);
+  assert(n>0);
+  p2 = (char*)realloc(p2, n+8);
+  if( p2 ){
+    *(int *)p2 = n;
+    p2 += 8;
+  }
+  return (void *)p2;
+}
+void sqlite3GenericFree(void *p){
+  assert(p);
+  free((void *)((char *)p - 8));
+}
+int sqlite3GenericAllocationSize(void *p){
+  return p ? *(int *)((char *)p - 8) : 0;
+}
+#else
+void *sqlite3GenericMalloc(int n){
+  char *p = (char *)malloc(n);
+  return (void *)p;
+}
+void *sqlite3GenericRealloc(void *p, int n){
+  assert(n>0);
+  p = realloc(p, n);
+  return p;
+}
+void sqlite3GenericFree(void *p){
+  assert(p);
+  free(p);
+}
+/* Never actually used, but needed for the linker */
+int sqlite3GenericAllocationSize(void *p){ return 0; }
+#endif
+
+/*
+** The default size of a disk sector
+*/
+#ifndef PAGER_SECTOR_SIZE
+# define PAGER_SECTOR_SIZE 512
+#endif