--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/malloc4.test Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,194 @@
+# 2005 November 30
+#
+# 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 tests to ensure that the library handles malloc() failures
+# correctly. The emphasis in this file is on sqlite3_column_XXX() APIs.
+#
+# $Id: malloc4.test,v 1.10 2008/02/18 22:24:58 drh Exp $
+
+#---------------------------------------------------------------------------
+# NOTES ON EXPECTED BEHAVIOUR
+#
+# [193] When a memory allocation failure occurs during sqlite3_column_name(),
+# sqlite3_column_name16(), sqlite3_column_decltype(), or
+# sqlite3_column_decltype16() the function shall return NULL.
+#
+#---------------------------------------------------------------------------
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+source $testdir/malloc_common.tcl
+
+# Only run these tests if memory debugging is turned on.
+if {!$MEMDEBUG} {
+ puts "Skipping malloc4 tests: not compiled with -DSQLITE_MEMDEBUG..."
+ finish_test
+ return
+}
+
+ifcapable !utf16 {
+ finish_test
+ return
+}
+
+proc do_stmt_test {id sql} {
+ set ::sql $sql
+ set go 1
+ for {set n 0} {$go} {incr n} {
+ set testid "malloc4-$id.$n"
+
+ # Prepare the statement
+ do_test ${testid}.1 {
+ set ::STMT [sqlite3_prepare $::DB $sql -1 TAIL]
+ expr [string length $::STMT] > 0
+ } {1}
+
+ # Set the Nth malloc() to fail.
+ sqlite3_memdebug_fail $n -repeat 0
+
+ # Test malloc failure in the _name(), _name16(), decltype() and
+ # decltype16() APIs. Calls that occur after the malloc() failure should
+ # return NULL. No error is raised though.
+ #
+ # ${testid}.2.1 - Call _name()
+ # ${testid}.2.2 - Call _name16()
+ # ${testid}.2.3 - Call _name()
+ # ${testid}.2.4 - Check that the return values of the above three calls are
+ # consistent with each other and with the simulated
+ # malloc() failures.
+ #
+ # Because the code that implements the _decltype() and _decltype16() APIs
+ # is the same as the _name() and _name16() implementations, we don't worry
+ # about explicitly testing them.
+ #
+ do_test ${testid}.2.1 {
+ set mf1 [expr [sqlite3_memdebug_pending] < 0]
+ set ::name8 [sqlite3_column_name $::STMT 0]
+ set mf2 [expr [sqlite3_memdebug_pending] < 0]
+ expr {$mf1 == $mf2 || $::name8 == ""}
+ } {1}
+ do_test ${testid}.2.2 {
+ set mf1 [expr [sqlite3_memdebug_pending] < 0]
+ set ::name16 [sqlite3_column_name16 $::STMT 0]
+ set ::name16 [encoding convertfrom unicode $::name16]
+ set ::name16 [string range $::name16 0 end-1]
+ set mf2 [expr [sqlite3_memdebug_pending] < 0]
+ expr {$mf1 == $mf2 || $::name16 == ""}
+ } {1}
+ do_test ${testid}.2.3 {
+ set mf1 [expr [sqlite3_memdebug_pending] < 0]
+ set ::name8_2 [sqlite3_column_name $::STMT 0]
+ set mf2 [expr [sqlite3_memdebug_pending] < 0]
+ expr {$mf1 == $mf2 || $::name8_2 == ""}
+ } {1}
+ set ::mallocFailed [expr [sqlite3_memdebug_pending] < 0]
+ do_test ${testid}.2.4 {
+ expr {
+ $::name8 == $::name8_2 && $::name16 == $::name8 && !$::mallocFailed ||
+ $::name8 == $::name8_2 && $::name16 == "" && $::mallocFailed ||
+ $::name8 == $::name16 && $::name8_2 == "" && $::mallocFailed ||
+ $::name8_2 == $::name16 && $::name8 == "" && $::mallocFailed
+ }
+ } {1}
+
+ # Step the statement so that we can call _text() and _text16(). Before
+ # running sqlite3_step(), make sure that malloc() is not about to fail.
+ # Memory allocation failures that occur within sqlite3_step() are tested
+ # elsewhere.
+ set mf [sqlite3_memdebug_pending]
+ sqlite3_memdebug_fail -1
+ do_test ${testid}.3 {
+ sqlite3_step $::STMT
+ } {SQLITE_ROW}
+ sqlite3_memdebug_fail $mf
+
+ # Test for malloc() failures within _text() and _text16().
+ #
+ do_test ${testid}.4.1 {
+ set ::text8 [sqlite3_column_text $::STMT 0]
+ set mf [expr [sqlite3_memdebug_pending] < 0 && !$::mallocFailed]
+ expr {$mf==0 || $::text8 == ""}
+ } {1}
+ do_test ${testid}.4.2 {
+ set ::text16 [sqlite3_column_text16 $::STMT 0]
+ set ::text16 [encoding convertfrom unicode $::text16]
+ set ::text16 [string range $::text16 0 end-1]
+ set mf [expr [sqlite3_memdebug_pending] < 0 && !$::mallocFailed]
+ expr {$mf==0 || $::text16 == ""}
+ } {1}
+ do_test ${testid}.4.3 {
+ set ::text8_2 [sqlite3_column_text $::STMT 0]
+ set mf [expr [sqlite3_memdebug_pending] < 0 && !$::mallocFailed]
+ expr {$mf==0 || $::text8_2 == "" || ($::text16 == "" && $::text8 != "")}
+ } {1}
+
+ # Test for malloc() failures within _int(), _int64() and _real(). The only
+ # way this can occur is if the string has to be translated from UTF-16 to
+ # UTF-8 before being converted to a numeric value.
+ do_test ${testid}.4.4.1 {
+ set mf [sqlite3_memdebug_pending]
+ sqlite3_memdebug_fail -1
+ sqlite3_column_text16 $::STMT 0
+ sqlite3_memdebug_fail $mf
+ sqlite3_column_int $::STMT 0
+ } {0}
+ do_test ${testid}.4.5 {
+ set mf [sqlite3_memdebug_pending]
+ sqlite3_memdebug_fail -1
+ sqlite3_column_text16 $::STMT 0
+ sqlite3_memdebug_fail $mf
+ sqlite3_column_int64 $::STMT 0
+ } {0}
+
+ do_test ${testid}.4.6 {
+ set mf [sqlite3_memdebug_pending]
+ sqlite3_memdebug_fail -1
+ sqlite3_column_text16 $::STMT 0
+ sqlite3_memdebug_fail $mf
+ sqlite3_column_double $::STMT 0
+ } {0.0}
+
+ set mallocFailedAfterStep [expr \
+ [sqlite3_memdebug_pending] < 0 && !$::mallocFailed
+ ]
+
+ sqlite3_memdebug_fail -1
+ # Test that if a malloc() failed the next call to sqlite3_step() returns
+ # SQLITE_ERROR. If malloc() did not fail, it should return SQLITE_DONE.
+ #
+ do_test ${testid}.5 {
+ sqlite3_step $::STMT
+ } [expr {$mallocFailedAfterStep ? "SQLITE_ERROR" : "SQLITE_DONE"}]
+
+ do_test ${testid}.6 {
+ sqlite3_finalize $::STMT
+ } [expr {$mallocFailedAfterStep ? "SQLITE_NOMEM" : "SQLITE_OK"}]
+
+ if {$::mallocFailed == 0 && $mallocFailedAfterStep == 0} {
+ sqlite3_memdebug_fail -1
+ set go 0
+ }
+ }
+}
+
+execsql {
+ CREATE TABLE tbl(
+ the_first_reasonably_long_column_name that_also_has_quite_a_lengthy_type
+ );
+ INSERT INTO tbl VALUES(
+ 'An extra long string. Far too long to be stored in NBFS bytes.'
+ );
+}
+
+do_stmt_test 1 "SELECT * FROM tbl"
+
+sqlite3_memdebug_fail -1
+finish_test