Add some tests for malloc() failure within the column_name() and column_decl() APIs. (CVS 2805)
FossilOrigin-Name: 78f10ca0a6a02e9e8e6811489841a19e213f3afb
diff --git a/test/malloc4.test b/test/malloc4.test
new file mode 100644
index 0000000..eee0afc
--- /dev/null
+++ b/test/malloc4.test
@@ -0,0 +1,114 @@
+# 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 1.1 2005/12/07 06:27:45 danielk1977 Exp $
+
+#---------------------------------------------------------------------------
+# NOTES ON EXPECTED BEHAVIOUR
+#
+#---------------------------------------------------------------------------
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Only run these tests if memory debugging is turned on.
+if {[info command sqlite_malloc_stat]==""} {
+ puts "Skipping malloc tests: not compiled with -DSQLITE_MEMDEBUG..."
+ finish_test
+ return
+}
+
+
+proc do_stmt_test {id sql} {
+ set ::sql $sql
+ set go 1
+ for {set n 1} {$go} {incr n} {
+ set testid "malloc4-$id.(iFail $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.
+ sqlite_malloc_fail $n
+
+ # 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.
+ do_test ${testid}.2.1 {
+ set mf1 [expr [lindex [sqlite_malloc_stat] 2] <= 0]
+ set ::name8 [sqlite3_column_name $::STMT 0]
+ set mf2 [expr [lindex [sqlite_malloc_stat] 2] <= 0]
+ expr {$mf1 == $mf2 || $::name8 == ""}
+ } {1}
+ do_test ${testid}.2.2 {
+ set mf1 [expr [lindex [sqlite_malloc_stat] 2] <= 0]
+ set ::name16 [sqlite3_column_name16 $::STMT 0]
+ set ::name16 [encoding convertfrom unicode $::name16]
+ set ::name16 [string range $::name16 0 end-1]
+ set mf2 [expr [lindex [sqlite_malloc_stat] 2] <= 0]
+ expr {$mf1 == $mf2 || $::name16 == ""}
+ } {1}
+ do_test ${testid}.2.3 {
+ set mf1 [expr [lindex [sqlite_malloc_stat] 2] <= 0]
+ set ::name8_2 [sqlite3_column_name $::STMT 0]
+ set mf2 [expr [lindex [sqlite_malloc_stat] 2] <= 0]
+ expr {$mf1 == $mf2 || $::name8_2 == ""}
+ } {1}
+ set ::mallocFailed [expr [lindex [sqlite_malloc_stat] 2] <= 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 == "" && $::mallocFailed
+ }
+ } {1}
+
+ if {$::mallocFailed == 0} {
+ sqlite_malloc_fail 0
+ set go 0
+ }
+
+if 0 {
+ # Test that if a malloc() failed the next call to sqlite3_step() returns
+ # SQLITE_ERROR. If malloc() did not fail, it should return SQLITE_ROW.
+ #
+ # Before running sqlite3_step(), make sure that malloc() is not about to
+ # fail. Memory allocation failures that occur within sqlite3_step() are
+ # tested elsewhere.
+ do_test ${testid}.3 {
+ set rc [sqlite3_step $::STMT]
+ list [expr $rc=="SQLITE_ERROR"] [expr $rc=="SQLITE_ROW"]
+ } [list $mallocFailed [expr !$mallocFailed]]
+}
+
+ do_test ${testid}.4 {
+ sqlite3_finalize $::STMT
+ } {SQLITE_OK}
+ }
+}
+
+execsql {
+ CREATE TABLE tbl(
+ the_first_reasonably_long_column_name that_also_has_quite_a_lengthy_type
+ );
+}
+do_stmt_test 1 "SELECT * FROM tbl"
+
+sqlite_malloc_fail 0
+finish_test
+