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Fix for BUG#14703 "Valgrind error when inserting 0 into a BIT column (like in type_bit.test)":

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test "length" first (otherwise when "length" is 0, the *from invalid access still triggers a Valgrind warning).
I wrote to the Valgrind authors in case this is something fixable in Valgrind (normally the
decision to issue a warning is based on the simulated CPU condition code, which should not be undefined here).
This commit is contained in:
guilhem@mysql.com
2005-11-07 16:18:46 +01:00
parent 517e51f1ed
commit ef415ceb14
3 changed files with 6 additions and 4 deletions
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4
BUILD/compile-pentium64-valgrind-max
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@@ -3,13 +3,13 @@
path=`dirname $0`
. "$path/SETUP.sh"
extra_flags="$pentium64_cflags $debug_cflags -USAFEMALLOC -UFORCE_INIT_OF_VARS -DHAVE_purify -DMYSQL_SERVER_SUFFIX=-valgrind-max"
extra_flags="$pentium64_cflags $debug_cflags $max_cflags -USAFEMALLOC -UFORCE_INIT_OF_VARS -DHAVE_purify -DMYSQL_SERVER_SUFFIX=-valgrind-max"
c_warnings="$c_warnings $debug_extra_warnings"
cxx_warnings="$cxx_warnings $debug_extra_warnings"
extra_configs="$pentium_configs $debug_configs"
# We want to test isam when building with valgrind
extra_configs="$extra_configs --with-berkeley-db --with-innodb --with-isam --with-embedded-server --with-openssl --with-raid --with-ndbcluster"
extra_configs="$extra_configs $max_leave_isam_configs --with-isam"
. "$path/FINISH.sh"

2
mysql-test/r/read_only.result
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@@ -14,6 +14,8 @@ create table t3 (a int);
ERROR HY000: The MySQL server is running with the --read-only option so it cannot execute this statement
insert into t1 values(1);
ERROR HY000: The MySQL server is running with the --read-only option so it cannot execute this statement
update t1 set a=1 where 1=0;
ERROR HY000: The MySQL server is running with the --read-only option so it cannot execute this statement
update t1,t2 set t1.a=t2.a+1 where t1.a=t2.a;
ERROR HY000: The MySQL server is running with the --read-only option so it cannot execute this statement
delete t1,t2 from t1,t2 where t1.a=t2.a;

4
sql/field.cc
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@@ -7931,7 +7931,7 @@ int Field_bit::store(const char *from, uint length, CHARSET_INFO *cs)
{
int delta;
for (; !*from && length; from++, length--); // skip left 0's
for (; length && !*from; from++, length--); // skip left 0's
delta= field_length - length;
if (delta < -1 ||
@@ -8151,7 +8151,7 @@ int Field_bit_as_char::store(const char *from, uint length, CHARSET_INFO *cs)
int delta;
uchar bits= create_length & 7;
for (; !*from && length; from++, length--); // skip left 0's
for (; length && !*from; from++, length--); // skip left 0's
delta= field_length - length;
if (delta < 0 ||