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mpenick/mem_leak_prepared.c

Created January 25, 2017 01:20
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CPP-363 - Reproduce memory leaks in schema metadata
Raw
mem_leak_prepared.c
/*
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
For more information, please refer to <http://unlicense.org/>
*/
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "cassandra.h"
struct Basic_ {
cass_bool_t bln;
cass_float_t flt;
cass_double_t dbl;
cass_int32_t i32;
cass_int64_t i64;
};
typedef struct Basic_ Basic;
void print_error(CassFuture* future) {
const char* message;
size_t message_length;
cass_future_error_message(future, &message, &message_length);
fprintf(stderr, "Error: %.*s\n", (int)message_length, message);
}
CassCluster* create_cluster() {
CassCluster* cluster = cass_cluster_new();
cass_cluster_set_contact_points(cluster, "192.168.56.1");
return cluster;
}
CassError connect_session(CassSession* session, const CassCluster* cluster) {
CassError rc = CASS_OK;
CassFuture* future = cass_session_connect(session, cluster);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
}
cass_future_free(future);
return rc;
}
CassError execute_query(CassSession* session, const char* query) {
CassError rc = CASS_OK;
CassStatement* statement = cass_statement_new(query, 0);
CassFuture* future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
CassError insert_into_basic(CassSession* session, const char* key, const Basic* basic) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
const char* query = "INSERT INTO examples.basic (key, bln, flt, dbl, i32, i64) VALUES (?, ?, ?, ?, ?, ?);";
statement = cass_statement_new(query, 6);
cass_statement_bind_string(statement, 0, key);
cass_statement_bind_bool(statement, 1, basic->bln);
cass_statement_bind_float(statement, 2, basic->flt);
cass_statement_bind_double(statement, 3, basic->dbl);
cass_statement_bind_int32(statement, 4, basic->i32);
cass_statement_bind_int64(statement, 5, basic->i64);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
CassError prepare_select_from_basic(CassSession* session, const CassPrepared** prepared) {
CassError rc = CASS_OK;
CassFuture* future = NULL;
const char* query = "SELECT * FROM examples.basic WHERE key = ?";
future = cass_session_prepare(session, query);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
*prepared = cass_future_get_prepared(future);
}
/*
* By not deleting the future for the prepare
* we leave a reference to schema metadata.
*/
/* cass_future_free(future); */
return rc;
}
CassError select_from_basic(CassSession* session, const CassPrepared * prepared, const char* key, Basic* basic) {
CassError rc = CASS_OK;
CassStatement* statement = NULL;
CassFuture* future = NULL;
statement = cass_prepared_bind(prepared);
cass_statement_bind_string(statement, 0, key);
future = cass_session_execute(session, statement);
cass_future_wait(future);
rc = cass_future_error_code(future);
if (rc != CASS_OK) {
print_error(future);
} else {
const CassResult* result = cass_future_get_result(future);
CassIterator* iterator = cass_iterator_from_result(result);
if (cass_iterator_next(iterator)) {
const CassRow* row = cass_iterator_get_row(iterator);
cass_value_get_bool(cass_row_get_column(row, 1), &basic->bln);
cass_value_get_double(cass_row_get_column(row, 2), &basic->dbl);
cass_value_get_float(cass_row_get_column(row, 3), &basic->flt);
cass_value_get_int32(cass_row_get_column(row, 4), &basic->i32);
cass_value_get_int64(cass_row_get_column(row, 5), &basic->i64);
}
cass_result_free(result);
cass_iterator_free(iterator);
}
cass_future_free(future);
cass_statement_free(statement);
return rc;
}
int main() {
CassCluster* cluster = create_cluster();
CassSession* session = cass_session_new();
CassFuture* close_future = NULL;
Basic input = { cass_true, 0.001f, 0.0002, 1, 2 };
Basic output;
const CassPrepared* prepared = NULL;
if (connect_session(session, cluster) != CASS_OK) {
cass_cluster_free(cluster);
cass_session_free(session);
return -1;
}
execute_query(session,
"CREATE KEYSPACE examples WITH replication = { \
'class': 'SimpleStrategy', 'replication_factor': '3' };");
execute_query(session,
"CREATE TABLE examples.basic (key text, \
bln boolean, \
flt float, dbl double,\
i32 int, i64 bigint, \
PRIMARY KEY (key));");
insert_into_basic(session, "prepared_test", &input);
if (prepare_select_from_basic(session, &prepared) == CASS_OK) {
select_from_basic(session, prepared, "prepared_test", &output);
assert(input.bln == output.bln);
assert(input.flt == output.flt);
assert(input.dbl == output.dbl);
assert(input.i32 == output.i32);
assert(input.i64 == output.i64);
cass_prepared_free(prepared);
}
close_future = cass_session_close(session);
cass_future_wait(close_future);
cass_future_free(close_future);
cass_cluster_free(cluster);
cass_session_free(session);
return 0;
}
Raw
valgrind.txt
==13665== Memcheck, a memory error detector
==13665== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==13665== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==13665== Command: ./examples/prepared/prepared 192.168.56.1
==13665==
1485307017.639 [WARN] (src/connection.cpp:795:void cass::Connection::notify_error(const string&, cass::Connection::ConnectionError)): Host 192.168.56.1 received invalid protocol response Invalid or unsupported protocol version: 4
1485307017.673 [WARN] (src/control_connection.cpp:213:virtual void cass::ControlConnection::on_close(cass::Connection*)): Lost control connection on host 192.168.56.1
1485307017.674 [WARN] (src/control_connection.cpp:232:virtual void cass::ControlConnection::on_close(cass::Connection*)): Host 192.168.56.1 does not support protocol version 4. Trying protocol version 3...
Error: Cannot add existing keyspace "examples"
Error: Cannot add already existing column family "basic" to keyspace "examples"
==13665==
==13665== HEAP SUMMARY:
==13665== in use at exit: 522,134 bytes in 7,435 blocks
==13665== total heap usage: 12,423 allocs, 4,988 frees, 27,729,470 bytes allocated
==13665==
==13665== 28,346 (96 direct, 28,250 indirect) bytes in 1 blocks are definitely lost in loss record 164 of 166
==13665== at 0x4C2B0E0: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==13665== by 0x50B0548: __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<std::string const, cass::MetadataField> > >::allocate(unsigned long, void const*) (new_allocator.h:104)
==13665== by 0x50AB27F: std::_Rb_tree<std::string, std::pair<std::string const, cass::MetadataField>, std::_Select1st<std::pair<std::string const, cass::MetadataField> >, std::less<std::string>, std::allocator<std::pair<std::string const, cass::MetadataField> > >::_M_get_node() (stl_tree.h:370)
==13665== by 0x50A2ED6: std::_Rb_tree_node<std::pair<std::string const, cass::MetadataField> >* std::_Rb_tree<std::string, std::pair<std::string const, cass::MetadataField>, std::_Select1st<std::pair<std::string const, cass::MetadataField> >, std::less<std::string>, std::allocator<std::pair<std::string const, cass::MetadataField> > >::_M_create_node<std::piecewise_construct_t const&, std::tuple<std::string const&>, std::tuple<> >(std::piecewise_construct_t const&, std::tuple<std::string const&>&&, std::tuple<>&&) (stl_tree.h:403)
==13665== by 0x509CE6F: std::_Rb_tree_iterator<std::pair<std::string const, cass::MetadataField> > std::_Rb_tree<std::string, std::pair<std::string const, cass::MetadataField>, std::_Select1st<std::pair<std::string const, cass::MetadataField> >, std::less<std::string>, std::allocator<std::pair<std::string const, cass::MetadataField> > >::_M_emplace_hint_unique<std::piecewise_construct_t const&, std::tuple<std::string const&>, std::tuple<> >(std::_Rb_tree_const_iterator<std::pair<std::string const, cass::MetadataField> >, std::piecewise_construct_t const&, std::tuple<std::string const&>&&, std::tuple<>&&) (stl_tree.h:1669)
==13665== by 0x5098F03: std::map<std::string, cass::MetadataField, std::less<std::string>, std::allocator<std::pair<std::string const, cass::MetadataField> > >::operator[](std::string const&) (stl_map.h:465)
==13665== by 0x5088DF4: cass::MetadataBase::add_field(cass::SharedRefPtr<cass::RefBuffer> const&, cass::Row const*, std::string const&) (metadata.cpp:1001)
==13665== by 0x509168E: cass::ColumnMetadata::ColumnMetadata(cass::MetadataConfig const&, std::string const&, cass::KeyspaceMetadata*, cass::SharedRefPtr<cass::RefBuffer> const&, cass::Row const*) (metadata.cpp:1796)
==13665== by 0x5094789: cass::Metadata::InternalData::update_columns(cass::MetadataConfig const&, cass::ResultResponse*) (metadata.cpp:2210)
==13665== by 0x508836D: cass::Metadata::update_columns(cass::ResultResponse*) (metadata.cpp:846)
==13665== by 0x5028F82: cass::ControlConnection::on_query_meta_schema(cass::ControlConnection*, cass::ControlConnection::UnusedData const&, std::map<std::string, cass::SharedRefPtr<cass::Response>, std::less<std::string>, std::allocator<std::pair<std::string const, cass::SharedRefPtr<cass::Response> > > > const&) (control_connection.cpp:525)
==13665== by 0x502FF63: cass::ControlConnection::ControlMultipleRequestHandler<cass::ControlConnection::UnusedData>::on_set(std::map<std::string, cass::SharedRefPtr<cass::Response>, std::less<std::string>, std::allocator<std::pair<std::string const, cass::SharedRefPtr<cass::Response> > > > const&) (control_connection.cpp:1022)
==13665==
==13665== 493,788 (456 direct, 493,332 indirect) bytes in 1 blocks are definitely lost in loss record 166 of 166
==13665== at 0x4C2B0E0: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==13665== by 0x5071492: cass::Session::prepare(char const*, unsigned long) (session.cpp:536)
==13665== by 0x506EB40: cass_session_prepare_n (session.cpp:83)
==13665== by 0x506EB13: cass_session_prepare (session.cpp:77)
==13665== by 0x40190C: prepare_select_from_basic (prepared.c:125)
==13665== by 0x401C07: main (prepared.c:211)
==13665==
==13665== LEAK SUMMARY:
==13665== definitely lost: 552 bytes in 2 blocks
==13665== indirectly lost: 521,582 bytes in 7,433 blocks
==13665== possibly lost: 0 bytes in 0 blocks
==13665== still reachable: 0 bytes in 0 blocks
==13665== suppressed: 0 bytes in 0 blocks
==13665==
==13665== For counts of detected and suppressed errors, rerun with: -v
==13665== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
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