The problem happens with master branch.
I have wrote a simple code to demonstrate the problem.
function getRandomData(): Generator
{
for ($i = 0; $i < 10000; $i++) {
yield [
md5((string)random_int(100000, 900000)),
md5((string)random_int(100000, 900000))
];
}
}
function seedDataSwoole(\Swoole\Coroutine\PostgreSQL $connection): void
{
$connection->query("DROP TABLE IF EXISTS test");
$connection->query("CREATE TABLE test (domain VARCHAR(63), tld VARCHAR(63), PRIMARY KEY (domain, tld))");
$connection->prepare("insert", "INSERT INTO test VALUES (\$1, \$2)");
foreach (getRandomData() as $row) {
$connection->execute("insert", $row);
}
$connection->query("DEALLOCATE insert");
}
Swoole\Coroutine\run(function () {
$connection = new \Swoole\Coroutine\PostgreSQL();
$connection->connect("host=127.0.0.1 port=5434 user='makise' password='el-psy-congroo' dbname='makise'");
// uncomment this only for the first run
// seedDataSwoole($connection);
$start = microtime(true);
for ($i = 0; $i < 100; $i++) {
$result = $connection->query('SELECT * FROM test');
while ($row = $connection->fetchAssoc($result)) {
}
}
$end = microtime(true);
$total = $end - $start;
printf("Execution time for Swoole client: %f secs\n", $total);
printf("Peak memory usage for Swoole client: %.2f kb\n", memory_get_peak_usage() / 1024);
});Segmentation fault occurs really random. And it happens only when calling single row fetch functions.
When I call fetchAll - segmentation fault doesn't happens.
php benchmark/select-swoole-raw.php
Execution time for Swoole client: 0.416035 secs
Peak memory usage for Swoole client: 2079.92 kb
php benchmark/select-swoole-raw.php
Execution time for Swoole client: 0.423457 secs
Peak memory usage for Swoole client: 2079.92 kb
php benchmark/select-swoole-raw.php
Segmentation fault
php benchmark/select-swoole-raw.php
Execution time for Swoole client: 0.405166 secs
Peak memory usage for Swoole client: 2079.92 kb
php benchmark/select-swoole-raw.php
Execution time for Swoole client: 0.419964 secs
Peak memory usage for Swoole client: 2079.92 kb
php benchmark/select-swoole-raw.php
Segmentation fault
php benchmark/select-swoole-raw.php
Segmentation fault
php benchmark/select-swoole-raw.php
Segmentation fault
php benchmark/select-swoole-raw.php
Execution time for Swoole client: 0.438378 secs
Peak memory usage for Swoole client: 2079.92 kb
....
poll([{fd=4, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "\27\3\3 \21", 5, 0, NULL, NULL) = 5
recvfrom(4, "\t\217\211jhHM4\360s\232\316\377\3366\353\276\222\373\216Q.\265c\341eQe(Rd\255"..., 8209, 0, NULL, NULL) = 8209
poll([{fd=4, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "\27\3\3 \21", 5, 0, NULL, NULL) = 5
recvfrom(4, "[\262\7Y\312\370;\225\256\0J\354\222Y\247qD\"`Z\261H\352\304X\353~\210\242q\30`"..., 8209, 0, NULL, NULL) = 8209
poll([{fd=4, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "\27\3\3 \21", 5, 0, NULL, NULL) = 5
recvfrom(4, "\244T9B\321\36L\231\363\304\265w\5\355\214\206\16\365\277\274p^\223W\227\345\367\2565\316\355W"..., 8209, 0, NULL, NULL) = 8209
poll([{fd=4, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "\27\3\3 \21", 5, 0, NULL, NULL) = 5
recvfrom(4, "\206L\365\345\362\25D\320\301/\247\35\244\255\317[\343Y\300\210\255hul\37\30\350\337\360\210\304&"..., 8209, 0, NULL, NULL) = 8209
poll([{fd=4, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "\27\3\3 \21", 5, 0, NULL, NULL) = 5
recvfrom(4, "7\306+u\345\1\233\261\367\342]\0\262\261e\10\374P5\260\273\0\337\312\2'\vuy\n\204`"..., 8209, 0, NULL, NULL) = 8209
poll([{fd=4, events=POLLIN|POLLERR}], 1, -1) = 1 ([{fd=4, revents=POLLIN}])
recvfrom(4, "\27\3\3\16O", 5, 0, NULL, NULL) = 5
recvfrom(4, "\330\335\17$R\323\252\334\322\315\n\272\377$\273\16\2534U\277\276Zd:\303\363\326\376*yB\322"..., 3663, 0, NULL, NULL) = 3663
epoll_ctl(3, EPOLL_CTL_DEL, 4, NULL) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x55c00a9207c8} ---
+++ killed by SIGSEGV +++
gdb --args php benchmark/select-swoole-raw.php
(gdb) run
Starting program: /usr/bin/php benchmark/select-swoole-raw.php
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff2db5339 in PQgetisnull () from /lib/x86_64-linux-gnu/libpq.so.5
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