Bug #79921 [Opn->Wfx]: memory exhausted, on array definition, in require

Edit report at https://bugs.php.net/bug.php?id=79921&edit=1 ID: 79921 Updated by: nikic@php.net Reported by: chandleg at wizardsworks dot org Summary: memory exhausted, on array definition, in require -Status: Open +Status: Wont fix Type: Bug Package: Scripting Engine problem Operating System: Slackware Linux PHP Version: 7.2.32 Block user comment: N Private report: N New Comment: I can reproduce the issue with the provided script. The problem is that your generated code missing a ")," at the end of each line, which means that instead of generating a simple array of arrays, it generates a 10000-level deeply nested array, and the parser runs out of parser stack memory. Now we *could* raise YYMAXDEPTH from the default of 10000, but given that the generated code is incorrect (and would fail to parse anyway in the end), this example does not seem like a good motivation to do so. Previous Comments: ------------------------------------------------------------------------ [2020-08-03 05:13:52] chandleg at wizardsworks dot org This will generate a config, one which should result in 10006 lines of output, which can be redirected to a file. I run it: php create.php >config.php <?php $num_stars = 10000; $star_map = array(); $width = 2500; $height = 1000; $x_origin = ( $width / 2 ); $y_origin = ( $height / 2 ); $sol_radius = 696347055.36; $sol_mass = 1.98847 * pow(10, 30); $light_year = 9.4607 * pow(10, 15); $G = 6.67408 * pow(10, -11); $c = 299792458; #### BlackHole, Class D, Class M, Class K, Class, G, Class F, Class A, Class B, Class O $star_radius = array(0, ( 2.765945676 * pow(10, -27) ), 0.4, 0.9, 1.1, 1.3, 2.5, 7, 15); $star_mass = array(0, 1.4, 0.3, 0.8, 1.1, 1.7, 3.2, 18, 60); #### 1-800 Binary, 801-819% Trinary, 820-900% Single $star_systems_chart = array(array(1, 158), array(159, 979), array(980, 1000)); #### BlackHole, Class D, Class M, Class K, Class, G, Class F, Class A, Class B, Class O $star_system_distribution_chart = array(array(1, 100000), array(100001, 150000), array(150001, 866964), array(866965, 936965), array(936966, 971996), array(971996, 991996), array(991997, 998997), array(998998, 999998), array(999999, 1000000)); #$star_colors = array( $BlackHole, $Neutron, $Class_M, $Class_K, $Class_G, $Class_F, $Class_A, $Class_B, $Class_O ); function find_in_chart ( $value, $chart ) { for ( $x = 0; $x < count($chart); $x = $x + 1 ) { if (( $value >= $chart[$x][0] ) and ( $value <= $chart[$x][1] )) { return $x; } else { } } } function devation ( $value, $low, $high ) { $dev = rand(( $low / 100 ), ( $high / 100 )); return ( $value + ( $value * $dev ) ); } function blackhole ( ) { global $G, $c, $sol_radius, $sol_mass; $mass = ( rand(3, 70) * $sol_mass ); $radius = (( 2 * $mass * $G ) / pow($c, 2)); return array($mass, $radius); } function array_output ( $tmp_array ) { $tmp = "array("; foreach ( $tmp_array as $key => $value ) { $tmp = $tmp . $value . ", "; } return trim($tmp, ", ") . "), "; } echo "<?php\n\$star_map = array (\n"; for ( $x = 1; $x <= $num_stars; $x = $x + 1 ) { $i = rand(( 1 - $x_origin ), $x_origin); $j = rand(( 1 - $y_origin ), $y_origin); $k = rand(-1000, 1000); #### Calculate distance between origin and end of vector $distance = sqrt(pow($i, 2) + pow($i, 2) + pow($k, 2)); #### 1-800 Binary, 801-819% Trinary, 820-900% Single, 901-908 Neutron Star, 909-1000 BlackHole $star_system_count = rand(1, 1000); $stars = ( find_in_chart($star_system_count, $star_systems_chart) + 1 ); $star_system = array(); $masses = array(); $radius = array(); for ( $y = 1 ; $y <= $stars; $y = $y + 1 ) { # $class = rand(0, 6); #### Class $Class = find_in_chart(rand(1, 1000000), $star_system_distribution_chart); $star_system[$y] = $Class; if ( $Class != 0 ) { #### Mass $masses[$y] = devation($sol_mass * $star_mass[$Class], -10, 10); #### Radius $radius[$y] = devation($sol_radius * $star_radius[$Class], -10, 10); } else { $tmp = blackhole(); $masses[$y] = $tmp[0]; $radius[$y] = $tmp[1]; } } $star_map[] = array($i, $j, $k, $distance, $star_system, $masses, $radius); echo "array($i, $j, $k, $distance, "; echo array_output($star_system); echo array_output($masses); echo array_output($radius); echo "\n"; } echo ");\n?>\n" ?> ------------------------------------------------------------------------ [2020-08-02 09:56:20] cmb@php.net > Alternatively I can also post the code used to generate the file > itself. That may be helpful. ------------------------------------------------------------------------ [2020-08-01 21:43:50] chandleg at wizardsworks dot org Alternatively I can also post the code used to generate the file itself. ------------------------------------------------------------------------ [2020-08-01 21:42:24] chandleg at wizardsworks dot org I genuinely don't know. Of all the machines I have this one has the latest version of PHP installed. I can drop the config file in a place to test, if someone who does have a machine laying around with a newer version installed wants to try. ------------------------------------------------------------------------ [2020-08-01 15:22:19] cmb@php.net Does that also happen with any of the actively supported PHP versions[1]? [1] <https://www.php.net/supported-versions.php> ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=79921 -- Edit this bug report at https://bugs.php.net/bug.php?id=79921&edit=1