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<?php function leak(int $bytes){ static $leaks=[]; $leaks[]=str_repeat('A',$bytes); } echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000); echo memory_get_usage(false),PHP_EOL; leak(100*1000);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/D8iJa
function name:  (null)
number of ops:  89
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   INIT_FCALL                                               'memory_get_usage'
          1        SEND_VAL                                                 <false>
          2        DO_ICALL                                         $0      
          3        ECHO                                                     $0
          4        ECHO                                                     '%0A'
    8     5        INIT_FCALL                                               'leak'
          6        SEND_VAL                                                 100000
          7        DO_FCALL                                      0          
    9     8        INIT_FCALL                                               'memory_get_usage'
          9        SEND_VAL                                                 <false>
         10        DO_ICALL                                         $2      
         11        ECHO                                                     $2
         12        ECHO                                                     '%0A'
   10    13        INIT_FCALL                                               'leak'
         14        SEND_VAL                                                 100000
         15        DO_FCALL                                      0          
   11    16        INIT_FCALL                                               'memory_get_usage'
         17        SEND_VAL                                                 <false>
         18        DO_ICALL                                         $4      
         19        ECHO                                                     $4
         20        ECHO                                                     '%0A'
   12    21        INIT_FCALL                                               'leak'
         22        SEND_VAL                                                 100000
         23        DO_FCALL                                      0          
   13    24        INIT_FCALL                                               'memory_get_usage'
         25        SEND_VAL                                                 <false>
         26        DO_ICALL                                         $6      
         27        ECHO                                                     $6
         28        ECHO                                                     '%0A'
   14    29        INIT_FCALL                                               'leak'
         30        SEND_VAL                                                 100000
         31        DO_FCALL                                      0          
   15    32        INIT_FCALL                                               'memory_get_usage'
         33        SEND_VAL                                                 <false>
         34        DO_ICALL                                         $8      
         35        ECHO                                                     $8
         36        ECHO                                                     '%0A'
   16    37        INIT_FCALL                                               'leak'
         38        SEND_VAL                                                 100000
         39        DO_FCALL                                      0          
   17    40        INIT_FCALL                                               'memory_get_usage'
         41        SEND_VAL                                                 <false>
         42        DO_ICALL                                         $10     
         43        ECHO                                                     $10
         44        ECHO                                                     '%0A'
   18    45        INIT_FCALL                                               'leak'
         46        SEND_VAL                                                 100000
         47        DO_FCALL                                      0          
   19    48        INIT_FCALL                                               'memory_get_usage'
         49        SEND_VAL                                                 <false>
         50        DO_ICALL                                         $12     
         51        ECHO                                                     $12
         52        ECHO                                                     '%0A'
   20    53        INIT_FCALL                                               'leak'
         54        SEND_VAL                                                 100000
         55        DO_FCALL                                      0          
   21    56        INIT_FCALL                                               'memory_get_usage'
         57        SEND_VAL                                                 <false>
         58        DO_ICALL                                         $14     
         59        ECHO                                                     $14
         60        ECHO                                                     '%0A'
   22    61        INIT_FCALL                                               'leak'
         62        SEND_VAL                                                 100000
         63        DO_FCALL                                      0          
   23    64        INIT_FCALL                                               'memory_get_usage'
         65        SEND_VAL                                                 <false>
         66        DO_ICALL                                         $16     
         67        ECHO                                                     $16
         68        ECHO                                                     '%0A'
   24    69        INIT_FCALL                                               'leak'
         70        SEND_VAL                                                 100000
         71        DO_FCALL                                      0          
   25    72        INIT_FCALL                                               'memory_get_usage'
         73        SEND_VAL                                                 <false>
         74        DO_ICALL                                         $18     
         75        ECHO                                                     $18
         76        ECHO                                                     '%0A'
   26    77        INIT_FCALL                                               'leak'
         78        SEND_VAL                                                 100000
         79        DO_FCALL                                      0          
   27    80        INIT_FCALL                                               'memory_get_usage'
         81        SEND_VAL                                                 <false>
         82        DO_ICALL                                         $20     
         83        ECHO                                                     $20
         84        ECHO                                                     '%0A'
   28    85        INIT_FCALL                                               'leak'
         86        SEND_VAL                                                 100000
         87        DO_FCALL                                      0          
         88      > RETURN                                                   1

Function leak:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/D8iJa
function name:  leak
number of ops:  9
compiled vars:  !0 = $bytes, !1 = $leaks
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        BIND_STATIC                                              !1
    5     2        INIT_FCALL                                               'str_repeat'
          3        SEND_VAL                                                 'A'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $3      
          6        ASSIGN_DIM                                               !1
          7        OP_DATA                                                  $3
    6     8      > RETURN                                                   null

End of function leak

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
161.63 ms | 1410 KiB | 29 Q