massif/tests/thresholds.c

   1 // This test is for testing that the --threshold options in both Massif and
   2 // ms_print work as they should.  A threshold of 10% is a good choice for
   3 // this file, because in some parts of the tree it renders all children
   4 // insignificant, and in others parts of the tree it renders only some
   5 // children insignificant.
   6 //
   7 // Also, it's deliberate that the 'malloc(2000)' and 'my_malloc1(500)' calls
   8 // are in 'main' -- at one point, ms_print was failing to connect some
   9 // children arrows when a more significant child didn't have any children of
  10 // its own, eg:
  11 //
  12 //   |
  13 //   ->20.00% (2000B) 0x804846A: main (thresholds.c:43)
  14 //
  15 //   ->13.00% (1300B) 0x80483A4: my_malloc2 (thresholds.c:16)
  16 //
  17 // (There must be a '|' between the '->'s.)
  18
  19 #include <stdlib.h>
  20
  21 void my_malloc1(int n)
  22 {
  23    malloc(n);
  24 }
  25
  26 void my_malloc2(int n)
  27 {
  28    malloc(n);
  29 }
  30
  31 void my_malloc3(int n)
  32 {
  33    malloc(n);
  34 }
  35
  36 void a7550(void)
  37 {
  38    my_malloc1(48000);
  39    my_malloc2( 7200);
  40 }
  41
  42 void a450(void)
  43 {
  44    my_malloc2(2400);
  45    my_malloc1( 800);
  46    my_malloc2( 800);
  47    my_malloc1( 400);
  48 }
  49
  50 int main(void)
  51 {
  52    a7550();
  53    a450();
  54    my_malloc1(4000);       // All sizes are divisible by 16 -- no slop.
  55    malloc(16000);
  56    my_malloc3(400);
  57    return 0;
  58 }