gcc/testsuite/c-c++-common/analyzer/allocation-size-multiline-3.c

   1 /* Verify that we warn for incorrect uses of "alloca" (which may be in a
   2    macro in a system header), and that the output looks correct.  */
   3
   4 /* { dg-additional-options "-fdiagnostics-path-format=inline-events -fdiagnostics-show-caret -fanalyzer-fine-grained" } */
   5 /* { dg-require-effective-target alloca } */
   6
   7 #include <stdint.h>
   8 #include "../../gcc.dg/analyzer/test-alloca.h"
   9
  10 void test_constant_99 (void)
  11 {
  12   int32_t *ptr = (int32_t *) alloca (99); /* { dg-warning "allocated buffer size is not a multiple of the pointee's size" } */
  13 }
  14
  15 /* { dg-begin-multiline-output "" }
  16    int32_t *ptr = (int32_t *) alloca (99);
  17                               ^~~~~~
  18   'test_constant_99': events 1-2
  19     |
  20     |   int32_t *ptr = (int32_t *) alloca (99);
  21     |                              ^~~~~~
  22     |                              |
  23     |                              (1) allocated 99 bytes here
  24     |                              (2) assigned to 'int32_t *' {aka '{re:long :re?}int *'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  25     |
  26    { dg-end-multiline-output "" { target c } } */
  27 /* { dg-begin-multiline-output "" }
  28    int32_t *ptr = (int32_t *) alloca (99);
  29                               ^~~~~~
  30   'void test_constant_99()': events 1-2
  31     |
  32     |   int32_t *ptr = (int32_t *) alloca (99);
  33     |                              ^~~~~~
  34     |                              |
  35     |                              (1) allocated 99 bytes here
  36     |                              (2) assigned to 'int32_t*' {aka '{re:long :re?}int*'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  37     |
  38    { dg-end-multiline-output "" { target c++ } } */
  39
  40 void test_symbolic (int n)
  41 {
  42   int32_t *ptr = (int32_t *) alloca (n * 2); /* { dg-warning "allocated buffer size is not a multiple of the pointee's size" } */
  43 }
  44
  45 /* { dg-begin-multiline-output "" }
  46    int32_t *ptr = (int32_t *) alloca (n * 2);
  47                               ^~~~~~
  48   'test_symbolic': events 1-2
  49     |
  50     |   int32_t *ptr = (int32_t *) alloca (n * 2);
  51     |                              ^~~~~~
  52     |                              |
  53     |                              (1) allocated 'n * 2' bytes here
  54     |                              (2) assigned to 'int32_t *' {aka '{re:long :re?}int *'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  55     |
  56    { dg-end-multiline-output "" { target c } } */
  57 /* { dg-begin-multiline-output "" }
  58    int32_t *ptr = (int32_t *) alloca (n * 2);
  59                               ^~~~~~
  60   'void test_symbolic(int)': events 1-2
  61     |
  62     |   int32_t *ptr = (int32_t *) alloca (n * 2);
  63     |                              ^~~~~~
  64     |                              |
  65     |                              (1) allocated '(n * 2)' bytes here
  66     |                              (2) assigned to 'int32_t*' {aka '{re:long :re?}int*'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  67     |
  68    { dg-end-multiline-output "" { target c++ } } */