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    int32_t *ptr = (int32_t *) alloca (99);
  20                               ^~~~~~
  21                               |
  22                               (1) allocated 99 bytes here
  23                               (2) assigned to 'int32_t *' {aka '{re:long :re?}int *'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  24    { dg-end-multiline-output "" { target c } } */
  25 /* { dg-begin-multiline-output "" }
  26    int32_t *ptr = (int32_t *) alloca (99);
  27                               ^~~~~~
  28   'void test_constant_99()': events 1-2
  29    int32_t *ptr = (int32_t *) alloca (99);
  30                               ^~~~~~
  31                               |
  32                               (1) allocated 99 bytes here
  33                               (2) assigned to 'int32_t*' {aka '{re:long :re?}int*'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  34    { dg-end-multiline-output "" { target c++ } } */
  35
  36 void test_symbolic (int n)
  37 {
  38   int32_t *ptr = (int32_t *) alloca (n * 2); /* { dg-warning "allocated buffer size is not a multiple of the pointee's size" } */
  39 }
  40
  41 /* { dg-begin-multiline-output "" }
  42    int32_t *ptr = (int32_t *) alloca (n * 2);
  43                               ^~~~~~
  44   'test_symbolic': events 1-2
  45    int32_t *ptr = (int32_t *) alloca (n * 2);
  46                               ^~~~~~
  47                               |
  48                               (1) allocated 'n * 2' bytes here
  49                               (2) assigned to 'int32_t *' {aka '{re:long :re?}int *'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  50    { dg-end-multiline-output "" { target c } } */
  51 /* { dg-begin-multiline-output "" }
  52    int32_t *ptr = (int32_t *) alloca (n * 2);
  53                               ^~~~~~
  54   'void test_symbolic(int)': events 1-2
  55    int32_t *ptr = (int32_t *) alloca (n * 2);
  56                               ^~~~~~
  57                               |
  58                               (1) allocated '(n * 2)' bytes here
  59                               (2) assigned to 'int32_t*' {aka '{re:long :re?}int*'} here; 'sizeof (int32_t {aka {re:long :re?}int})' is '4'
  60    { dg-end-multiline-output "" { target c++ } } */