1 2 /* Check for correct handling of static vs non-static, local vs 3 non-local variables in a zero-biased executable. */ 4 /* Relevant compile flags are: 5 6 -Wall -g -I$prefix/include/valgrind 7 8 eg -Wall -g -I`pwd`/Inst/include/valgrind 9 */ 10 /* Unfortunately 2008 Feb 26, requires its own filter_varinfo3, since 11 nonstatic_local_{un}def are not handled properly and so end up with 12 compiler-dependent names, eg static_local_def.2919 and 13 static_local_undef.2921. So filter off the .nnnn part. */ 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <assert.h> 17 #include "memcheck/memcheck.h" 18 /* Cause memcheck to complain about the address "a" and so to print 19 its best guess as to what "a" actually is. a must be 20 addressible. */ 21 void croak ( void* aV ) 22 { 23 char* a = (char*)aV; 24 char* undefp = malloc(1); 25 char saved = *a; 26 assert(undefp); 27 *a = *undefp; 28 (void) VALGRIND_CHECK_MEM_IS_DEFINED(a, 1); 29 *a = saved; 30 free(undefp); 31 } 32 33 #include <stdio.h> 34 35 static char static_global_def[10] = {0,0,0,0,0, 0,0,0,0,0}; 36 char nonstatic_global_def[10] = {0,0,0,0,0, 0,0,0,0,0}; 37 static char static_global_undef[10]; 38 char nonstatic_global_undef[10]; 39 40 void bar ( char* p1, char* p2, char* p3, char* p4 ) 41 { 42 croak(p1); 43 croak(p2); 44 croak(p3); 45 croak(p4); 46 } 47 48 void foo ( void ) 49 { 50 static char static_local_def[10] = {0,0,0,0,0, 0,0,0,0,0}; 51 char nonstatic_local_def[10] = {0,0,0,0,0, 0,0,0,0,0}; 52 static char static_local_undef[10]; 53 char nonstatic_local_undef[10]; 54 croak ( 1 + (char*)&static_global_def ); 55 croak ( 2 + (char*)&nonstatic_global_def ); 56 croak ( 3 + (char*)&static_global_undef ); 57 croak ( 4 + (char*)&nonstatic_global_undef ); 58 bar( 5 + (char*)&static_local_def, 59 6 + (char*)&nonstatic_local_def, 60 7 + (char*)&static_local_undef, 61 8 + (char*)&nonstatic_local_undef ); 62 } 63 64 int main ( void ) 65 { 66 foo(); 67 return 0; 68 } 69
