test/gdb-lock.m

   1 // TEST_CFLAGS -framework Foundation
   2
   3 #import <Foundation/Foundation.h>
   4 #import <objc/runtime.h>
   5 #import <objc/objc-gdb.h>
   6
   7 #include "test.h"
   8
   9 @interface Foo : NSObject
  10 @end
  11 @implementation Foo
  12 - (void) foo
  13 {
  14 }
  15
  16 - (void) test: __attribute__((unused)) sender
  17 {
  18     unsigned int x = 0;
  19     Method foo = class_getInstanceMethod([Foo class], @selector(foo));
  20     IMP fooIMP = method_getImplementation(foo);
  21     const char *fooTypes = method_getTypeEncoding(foo);
  22     while(1) {
  23         NSAutoreleasePool *p = [[NSAutoreleasePool alloc] init];
  24         char newSELName[100];
  25         sprintf(newSELName, "a%u", x++);
  26         SEL newSEL = sel_registerName(newSELName);
  27         class_addMethod([Foo class], newSEL, fooIMP, fooTypes);
  28         [self performSelector: newSEL];
  29         [p drain];
  30     }
  31 }
  32 @end
  33
  34 int main() {
  35     NSAutoreleasePool *p = [[NSAutoreleasePool alloc] init];
  36     [NSThread detachNewThreadSelector: @selector(test:) toTarget: [Foo new] withObject: nil];
  37     unsigned int x = 0;
  38     unsigned int lockCount = 0;
  39     while(1) {
  40         if (gdb_objc_isRuntimeLocked())
  41             lockCount++;
  42         x++;
  43         if (x > 1000000)
  44             break;
  45     }
  46     if (lockCount < 10) {
  47         fail("Runtime not locked very much.");
  48     }
  49     [p drain];
  50
  51     succeed(__FILE__);
  52
  53     return 0;
  54 }