Mac OS X 10.4.9 for x86 Source Code
gcc 实现源代码
源代码在线查看: new-delete-2.c
/* APPLE LOCAL file coalescing */ /* Make sure that weak '::new' and '::delete' operators wind up in a coalesced section and get called via a stub. */ /* Author: Ziemowit Laski */ /* { dg-do compile { target powerpc*-*-darwin* } } */ extern "C" void free(void *); void operator delete(void*) throw() __attribute__((weak)); void operator delete(void* p) throw() { free(p); } void operator delete(void*, int) throw() __attribute__((weak)); void *operator new(unsigned long) throw() __attribute__((weak)); void *operator new(unsigned long) throw() { return (void *)0; } int *foo(void) { int *n = new int(); ::operator delete(n, 0); ::operator delete(n); return 0; } /* { dg-final { scan-assembler "coal" } } */ /* { dg-final { scan-assembler "bl L__Znwm.stub" } } */ /* { dg-final { scan-assembler "bl L__ZdlPvi.stub" } } */ /* { dg-final { scan-assembler "bl L__ZdlPv.stub" } } */