This is the mail archive of the java@gcc.gnu.org mailing list for the Java project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: sysdep/i386/backtrace.h infinite loop?

Marco Trudel writes:
 > Maybe a stupid question, but how can this loop in 
 > sysdep/i386/backtrace.h ever end:
 > 
 > register _Jv_uintptr_t *_ebp __asm__ ("ebp");
 > _Jv_uintptr_t rfp;
 > for (rfp = *_ebp; rfp; rfp = *(_Jv_uintptr_t *)rfp)
 > {
 >    // only read access for rfp
 > }
 > 
 > Maybe because "*(_Jv_uintptr_t *)rfp" is changing it, but I can't see how...

It looks to me like it's walking down a linked list until it hits NULL.

Andrew.
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]