> It wouldn't surprise me if kobj_getsymname() needed a lock that was
> being held by the thread doing modload. (Modload changes the kernel
> symbol table by loading in a new binary, after all.)
That, and using 4K of stack seems like a bad idea, especially when
only 10 stack frames are being recorded by getpcstack().
> > I coded thus:
> >
> > 23 int _init(void)
> > 24 {
> > 25 int i, depth, status;
> > 26 pc_t mystack[1024];
> > 27 char *sym;
> > 28 ulong_t off;
> > 29
> > 30 status = mod_install(&modlinkage);
> > 31 cmn_err(CE_NOTE,"me filed\n");
> > 32 depth = getpcstack(mystack, 10);
> > 33 for (i = 0; i < depth; i++) {
> > 34 sym = kobj_getsymname((uintptr_t)mystack[i],
> > &off);
> > 35 cmn_err(CE_NOTE, "sym=%s %x %d\n", sym,
> > (uintptr_t) myst
> > ack[i], off);
> > 36 }
> > 37 return status;
> > 38 }
> >
> > Technically is there any problem with this piece of code?
> >
> > modloading it will result in hanging the system.
--
meem
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