On Fri, Aug 4, 2017 at 3:54 AM, Uros Bizjak <ubiz...@gmail.com> wrote: > > The problem was following: > > runtime.Breakpoint comprises only call to __builtin_trap (), which in > case of alpha maps to "call_pall 0x81". Since __builtin_trap () is a > noreturn function, no other instructions are emitted after call_pal. > > However, when call_pal insn is executed, alpha updates program counter > before the signal is raised. As call_pal was the last insn, updated PC > points outside of the function boundaries, and backtrace (and gdb, > FWIW) failed to found enclosing function. > > The solution is to emit nop after call_pal insn, so PC will always > remain between function boundaries. > > Attached patch implements dumpregs function for alpha.
Thanks for analyzing the problem. I committed the dump-registers patch to mainline. Ian
