[erlang-questions] Fwd: How to read process's backtrace data?
skyman
cloudzen@REDACTED
Wed Nov 14 16:22:48 CET 2012
Hi erlang developers,
Can anyone answer this question please? Thanks in advance.
Begin forwarded message:
Hi everyone,
erlang:process_display(Pid,backtrace) can display process's backtrace data. For example:
(foo@REDACTED)6> erlang:process_display(self(),backtrace).
Program counter: 0x00cf1498 (unknown function)
CP: 0x0245e8f8 (erl_eval:do_apply/6 + 208)
0x03b1fb34 Return addr 0x01b7f060 (shell:exprs/7 + 368)
y(0) []
y(1) none
0x03b1fb40 Return addr 0x01b7eb94 (shell:eval_exprs/7 + 80)
y(0) []
y(1) []
y(2) cmd
y(3) []
y(4) {value,#Fun<shell.7.20862592>}
y(5) {eval,#Fun<shell.24.20862592>}
y(6) 12305
y(7) []
y(8) []
y(9) []
0x03b1fb6c Return addr 0x01b7e968 (shell:eval_loop/3 + 308)
y(0) []
y(1) []
y(2) []
y(3) []
y(4) <0.30.0>
y(5) Catch 0x01b7ec08 (shell:eval_exprs/7 + 196)
0x03b1fb88 Return addr 0x00a88f6c (<terminate process normally>)
y(0) 12305
y(1) <0.30.0>
true
However, I don't know how to read the information above, such as what do "Program counter", Return addr", "+ 368" and "y(0) y(1) ..." mean? Can anyone teach me?
Thanks in advance!
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