From 9104dc674c265b82728a1b494194fdeea4ad6661 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Fri, 11 Mar 2011 08:29:47 +0100 Subject: Fix duplicate entries in stacktraces after calling certain BIFs Calling a BIF thaf is called as a function (such as process_info/{1,2}) would leave a non-zero value in c_p->cp, which would lead to duplicate entries in the stacktrace. --- erts/emulator/beam/beam_emu.c | 1 + erts/emulator/test/exception_SUITE.erl | 14 +++++++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) (limited to 'erts') diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c index 7b2aac0908..8991f7b198 100644 --- a/erts/emulator/beam/beam_emu.c +++ b/erts/emulator/beam/beam_emu.c @@ -3413,6 +3413,7 @@ void process_main(void) r(0) = nif_bif_result; CHECK_TERM(r(0)); SET_I(c_p->cp); + c_p->cp = 0; Goto(*I); } else if (c_p->freason == TRAP) { SET_I(*((BeamInstr **) (UWord) ((c_p)->def_arg_reg + 3))); diff --git a/erts/emulator/test/exception_SUITE.erl b/erts/emulator/test/exception_SUITE.erl index d44dc117d2..9d6fc9521d 100644 --- a/erts/emulator/test/exception_SUITE.erl +++ b/erts/emulator/test/exception_SUITE.erl @@ -275,7 +275,16 @@ stacktrace(Conf) when is_list(Conf) -> ?line [{?MODULE,stacktrace_1,3}|_] = erase(stacktrace1), ?line St4 = erase(stacktrace2), ?line St4 = erlang:get_stacktrace(), - ok. + + try + ?line stacktrace_2() + catch + error:{badmatch,_} -> + [{?MODULE,stacktrace_2,0}, + {?MODULE,stacktrace,1}|_] = + erlang:get_stacktrace(), + ok + end. stacktrace_1(X, C1, Y) -> erase(stacktrace1), @@ -295,6 +304,9 @@ stacktrace_1(X, C1, Y) -> put(stacktrace2, erlang:get_stacktrace()) end. +stacktrace_2() -> + ok = erlang:process_info(self(), current_function), + ok. nested_stacktrace(Conf) when is_list(Conf) -> -- cgit v1.2.3