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authorSverker Eriksson <[email protected]>2016-12-20 18:30:12 +0100
committerGitHub <[email protected]>2016-12-20 18:30:12 +0100
commit420aa50e766560c3316a16695c8c3c1c46138aff (patch)
tree083586ea689839c088d1529d305093101b3b971c /erts/emulator
parentac2de409f9379544234f3356974feb2ac15d4818 (diff)
parent2f8d59aa9e8a96d094172db339fd94aae45a90b5 (diff)
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Merge pull request #1263 from hawk/hm/stacktrace-depth/OTP-14119
Make depth of current_stacktrace configurable
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/erl_bif_info.c4
-rw-r--r--erts/emulator/test/process_SUITE.erl11
2 files changed, 13 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index 735aabbee3..88a052cad7 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -1672,11 +1672,11 @@ current_stacktrace(Process* p, Process* rp, Eterm** hpp)
Eterm mfa;
Eterm res = NIL;
- depth = 8;
+ depth = erts_backtrace_depth;
sz = offsetof(struct StackTrace, trace) + sizeof(BeamInstr *)*depth;
s = (struct StackTrace *) erts_alloc(ERTS_ALC_T_TMP, sz);
s->depth = 0;
- if (rp->i) {
+ if (depth > 0 && rp->i) {
s->trace[s->depth++] = rp->i;
depth--;
}
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl
index 0f999e0efe..2289cbabc7 100644
--- a/erts/emulator/test/process_SUITE.erl
+++ b/erts/emulator/test/process_SUITE.erl
@@ -437,11 +437,22 @@ t_process_info(Config) when is_list(Config) ->
verify_loc(Line2, Res2),
pi_stacktrace([{?MODULE,t_process_info,1,?LINE}]),
+ verify_stacktrace_depth(),
+
Gleader = group_leader(),
{group_leader, Gleader} = process_info(self(), group_leader),
{'EXIT',{badarg,_Info}} = (catch process_info('not_a_pid')),
ok.
+verify_stacktrace_depth() ->
+ CS = current_stacktrace,
+ OldDepth = erlang:system_flag(backtrace_depth, 0),
+ {CS,[]} = erlang:process_info(self(), CS),
+ _ = erlang:system_flag(backtrace_depth, 8),
+ {CS,[{?MODULE,verify_stacktrace_depth,0,_},_|_]} =
+ erlang:process_info(self(), CS),
+ _ = erlang:system_flag(backtrace_depth, OldDepth).
+
pi_stacktrace(Expected0) ->
{Line,Res} = {?LINE,erlang:process_info(self(), current_stacktrace)},
{current_stacktrace,Stack} = Res,