aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--erts/doc/src/erlang.xml8
-rw-r--r--erts/emulator/beam/erl_bif_info.c4
-rw-r--r--erts/emulator/test/process_SUITE.erl11
3 files changed, 19 insertions, 4 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 9646953518..112682d713 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -4899,7 +4899,9 @@ RealSystem = system + MissedSystem</code>
<p>Returns the current call stack back-trace (<em>stacktrace</em>)
of the process. The stack has the same format as returned by
<seealso marker="#get_stacktrace/0">
- <c>erlang:get_stacktrace/0</c></seealso>.</p>
+ <c>erlang:get_stacktrace/0</c></seealso>. The depth of the
+ stacktrace is truncated according to the <c>backtrace_depth</c>
+ system flag setting.</p>
</item>
<tag><c>{dictionary, <anno>Dictionary</anno>}</c></tag>
<item>
@@ -6611,7 +6613,9 @@ ok
<fsummary>Set system flag <c>backtrace_depth</c>.</fsummary>
<desc>
<p>Sets the maximum depth of call stack back-traces in the
- exit reason element of <c>'EXIT'</c> tuples.</p>
+ exit reason element of <c>'EXIT'</c> tuples. The flag
+ also limits the stacktrace depth returned by <c>process_info</c>
+ item <c>current_stacktrace.</c></p>
<p>Returns the old value of the flag.</p>
</desc>
</func>
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,