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authorLukas Larsson <[email protected]>2017-04-21 14:54:33 +0200
committerLukas Larsson <[email protected]>2017-04-25 14:17:18 +0200
commiteec41eeed17682a4e1f8ca15d92a2b469f0c39b8 (patch)
treed67679c453a4033959dfc3cd09d71e5c4c6e558b /erts/emulator
parentab048d66c59fa827bf4129fc95bec21488a931a4 (diff)
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erts: Add erlang:list_to_port/1 debug bif
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/bif.c69
-rw-r--r--erts/emulator/beam/bif.tab1
-rw-r--r--erts/emulator/test/list_bif_SUITE.erl21
3 files changed, 88 insertions, 3 deletions
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index 214de3652f..d7a18e8d88 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -4254,6 +4254,75 @@ BIF_RETTYPE list_to_pid_1(BIF_ALIST_1)
BIF_ERROR(BIF_P, BADARG);
}
+BIF_RETTYPE list_to_port_1(BIF_ALIST_1)
+{
+ /*
+ * A valid port identifier is on the format
+ * "#Port<N.P>" where N is node and P is
+ * the port id. Both N and P are of type Uint32.
+ */
+ Uint32 n, p;
+ char* cp;
+ int i;
+ DistEntry *dep = NULL;
+ char buf[6 /* #Port< */
+ + (2)*(10 + 1) /* N.P> */
+ + 1 /* \0 */];
+
+ /* walk down the list and create a C string */
+ if ((i = intlist_to_buf(BIF_ARG_1, buf, sizeof(buf)-1)) < 0)
+ goto bad;
+
+ buf[i] = '\0'; /* null terminal */
+
+ cp = &buf[0];
+ if (strncmp("#Port<", cp, 6) != 0)
+ goto bad;
+
+ cp += 6; /* strlen("#Port<") */
+
+ if (sscanf(cp, "%u.%u>", &n, &p) < 2)
+ goto bad;
+
+ if (p > ERTS_MAX_PORT_NUMBER)
+ goto bad;
+
+ dep = erts_channel_no_to_dist_entry(n);
+
+ if (!dep)
+ goto bad;
+
+ if(dep == erts_this_dist_entry) {
+ erts_deref_dist_entry(dep);
+ BIF_RET(make_internal_port(p));
+ }
+ else {
+ ExternalThing *etp;
+ ErlNode *enp;
+
+ if (is_nil(dep->cid))
+ goto bad;
+
+ enp = erts_find_or_insert_node(dep->sysname, dep->creation);
+ ASSERT(enp != erts_this_node);
+
+ etp = (ExternalThing *) HAlloc(BIF_P, EXTERNAL_THING_HEAD_SIZE + 1);
+ etp->header = make_external_port_header(1);
+ etp->next = MSO(BIF_P).first;
+ etp->node = enp;
+ etp->data.ui[0] = p;
+
+ MSO(BIF_P).first = (struct erl_off_heap_header*) etp;
+ erts_deref_dist_entry(dep);
+ BIF_RET(make_external_port(etp));
+ }
+
+ bad:
+ if (dep)
+ erts_deref_dist_entry(dep);
+ BIF_ERROR(BIF_P, BADARG);
+}
+
BIF_RETTYPE list_to_ref_1(BIF_ALIST_1)
{
/*
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index 66e5dc2988..56d656a173 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -88,6 +88,7 @@ bif erlang:list_to_binary/1
bif erlang:list_to_float/1
bif erlang:list_to_integer/1
bif erlang:list_to_pid/1
+bif erlang:list_to_port/1
bif erlang:list_to_ref/1
bif erlang:list_to_tuple/1
bif erlang:loaded/0
diff --git a/erts/emulator/test/list_bif_SUITE.erl b/erts/emulator/test/list_bif_SUITE.erl
index 514dd2f412..9e1e351cd2 100644
--- a/erts/emulator/test/list_bif_SUITE.erl
+++ b/erts/emulator/test/list_bif_SUITE.erl
@@ -23,7 +23,7 @@
-export([all/0, suite/0]).
-export([hd_test/1,tl_test/1,t_length/1,t_list_to_pid/1,
- t_list_to_float/1,t_list_to_integer/1]).
+ t_list_to_port/1,t_list_to_float/1,t_list_to_integer/1]).
suite() ->
@@ -32,7 +32,7 @@ suite() ->
all() ->
- [hd_test, tl_test, t_length, t_list_to_pid,
+ [hd_test, tl_test, t_length, t_list_to_pid, t_list_to_port,
t_list_to_float, t_list_to_integer].
%% Tests list_to_integer and string:to_integer
@@ -106,10 +106,25 @@ t_list_to_pid(Config) when is_list(Config) ->
{'EXIT', {badarg, _}} ->
ok;
Res ->
- ct:fail("list_to_pid/1 with incorrect arg succeeded.~nResult: ~p", [Res])
+ ct:fail("list_to_pid/1 with incorrect arg succeeded.~n"
+ "Result: ~p", [Res])
end,
ok.
+%% Test list_to_port/1 with correct and incorrect arguments.
+
+t_list_to_port(Config) when is_list(Config) ->
+ Me = hd(erlang:ports()),
+ MyListedPid = port_to_list(Me),
+ Me = list_to_port(MyListedPid),
+ case catch list_to_port(id("Incorrect list")) of
+ {'EXIT', {badarg, _}} ->
+ ok;
+ Res ->
+ ct:fail("list_to_port/1 with incorrect arg succeeded.~n"
+ "Result: ~p", [Res])
+ end,
+ ok.
%% Test list_to_float/1 with correct and incorrect arguments.