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-rw-r--r--erts/emulator/beam/beam_emu.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index 68e6383f7f..234355de42 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -234,6 +234,12 @@ BeamInstr beam_return_trace[1]; /* OpCode(i_return_trace) */
BeamInstr beam_exception_trace[1]; /* UGLY also OpCode(i_return_trace) */
BeamInstr beam_return_time_trace[1]; /* OpCode(i_return_time_trace) */
+
+/*
+ * We should warn only once for tuple funs.
+ */
+static erts_smp_atomic_t warned_for_tuple_funs;
+
/*
* All Beam instructions in numerical order.
*/
@@ -1015,6 +1021,7 @@ init_emulator(void)
#if defined(VXWORKS)
init_done = 0;
#endif
+ erts_smp_atomic_init_nob(&warned_for_tuple_funs, (erts_aint_t) 0);
process_main();
}
@@ -6187,6 +6194,26 @@ call_fun(Process* p, /* Current process. */
if (!is_atom(module) || !is_atom(function)) {
goto badfun;
}
+
+ /*
+ * If this is the first time a tuple fun is used,
+ * send a warning to the logger.
+ */
+ if (erts_smp_atomic_xchg_nob(&warned_for_tuple_funs,
+ (erts_aint_t) 1) == 0) {
+ erts_dsprintf_buf_t* dsbufp;
+
+ dsbufp = erts_create_logger_dsbuf();
+ erts_dsprintf(dsbufp, "Call to tuple fun {%T,%T}.\n\n"
+ "Tuple funs are deprecated and will be removed "
+ "in R16. Use \"fun M:F/A\" instead, for example "
+ "\"fun %T:%T/%d\".\n\n"
+ "(This warning will only be shown the first time "
+ "a tuple fun is called.)\n",
+ module, function, module, function, arity);
+ erts_send_warning_to_logger(p->group_leader, dsbufp);
+ }
+
if ((ep = erts_find_export_entry(module, function, arity)) == NULL) {
ep = erts_find_export_entry(erts_proc_get_error_handler(p),
am_undefined_function, 3);