compiler, runtime: Check make int64 args for overflow.

From-SVN: r183994

2 files changed, 33 insertions, 6 deletions

diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index f906b22..395a375 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -7744,6 +7744,10 @@ Builtin_call_expression::lower_make()
       return Expression::make_error(this->location());
     }
 
+  bool have_big_args = false;
+  Type* uintptr_type = Type::lookup_integer_type("uintptr");
+  int uintptr_bits = uintptr_type->integer_type()->bits();
+
   ++parg;
   Expression* len_arg;
   if (parg == args->end())
@@ -7767,6 +7771,9 @@ Builtin_call_expression::lower_make()
 	  this->report_error(_("bad size for make"));
 	  return Expression::make_error(this->location());
 	}
+      if (len_arg->type()->integer_type() != NULL
+	  && len_arg->type()->integer_type()->bits() > uintptr_bits)
+	have_big_args = true;
       ++parg;
     }
 
@@ -7779,6 +7786,9 @@ Builtin_call_expression::lower_make()
 	  this->report_error(_("bad capacity when making slice"));
 	  return Expression::make_error(this->location());
 	}
+      if (cap_arg->type()->integer_type() != NULL
+	  && cap_arg->type()->integer_type()->bits() > uintptr_bits)
+	have_big_args = true;
       ++parg;
     }
 
@@ -7801,16 +7811,26 @@ Builtin_call_expression::lower_make()
   if (is_slice)
     {
       if (cap_arg == NULL)
-	call = Runtime::make_call(Runtime::MAKESLICE1, loc, 2, type_arg,
-				  len_arg);
+	call = Runtime::make_call((have_big_args
+				   ? Runtime::MAKESLICE1BIG
+				   : Runtime::MAKESLICE1),
+				  loc, 2, type_arg, len_arg);
       else
-	call = Runtime::make_call(Runtime::MAKESLICE2, loc, 3, type_arg,
-				  len_arg, cap_arg);
+	call = Runtime::make_call((have_big_args
+				   ? Runtime::MAKESLICE2BIG
+				   : Runtime::MAKESLICE2),
+				  loc, 3, type_arg, len_arg, cap_arg);
     }
   else if (is_map)
-    call = Runtime::make_call(Runtime::MAKEMAP, loc, 2, type_arg, len_arg);
+    call = Runtime::make_call((have_big_args
+			       ? Runtime::MAKEMAPBIG
+			       : Runtime::MAKEMAP),
+			      loc, 2, type_arg, len_arg);
   else if (is_chan)
-    call = Runtime::make_call(Runtime::MAKECHAN, loc, 2, type_arg, len_arg);
+    call = Runtime::make_call((have_big_args
+			       ? Runtime::MAKECHANBIG
+			       : Runtime::MAKECHAN),
+			      loc, 2, type_arg, len_arg);
   else
     go_unreachable();
 
diff --git a/gcc/go/gofrontend/runtime.def b/gcc/go/gofrontend/runtime.def
index 57d5090..7dda539 100644
--- a/gcc/go/gofrontend/runtime.def
+++ b/gcc/go/gofrontend/runtime.def
@@ -72,10 +72,16 @@ DEF_GO_RUNTIME(STRING_TO_INT_ARRAY, "__go_string_to_int_array",
 DEF_GO_RUNTIME(MAKESLICE1, "__go_make_slice1", P2(TYPE, UINTPTR), R1(SLICE))
 DEF_GO_RUNTIME(MAKESLICE2, "__go_make_slice2", P3(TYPE, UINTPTR, UINTPTR),
 	       R1(SLICE))
+DEF_GO_RUNTIME(MAKESLICE1BIG, "__go_make_slice1_big", P2(TYPE, UINT64),
+	       R1(SLICE))
+DEF_GO_RUNTIME(MAKESLICE2BIG, "__go_make_slice2_big", P3(TYPE, UINT64, UINT64),
+	       R1(SLICE))
 
 
 // Make a map.
 DEF_GO_RUNTIME(MAKEMAP, "__go_new_map", P2(MAPDESCRIPTOR, UINTPTR), R1(MAP))
+DEF_GO_RUNTIME(MAKEMAPBIG, "__go_new_map_big", P2(MAPDESCRIPTOR, UINT64),
+	       R1(MAP))
 
 // Build a map from a composite literal.
 DEF_GO_RUNTIME(CONSTRUCT_MAP, "__go_construct_map",
@@ -116,6 +122,7 @@ DEF_GO_RUNTIME(MAPITERNEXT, "runtime.mapiternext", P1(MAPITER), R0())
 
 // Make a channel.
 DEF_GO_RUNTIME(MAKECHAN, "__go_new_channel", P2(TYPE, UINTPTR), R1(CHAN))
+DEF_GO_RUNTIME(MAKECHANBIG, "__go_new_channel_big", P2(TYPE, UINT64), R1(CHAN))
 
 // Get the length of a channel (the number of unread values).
 DEF_GO_RUNTIME(CHAN_LEN, "__go_chan_len", P1(CHAN), R1(INT))