-5346c7d15362a16efa0defaaeca63b1fce1c1523
+14dc8052a09ad0a2226e64ab6b5af69c6923b830
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.
case Runtime::IFACEI2T2P:
case Runtime::IFACEE2T2:
case Runtime::IFACEI2T2:
- case Runtime::CONVERT_INTERFACE:
+ case Runtime::REQUIREITAB:
// All versions of interface conversion that might result
// from a type assertion. Some of these are the result of
// a tuple type assertion statement and may not be covered
case Runtime::CONCATSTRING5:
case Runtime::CONSTRUCT_MAP:
case Runtime::INTSTRING:
- case Runtime::CONVERT_INTERFACE:
+ case Runtime::REQUIREITAB:
// All runtime calls that involve allocation of memory
// except new. Runtime::NEW gets lowered into an
// allocation expression.
if (for_type_guard)
{
// A type assertion fails when converting a nil interface.
- first_field =
- Runtime::make_call(Runtime::ASSERT_INTERFACE, location, 2,
- lhs_type_expr, rhs_type_expr);
+ first_field = Runtime::make_call(Runtime::ASSERTITAB, location, 2,
+ lhs_type_expr, rhs_type_expr);
}
else if (lhs_is_empty)
{
{
// A conversion to a non-empty interface may fail, but unlike a
// type assertion converting nil will always succeed.
- first_field =
- Runtime::make_call(Runtime::CONVERT_INTERFACE, location, 2,
- lhs_type_expr, rhs_type_expr);
+ first_field = Runtime::make_call(Runtime::REQUIREITAB, location, 2,
+ lhs_type_expr, rhs_type_expr);
}
// The second field is simply the object pointer.
Expression* rhs_inter_expr = Expression::make_type_descriptor(rhs_type,
location);
- Expression* check_iface = Runtime::make_call(Runtime::CHECK_INTERFACE_TYPE,
+ Expression* check_iface = Runtime::make_call(Runtime::ASSERTI2T,
location, 3, lhs_type_expr,
rhs_descriptor, rhs_inter_expr);
&& !no->func_declaration_value()->asm_name().empty()
&& Linemap::is_predeclared_location(no->location()))
{
- var_name = no->func_declaration_value()->asm_name() + "_descriptor";
+ if (no->func_declaration_value()->asm_name().substr(0, 8) != "runtime.")
+ var_name = no->func_declaration_value()->asm_name() + "_descriptor";
+ else
+ var_name = no->func_declaration_value()->asm_name() + "$descriptor";
is_descriptor = true;
}
else
if (left_type->is_string_type() && right_type->is_string_type())
{
- left = Runtime::make_call(Runtime::STRCMP, location, 2,
- left, right);
- right = zexpr;
+ if (op == OPERATOR_EQEQ || op == OPERATOR_NOTEQ)
+ {
+ left = Runtime::make_call(Runtime::EQSTRING, location, 2,
+ left, right);
+ right = Expression::make_boolean(true, location);
+ }
+ else
+ {
+ left = Runtime::make_call(Runtime::CMPSTRING, location, 2,
+ left, right);
+ right = zexpr;
+ }
}
else if ((left_type->interface_type() != NULL
&& right_type->interface_type() == NULL
Expression::make_type_descriptor(right_type, location);
left =
Runtime::make_call((left_type->interface_type()->is_empty()
- ? Runtime::EMPTY_INTERFACE_VALUE_COMPARE
- : Runtime::INTERFACE_VALUE_COMPARE),
+ ? Runtime::EFACEVALEQ
+ : Runtime::IFACEVALEQ),
location, 3, left, descriptor,
pointer_arg);
- right = zexpr;
+ go_assert(op == OPERATOR_EQEQ || op == OPERATOR_NOTEQ);
+ right = Expression::make_boolean(true, location);
}
else if (left_type->interface_type() != NULL
&& right_type->interface_type() != NULL)
Runtime::Function compare_function;
if (left_type->interface_type()->is_empty()
&& right_type->interface_type()->is_empty())
- compare_function = Runtime::EMPTY_INTERFACE_COMPARE;
+ compare_function = Runtime::EFACEEQ;
else if (!left_type->interface_type()->is_empty()
&& !right_type->interface_type()->is_empty())
- compare_function = Runtime::INTERFACE_COMPARE;
+ compare_function = Runtime::IFACEEQ;
else
{
if (left_type->interface_type()->is_empty())
{
- go_assert(op == OPERATOR_EQEQ || op == OPERATOR_NOTEQ);
std::swap(left_type, right_type);
std::swap(left, right);
}
go_assert(!left_type->interface_type()->is_empty());
go_assert(right_type->interface_type()->is_empty());
- compare_function = Runtime::INTERFACE_EMPTY_COMPARE;
+ compare_function = Runtime::IFACEEFACEEQ;
}
left = Runtime::make_call(compare_function, location, 2, left, right);
- right = zexpr;
+ go_assert(op == OPERATOR_EQEQ || op == OPERATOR_NOTEQ);
+ right = Expression::make_boolean(true, location);
}
if (left_type->is_nil_type()
DEF_GO_RUNTIME(CONCATSTRING5, "runtime.concatstring5",
P2(POINTER, ARRAY5STRING), R1(STRING))
+// Compare two strings for equality.
+DEF_GO_RUNTIME(EQSTRING, "runtime.eqstring", P2(STRING, STRING), R1(BOOL))
+
// Compare two strings.
-DEF_GO_RUNTIME(STRCMP, "__go_strcmp", P2(STRING, STRING), R1(INT))
+DEF_GO_RUNTIME(CMPSTRING, "runtime.cmpstring", P2(STRING, STRING), R1(INT))
// Take a slice of a string.
DEF_GO_RUNTIME(STRING_SLICE, "__go_string_slice", P3(STRING, INT, INT),
DEF_GO_RUNTIME(IFACEI2T2, "runtime.ifaceI2T2", P3(TYPE, IFACE, POINTER),
R1(BOOL))
-// A type assertion from one interface type to another. This is
-// used for a type assertion.
-DEF_GO_RUNTIME(ASSERT_INTERFACE, "__go_assert_interface", P2(TYPE, TYPE), R1(POINTER))
-
-// Convert one interface type to another. This is used for an
-// assignment.
-DEF_GO_RUNTIME(CONVERT_INTERFACE, "__go_convert_interface", P2(TYPE, TYPE),
+// Return the interface method table for the second type converted to
+// the first type which is a (possibly empty) interface type. Panics
+// if the second type is nil (indicating a nil interface value) or if
+// the conversion is not possible. Used for type assertions. This is
+// like REQUIREITAB, but for type assertions.
+DEF_GO_RUNTIME(ASSERTITAB, "runtime.assertitab", P2(TYPE, TYPE), R1(POINTER))
+
+// Return the interface method table for the second type converted to
+// the first type, which is a non-empty interface type. Return nil if
+// the second type is nil, indicating a nil interface value. Panics
+// if the conversion is not possible. Used for assignments. This is
+// like ASSERTITAB, but for assignments.
+DEF_GO_RUNTIME(REQUIREITAB, "runtime.requireitab", P2(TYPE, TYPE),
R1(POINTER))
// Check whether an interface type may be converted to a
// non-interface type.
-DEF_GO_RUNTIME(CHECK_INTERFACE_TYPE, "__go_check_interface_type",
- P3(TYPE, TYPE, TYPE), R0())
+DEF_GO_RUNTIME(ASSERTI2T, "runtime.assertI2T", P3(TYPE, TYPE, TYPE), R0())
-// Return whether we can convert an interface type to a type.
-DEF_GO_RUNTIME(IFACEI2TP, "runtime.ifaceI2Tp", P2(TYPE, TYPE), R1(BOOL))
+// Return whether we can convert a type to an interface type.
+DEF_GO_RUNTIME(IFACET2IP, "runtime.ifaceT2Ip", P2(TYPE, TYPE), R1(BOOL))
// Get the type descriptor of an empty interface.
DEF_GO_RUNTIME(EFACETYPE, "runtime.efacetype", P1(EFACE), R1(TYPE))
DEF_GO_RUNTIME(IFACETYPEEQ, "runtime.ifacetypeeq", P2(TYPE, TYPE), R1(BOOL))
// Compare two empty interface values.
-DEF_GO_RUNTIME(EMPTY_INTERFACE_COMPARE, "__go_empty_interface_compare",
- P2(EFACE, EFACE), R1(INT))
+DEF_GO_RUNTIME(EFACEEQ, "runtime.efaceeq", P2(EFACE, EFACE), R1(BOOL))
// Compare an empty interface value to a non-interface value.
-DEF_GO_RUNTIME(EMPTY_INTERFACE_VALUE_COMPARE,
- "__go_empty_interface_value_compare",
- P3(EFACE, TYPE, POINTER), R1(INT))
+DEF_GO_RUNTIME(EFACEVALEQ, "runtime.efacevaleq", P3(EFACE, TYPE, POINTER),
+ R1(BOOL))
// Compare two non-empty interface values.
-DEF_GO_RUNTIME(INTERFACE_COMPARE, "__go_interface_compare",
- P2(IFACE, IFACE), R1(INT))
+DEF_GO_RUNTIME(IFACEEQ, "runtime.ifaceeq", P2(IFACE, IFACE), R1(BOOL))
// Compare a non-empty interface value to a non-interface value.
-DEF_GO_RUNTIME(INTERFACE_VALUE_COMPARE, "__go_interface_value_compare",
- P3(IFACE, TYPE, POINTER), R1(INT))
+DEF_GO_RUNTIME(IFACEVALEQ, "runtime.ifacevaleq", P3(IFACE, TYPE, POINTER),
+ R1(BOOL))
// Compare a non-empty interface value to an interface value.
-DEF_GO_RUNTIME(INTERFACE_EMPTY_COMPARE, "__go_interface_empty_compare",
- P2(IFACE, EFACE), R1(INT))
+DEF_GO_RUNTIME(IFACEEFACEEQ, "runtime.ifaceefaceeq", P2(IFACE, EFACE),
+ R1(BOOL))
// Lock the printer (for print/println).
else
cond = Runtime::make_call((type->interface_type() == NULL
? Runtime::IFACETYPEEQ
- : Runtime::IFACEI2TP),
+ : Runtime::IFACET2IP),
loc, 2,
Expression::make_type_descriptor(type, loc),
ref);
case Type::TYPE_INTERFACE:
if (this->interface_type()->is_empty())
{
- hash_fnname = "__go_type_hash_empty_interface";
- equal_fnname = "__go_type_equal_empty_interface";
+ hash_fnname = "runtime.nilinterhash";
+ equal_fnname = "runtime.nilinterequal";
}
else
{
- hash_fnname = "__go_type_hash_interface";
- equal_fnname = "__go_type_equal_interface";
+ hash_fnname = "runtime.interhash";
+ equal_fnname = "runtime.interequal";
}
break;
runtime_files = \
runtime/go-append.c \
runtime/go-assert.c \
- runtime/go-assert-interface.c \
runtime/go-breakpoint.c \
runtime/go-caller.c \
runtime/go-callers.c \
- runtime/go-can-convert-interface.c \
runtime/go-cdiv.c \
runtime/go-cgo.c \
- runtime/go-check-interface.c \
runtime/go-construct-map.c \
- runtime/go-convert-interface.c \
runtime/go-copy.c \
runtime/go-defer.c \
runtime/go-deferred-recover.c \
- runtime/go-eface-compare.c \
- runtime/go-eface-val-compare.c \
runtime/go-ffi.c \
runtime/go-fieldtrack.c \
- runtime/go-interface-compare.c \
- runtime/go-interface-eface-compare.c \
- runtime/go-interface-val-compare.c \
runtime/go-make-slice.c \
runtime/go-matherr.c \
runtime/go-memclr.c \
runtime/go-runtime-error.c \
runtime/go-setenv.c \
runtime/go-signal.c \
- runtime/go-strcmp.c \
runtime/go-strslice.c \
runtime/go-type-complex.c \
- runtime/go-type-eface.c \
runtime/go-type-float.c \
runtime/go-type-identity.c \
- runtime/go-type-interface.c \
runtime/go-type-string.c \
runtime/go-typedesc-equal.c \
runtime/go-unsafe-new.c \
$(runtime_thread_files) \
runtime/yield.c \
$(rtems_task_variable_add_file) \
- go-iface.c \
lfstack.c \
malloc.c \
- reflect.c \
runtime1.c \
sigqueue.c \
$(runtime_getncpu_file)
./goc2c $< > $@.tmp
mv -f $@.tmp $@
-reflect.c: $(srcdir)/runtime/reflect.goc goc2c
- ./goc2c $< > $@.tmp
- mv -f $@.tmp $@
-
runtime1.c: $(srcdir)/runtime/runtime1.goc goc2c
./goc2c $< > $@.tmp
mv -f $@.tmp $@
@LIBGO_IS_DARWIN_TRUE@@LIBGO_IS_LINUX_FALSE@am__objects_4 = \
@LIBGO_IS_DARWIN_TRUE@@LIBGO_IS_LINUX_FALSE@ getncpu-bsd.lo
@LIBGO_IS_LINUX_TRUE@am__objects_4 = getncpu-linux.lo
-am__objects_5 = go-append.lo go-assert.lo go-assert-interface.lo \
- go-breakpoint.lo go-caller.lo go-callers.lo \
- go-can-convert-interface.lo go-cdiv.lo go-cgo.lo \
- go-check-interface.lo go-construct-map.lo \
- go-convert-interface.lo go-copy.lo go-defer.lo \
- go-deferred-recover.lo go-eface-compare.lo \
- go-eface-val-compare.lo go-ffi.lo go-fieldtrack.lo \
- go-interface-compare.lo go-interface-eface-compare.lo \
- go-interface-val-compare.lo go-make-slice.lo go-matherr.lo \
- go-memclr.lo go-memcmp.lo go-memequal.lo go-memmove.lo \
- go-nanotime.lo go-now.lo go-new.lo go-nosys.lo go-panic.lo \
- go-recover.lo go-reflect-call.lo go-runtime-error.lo \
- go-setenv.lo go-signal.lo go-strcmp.lo go-strslice.lo \
- go-type-complex.lo go-type-eface.lo go-type-float.lo \
- go-type-identity.lo go-type-interface.lo go-type-string.lo \
+am__objects_5 = go-append.lo go-assert.lo go-breakpoint.lo \
+ go-caller.lo go-callers.lo go-cdiv.lo go-cgo.lo \
+ go-construct-map.lo go-copy.lo go-defer.lo \
+ go-deferred-recover.lo go-ffi.lo go-fieldtrack.lo \
+ go-make-slice.lo go-matherr.lo go-memclr.lo go-memcmp.lo \
+ go-memequal.lo go-memmove.lo go-nanotime.lo go-now.lo \
+ go-new.lo go-nosys.lo go-panic.lo go-recover.lo \
+ go-reflect-call.lo go-runtime-error.lo go-setenv.lo \
+ go-signal.lo go-strslice.lo go-type-complex.lo \
+ go-type-float.lo go-type-identity.lo go-type-string.lo \
go-typedesc-equal.lo go-unsafe-new.lo go-unsafe-newarray.lo \
go-unsafe-pointer.lo go-unsetenv.lo go-unwind.lo go-varargs.lo \
env_posix.lo heapdump.lo mcache.lo mcentral.lo \
$(am__objects_1) mfixalloc.lo mgc0.lo mheap.lo msize.lo \
panic.lo parfor.lo print.lo proc.lo runtime.lo signal_unix.lo \
thread.lo $(am__objects_2) yield.lo $(am__objects_3) \
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- sigqueue.lo $(am__objects_4)
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am_libgo_llgo_la_OBJECTS = $(am__objects_5)
libgo_llgo_la_OBJECTS = $(am_libgo_llgo_la_OBJECTS)
libgo_llgo_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
runtime_files = \
runtime/go-append.c \
runtime/go-assert.c \
- runtime/go-assert-interface.c \
runtime/go-breakpoint.c \
runtime/go-caller.c \
runtime/go-callers.c \
- runtime/go-can-convert-interface.c \
runtime/go-cdiv.c \
runtime/go-cgo.c \
- runtime/go-check-interface.c \
runtime/go-construct-map.c \
- runtime/go-convert-interface.c \
runtime/go-copy.c \
runtime/go-defer.c \
runtime/go-deferred-recover.c \
- runtime/go-eface-compare.c \
- runtime/go-eface-val-compare.c \
runtime/go-ffi.c \
runtime/go-fieldtrack.c \
- runtime/go-interface-compare.c \
- runtime/go-interface-eface-compare.c \
- runtime/go-interface-val-compare.c \
runtime/go-make-slice.c \
runtime/go-matherr.c \
runtime/go-memclr.c \
runtime/go-runtime-error.c \
runtime/go-setenv.c \
runtime/go-signal.c \
- runtime/go-strcmp.c \
runtime/go-strslice.c \
runtime/go-type-complex.c \
- runtime/go-type-eface.c \
runtime/go-type-float.c \
runtime/go-type-identity.c \
- runtime/go-type-interface.c \
runtime/go-type-string.c \
runtime/go-typedesc-equal.c \
runtime/go-unsafe-new.c \
$(runtime_thread_files) \
runtime/yield.c \
$(rtems_task_variable_add_file) \
- go-iface.c \
lfstack.c \
malloc.c \
- reflect.c \
runtime1.c \
sigqueue.c \
$(runtime_getncpu_file)
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@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/go-ffi.Plo@am__quote@
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--- /dev/null
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import (
+ "runtime/internal/sys"
+ "unsafe"
+)
+
+// For gccgo, use go:linkname to rename compiler-called functions to
+// themselves, so that the compiler will export them.
+//
+//go:linkname interhash runtime.interhash
+//go:linkname nilinterhash runtime.nilinterhash
+//go:linkname interequal runtime.interequal
+//go:linkname nilinterequal runtime.nilinterequal
+//go:linkname efaceeq runtime.efaceeq
+//go:linkname ifaceeq runtime.ifaceeq
+//go:linkname ifacevaleq runtime.ifacevaleq
+//go:linkname ifaceefaceeq runtime.ifaceefaceeq
+//go:linkname efacevaleq runtime.efacevaleq
+//go:linkname eqstring runtime.eqstring
+//go:linkname cmpstring runtime.cmpstring
+
+const (
+ c0 = uintptr((8-sys.PtrSize)/4*2860486313 + (sys.PtrSize-4)/4*33054211828000289)
+ c1 = uintptr((8-sys.PtrSize)/4*3267000013 + (sys.PtrSize-4)/4*23344194077549503)
+)
+
+func interhash(p unsafe.Pointer, h uintptr, size uintptr) uintptr {
+ a := (*iface)(p)
+ tab := a.tab
+ if tab == nil {
+ return h
+ }
+ t := *(**_type)(tab)
+ fn := t.hashfn
+ if fn == nil {
+ panic(errorString("hash of unhashable type " + *t.string))
+ }
+ if isDirectIface(t) {
+ return c1 * fn(unsafe.Pointer(&a.data), h^c0, t.size)
+ } else {
+ return c1 * fn(a.data, h^c0, t.size)
+ }
+}
+
+func nilinterhash(p unsafe.Pointer, h uintptr, size uintptr) uintptr {
+ a := (*eface)(p)
+ t := a._type
+ if t == nil {
+ return h
+ }
+ fn := t.hashfn
+ if fn == nil {
+ panic(errorString("hash of unhashable type " + *t.string))
+ }
+ if isDirectIface(t) {
+ return c1 * fn(unsafe.Pointer(&a.data), h^c0, t.size)
+ } else {
+ return c1 * fn(a.data, h^c0, t.size)
+ }
+}
+
+func interequal(p, q unsafe.Pointer, size uintptr) bool {
+ return ifaceeq(*(*iface)(p), *(*iface)(q))
+}
+
+func nilinterequal(p, q unsafe.Pointer, size uintptr) bool {
+ return efaceeq(*(*eface)(p), *(*eface)(q))
+}
+
+func efaceeq(x, y eface) bool {
+ t := x._type
+ if !eqtype(t, y._type) {
+ return false
+ }
+ if t == nil {
+ return true
+ }
+ eq := t.equalfn
+ if eq == nil {
+ panic(errorString("comparing uncomparable type " + *t.string))
+ }
+ if isDirectIface(t) {
+ return x.data == y.data
+ }
+ return eq(x.data, y.data, t.size)
+}
+
+func ifaceeq(x, y iface) bool {
+ xtab := x.tab
+ if xtab == nil && y.tab == nil {
+ return true
+ }
+ if xtab == nil || y.tab == nil {
+ return false
+ }
+ t := *(**_type)(xtab)
+ if !eqtype(t, *(**_type)(y.tab)) {
+ return false
+ }
+ eq := t.equalfn
+ if eq == nil {
+ panic(errorString("comparing uncomparable type " + *t.string))
+ }
+ if isDirectIface(t) {
+ return x.data == y.data
+ }
+ return eq(x.data, y.data, t.size)
+}
+
+func ifacevaleq(x iface, t *_type, p unsafe.Pointer) bool {
+ if x.tab == nil {
+ return false
+ }
+ xt := *(**_type)(x.tab)
+ if !eqtype(xt, t) {
+ return false
+ }
+ eq := t.equalfn
+ if eq == nil {
+ panic(errorString("comparing uncomparable type " + *t.string))
+ }
+ if isDirectIface(t) {
+ return x.data == p
+ }
+ return eq(x.data, p, t.size)
+}
+
+func ifaceefaceeq(x iface, y eface) bool {
+ if x.tab == nil && y._type == nil {
+ return true
+ }
+ if x.tab == nil || y._type == nil {
+ return false
+ }
+ xt := *(**_type)(x.tab)
+ if !eqtype(xt, y._type) {
+ return false
+ }
+ eq := xt.equalfn
+ if eq == nil {
+ panic(errorString("comparing uncomparable type " + *xt.string))
+ }
+ if isDirectIface(xt) {
+ return x.data == y.data
+ }
+ return eq(x.data, y.data, xt.size)
+}
+
+func efacevaleq(x eface, t *_type, p unsafe.Pointer) bool {
+ if x._type == nil {
+ return false
+ }
+ if !eqtype(x._type, t) {
+ return false
+ }
+ eq := t.equalfn
+ if eq == nil {
+ panic(errorString("comparing uncomparable type " + *t.string))
+ }
+ if isDirectIface(t) {
+ return x.data == p
+ }
+ return eq(x.data, p, t.size)
+}
+
+func eqstring(x, y string) bool {
+ a := stringStructOf(&x)
+ b := stringStructOf(&y)
+ if a.len != b.len {
+ return false
+ }
+ return memcmp(unsafe.Pointer(a.str), unsafe.Pointer(b.str), uintptr(a.len)) == 0
+}
+
+func cmpstring(x, y string) int {
+ a := stringStructOf(&x)
+ b := stringStructOf(&y)
+ l := a.len
+ if l > b.len {
+ l = b.len
+ }
+ i := memcmp(unsafe.Pointer(a.str), unsafe.Pointer(b.str), uintptr(l))
+ if i != 0 {
+ return int(i)
+ }
+ if a.len < b.len {
+ return -1
+ } else if a.len > b.len {
+ return 1
+ }
+ return 0
+}
+
+// Force the creation of function descriptors for equality and hash
+// functions. These will be referenced directly by the compiler.
+var _ = interhash
+var _ = interequal
+var _ = nilinterhash
+var _ = nilinterequal
--- /dev/null
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import (
+ "unsafe"
+)
+
+// For gccgo, use go:linkname to rename compiler-called functions to
+// themselves, so that the compiler will export them.
+//
+//go:linkname requireitab runtime.requireitab
+//go:linkname assertitab runtime.assertitab
+//go:linkname assertI2T runtime.assertI2T
+//go:linkname ifacetypeeq runtime.ifacetypeeq
+//go:linkname efacetype runtime.efacetype
+//go:linkname ifacetype runtime.ifacetype
+//go:linkname ifaceE2E2 runtime.ifaceE2E2
+//go:linkname ifaceI2E2 runtime.ifaceI2E2
+//go:linkname ifaceE2I2 runtime.ifaceE2I2
+//go:linkname ifaceI2I2 runtime.ifaceI2I2
+//go:linkname ifaceE2T2P runtime.ifaceE2T2P
+//go:linkname ifaceI2T2P runtime.ifaceI2T2P
+//go:linkname ifaceE2T2 runtime.ifaceE2T2
+//go:linkname ifaceI2T2 runtime.ifaceI2T2
+//go:linkname ifaceT2Ip runtime.ifaceT2Ip
+// Temporary for C code to call:
+//go:linkname getitab runtime.getitab
+
+// The gccgo itab structure is different than the gc one.
+//
+// Both gccgo and gc represent empty interfaces the same way:
+// a two field struct, where the first field points to a type descriptor
+// (a *_type) and the second field is the data pointer.
+//
+// Non-empty interfaces are also two-field structs, and the second
+// field is the data pointer. However, for gccgo, the first field, the
+// itab field, is different. The itab field points to the interface
+// method table, which is the implemention of a specific interface
+// type for a specific dynamic non-interface type. An interface
+// method table is a list of pointer values. The first pointer is the
+// type descriptor (a *_type) for the dynamic type. The subsequent
+// pointers are pointers to function code, which implement the methods
+// required by the interface. The pointers are sorted by name.
+//
+// The method pointers in the itab are C function pointers, not Go
+// function pointers; they may be called directly, and they have no
+// closures. The receiver is always passed as a pointer, and it is
+// always the same pointer stored in the interface value. A value
+// method starts by copying the receiver value out of the pointer into
+// a local variable.
+//
+// A method call on an interface value is by definition calling a
+// method at a known index m in the list of methods. Given a non-empty
+// interface value i, the call i.m(args) looks like
+// i.itab[m+1](i.iface, args)
+
+// Both an empty interface and a non-empty interface have a data
+// pointer field. The meaning of this field is determined by the
+// kindDirectIface bit in the `kind` field of the type descriptor of
+// the value stored in the interface. If kindDirectIface is set, then
+// the data pointer field in the interface value is exactly the value
+// stored in the interface. Otherwise, the data pointer field is a
+// pointer to memory that holds the value. It follows from this that
+// kindDirectIface can only be set for a type whose representation is
+// simply a pointer. In the current gccgo implementation, this is set
+// only for pointer types (including unsafe.Pointer). In the future it
+// could also be set for other types: channels, maps, functions,
+// single-field structs and single-element arrays whose single field
+// is simply a pointer.
+
+// For a nil interface value both fields in the interface struct are nil.
+
+// Return the interface method table for a value of type rhs converted
+// to an interface of type lhs.
+func getitab(lhs, rhs *_type, canfail bool) unsafe.Pointer {
+ if rhs == nil {
+ return nil
+ }
+
+ if lhs.kind&kindMask != kindInterface {
+ throw("getitab called for non-interface type")
+ }
+
+ lhsi := (*interfacetype)(unsafe.Pointer(lhs))
+
+ if len(lhsi.methods) == 0 {
+ throw("getitab called for empty interface type")
+ }
+
+ if rhs.uncommontype == nil || len(rhs.methods) == 0 {
+ if canfail {
+ return nil
+ }
+ panic(&TypeAssertionError{"", *rhs.string, *lhs.string, *lhsi.methods[0].name})
+ }
+
+ methods := make([]unsafe.Pointer, len(lhsi.methods)+1)
+ methods[0] = unsafe.Pointer(rhs)
+
+ ri := 0
+ for li := range lhsi.methods {
+ lhsMethod := &lhsi.methods[li]
+ var rhsMethod *method
+
+ for {
+ if ri >= len(rhs.methods) {
+ if canfail {
+ return nil
+ }
+ panic(&TypeAssertionError{"", *rhs.string, *lhs.string, *lhsMethod.name})
+ }
+
+ rhsMethod = &rhs.methods[ri]
+ if (lhsMethod.name == rhsMethod.name || *lhsMethod.name == *rhsMethod.name) &&
+ (lhsMethod.pkgPath == rhsMethod.pkgPath || *lhsMethod.pkgPath == *rhsMethod.pkgPath) {
+ break
+ }
+
+ ri++
+ }
+
+ if !eqtype(lhsMethod.typ, rhsMethod.mtyp) {
+ if canfail {
+ return nil
+ }
+ panic(&TypeAssertionError{"", *rhs.string, *lhs.string, *lhsMethod.name})
+ }
+
+ methods[li+1] = unsafe.Pointer(rhsMethod.tfn)
+ ri++
+ }
+
+ return unsafe.Pointer(&methods[0])
+}
+
+// Return the interface method table for a value of type rhs converted
+// to an interface of type lhs. Panics if the conversion is impossible.
+func requireitab(lhs, rhs *_type) unsafe.Pointer {
+ return getitab(lhs, rhs, false)
+}
+
+// Return the interface method table for a value of type rhs converted
+// to an interface of type lhs. Panics if the conversion is
+// impossible or if the rhs type is nil.
+func assertitab(lhs, rhs *_type) unsafe.Pointer {
+ if rhs == nil {
+ panic(&TypeAssertionError{"", "", *lhs.string, ""})
+ }
+
+ if lhs.kind&kindMask != kindInterface {
+ throw("assertitab called for non-interface type")
+ }
+
+ lhsi := (*interfacetype)(unsafe.Pointer(lhs))
+
+ if len(lhsi.methods) == 0 {
+ return unsafe.Pointer(rhs)
+ }
+
+ return getitab(lhs, rhs, false)
+}
+
+// Check whether an interface type may be converted to a non-interface
+// type, panicing if not.
+func assertI2T(lhs, rhs, inter *_type) {
+ if rhs == nil {
+ panic(&TypeAssertionError{"", "", *lhs.string, ""})
+ }
+ if !eqtype(lhs, rhs) {
+ panic(&TypeAssertionError{*inter.string, *rhs.string, *lhs.string, ""})
+ }
+}
+
+// Compare two type descriptors for equality.
+func ifacetypeeq(a, b *_type) bool {
+ return eqtype(a, b)
+}
+
+// Return the type descriptor of an empty interface.
+// FIXME: This should be inlined by the compiler.
+func efacetype(e eface) *_type {
+ return e._type
+}
+
+// Return the type descriptor of a non-empty interface.
+// FIXME: This should be inlined by the compiler.
+func ifacetype(i iface) *_type {
+ if i.tab == nil {
+ return nil
+ }
+ return *(**_type)(i.tab)
+}
+
+// Convert an empty interface to an empty interface, for a comma-ok
+// type assertion.
+func ifaceE2E2(e eface) (eface, bool) {
+ return e, e._type != nil
+}
+
+// Convert a non-empty interface to an empty interface, for a comma-ok
+// type assertion.
+func ifaceI2E2(i iface) (eface, bool) {
+ if i.tab == nil {
+ return eface{nil, nil}, false
+ } else {
+ return eface{*(**_type)(i.tab), i.data}, true
+ }
+}
+
+// Convert an empty interface to a non-empty interface, for a comma-ok
+// type assertion.
+func ifaceE2I2(inter *_type, e eface) (iface, bool) {
+ if e._type == nil {
+ return iface{nil, nil}, false
+ } else {
+ itab := getitab(inter, e._type, true)
+ if itab == nil {
+ return iface{nil, nil}, false
+ } else {
+ return iface{itab, e.data}, true
+ }
+ }
+}
+
+// Convert a non-empty interface to a non-empty interface, for a
+// comma-ok type assertion.
+func ifaceI2I2(inter *_type, i iface) (iface, bool) {
+ if i.tab == nil {
+ return iface{nil, nil}, false
+ } else {
+ itab := getitab(inter, *(**_type)(i.tab), true)
+ if itab == nil {
+ return iface{nil, nil}, false
+ } else {
+ return iface{itab, i.data}, true
+ }
+ }
+}
+
+// Convert an empty interface to a pointer non-interface type.
+func ifaceE2T2P(t *_type, e eface) (unsafe.Pointer, bool) {
+ if !eqtype(t, e._type) {
+ return nil, false
+ } else {
+ return e.data, true
+ }
+}
+
+// Convert a non-empty interface to a pointer non-interface type.
+func ifaceI2T2P(t *_type, i iface) (unsafe.Pointer, bool) {
+ if i.tab == nil || !eqtype(t, *(**_type)(i.tab)) {
+ return nil, false
+ } else {
+ return i.data, true
+ }
+}
+
+// Convert an empty interface to a non-pointer non-interface type.
+func ifaceE2T2(t *_type, e eface, ret unsafe.Pointer) bool {
+ if !eqtype(t, e._type) {
+ memclr(ret, t.size)
+ return false
+ } else {
+ typedmemmove(t, ret, e.data)
+ return true
+ }
+}
+
+// Convert a non-empty interface to a non-pointer non-interface type.
+func ifaceI2T2(t *_type, i iface, ret unsafe.Pointer) bool {
+ if i.tab == nil || !eqtype(t, *(**_type)(i.tab)) {
+ memclr(ret, t.size)
+ return false
+ } else {
+ typedmemmove(t, ret, i.data)
+ return true
+ }
+}
+
+// Return whether we can convert a type to an interface type.
+func ifaceT2Ip(to, from *_type) bool {
+ if from == nil {
+ return false
+ }
+
+ if to.kind&kindMask != kindInterface {
+ throw("ifaceT2Ip called with non-interface type")
+ }
+ toi := (*interfacetype)(unsafe.Pointer(to))
+
+ if from.uncommontype == nil || len(from.methods) == 0 {
+ return len(toi.methods) == 0
+ }
+
+ ri := 0
+ for li := range toi.methods {
+ toMethod := &toi.methods[li]
+ var fromMethod *method
+ for {
+ if ri >= len(from.methods) {
+ return false
+ }
+
+ fromMethod = &from.methods[ri]
+ if (toMethod.name == fromMethod.name || *toMethod.name == *fromMethod.name) &&
+ (toMethod.pkgPath == fromMethod.pkgPath || *toMethod.pkgPath == *fromMethod.pkgPath) {
+ break
+ }
+
+ ri++
+ }
+
+ if !eqtype(fromMethod.mtyp, toMethod.typ) {
+ return false
+ }
+
+ ri++
+ }
+
+ return true
+}
+
+//go:linkname reflect_ifaceE2I reflect.ifaceE2I
+func reflect_ifaceE2I(inter *interfacetype, e eface, dst *iface) {
+ t := e._type
+ if t == nil {
+ panic(TypeAssertionError{"", "", *inter.typ.string, ""})
+ }
+ dst.tab = requireitab((*_type)(unsafe.Pointer(inter)), t)
+ dst.data = e.data
+}
// variable-size, fn-specific data here
}
+// The representation of a non-empty interface.
+// See comment in iface.go for more details on this struct.
type iface struct {
tab unsafe.Pointer
data unsafe.Pointer
}
+// The representation of an empty interface.
+// See comment in iface.go for more details on this struct.
type eface struct {
_type *_type
data unsafe.Pointer
}
// memmove copies n bytes from "from" to "to".
-// in memmove_*.s
//go:noescape
func memmove(to, from unsafe.Pointer, n uintptr)
memmove(to, from, n)
}
+//go:noescape
+//extern __builtin_memcmp
+func memcmp(a, b unsafe.Pointer, size uintptr) int32
+
// exported value for testing
var hashLoad = loadFactor
func atomicstorep(ptr unsafe.Pointer, new unsafe.Pointer) {
atomic.StorepNoWB(noescape(ptr), new)
}
+
+// Temporary for gccgo until we port mbarrier.go
+func writebarrierptr(dst *uintptr, src uintptr) {
+ *dst = src
+}
ptrToThis *_type
}
+// Return whether two type descriptors are equal.
+// This is gccgo-specific, as gccgo, unlike gc, permits multiple
+// independent descriptors for a single type.
+func eqtype(t1, t2 *_type) bool {
+ switch {
+ case t1 == t2:
+ return true
+ case t1 == nil || t2 == nil:
+ return false
+ case t1.kind != t2.kind || t1.hash != t2.hash:
+ return false
+ default:
+ return *t1.string == *t2.string
+ }
+}
+
type method struct {
name *string
pkgPath *string
+++ /dev/null
-/* go-assert-interface.c -- interface type assertion for Go.
-
- Copyright 2010 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-alloc.h"
-#include "go-assert.h"
-#include "go-panic.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* This is called by the compiler to implement a type assertion from
- one interface type to another. This returns the value that should
- go in the first field of the result tuple. The result may be an
- empty or a non-empty interface. */
-
-const void *
-__go_assert_interface (const struct __go_type_descriptor *lhs_descriptor,
- const struct __go_type_descriptor *rhs_descriptor)
-{
- const struct __go_interface_type *lhs_interface;
-
- if (rhs_descriptor == NULL)
- {
- struct __go_empty_interface panic_arg;
-
- /* A type assertion is not permitted with a nil interface. */
-
- runtime_newTypeAssertionError (NULL, NULL, lhs_descriptor->__reflection,
- NULL, &panic_arg);
- __go_panic (panic_arg);
- }
-
- /* A type assertion to an empty interface just returns the object
- descriptor. */
-
- __go_assert ((lhs_descriptor->__code & GO_CODE_MASK) == GO_INTERFACE);
- lhs_interface = (const struct __go_interface_type *) lhs_descriptor;
- if (lhs_interface->__methods.__count == 0)
- return rhs_descriptor;
-
- return __go_convert_interface_2 (lhs_descriptor, rhs_descriptor, 0);
-}
+++ /dev/null
-/* go-can-convert-interface.c -- can we convert to an interface?
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-assert.h"
-#include "go-string.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Return whether we can convert from the type in FROM_DESCRIPTOR to
- the interface in TO_DESCRIPTOR. This is used for type
- switches. */
-
-_Bool
-__go_can_convert_to_interface (
- const struct __go_type_descriptor *to_descriptor,
- const struct __go_type_descriptor *from_descriptor)
-{
- const struct __go_interface_type *to_interface;
- int to_method_count;
- const struct __go_interface_method *to_method;
- const struct __go_uncommon_type *from_uncommon;
- int from_method_count;
- const struct __go_method *from_method;
- int i;
-
- /* In a type switch FROM_DESCRIPTOR can be NULL. */
- if (from_descriptor == NULL)
- return 0;
-
- __go_assert ((to_descriptor->__code & GO_CODE_MASK) == GO_INTERFACE);
- to_interface = (const struct __go_interface_type *) to_descriptor;
- to_method_count = to_interface->__methods.__count;
- to_method = ((const struct __go_interface_method *)
- to_interface->__methods.__values);
-
- from_uncommon = from_descriptor->__uncommon;
- if (from_uncommon == NULL)
- {
- from_method_count = 0;
- from_method = NULL;
- }
- else
- {
- from_method_count = from_uncommon->__methods.__count;
- from_method = ((const struct __go_method *)
- from_uncommon->__methods.__values);
- }
-
- for (i = 0; i < to_method_count; ++i)
- {
- while (from_method_count > 0
- && (!__go_ptr_strings_equal (from_method->__name,
- to_method->__name)
- || !__go_ptr_strings_equal (from_method->__pkg_path,
- to_method->__pkg_path)))
- {
- ++from_method;
- --from_method_count;
- }
-
- if (from_method_count == 0)
- return 0;
-
- if (!__go_type_descriptors_equal (from_method->__mtype,
- to_method->__type))
- return 0;
-
- ++to_method;
- ++from_method;
- --from_method_count;
- }
-
- return 1;
-}
#include "runtime.h"
#include "go-alloc.h"
-#include "interface.h"
#include "go-panic.h"
#include "go-type.h"
intgo len;
unsigned char *data;
String *ps;
- struct __go_empty_interface e;
+ Eface e;
+ const struct __go_type_descriptor *td;
runtime_exitsyscall (0);
len = __builtin_strlen (p);
ps = alloc_saved (sizeof *ps);
ps->str = data;
ps->len = len;
- e.__type_descriptor = &string_type_descriptor;
- e.__object = ps;
+ td = &string_type_descriptor;
+ memcpy(&e._type, &td, sizeof td); /* This is a const_cast. */
+ e.data = ps;
/* We don't call runtime_entersyscall here, because normally what
will happen is that we will walk up the stack to a Go deferred
+++ /dev/null
-/* go-check-interface.c -- check an interface type for a conversion
-
- Copyright 2010 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-panic.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Check that an interface type matches for a conversion to a
- non-interface type. This panics if the types are bad. The actual
- extraction of the object is inlined. */
-
-void
-__go_check_interface_type (
- const struct __go_type_descriptor *lhs_descriptor,
- const struct __go_type_descriptor *rhs_descriptor,
- const struct __go_type_descriptor *rhs_inter_descriptor)
-{
- if (rhs_descriptor == NULL)
- {
- struct __go_empty_interface panic_arg;
-
- runtime_newTypeAssertionError(NULL, NULL, lhs_descriptor->__reflection,
- NULL, &panic_arg);
- __go_panic(panic_arg);
- }
-
- if (lhs_descriptor != rhs_descriptor
- && !__go_type_descriptors_equal (lhs_descriptor, rhs_descriptor)
- && ((lhs_descriptor->__code & GO_CODE_MASK) != GO_UNSAFE_POINTER
- || !__go_is_pointer_type (rhs_descriptor))
- && ((rhs_descriptor->__code & GO_CODE_MASK) != GO_UNSAFE_POINTER
- || !__go_is_pointer_type (lhs_descriptor)))
- {
- struct __go_empty_interface panic_arg;
-
- runtime_newTypeAssertionError(rhs_inter_descriptor->__reflection,
- rhs_descriptor->__reflection,
- lhs_descriptor->__reflection,
- NULL, &panic_arg);
- __go_panic(panic_arg);
- }
-}
+++ /dev/null
-/* go-convert-interface.c -- convert interfaces for Go.
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-alloc.h"
-#include "go-assert.h"
-#include "go-panic.h"
-#include "go-string.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* This is called when converting one interface type into another
- interface type. LHS_DESCRIPTOR is the type descriptor of the
- resulting interface. RHS_DESCRIPTOR is the type descriptor of the
- object being converted. This builds and returns a new interface
- method table. If any method in the LHS_DESCRIPTOR interface is not
- implemented by the object, the conversion fails. If the conversion
- fails, then if MAY_FAIL is true this returns NULL; otherwise, it
- panics. */
-
-void *
-__go_convert_interface_2 (const struct __go_type_descriptor *lhs_descriptor,
- const struct __go_type_descriptor *rhs_descriptor,
- _Bool may_fail)
-{
- const struct __go_interface_type *lhs_interface;
- int lhs_method_count;
- const struct __go_interface_method* lhs_methods;
- const void **methods;
- const struct __go_uncommon_type *rhs_uncommon;
- int rhs_method_count;
- const struct __go_method *p_rhs_method;
- int i;
-
- if (rhs_descriptor == NULL)
- {
- /* A nil value always converts to nil. */
- return NULL;
- }
-
- __go_assert ((lhs_descriptor->__code & GO_CODE_MASK) == GO_INTERFACE);
- lhs_interface = (const struct __go_interface_type *) lhs_descriptor;
- lhs_method_count = lhs_interface->__methods.__count;
- lhs_methods = ((const struct __go_interface_method *)
- lhs_interface->__methods.__values);
-
- /* This should not be called for an empty interface. */
- __go_assert (lhs_method_count > 0);
-
- rhs_uncommon = rhs_descriptor->__uncommon;
- if (rhs_uncommon == NULL || rhs_uncommon->__methods.__count == 0)
- {
- struct __go_empty_interface panic_arg;
-
- if (may_fail)
- return NULL;
-
- runtime_newTypeAssertionError (NULL, rhs_descriptor->__reflection,
- lhs_descriptor->__reflection,
- lhs_methods[0].__name,
- &panic_arg);
- __go_panic (panic_arg);
- }
-
- rhs_method_count = rhs_uncommon->__methods.__count;
- p_rhs_method = ((const struct __go_method *)
- rhs_uncommon->__methods.__values);
-
- methods = NULL;
-
- for (i = 0; i < lhs_method_count; ++i)
- {
- const struct __go_interface_method *p_lhs_method;
-
- p_lhs_method = &lhs_methods[i];
-
- while (rhs_method_count > 0
- && (!__go_ptr_strings_equal (p_lhs_method->__name,
- p_rhs_method->__name)
- || !__go_ptr_strings_equal (p_lhs_method->__pkg_path,
- p_rhs_method->__pkg_path)))
- {
- ++p_rhs_method;
- --rhs_method_count;
- }
-
- if (rhs_method_count == 0
- || !__go_type_descriptors_equal (p_lhs_method->__type,
- p_rhs_method->__mtype))
- {
- struct __go_empty_interface panic_arg;
-
- if (methods != NULL)
- __go_free (methods);
-
- if (may_fail)
- return NULL;
-
- runtime_newTypeAssertionError (NULL, rhs_descriptor->__reflection,
- lhs_descriptor->__reflection,
- p_lhs_method->__name, &panic_arg);
- __go_panic (panic_arg);
- }
-
- if (methods == NULL)
- {
- methods = (const void **) __go_alloc ((lhs_method_count + 1)
- * sizeof (void *));
-
- /* The first field in the method table is always the type of
- the object. */
- methods[0] = rhs_descriptor;
- }
-
- methods[i + 1] = p_rhs_method->__function;
- }
-
- return methods;
-}
-
-/* This is called by the compiler to convert a value from one
- interface type to another. */
-
-void *
-__go_convert_interface (const struct __go_type_descriptor *lhs_descriptor,
- const struct __go_type_descriptor *rhs_descriptor)
-{
- return __go_convert_interface_2 (lhs_descriptor, rhs_descriptor, 0);
-}
because you are not permitted to take the address of a predeclared
function like recover. */
-struct __go_empty_interface
+Eface
__go_deferred_recover ()
{
G *g;
g = runtime_g ();
if (g->_defer == NULL || g->_defer->_panic != g->_panic)
{
- struct __go_empty_interface ret;
+ Eface ret;
- ret.__type_descriptor = NULL;
- ret.__object = NULL;
+ ret._type = NULL;
+ ret.data = NULL;
return ret;
}
return __go_recover ();
+++ /dev/null
-/* go-eface-compare.c -- compare two empty values.
-
- Copyright 2010 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Compare two interface values. Return 0 for equal, not zero for not
- equal (return value is like strcmp). */
-
-intgo
-__go_empty_interface_compare (struct __go_empty_interface left,
- struct __go_empty_interface right)
-{
- const struct __go_type_descriptor *left_descriptor;
-
- left_descriptor = left.__type_descriptor;
-
- if (left_descriptor == NULL && right.__type_descriptor == NULL)
- return 0;
- if (left_descriptor == NULL || right.__type_descriptor == NULL)
- return 1;
- if (!__go_type_descriptors_equal (left_descriptor,
- right.__type_descriptor))
- return 1;
- if (left_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (left_descriptor))
- return left.__object == right.__object ? 0 : 1;
- if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object,
- right.__object, left_descriptor->__size))
- return 1;
- return 0;
-}
+++ /dev/null
-/* go-eface-val-compare.c -- compare an empty interface with a value.
-
- Copyright 2010 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Compare an empty interface with a value. Return 0 for equal, not
- zero for not equal (return value is like strcmp). */
-
-intgo
-__go_empty_interface_value_compare (
- struct __go_empty_interface left,
- const struct __go_type_descriptor *right_descriptor,
- const void *val)
-{
- const struct __go_type_descriptor *left_descriptor;
-
- left_descriptor = left.__type_descriptor;
- if (left_descriptor == NULL)
- return 1;
- if (!__go_type_descriptors_equal (left_descriptor, right_descriptor))
- return 1;
- if (left_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (left_descriptor))
- return left.__object == val ? 0 : 1;
- if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object, val,
- left_descriptor->__size))
- return 1;
- return 0;
-}
+++ /dev/null
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package runtime
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-
-typedef struct __go_type_descriptor descriptor;
-typedef const struct __go_type_descriptor const_descriptor;
-typedef struct __go_interface interface;
-typedef struct __go_empty_interface empty_interface;
-
-// Compare two type descriptors.
-func ifacetypeeq(a *descriptor, b *descriptor) (eq bool) {
- eq = __go_type_descriptors_equal(a, b);
-}
-
-// Return the descriptor for an empty interface type.n
-func efacetype(e empty_interface) (d *const_descriptor) {
- return e.__type_descriptor;
-}
-
-// Return the descriptor for a non-empty interface type.
-func ifacetype(i interface) (d *const_descriptor) {
- if (i.__methods == nil) {
- return nil;
- }
- d = i.__methods[0];
-}
-
-// Convert an empty interface to an empty interface.
-func ifaceE2E2(e empty_interface) (ret empty_interface, ok bool) {
- ret = e;
- ok = ret.__type_descriptor != nil;
-}
-
-// Convert a non-empty interface to an empty interface.
-func ifaceI2E2(i interface) (ret empty_interface, ok bool) {
- if (i.__methods == nil) {
- ret.__type_descriptor = nil;
- ret.__object = nil;
- ok = 0;
- } else {
- ret.__type_descriptor = i.__methods[0];
- ret.__object = i.__object;
- ok = 1;
- }
-}
-
-// Convert an empty interface to a non-empty interface.
-func ifaceE2I2(inter *descriptor, e empty_interface) (ret interface, ok bool) {
- if (e.__type_descriptor == nil) {
- ret.__methods = nil;
- ret.__object = nil;
- ok = 0;
- } else {
- ret.__methods = __go_convert_interface_2(inter,
- e.__type_descriptor,
- 1);
- ret.__object = e.__object;
- ok = ret.__methods != nil;
- }
-}
-
-// Convert a non-empty interface to a non-empty interface.
-func ifaceI2I2(inter *descriptor, i interface) (ret interface, ok bool) {
- if (i.__methods == nil) {
- ret.__methods = nil;
- ret.__object = nil;
- ok = 0;
- } else {
- ret.__methods = __go_convert_interface_2(inter,
- i.__methods[0], 1);
- ret.__object = i.__object;
- ok = ret.__methods != nil;
- }
-}
-
-// Convert an empty interface to a pointer type.
-func ifaceE2T2P(inter *descriptor, e empty_interface) (ret *void, ok bool) {
- if (!__go_type_descriptors_equal(inter, e.__type_descriptor)) {
- ret = nil;
- ok = 0;
- } else {
- ret = e.__object;
- ok = 1;
- }
-}
-
-// Convert a non-empty interface to a pointer type.
-func ifaceI2T2P(inter *descriptor, i interface) (ret *void, ok bool) {
- if (i.__methods == nil
- || !__go_type_descriptors_equal(inter, i.__methods[0])) {
- ret = nil;
- ok = 0;
- } else {
- ret = i.__object;
- ok = 1;
- }
-}
-
-// Convert an empty interface to a non-pointer type.
-func ifaceE2T2(inter *descriptor, e empty_interface, ret *void) (ok bool) {
- if (!__go_type_descriptors_equal(inter, e.__type_descriptor)) {
- __builtin_memset(ret, 0, inter->__size);
- ok = 0;
- } else {
- __builtin_memcpy(ret, e.__object, inter->__size);
- ok = 1;
- }
-}
-
-// Convert a non-empty interface to a non-pointer type.
-func ifaceI2T2(inter *descriptor, i interface, ret *void) (ok bool) {
- if (i.__methods == nil
- || !__go_type_descriptors_equal(inter, i.__methods[0])) {
- __builtin_memset(ret, 0, inter->__size);
- ok = 0;
- } else {
- __builtin_memcpy(ret, i.__object, inter->__size);
- ok = 1;
- }
-}
-
-// Return whether we can convert an interface to a type.
-func ifaceI2Tp(to *descriptor, from *descriptor) (ok bool) {
- ok = __go_can_convert_to_interface(to, from);
-}
+++ /dev/null
-/* go-interface-compare.c -- compare two interface values.
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include <stddef.h>
-
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Compare two interface values. Return 0 for equal, not zero for not
- equal (return value is like strcmp). */
-
-int
-__go_interface_compare (struct __go_interface left,
- struct __go_interface right)
-{
- const struct __go_type_descriptor *left_descriptor;
-
- if (left.__methods == NULL && right.__methods == NULL)
- return 0;
- if (left.__methods == NULL || right.__methods == NULL)
- return 1;
- left_descriptor = left.__methods[0];
- if (!__go_type_descriptors_equal (left_descriptor, right.__methods[0]))
- return 1;
- if (left_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (left_descriptor))
- return left.__object == right.__object ? 0 : 1;
- if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object,
- right.__object, left_descriptor->__size))
- return 1;
- return 0;
-}
+++ /dev/null
-/* go-interface-eface-compare.c -- compare non-empty and empty interface.
-
- Copyright 2011 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Compare a non-empty interface value with an empty interface value.
- Return 0 for equal, not zero for not equal (return value is like
- strcmp). */
-
-intgo
-__go_interface_empty_compare (struct __go_interface left,
- struct __go_empty_interface right)
-{
- const struct __go_type_descriptor *left_descriptor;
-
- if (left.__methods == NULL && right.__type_descriptor == NULL)
- return 0;
- if (left.__methods == NULL || right.__type_descriptor == NULL)
- return 1;
- left_descriptor = left.__methods[0];
- if (!__go_type_descriptors_equal (left_descriptor, right.__type_descriptor))
- return 1;
- if (left_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (left_descriptor))
- return left.__object == right.__object ? 0 : 1;
- if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object,
- right.__object, left_descriptor->__size))
- return 1;
- return 0;
-}
+++ /dev/null
-/* go-interface-val-compare.c -- compare an interface to a value.
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-
-/* Compare two interface values. Return 0 for equal, not zero for not
- equal (return value is like strcmp). */
-
-intgo
-__go_interface_value_compare (
- struct __go_interface left,
- const struct __go_type_descriptor *right_descriptor,
- const void *val)
-{
- const struct __go_type_descriptor *left_descriptor;
-
- if (left.__methods == NULL)
- return 1;
- left_descriptor = left.__methods[0];
- if (!__go_type_descriptors_equal (left_descriptor, right_descriptor))
- return 1;
- if (left_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (left_descriptor))
- return left.__object == val ? 0 : 1;
- if (!__go_call_equalfn (left_descriptor->__equalfn, left.__object, val,
- left_descriptor->__size))
- return 1;
- return 0;
-}
#include "malloc.h"
#include "go-alloc.h"
#include "go-panic.h"
-#include "interface.h"
/* Print the panic stack. This is used when there is no recover. */
function. */
void
-__go_panic (struct __go_empty_interface arg)
+__go_panic (Eface arg)
{
G *g;
Panic *n;
#ifndef LIBGO_GO_PANIC_H
#define LIBGO_GO_PANIC_H
-#include "interface.h"
-
-struct String;
-struct __go_type_descriptor;
-
-extern void __go_panic (struct __go_empty_interface)
+extern void __go_panic (Eface)
__attribute__ ((noreturn));
-extern void __go_print_string (struct String);
+extern void __go_print_string (String);
-extern struct __go_empty_interface __go_recover (void);
+extern Eface __go_recover (void);
extern _Bool __go_can_recover (void *);
extern void __go_makefunc_can_recover (void *retaddr);
-struct location;
-extern void __go_makefunc_ffi_can_recover (struct location *, int);
+extern void __go_makefunc_ffi_can_recover (Location*, int);
extern void __go_makefunc_returning (void);
license that can be found in the LICENSE file. */
#include "runtime.h"
-#include "interface.h"
#include "go-panic.h"
/* If the top of the defer stack can be recovered, then return it.
make the same decision. */
void
-__go_makefunc_ffi_can_recover (struct location *loc, int n)
+__go_makefunc_ffi_can_recover (Location *loc, int n)
{
Defer *d;
const byte *name;
/* This is only called when it is valid for the caller to recover the
value on top of the panic stack, if there is one. */
-struct __go_empty_interface
+Eface
__go_recover ()
{
G *g;
if (g->_panic == NULL || g->_panic->recovered)
{
- struct __go_empty_interface ret;
+ Eface ret;
- ret.__type_descriptor = NULL;
- ret.__object = NULL;
+ ret._type = NULL;
+ ret.data = NULL;
return ret;
}
p = g->_panic;
+++ /dev/null
-/* go-strcmp.c -- the go string comparison function.
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-
-intgo
-__go_strcmp(String s1, String s2)
-{
- int i;
-
- i = __builtin_memcmp(s1.str, s2.str,
- (s1.len < s2.len ? s1.len : s2.len));
- if (i != 0)
- return i;
-
- if (s1.len < s2.len)
- return -1;
- else if (s1.len > s2.len)
- return 1;
- else
- return 0;
-}
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file. */
-#include "go-panic.h"
#include "runtime.h"
+#include "go-panic.h"
#include "arch.h"
#include "malloc.h"
+++ /dev/null
-/* go-type-eface.c -- hash and equality empty interface functions.
-
- Copyright 2010 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "interface.h"
-#include "go-type.h"
-
-/* A hash function for an empty interface. */
-
-uintptr_t
-__go_type_hash_empty_interface (const void *vval, uintptr_t seed,
- uintptr_t key_size __attribute__ ((unused)))
-{
- const struct __go_empty_interface *val;
- const struct __go_type_descriptor *descriptor;
- uintptr_t size;
-
- val = (const struct __go_empty_interface *) vval;
- descriptor = val->__type_descriptor;
- if (descriptor == NULL)
- return 0;
- if (descriptor->__hashfn == NULL)
- runtime_panicstring ("hash of unhashable type");
- size = descriptor->__size;
- if (__go_is_pointer_type (descriptor))
- return __go_call_hashfn (descriptor->__hashfn, &val->__object, seed, size);
- else
- return __go_call_hashfn (descriptor->__hashfn, val->__object, seed, size);
-}
-
-const FuncVal __go_type_hash_empty_interface_descriptor =
- { (void *) __go_type_hash_empty_interface };
-
-/* An equality function for an empty interface. */
-
-_Bool
-__go_type_equal_empty_interface (const void *vv1, const void *vv2,
- uintptr_t key_size __attribute__ ((unused)))
-{
- const struct __go_empty_interface *v1;
- const struct __go_empty_interface *v2;
- const struct __go_type_descriptor* v1_descriptor;
- const struct __go_type_descriptor* v2_descriptor;
-
- v1 = (const struct __go_empty_interface *) vv1;
- v2 = (const struct __go_empty_interface *) vv2;
- v1_descriptor = v1->__type_descriptor;
- v2_descriptor = v2->__type_descriptor;
- if (v1_descriptor == NULL || v2_descriptor == NULL)
- return v1_descriptor == v2_descriptor;
- if (!__go_type_descriptors_equal (v1_descriptor, v2_descriptor))
- return 0;
- if (v1_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (v1_descriptor))
- return v1->__object == v2->__object;
- else
- return __go_call_equalfn (v1_descriptor->__equalfn, v1->__object,
- v2->__object, v1_descriptor->__size);
-}
-
-const FuncVal __go_type_equal_empty_interface_descriptor =
- { (void *) __go_type_equal_empty_interface };
+++ /dev/null
-/* go-type-interface.c -- hash and equality interface functions.
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#include "runtime.h"
-#include "interface.h"
-#include "go-type.h"
-
-/* A hash function for an interface. */
-
-uintptr_t
-__go_type_hash_interface (const void *vval, uintptr_t seed,
- uintptr_t key_size __attribute__ ((unused)))
-{
- const struct __go_interface *val;
- const struct __go_type_descriptor *descriptor;
- uintptr_t size;
-
- val = (const struct __go_interface *) vval;
- if (val->__methods == NULL)
- return 0;
- descriptor = (const struct __go_type_descriptor *) val->__methods[0];
- if (descriptor->__hashfn == NULL)
- runtime_panicstring ("hash of unhashable type");
- size = descriptor->__size;
- if (__go_is_pointer_type (descriptor))
- return __go_call_hashfn (descriptor->__hashfn, &val->__object, seed, size);
- else
- return __go_call_hashfn (descriptor->__hashfn, val->__object, seed, size);
-}
-
-const FuncVal __go_type_hash_interface_descriptor =
- { (void *) __go_type_hash_interface };
-
-/* An equality function for an interface. */
-
-_Bool
-__go_type_equal_interface (const void *vv1, const void *vv2,
- uintptr_t key_size __attribute__ ((unused)))
-{
- const struct __go_interface *v1;
- const struct __go_interface *v2;
- const struct __go_type_descriptor* v1_descriptor;
- const struct __go_type_descriptor* v2_descriptor;
-
- v1 = (const struct __go_interface *) vv1;
- v2 = (const struct __go_interface *) vv2;
- if (v1->__methods == NULL || v2->__methods == NULL)
- return v1->__methods == v2->__methods;
- v1_descriptor = (const struct __go_type_descriptor *) v1->__methods[0];
- v2_descriptor = (const struct __go_type_descriptor *) v2->__methods[0];
- if (!__go_type_descriptors_equal (v1_descriptor, v2_descriptor))
- return 0;
- if (v1_descriptor->__equalfn == NULL)
- runtime_panicstring ("comparing uncomparable types");
- if (__go_is_pointer_type (v1_descriptor))
- return v1->__object == v2->__object;
- else
- return __go_call_equalfn (v1_descriptor->__equalfn, v1->__object,
- v2->__object, v1_descriptor->__size);
-}
-
-const FuncVal __go_type_equal_interface_descriptor =
- { (void *) __go_type_equal_interface };
#include "arch.h"
#include "malloc.h"
#include "go-type.h"
-#include "interface.h"
/* Implement unsafe_New, called from the reflect package. */
#include "arch.h"
#include "malloc.h"
#include "go-type.h"
-#include "interface.h"
/* Implement unsafe_NewArray, called from the reflect package. */
n = (Panic *) __go_alloc (sizeof (Panic));
- n->arg.__type_descriptor = NULL;
- n->arg.__object = NULL;
+ n->arg._type = NULL;
+ n->arg.data = NULL;
n->recovered = 0;
n->isforeign = 1;
n->next = g->_panic;
dumpint(TagPanic);
dumpint((uintptr)p);
dumpint((uintptr)gp);
- dumpint((uintptr)p->arg.__type_descriptor);
- dumpint((uintptr)p->arg.__object);
+ dumpint((uintptr)p->arg._type);
+ dumpint((uintptr)p->arg.data);
dumpint((uintptr)0);
dumpint((uintptr)p->next);
}
+++ /dev/null
-/* interface.h -- the interface type for Go.
-
- Copyright 2009 The Go Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file. */
-
-#ifndef LIBGO_INTERFACE_H
-#define LIBGO_INTERFACE_H
-
-struct __go_type_descriptor;
-
-/* A variable of interface type is an instance of this struct, if the
- interface has any methods. */
-
-struct __go_interface
-{
- /* A pointer to the interface method table. The first pointer is
- the type descriptor of the object. Subsequent pointers are
- pointers to functions. This is effectively the vtable for this
- interface. The function pointers are in the same order as the
- list in the internal representation of the interface, which sorts
- them by name. */
- const void **__methods;
-
- /* The object. If the object is a pointer--if the type descriptor
- code is GO_PTR or GO_UNSAFE_POINTER--then this field is the value
- of the object itself. Otherwise this is a pointer to memory
- which holds the value. */
- void *__object;
-};
-
-/* A variable of an empty interface type is an instance of this
- struct. */
-
-struct __go_empty_interface
-{
- /* The type descriptor of the object. */
- const struct __go_type_descriptor *__type_descriptor;
-
- /* The object. This is the same as __go_interface above. */
- void *__object;
-};
-
-extern void *
-__go_convert_interface (const struct __go_type_descriptor *,
- const struct __go_type_descriptor *);
-
-extern void *
-__go_convert_interface_2 (const struct __go_type_descriptor *,
- const struct __go_type_descriptor *,
- _Bool may_fail);
-
-extern _Bool
-__go_can_convert_to_interface(const struct __go_type_descriptor *,
- const struct __go_type_descriptor *);
-
-#endif /* !defined(LIBGO_INTERFACE_H) */
#include "runtime.h"
#include "arch.h"
#include "malloc.h"
-#include "interface.h"
#include "go-type.h"
// Map gccgo field names to gc field names.
-// Eface aka __go_empty_interface.
-#define type __type_descriptor
// Type aka __go_type_descriptor
#define kind __code
#define string __reflection
const Type *fint;
const PtrType *ot;
- if(obj.__type_descriptor == nil) {
+ if((Type*)obj._type == nil) {
runtime_printf("runtime.SetFinalizer: first argument is nil interface\n");
goto throw;
}
- if((obj.__type_descriptor->kind&kindMask) != GO_PTR) {
- runtime_printf("runtime.SetFinalizer: first argument is %S, not pointer\n", *obj.__type_descriptor->__reflection);
+ if((((Type*)obj._type)->kind&kindMask) != GO_PTR) {
+ runtime_printf("runtime.SetFinalizer: first argument is %S, not pointer\n", *((Type*)obj._type)->__reflection);
goto throw;
}
- ot = (const PtrType*)obj.type;
+ ot = (const PtrType*)obj._type;
// As an implementation detail we do not run finalizers for zero-sized objects,
// because we use &runtime_zerobase for all such allocations.
if(ot->__element_type != nil && ot->__element_type->__size == 0)
// runtime.SetFinalizer(Foo, nil)
// }
// See issue 7656.
- if((byte*)obj.__object < runtime_mheap.arena_start || runtime_mheap.arena_used <= (byte*)obj.__object)
+ if((byte*)obj.data < runtime_mheap.arena_start || runtime_mheap.arena_used <= (byte*)obj.data)
return;
- if(!runtime_mlookup(obj.__object, &base, &size, nil) || obj.__object != base) {
+ if(!runtime_mlookup(obj.data, &base, &size, nil) || obj.data != base) {
// As an implementation detail we allow to set finalizers for an inner byte
// of an object if it could come from tiny alloc (see mallocgc for details).
if(ot->__element_type == nil || (ot->__element_type->kind&kindNoPointers) == 0 || ot->__element_type->__size >= TinySize) {
- runtime_printf("runtime.SetFinalizer: pointer not at beginning of allocated block (%p)\n", obj.__object);
+ runtime_printf("runtime.SetFinalizer: pointer not at beginning of allocated block (%p)\n", obj.data);
goto throw;
}
}
- if(finalizer.__type_descriptor != nil) {
+ if((Type*)finalizer._type != nil) {
runtime_createfing();
- if((finalizer.__type_descriptor->kind&kindMask) != GO_FUNC)
+ if((((Type*)finalizer._type)->kind&kindMask) != GO_FUNC)
goto badfunc;
- ft = (const FuncType*)finalizer.__type_descriptor;
+ ft = (const FuncType*)finalizer._type;
if(ft->__dotdotdot || ft->__in.__count != 1)
goto badfunc;
fint = *(Type**)ft->__in.__values;
- if(__go_type_descriptors_equal(fint, obj.__type_descriptor)) {
+ if(__go_type_descriptors_equal(fint, (Type*)obj._type)) {
// ok - same type
- } else if((fint->kind&kindMask) == GO_PTR && (fint->__uncommon == nil || fint->__uncommon->__name == nil || obj.type->__uncommon == nil || obj.type->__uncommon->__name == nil) && __go_type_descriptors_equal(((const PtrType*)fint)->__element_type, ((const PtrType*)obj.type)->__element_type)) {
+ } else if((fint->kind&kindMask) == GO_PTR && (fint->__uncommon == nil || fint->__uncommon->__name == nil || ((Type*)obj._type)->__uncommon == nil || ((Type*)obj._type)->__uncommon->__name == nil) && __go_type_descriptors_equal(((const PtrType*)fint)->__element_type, ((const PtrType*)obj._type)->__element_type)) {
// ok - not same type, but both pointers,
// one or the other is unnamed, and same element type, so assignable.
} else if((fint->kind&kindMask) == GO_INTERFACE && ((const InterfaceType*)fint)->__methods.__count == 0) {
// ok - satisfies empty interface
- } else if((fint->kind&kindMask) == GO_INTERFACE && __go_convert_interface_2(fint, obj.__type_descriptor, 1) != nil) {
+ } else if((fint->kind&kindMask) == GO_INTERFACE && getitab(fint, (Type*)obj._type, true) != nil) {
// ok - satisfies non-empty interface
} else
goto badfunc;
- ot = (const PtrType*)obj.__type_descriptor;
- if(!runtime_addfinalizer(obj.__object, *(FuncVal**)finalizer.__object, ft, ot)) {
+ ot = (const PtrType*)obj._type;
+ if(!runtime_addfinalizer(obj.data, *(FuncVal**)finalizer.data, ft, ot)) {
runtime_printf("runtime.SetFinalizer: finalizer already set\n");
goto throw;
}
} else {
// NOTE: asking to remove a finalizer when there currently isn't one set is OK.
- runtime_removefinalizer(obj.__object);
+ runtime_removefinalizer(obj.data);
}
return;
badfunc:
- runtime_printf("runtime.SetFinalizer: cannot pass %S to finalizer %S\n", *obj.__type_descriptor->__reflection, *finalizer.__type_descriptor->__reflection);
+ runtime_printf("runtime.SetFinalizer: cannot pass %S to finalizer %S\n", *((Type*)obj._type)->__reflection, *((Type*)finalizer._type)->__reflection);
throw:
runtime_throw("runtime.SetFinalizer");
}
// Slice aka __go_open_array.
#define array __values
#define cap __capacity
-// Iface aka __go_interface
-#define tab __methods
// Hmap aka __go_map
typedef struct __go_map Hmap;
// Type aka __go_type_descriptor
eface = (Eface*)(stack_top.b + pc[1]);
pc += 2;
if(Debug > 2)
- runtime_printf("gc_eface @%p: %p %p\n", stack_top.b+pc[1], eface->__type_descriptor, eface->__object);
- if(eface->__type_descriptor == nil)
+ runtime_printf("gc_eface @%p: %p %p\n", stack_top.b+pc[1], eface->_type, eface->data);
+ if(eface->_type == nil)
continue;
// eface->type
- t = eface->__type_descriptor;
+ t = eface->_type;
if((const byte*)t >= arena_start && (const byte*)t < arena_used) {
union { const Type *tc; Type *tr; } u;
u.tc = t;
flushptrbuf(&sbuf);
}
- // eface->__object
- if((byte*)eface->__object >= arena_start && (byte*)eface->__object < arena_used) {
+ // eface->data
+ if((byte*)eface->data >= arena_start && (byte*)eface->data < arena_used) {
if(__go_is_pointer_type(t)) {
if((t->__code & kindNoPointers))
continue;
- obj = eface->__object;
+ obj = eface->data;
if((t->__code & kindMask) == kindPtr) {
// Only use type information if it is a pointer-containing type.
// This matches the GC programs written by cmd/gc/reflect.c's
objti = (uintptr)((const PtrType*)t)->elem->__gc;
}
} else {
- obj = eface->__object;
+ obj = eface->data;
objti = (uintptr)t->__gc;
}
}
iface = (Iface*)(stack_top.b + pc[1]);
pc += 2;
if(Debug > 2)
- runtime_printf("gc_iface @%p: %p/%p %p\n", stack_top.b+pc[1], iface->__methods[0], nil, iface->__object);
+ runtime_printf("gc_iface @%p: %p/%p %p\n", stack_top.b+pc[1], *(Type**)iface->tab, nil, iface->data);
if(iface->tab == nil)
continue;
}
// iface->data
- if((byte*)iface->__object >= arena_start && (byte*)iface->__object < arena_used) {
- t = (const Type*)iface->tab[0];
+ if((byte*)iface->data >= arena_start && (byte*)iface->data < arena_used) {
+ t = *(Type**)iface->tab;
if(__go_is_pointer_type(t)) {
if((t->__code & kindNoPointers))
continue;
- obj = iface->__object;
+ obj = iface->data;
if((t->__code & kindMask) == kindPtr) {
// Only use type information if it is a pointer-containing type.
// This matches the GC programs written by cmd/gc/reflect.c's
objti = (uintptr)((const PtrType*)t)->elem->__gc;
}
} else {
- obj = iface->__object;
+ obj = iface->data;
objti = (uintptr)t->__gc;
}
}
fb = nil;
next = nil;
i = 0;
- ef.__type_descriptor = nil;
- ef.__object = nil;
+ ef._type = nil;
+ ef.data = nil;
// force flush to memory
USED(&f);
param = &f->arg;
} else if(((const InterfaceType*)fint)->__methods.__count == 0) {
// convert to empty interface
- ef.__type_descriptor = (const Type*)f->ot;
- ef.__object = f->arg;
+ // using memcpy as const_cast.
+ memcpy(&ef._type, &f->ot,
+ sizeof ef._type);
+ ef.data = f->arg;
param = &ef;
} else {
// convert to interface with methods
- iface.__methods = __go_convert_interface_2((const Type*)fint,
- (const Type*)f->ot,
- 1);
- iface.__object = f->arg;
- if(iface.__methods == nil)
+ iface.tab = getitab(fint,
+ (const Type*)f->ot,
+ true);
+ iface.data = f->arg;
+ if(iface.data == nil)
runtime_throw("invalid type conversion in runfinq");
param = &iface;
}
fb = nil;
next = nil;
i = 0;
- ef.__type_descriptor = nil;
- ef.__object = nil;
+ ef._type = nil;
+ ef.data = nil;
runtime_gc(1); // trigger another gc to clean up the finalized objects, if possible
}
}
+++ /dev/null
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package reflect
-#include "runtime.h"
-#include "go-type.h"
-#include "interface.h"
-#include "go-panic.h"
-
-func ifaceE2I(inter *Type, e Eface, ret *Iface) {
- const Type *t;
- Eface err;
-
- t = e.__type_descriptor;
- if(t == nil) {
- // explicit conversions require non-nil interface value.
- runtime_newTypeAssertionError(
- nil, nil, inter->__reflection,
- nil, &err);
- runtime_panic(err);
- }
- ret->__object = e.__object;
- ret->__methods = __go_convert_interface(inter, t);
-}
#include <sys/mman.h>
#endif
-#include "interface.h"
#include "go-alloc.h"
#define _STRINGIFY2_(x) #x
typedef struct sudog SudoG;
typedef struct __go_open_array Slice;
-typedef struct __go_interface Iface;
-typedef struct __go_empty_interface Eface;
+typedef struct iface Iface;
+typedef struct eface Eface;
typedef struct __go_type_descriptor Type;
typedef struct _defer Defer;
typedef struct _panic Panic;
};
#include "array.h"
-#include "interface.h"
// Rename Go types generated by mkrsysinfo.sh from C types, to avoid
// the name conflict.
extern _Bool runtime_cgoHasExtraM;
extern Hchan *runtime_main_init_done;
extern uintptr __go_end __attribute__ ((weak));
+extern void *getitab(const struct __go_type_descriptor *,
+ const struct __go_type_descriptor *,
+ _Bool)
+ __asm__ (GOSYM_PREFIX "runtime.getitab");
}
func typestring(e Eface) (s String) {
- s = *e.__type_descriptor->__reflection;
+ s = *((Type*)e._type)->__reflection;
}
func golockedOSThread() (ret bool) {
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