mirror of
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2887ef499a
The internal ABI spec was recently updated to include specific language covering "past-the-end" pointers and structs containing trailing zero-sized fields. Add a unit test that makes sure we do the right thing in this case. Fix a couple comments in other unit tests. Change-Id: I18d373d11e122aec74b316837843887272676c63 Reviewed-on: https://go-review.googlesource.com/c/go/+/303809 Trust: Than McIntosh <thanm@google.com> Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
361 lines
13 KiB
Go
361 lines
13 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package test
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import (
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"bufio"
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"cmd/compile/internal/abi"
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"cmd/compile/internal/base"
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"cmd/compile/internal/ssagen"
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"cmd/compile/internal/typecheck"
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"cmd/compile/internal/types"
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"cmd/internal/obj"
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"cmd/internal/obj/x86"
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"cmd/internal/src"
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"os"
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"testing"
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)
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// AMD64 registers available:
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// - integer: RAX, RBX, RCX, RDI, RSI, R8, R9, r10, R11
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// - floating point: X0 - X14
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var configAMD64 = abi.NewABIConfig(9, 15, 0)
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func TestMain(m *testing.M) {
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ssagen.Arch.LinkArch = &x86.Linkamd64
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ssagen.Arch.REGSP = x86.REGSP
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ssagen.Arch.MAXWIDTH = 1 << 50
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types.MaxWidth = ssagen.Arch.MAXWIDTH
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base.Ctxt = obj.Linknew(ssagen.Arch.LinkArch)
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base.Ctxt.DiagFunc = base.Errorf
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base.Ctxt.DiagFlush = base.FlushErrors
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base.Ctxt.Bso = bufio.NewWriter(os.Stdout)
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types.PtrSize = ssagen.Arch.LinkArch.PtrSize
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types.RegSize = ssagen.Arch.LinkArch.RegSize
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typecheck.InitUniverse()
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os.Exit(m.Run())
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}
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func TestABIUtilsBasic1(t *testing.T) {
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// func(x int32) int32
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i32 := types.Types[types.TINT32]
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ft := mkFuncType(nil, []*types.Type{i32}, []*types.Type{i32})
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// expected results
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exp := makeExpectedDump(`
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IN 0: R{ I0 } spilloffset: 0 typ: int32
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OUT 0: R{ I0 } spilloffset: -1 typ: int32
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offsetToSpillArea: 0 spillAreaSize: 8
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`)
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abitest(t, ft, exp)
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}
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func TestABIUtilsBasic2(t *testing.T) {
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// func(p1 int8, p2 int16, p3 int32, p4 int64,
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// p5 float32, p6 float32, p7 float64, p8 float64,
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// p9 int8, p10 int16, p11 int32, p12 int64,
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// p13 float32, p14 float32, p15 float64, p16 float64,
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// p17 complex128, p18 complex128, p19 complex12, p20 complex128,
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// p21 complex64, p22 int8, p23 in16, p24 int32, p25 int64,
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// p26 int8, p27 in16, p28 int32, p29 int64)
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// (r1 int32, r2 float64, r3 float64) {
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i8 := types.Types[types.TINT8]
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i16 := types.Types[types.TINT16]
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i32 := types.Types[types.TINT32]
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i64 := types.Types[types.TINT64]
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f32 := types.Types[types.TFLOAT32]
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f64 := types.Types[types.TFLOAT64]
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c64 := types.Types[types.TCOMPLEX64]
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c128 := types.Types[types.TCOMPLEX128]
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ft := mkFuncType(nil,
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[]*types.Type{
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i8, i16, i32, i64,
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f32, f32, f64, f64,
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i8, i16, i32, i64,
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f32, f32, f64, f64,
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c128, c128, c128, c128, c64,
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i8, i16, i32, i64,
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i8, i16, i32, i64},
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[]*types.Type{i32, f64, f64})
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exp := makeExpectedDump(`
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IN 0: R{ I0 } spilloffset: 0 typ: int8
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IN 1: R{ I1 } spilloffset: 2 typ: int16
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IN 2: R{ I2 } spilloffset: 4 typ: int32
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IN 3: R{ I3 } spilloffset: 8 typ: int64
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IN 4: R{ F0 } spilloffset: 16 typ: float32
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IN 5: R{ F1 } spilloffset: 20 typ: float32
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IN 6: R{ F2 } spilloffset: 24 typ: float64
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IN 7: R{ F3 } spilloffset: 32 typ: float64
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IN 8: R{ I4 } spilloffset: 40 typ: int8
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IN 9: R{ I5 } spilloffset: 42 typ: int16
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IN 10: R{ I6 } spilloffset: 44 typ: int32
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IN 11: R{ I7 } spilloffset: 48 typ: int64
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IN 12: R{ F4 } spilloffset: 56 typ: float32
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IN 13: R{ F5 } spilloffset: 60 typ: float32
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IN 14: R{ F6 } spilloffset: 64 typ: float64
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IN 15: R{ F7 } spilloffset: 72 typ: float64
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IN 16: R{ F8 F9 } spilloffset: 80 typ: complex128
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IN 17: R{ F10 F11 } spilloffset: 96 typ: complex128
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IN 18: R{ F12 F13 } spilloffset: 112 typ: complex128
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IN 19: R{ } offset: 0 typ: complex128
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IN 20: R{ } offset: 16 typ: complex64
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IN 21: R{ I8 } spilloffset: 128 typ: int8
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IN 22: R{ } offset: 24 typ: int16
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IN 23: R{ } offset: 28 typ: int32
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IN 24: R{ } offset: 32 typ: int64
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IN 25: R{ } offset: 40 typ: int8
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IN 26: R{ } offset: 42 typ: int16
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IN 27: R{ } offset: 44 typ: int32
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IN 28: R{ } offset: 48 typ: int64
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OUT 0: R{ I0 } spilloffset: -1 typ: int32
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OUT 1: R{ F0 } spilloffset: -1 typ: float64
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OUT 2: R{ F1 } spilloffset: -1 typ: float64
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offsetToSpillArea: 56 spillAreaSize: 136
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`)
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abitest(t, ft, exp)
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}
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func TestABIUtilsArrays(t *testing.T) {
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// func(p1 [1]int32, p2 [0]int32, p3 [1][1]int32, p4 [2]int32)
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// (r1 [2]int32, r2 [1]int32, r3 [0]int32, r4 [1][1]int32) {
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i32 := types.Types[types.TINT32]
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ae := types.NewArray(i32, 0)
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a1 := types.NewArray(i32, 1)
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a2 := types.NewArray(i32, 2)
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aa1 := types.NewArray(a1, 1)
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ft := mkFuncType(nil, []*types.Type{a1, ae, aa1, a2},
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[]*types.Type{a2, a1, ae, aa1})
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exp := makeExpectedDump(`
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IN 0: R{ I0 } spilloffset: 0 typ: [1]int32
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IN 1: R{ } offset: 0 typ: [0]int32
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IN 2: R{ I1 } spilloffset: 4 typ: [1][1]int32
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IN 3: R{ } offset: 0 typ: [2]int32
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OUT 0: R{ } offset: 8 typ: [2]int32
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OUT 1: R{ I0 } spilloffset: -1 typ: [1]int32
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OUT 2: R{ } offset: 16 typ: [0]int32
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OUT 3: R{ I1 } spilloffset: -1 typ: [1][1]int32
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offsetToSpillArea: 16 spillAreaSize: 8
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`)
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abitest(t, ft, exp)
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}
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func TestABIUtilsStruct1(t *testing.T) {
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// type s struct { f1 int8; f2 int8; f3 struct {}; f4 int8; f5 int16) }
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// func(p1 int6, p2 s, p3 int64)
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// (r1 s, r2 int8, r3 int32) {
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i8 := types.Types[types.TINT8]
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i16 := types.Types[types.TINT16]
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i32 := types.Types[types.TINT32]
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i64 := types.Types[types.TINT64]
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s := mkstruct([]*types.Type{i8, i8, mkstruct([]*types.Type{}), i8, i16})
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ft := mkFuncType(nil, []*types.Type{i8, s, i64},
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[]*types.Type{s, i8, i32})
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exp := makeExpectedDump(`
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IN 0: R{ I0 } spilloffset: 0 typ: int8
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IN 1: R{ I1 I2 I3 I4 } spilloffset: 2 typ: struct { int8; int8; struct {}; int8; int16 }
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IN 2: R{ I5 } spilloffset: 8 typ: int64
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OUT 0: R{ I0 I1 I2 I3 } spilloffset: -1 typ: struct { int8; int8; struct {}; int8; int16 }
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OUT 1: R{ I4 } spilloffset: -1 typ: int8
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OUT 2: R{ I5 } spilloffset: -1 typ: int32
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offsetToSpillArea: 0 spillAreaSize: 16
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`)
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abitest(t, ft, exp)
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}
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func TestABIUtilsStruct2(t *testing.T) {
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// type s struct { f1 int64; f2 struct { } }
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// type fs struct { f1 float64; f2 s; f3 struct { } }
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// func(p1 s, p2 s, p3 fs)
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// (r1 fs, r2 fs)
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f64 := types.Types[types.TFLOAT64]
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i64 := types.Types[types.TINT64]
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s := mkstruct([]*types.Type{i64, mkstruct([]*types.Type{})})
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fs := mkstruct([]*types.Type{f64, s, mkstruct([]*types.Type{})})
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ft := mkFuncType(nil, []*types.Type{s, s, fs},
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[]*types.Type{fs, fs})
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exp := makeExpectedDump(`
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IN 0: R{ I0 } spilloffset: 0 typ: struct { int64; struct {} }
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IN 1: R{ I1 } spilloffset: 16 typ: struct { int64; struct {} }
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IN 2: R{ F0 I2 } spilloffset: 32 typ: struct { float64; struct { int64; struct {} }; struct {} }
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OUT 0: R{ F0 I0 } spilloffset: -1 typ: struct { float64; struct { int64; struct {} }; struct {} }
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OUT 1: R{ F1 I1 } spilloffset: -1 typ: struct { float64; struct { int64; struct {} }; struct {} }
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offsetToSpillArea: 0 spillAreaSize: 64
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`)
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abitest(t, ft, exp)
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}
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// TestABIUtilsEmptyFieldAtEndOfStruct is testing to make sure
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// the abi code is doing the right thing for struct types that have
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// a trailing zero-sized field (where the we need to add padding).
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func TestABIUtilsEmptyFieldAtEndOfStruct(t *testing.T) {
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// type s struct { f1 [2]int64; f2 struct { } }
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// type s2 struct { f1 [3]int16; f2 struct { } }
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// type fs struct { f1 float64; f s; f3 struct { } }
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// func(p1 s, p2 s, p3 fs) (r1 fs, r2 fs)
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f64 := types.Types[types.TFLOAT64]
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i64 := types.Types[types.TINT64]
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i16 := types.Types[types.TINT16]
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tb := types.Types[types.TBOOL]
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ab2 := types.NewArray(tb, 2)
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a2 := types.NewArray(i64, 2)
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a3 := types.NewArray(i16, 3)
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s := mkstruct([]*types.Type{a2, mkstruct([]*types.Type{})})
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s2 := mkstruct([]*types.Type{a3, mkstruct([]*types.Type{})})
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fs := mkstruct([]*types.Type{f64, s, mkstruct([]*types.Type{})})
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ft := mkFuncType(nil, []*types.Type{s, ab2, s2, fs, fs},
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[]*types.Type{fs, ab2, fs})
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exp := makeExpectedDump(`
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IN 0: R{ } offset: 0 typ: struct { [2]int64; struct {} }
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IN 1: R{ } offset: 24 typ: [2]bool
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IN 2: R{ } offset: 26 typ: struct { [3]int16; struct {} }
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IN 3: R{ } offset: 40 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
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IN 4: R{ } offset: 80 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
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OUT 0: R{ } offset: 120 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
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OUT 1: R{ } offset: 160 typ: [2]bool
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OUT 2: R{ } offset: 168 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
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offsetToSpillArea: 208 spillAreaSize: 0
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`)
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abitest(t, ft, exp)
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// Check to make sure that NumParamRegs yields 2 and not 3
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// for struct "s" (e.g. that it handles the padding properly).
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nps := configAMD64.NumParamRegs(s)
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if nps != 2 {
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t.Errorf("NumParams(%v) returned %d expected %d\n",
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s, nps, 2)
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}
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}
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func TestABIUtilsSliceString(t *testing.T) {
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// func(p1 []int32, p2 int8, p3 []int32, p4 int8, p5 string,
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// p6 int64, p6 []intr32) (r1 string, r2 int64, r3 string, r4 []int32)
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i32 := types.Types[types.TINT32]
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sli32 := types.NewSlice(i32)
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str := types.New(types.TSTRING)
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i8 := types.Types[types.TINT8]
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i64 := types.Types[types.TINT64]
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ft := mkFuncType(nil, []*types.Type{sli32, i8, sli32, i8, str, i8, i64, sli32},
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[]*types.Type{str, i64, str, sli32})
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exp := makeExpectedDump(`
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IN 0: R{ I0 I1 I2 } spilloffset: 0 typ: []int32
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IN 1: R{ I3 } spilloffset: 24 typ: int8
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IN 2: R{ I4 I5 I6 } spilloffset: 32 typ: []int32
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IN 3: R{ I7 } spilloffset: 56 typ: int8
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IN 4: R{ } offset: 0 typ: string
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IN 5: R{ I8 } spilloffset: 57 typ: int8
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IN 6: R{ } offset: 16 typ: int64
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IN 7: R{ } offset: 24 typ: []int32
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OUT 0: R{ I0 I1 } spilloffset: -1 typ: string
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OUT 1: R{ I2 } spilloffset: -1 typ: int64
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OUT 2: R{ I3 I4 } spilloffset: -1 typ: string
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OUT 3: R{ I5 I6 I7 } spilloffset: -1 typ: []int32
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offsetToSpillArea: 48 spillAreaSize: 64
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`)
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abitest(t, ft, exp)
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}
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func TestABIUtilsMethod(t *testing.T) {
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// type s1 struct { f1 int16; f2 int16; f3 int16 }
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// func(p1 *s1, p2 [7]*s1, p3 float64, p4 int16, p5 int16, p6 int16)
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// (r1 [7]*s1, r2 float64, r3 int64)
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i16 := types.Types[types.TINT16]
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i64 := types.Types[types.TINT64]
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f64 := types.Types[types.TFLOAT64]
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s1 := mkstruct([]*types.Type{i16, i16, i16})
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ps1 := types.NewPtr(s1)
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a7 := types.NewArray(ps1, 7)
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ft := mkFuncType(s1, []*types.Type{ps1, a7, f64, i16, i16, i16},
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[]*types.Type{a7, f64, i64})
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exp := makeExpectedDump(`
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IN 0: R{ I0 I1 I2 } spilloffset: 0 typ: struct { int16; int16; int16 }
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IN 1: R{ I3 } spilloffset: 8 typ: *struct { int16; int16; int16 }
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IN 2: R{ } offset: 0 typ: [7]*struct { int16; int16; int16 }
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IN 3: R{ F0 } spilloffset: 16 typ: float64
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IN 4: R{ I4 } spilloffset: 24 typ: int16
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IN 5: R{ I5 } spilloffset: 26 typ: int16
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IN 6: R{ I6 } spilloffset: 28 typ: int16
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OUT 0: R{ } offset: 56 typ: [7]*struct { int16; int16; int16 }
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OUT 1: R{ F0 } spilloffset: -1 typ: float64
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OUT 2: R{ I0 } spilloffset: -1 typ: int64
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offsetToSpillArea: 112 spillAreaSize: 32
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`)
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abitest(t, ft, exp)
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}
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func TestABIUtilsInterfaces(t *testing.T) {
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// type s1 { f1 int16; f2 int16; f3 bool)
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// type nei interface { ...() string }
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// func(p1 s1, p2 interface{}, p3 interface{}, p4 nei,
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// p5 *interface{}, p6 nei, p7 int64)
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// (r1 interface{}, r2 nei, r3 bool)
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ei := types.Types[types.TINTER] // interface{}
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pei := types.NewPtr(ei) // *interface{}
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fldt := mkFuncType(types.FakeRecvType(), []*types.Type{},
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[]*types.Type{types.UntypedString})
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field := types.NewField(src.NoXPos, nil, fldt)
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nei := types.NewInterface(types.LocalPkg, []*types.Field{field})
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i16 := types.Types[types.TINT16]
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tb := types.Types[types.TBOOL]
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s1 := mkstruct([]*types.Type{i16, i16, tb})
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ft := mkFuncType(nil, []*types.Type{s1, ei, ei, nei, pei, nei, i16},
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[]*types.Type{ei, nei, pei})
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exp := makeExpectedDump(`
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IN 0: R{ I0 I1 I2 } spilloffset: 0 typ: struct { int16; int16; bool }
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IN 1: R{ I3 I4 } spilloffset: 8 typ: interface {}
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IN 2: R{ I5 I6 } spilloffset: 24 typ: interface {}
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IN 3: R{ I7 I8 } spilloffset: 40 typ: interface { () untyped string }
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IN 4: R{ } offset: 0 typ: *interface {}
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IN 5: R{ } offset: 8 typ: interface { () untyped string }
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IN 6: R{ } offset: 24 typ: int16
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OUT 0: R{ I0 I1 } spilloffset: -1 typ: interface {}
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OUT 1: R{ I2 I3 } spilloffset: -1 typ: interface { () untyped string }
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OUT 2: R{ I4 } spilloffset: -1 typ: *interface {}
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offsetToSpillArea: 32 spillAreaSize: 56
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`)
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abitest(t, ft, exp)
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}
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func TestABINumParamRegs(t *testing.T) {
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i8 := types.Types[types.TINT8]
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i16 := types.Types[types.TINT16]
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i32 := types.Types[types.TINT32]
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i64 := types.Types[types.TINT64]
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f32 := types.Types[types.TFLOAT32]
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f64 := types.Types[types.TFLOAT64]
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c64 := types.Types[types.TCOMPLEX64]
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c128 := types.Types[types.TCOMPLEX128]
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s := mkstruct([]*types.Type{i8, i8, mkstruct([]*types.Type{}), i8, i16})
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a := types.NewArray(s, 3)
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nrtest(t, i8, 1)
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nrtest(t, i16, 1)
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nrtest(t, i32, 1)
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nrtest(t, i64, 1)
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nrtest(t, f32, 1)
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nrtest(t, f64, 1)
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nrtest(t, c64, 2)
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nrtest(t, c128, 2)
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nrtest(t, s, 4)
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nrtest(t, a, 12)
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}
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