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247 lines
5.7 KiB
247 lines
5.7 KiB
// run
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// Copyright 2010 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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// Test that zero division causes a panic.
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package main
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import (
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"fmt"
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"math"
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"runtime"
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"strings"
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)
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type ErrorTest struct {
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name string
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fn func()
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err string
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}
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var (
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i, j, k int = 0, 0, 1
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i8, j8, k8 int8 = 0, 0, 1
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i16, j16, k16 int16 = 0, 0, 1
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i32, j32, k32 int32 = 0, 0, 1
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i64, j64, k64 int64 = 0, 0, 1
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bb = []int16{2, 0}
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u, v, w uint = 0, 0, 1
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u8, v8, w8 uint8 = 0, 0, 1
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u16, v16, w16 uint16 = 0, 0, 1
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u32, v32, w32 uint32 = 0, 0, 1
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u64, v64, w64 uint64 = 0, 0, 1
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up, vp, wp uintptr = 0, 0, 1
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f, g, h float64 = 0, 0, 1
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f32, g32, h32 float32 = 0, 0, 1
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f64, g64, h64, inf, negInf, nan float64 = 0, 0, 1, math.Inf(1), math.Inf(-1), math.NaN()
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c, d, e complex128 = 0 + 0i, 0 + 0i, 1 + 1i
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c64, d64, e64 complex64 = 0 + 0i, 0 + 0i, 1 + 1i
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c128, d128, e128 complex128 = 0 + 0i, 0 + 0i, 1 + 1i
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)
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// Fool gccgo into thinking that these variables can change.
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func NotCalled() {
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i++
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j++
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k++
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i8++
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j8++
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k8++
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i16++
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j16++
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k16++
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i32++
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j32++
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k32++
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i64++
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j64++
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k64++
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u++
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v++
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w++
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u8++
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v8++
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w8++
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u16++
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v16++
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w16++
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u32++
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v32++
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w32++
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u64++
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v64++
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w64++
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up++
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vp++
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wp++
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f += 1
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g += 1
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h += 1
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f32 += 1
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g32 += 1
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h32 += 1
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f64 += 1
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g64 += 1
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h64 += 1
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c += 1 + 1i
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d += 1 + 1i
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e += 1 + 1i
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c64 += 1 + 1i
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d64 += 1 + 1i
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e64 += 1 + 1i
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c128 += 1 + 1i
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d128 += 1 + 1i
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e128 += 1 + 1i
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}
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var tmp interface{}
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// We could assign to _ but the compiler optimizes it too easily.
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func use(v interface{}) {
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tmp = v
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}
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// Verify error/no error for all types.
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var errorTests = []ErrorTest{
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// All integer divide by zero should error.
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ErrorTest{"int 0/0", func() { use(i / j) }, "divide"},
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ErrorTest{"int8 0/0", func() { use(i8 / j8) }, "divide"},
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ErrorTest{"int16 0/0", func() { use(i16 / j16) }, "divide"},
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ErrorTest{"int32 0/0", func() { use(i32 / j32) }, "divide"},
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ErrorTest{"int64 0/0", func() { use(i64 / j64) }, "divide"},
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ErrorTest{"int 1/0", func() { use(k / j) }, "divide"},
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ErrorTest{"int8 1/0", func() { use(k8 / j8) }, "divide"},
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ErrorTest{"int16 1/0", func() { use(k16 / j16) }, "divide"},
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ErrorTest{"int32 1/0", func() { use(k32 / j32) }, "divide"},
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ErrorTest{"int64 1/0", func() { use(k64 / j64) }, "divide"},
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// From issue 5790, we should ensure that _ assignments
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// still evaluate and generate zerodivide panics.
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ErrorTest{"int16 _ = bb[0]/bb[1]", func() { _ = bb[0] / bb[1] }, "divide"},
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ErrorTest{"uint 0/0", func() { use(u / v) }, "divide"},
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ErrorTest{"uint8 0/0", func() { use(u8 / v8) }, "divide"},
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ErrorTest{"uint16 0/0", func() { use(u16 / v16) }, "divide"},
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ErrorTest{"uint32 0/0", func() { use(u32 / v32) }, "divide"},
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ErrorTest{"uint64 0/0", func() { use(u64 / v64) }, "divide"},
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ErrorTest{"uintptr 0/0", func() { use(up / vp) }, "divide"},
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ErrorTest{"uint 1/0", func() { use(w / v) }, "divide"},
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ErrorTest{"uint8 1/0", func() { use(w8 / v8) }, "divide"},
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ErrorTest{"uint16 1/0", func() { use(w16 / v16) }, "divide"},
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ErrorTest{"uint32 1/0", func() { use(w32 / v32) }, "divide"},
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ErrorTest{"uint64 1/0", func() { use(w64 / v64) }, "divide"},
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ErrorTest{"uintptr 1/0", func() { use(wp / vp) }, "divide"},
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// All float64ing divide by zero should not error.
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ErrorTest{"float64 0/0", func() { use(f / g) }, ""},
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ErrorTest{"float32 0/0", func() { use(f32 / g32) }, ""},
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ErrorTest{"float64 0/0", func() { use(f64 / g64) }, ""},
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ErrorTest{"float64 1/0", func() { use(h / g) }, ""},
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ErrorTest{"float32 1/0", func() { use(h32 / g32) }, ""},
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ErrorTest{"float64 1/0", func() { use(h64 / g64) }, ""},
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ErrorTest{"float64 inf/0", func() { use(inf / g64) }, ""},
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ErrorTest{"float64 -inf/0", func() { use(negInf / g64) }, ""},
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ErrorTest{"float64 nan/0", func() { use(nan / g64) }, ""},
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// All complex divide by zero should not error.
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ErrorTest{"complex 0/0", func() { use(c / d) }, ""},
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ErrorTest{"complex64 0/0", func() { use(c64 / d64) }, ""},
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ErrorTest{"complex128 0/0", func() { use(c128 / d128) }, ""},
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ErrorTest{"complex 1/0", func() { use(e / d) }, ""},
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ErrorTest{"complex64 1/0", func() { use(e64 / d64) }, ""},
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ErrorTest{"complex128 1/0", func() { use(e128 / d128) }, ""},
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}
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func error_(fn func()) (error string) {
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defer func() {
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if e := recover(); e != nil {
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error = e.(runtime.Error).Error()
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}
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}()
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fn()
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return ""
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}
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type FloatTest struct {
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f, g float64
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out float64
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}
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var float64Tests = []FloatTest{
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FloatTest{0, 0, nan},
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FloatTest{nan, 0, nan},
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FloatTest{inf, 0, inf},
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FloatTest{negInf, 0, negInf},
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}
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func alike(a, b float64) bool {
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switch {
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case math.IsNaN(a) && math.IsNaN(b):
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return true
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case a == b:
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return math.Signbit(a) == math.Signbit(b)
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}
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return false
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}
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func main() {
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bad := false
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for _, t := range errorTests {
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err := error_(t.fn)
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switch {
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case t.err == "" && err == "":
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// fine
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case t.err != "" && err == "":
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if !bad {
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bad = true
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fmt.Printf("BUG\n")
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}
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fmt.Printf("%s: expected %q; got no error\n", t.name, t.err)
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case t.err == "" && err != "":
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if !bad {
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bad = true
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fmt.Printf("BUG\n")
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}
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fmt.Printf("%s: expected no error; got %q\n", t.name, err)
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case t.err != "" && err != "":
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if strings.Index(err, t.err) < 0 {
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if !bad {
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bad = true
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fmt.Printf("BUG\n")
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}
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fmt.Printf("%s: expected %q; got %q\n", t.name, t.err, err)
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continue
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}
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}
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}
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// At this point we know we don't error on the values we're testing
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for _, t := range float64Tests {
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x := t.f / t.g
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if !alike(x, t.out) {
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if !bad {
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bad = true
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fmt.Printf("BUG\n")
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}
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fmt.Printf("%v/%v: expected %g error; got %g\n", t.f, t.g, t.out, x)
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}
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}
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if bad {
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panic("zerodivide")
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}
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}
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