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// Copyright 2021 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_test
import (
"bytes"
"runtime"
"testing"
)
var testTracebackArgsBuf [1000]byte
func TestTracebackArgs(t *testing.T) {
tests := []struct {
fn func() int
expect string
}{
// simple ints
{
func() int { return testTracebackArgs1(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) },
"testTracebackArgs1(0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, ...)",
},
// some aggregates
{
func() int {
return testTracebackArgs2(false, struct {
a, b, c int
x [2]int
}{1, 2, 3, [2]int{4, 5}}, [0]int{}, [3]byte{6, 7, 8})
},
"testTracebackArgs2(0x0, {0x1, 0x2, 0x3, {0x4, 0x5}}, {}, {0x6, 0x7, 0x8})",
},
{
func() int { return testTracebackArgs3([3]byte{1, 2, 3}, 4, 5, 6, [3]byte{7, 8, 9}) },
"testTracebackArgs3({0x1, 0x2, 0x3}, 0x4, 0x5, 0x6, {0x7, 0x8, 0x9})",
},
// too deeply nested type
{
func() int { return testTracebackArgs4(false, [1][1][1][1][1][1][1][1][1][1]int{}) },
"testTracebackArgs4(0x0, {{{{{...}}}}})",
},
// a lot of zero-sized type
{
func() int {
z := [0]int{}
return testTracebackArgs5(false, struct {
x int
y [0]int
z [2][0]int
}{1, z, [2][0]int{}}, z, z, z, z, z, z, z, z, z, z, z, z)
},
"testTracebackArgs5(0x0, {0x1, {}, {{}, {}}}, {}, {}, {}, {}, {}, ...)",
},
}
for _, test := range tests {
n := test.fn()
got := testTracebackArgsBuf[:n]
if !bytes.Contains(got, []byte(test.expect)) {
t.Errorf("traceback does not contain expected string: want %q, got\n%s", test.expect, got)
}
}
}
//go:noinline
func testTracebackArgs1(a, b, c, d, e, f, g, h, i, j, k, l int) int {
n := runtime.Stack(testTracebackArgsBuf[:], false)
if a < 0 {
// use in-reg args to keep them alive
return a + b + c + d + e + f + g + h + i + j + k + l
}
return n
}
//go:noinline
func testTracebackArgs2(a bool, b struct {
a, b, c int
x [2]int
}, _ [0]int, d [3]byte) int {
n := runtime.Stack(testTracebackArgsBuf[:], false)
if a {
// use in-reg args to keep them alive
return b.a + b.b + b.c + b.x[0] + b.x[1] + int(d[0]) + int(d[1]) + int(d[2])
}
return n
}
//go:noinline
//go:registerparams
func testTracebackArgs3(x [3]byte, a, b, c int, y [3]byte) int {
n := runtime.Stack(testTracebackArgsBuf[:], false)
if a < 0 {
// use in-reg args to keep them alive
return int(x[0]) + int(x[1]) + int(x[2]) + a + b + c + int(y[0]) + int(y[1]) + int(y[2])
}
return n
}
//go:noinline
func testTracebackArgs4(a bool, x [1][1][1][1][1][1][1][1][1][1]int) int {
n := runtime.Stack(testTracebackArgsBuf[:], false)
if a {
panic(x) // use args to keep them alive
}
return n
}
//go:noinline
func testTracebackArgs5(a bool, x struct {
x int
y [0]int
z [2][0]int
}, _, _, _, _, _, _, _, _, _, _, _, _ [0]int) int {
n := runtime.Stack(testTracebackArgsBuf[:], false)
if a {
panic(x) // use args to keep them alive
}
return n
}
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