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// Copyright 2024 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package backend
import (
"testing"
)
// kcov is known to be broken in GCC versions < 14.
// If the version cannot be parsed, assume it is broken.
func TestIsKcovBrokenInCompiler(t *testing.T) {
inputDataTrue := []string{
"gcc (Debian 12.2.0-14) 12.2.0",
"gcc (Debian 13.2.0-5) 13.2.0",
"arm-unknown-linux-gnueabihf-g++ (GCC) 13.2.0",
"aarch64-unknown-linux-gnu-g++ (GCC) 11.1.0",
"g++ (Compiler-Explorer-Build-gcc-d3f1cf4e50356e44f745c5bc67ffd529cc4e2358-binutils-2.36.1) 12.0.0 20210426 (experimental)", // nolint:lll
"g++ (Compiler-Explorer-Build-gcc--binutils-2.40) 13.2.0",
"gcc (Compiler-Explorer-Build) 9.2.0",
"GCC something something",
}
inputDataFalse := []string{
"Debian clang version 16.0.6 (16)",
"arm-unknown-linux-gnueabihf-g++ (GCC) 14.0.1 20240124 (experimental)",
"g++ (Compiler-Explorer-Build-gcc-2a9637b229f64775d82fb5917f83f71e8ad1911d-binutils-2.40) 14.0.1 20240125 (experimental)", // nolint:lll
}
for _, ver := range inputDataTrue {
if !isKcovBrokenInCompiler(ver) {
t.Fatalf("isKcovBrokenInCompiler(%q) unexpectedly returned false", ver)
}
}
for _, ver := range inputDataFalse {
if isKcovBrokenInCompiler(ver) {
t.Fatalf("isKcovBrokenInCompiler(%q) unexpectedly returned true", ver)
}
}
}
type CleanPathAndroidTest struct {
SrcDir string
Delimiters []string
// Each test case is a triple of {path, epath, ename}, where path is passed to cleanPathAndroid(),
// and (epath, ename) is its expected return value.
Files [][3]string
FnExists func(string) bool
}
func TestCleanPathAndroid(t *testing.T) {
tests := []CleanPathAndroidTest{
// Test that paths with "/aosp/" and "/private/" in them are normalized.
{
SrcDir: "/src/kernel",
Delimiters: []string{"/aosp/", "/private/"},
Files: [][3]string{
{"/src/kernel/aosp/mm/mmap.c", "mm/mmap.c", "/src/kernel/aosp/mm/mmap.c"},
{"/src/kernel/out/cache/feedface/aosp/mm/mmap.c", "mm/mmap.c", "/src/kernel/aosp/mm/mmap.c"},
{"/src/kernel/out/cache/cafebabe/private/google_modules/module/mod.c", "google_modules/module/mod.c",
"/src/kernel/private/google_modules/module/mod.c"},
{"/some/other/path/aosp/mm/mmap.c", "mm/mmap.c", "/src/kernel/aosp/mm/mmap.c"},
},
FnExists: func(string) bool { return true },
},
// Test that for empty delimiters empty results are returned.
{
SrcDir: "/src/kernel/",
Delimiters: []string{},
Files: [][3]string{
{"/src/kernel/mm/mmap.c", "", ""},
},
FnExists: func(string) bool { return true },
},
// Test that for path that does not contain a delimiter the result is constructed based on FnExists().
{
SrcDir: "/src/kernel/",
Delimiters: []string{"/aosp/", "/private/"},
Files: [][3]string{
{"mm/mmap.c", "mm/mmap.c", "/src/kernel/aosp/mm/mmap.c"},
},
FnExists: func(s string) bool { return s == "/src/kernel/aosp/mm/mmap.c" },
},
// Test that for path that does not contain a delimiter the result is constructed based on FnExists().
{
SrcDir: "/src/kernel/",
Delimiters: []string{"/aosp/", "/private/"},
Files: [][3]string{
{"mm/mmap.c", "mm/mmap.c", "/src/kernel/private/mm/mmap.c"},
},
FnExists: func(s string) bool { return s != "/src/kernel/aosp/mm/mmap.c" },
},
}
for _, test := range tests {
for _, files := range test.Files {
path, epath, ename := files[0], files[1], files[2]
rpath, rname := cleanPathAndroid(path, test.SrcDir, test.Delimiters, test.FnExists)
if (rpath != epath) || (rname != ename) {
t.Fatalf("cleanPathAndroid(`%s`, `%s`, %v, ...) unexpectedly returned (`%s`, `%s`) instead of (`%s`, `%s`)",
path, test.SrcDir, test.Delimiters, rpath, rname, epath, ename)
}
}
}
}
type NextCallTargetTest struct {
Arch *Arch
Text uint64
Data []byte
ExpTarget uint64
ExpPC uint64
}
func runNextCallTarget(t *testing.T, arg NextCallTargetTest) {
i := 0
target, pc := nextCallTarget(arg.Arch, arg.Text, arg.Data, &i)
if target != arg.ExpTarget || pc != arg.ExpPC {
t.Fatalf("nextCallTarget(`%v`, %x, %v) unexpectedly returned (%x, %x) instead of (%x, %x)",
arg.Arch, arg.Text, arg.Data, target, pc, arg.ExpTarget, arg.ExpPC)
}
}
func TestNextCallTargetARM64(t *testing.T) {
tests := []NextCallTargetTest{
// ffff800080020010: 9414234f bl ffff800080528d4c <__sanitizer_cov_trace_pc>
{
Data: []byte{0x4f, 0x23, 0x14, 0x94},
ExpTarget: 0xffff800080528d4c,
ExpPC: 0xffff800080020010,
},
// ffff800080020088: 95fbe498 bl ffff800087f192e8 <__debug_smp_processor_id_veneer>
{
Data: []byte{0x98, 0xe4, 0xfb, 0x95},
ExpTarget: 0xffff800087f192e8,
ExpPC: 0xffff800080020088,
},
// ffff80008477626c: 96f6cab8 bl ffff800080528d4c <__sanitizer_cov_trace_pc>
{
Data: []byte{0xb8, 0xca, 0xf6, 0x96},
ExpTarget: 0xffff800080528d4c,
ExpPC: 0xffff80008477626c,
},
// ffff80008052aa18: 97fff8cd bl ffff800080528d4c <__sanitizer_cov_trace_pc>
{
Data: []byte{0xcd, 0xf8, 0xff, 0x97},
ExpTarget: 0xffff800080528d4c,
ExpPC: 0xffff80008052aa18,
},
}
for _, test := range tests {
test.Arch = arches["arm64"]
test.Text = test.ExpPC
runNextCallTarget(t, test)
}
}
func TestNextCallTargetAMD64(t *testing.T) {
tests := []NextCallTargetTest{
// ffffffff811744c6: e8 85 fb 7b 00 call ffffffff81934050 <__sanitizer_cov_trace_pc>
{
Data: []byte{0xe8, 0x85, 0xfb, 0x7b, 0x00},
Text: 0xffffffff811744c6,
ExpTarget: 0xffffffff81934050,
ExpPC: 0xffffffff811744c6,
},
// Same, but the search window starts two bytes earlier.
{
Data: []byte{0x90, 0x90, 0xe8, 0x85, 0xfb, 0x7b, 0x00},
Text: 0xffffffff811744c4,
ExpTarget: 0xffffffff81934050,
ExpPC: 0xffffffff811744c6,
},
}
for _, test := range tests {
test.Arch = arches["amd64"]
runNextCallTarget(t, test)
}
}
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