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Commit d1ac5927 authored by Russ Cox's avatar Russ Cox
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runtime/pprof: add /proc/self/maps parsing test 

Delete old TestRuntimeFunctionTrimming, which is testing a dead API
and is now handled in end-to-end tests.

Change-Id: I64fc2991ed4a7690456356b5f6b546f36935bb67
Reviewed-on: https://go-review.googlesource.com/41815
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarMichael Matloob <matloob@golang.org>
parent c5b6c2ab
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Inline Side-by-side
Showing with 52 additions and 97 deletions
src/runtime/pprof/proto.go
View file @ d1ac5927
......@@ -370,7 +370,10 @@ func (b *profileBuilder) build() error {
// when emitting locations.
func (b *profileBuilder) readMapping() {
data, _ := ioutil.ReadFile("/proc/self/maps")
parseProcSelfMaps(data, b.addMapping)
}
func parseProcSelfMaps(data []byte, addMapping func(lo, hi, offset uint64, file, buildID string)) {
// $ cat /proc/self/maps
// 00400000-0040b000 r-xp 00000000 fc:01 787766 /bin/cat
// 0060a000-0060b000 r--p 0000a000 fc:01 787766 /bin/cat
......@@ -456,7 +459,11 @@ func (b *profileBuilder) readMapping() {
// enter the mappings into b.mem in the first place.
buildID, _ := elfBuildID(file)
b.mem = append(b.mem, memMap{uintptr(lo), uintptr(hi)})
b.pbMapping(tagProfile_Mapping, uint64(len(b.mem)), lo, hi, offset, file, buildID)
addMapping(lo, hi, offset, file, buildID)
}
}
func (b *profileBuilder) addMapping(lo, hi, offset uint64, file, buildID string) {
b.mem = append(b.mem, memMap{uintptr(lo), uintptr(hi)})
b.pbMapping(tagProfile_Mapping, uint64(len(b.mem)), lo, hi, offset, file, buildID)
}
src/runtime/pprof/proto_test.go
View file @ d1ac5927
......@@ -7,10 +7,12 @@ package pprof
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"reflect"
"runtime"
"runtime/pprof/internal/profile"
"strings"
"testing"
)
......@@ -163,101 +165,47 @@ func checkProfile(t *testing.T, p *profile.Profile, period int64, periodType *pr
}
}
type fakeFunc struct {
name string
file string
lineno int
}
func (f *fakeFunc) Name() string {
return f.name
}
func (f *fakeFunc) FileLine(uintptr) (string, int) {
return f.file, f.lineno
}
/*
// TestRuntimeFunctionTrimming tests if symbolize trims runtime functions as intended.
func TestRuntimeRunctionTrimming(t *testing.T) {
fakeFuncMap := map[uintptr]*fakeFunc{
0x10: &fakeFunc{"runtime.goexit", "runtime.go", 10},
0x20: &fakeFunc{"runtime.other", "runtime.go", 20},
0x30: &fakeFunc{"foo", "foo.go", 30},
0x40: &fakeFunc{"bar", "bar.go", 40},
}
backupFuncForPC := funcForPC
funcForPC = func(pc uintptr) function {
return fakeFuncMap[pc]
}
defer func() {
funcForPC = backupFuncForPC
}()
testLoc := []*profile.Location{
{ID: 1, Address: 0x10},
{ID: 2, Address: 0x20},
{ID: 3, Address: 0x30},
{ID: 4, Address: 0x40},
}
testProfile := &profile.Profile{
Sample: []*profile.Sample{
{Location: []*profile.Location{testLoc[0], testLoc[1], testLoc[3], testLoc[2]}},
{Location: []*profile.Location{testLoc[1], testLoc[3], testLoc[2]}},
{Location: []*profile.Location{testLoc[3], testLoc[2], testLoc[1]}},
{Location: []*profile.Location{testLoc[3], testLoc[2], testLoc[0]}},
{Location: []*profile.Location{testLoc[0], testLoc[1], testLoc[3], testLoc[0]}},
},
Location: testLoc,
}
testProfiles := make([]*profile.Profile, 2)
testProfiles[0] = testProfile.Copy()
testProfiles[1] = testProfile.Copy()
// Test case for profilez.
testProfiles[0].PeriodType = &profile.ValueType{Type: "cpu", Unit: "nanoseconds"}
// Test case for heapz.
testProfiles[1].PeriodType = &profile.ValueType{Type: "space", Unit: "bytes"}
wantFunc := []*profile.Function{
{ID: 1, Name: "runtime.goexit", SystemName: "runtime.goexit", Filename: "runtime.go"},
{ID: 2, Name: "runtime.other", SystemName: "runtime.other", Filename: "runtime.go"},
{ID: 3, Name: "foo", SystemName: "foo", Filename: "foo.go"},
{ID: 4, Name: "bar", SystemName: "bar", Filename: "bar.go"},
}
wantLoc := []*profile.Location{
{ID: 1, Address: 0x10, Line: []profile.Line{{Function: wantFunc[0], Line: 10}}},
{ID: 2, Address: 0x20, Line: []profile.Line{{Function: wantFunc[1], Line: 20}}},
{ID: 3, Address: 0x30, Line: []profile.Line{{Function: wantFunc[2], Line: 30}}},
{ID: 4, Address: 0x40, Line: []profile.Line{{Function: wantFunc[3], Line: 40}}},
}
wantProfiles := []*profile.Profile{
{
PeriodType: &profile.ValueType{Type: "cpu", Unit: "nanoseconds"},
Sample: []*profile.Sample{
{Location: []*profile.Location{wantLoc[1], wantLoc[3], wantLoc[2]}},
{Location: []*profile.Location{wantLoc[1], wantLoc[3], wantLoc[2]}},
{Location: []*profile.Location{wantLoc[3], wantLoc[2], wantLoc[1]}},
{Location: []*profile.Location{wantLoc[3], wantLoc[2]}},
{Location: []*profile.Location{wantLoc[1], wantLoc[3]}},
},
Location: wantLoc,
Function: wantFunc,
},
{
PeriodType: &profile.ValueType{Type: "space", Unit: "bytes"},
Sample: []*profile.Sample{
{Location: []*profile.Location{wantLoc[3], wantLoc[2]}},
{Location: []*profile.Location{wantLoc[3], wantLoc[2]}},
{Location: []*profile.Location{wantLoc[3], wantLoc[2], wantLoc[1]}},
{Location: []*profile.Location{wantLoc[3], wantLoc[2]}},
{Location: []*profile.Location{wantLoc[3]}},
},
Location: wantLoc,
Function: wantFunc,
},
}
for i := 0; i < 2; i++ {
symbolize(testProfiles[i])
if !reflect.DeepEqual(testProfiles[i], wantProfiles[i]) {
t.Errorf("incorrect trimming (testcase = %d): got {%v}, want {%v}", i, testProfiles[i], wantProfiles[i])
var profSelfMapsTests = `
00400000-0040b000 r-xp 00000000 fc:01 787766 /bin/cat
0060a000-0060b000 r--p 0000a000 fc:01 787766 /bin/cat
0060b000-0060c000 rw-p 0000b000 fc:01 787766 /bin/cat
014ab000-014cc000 rw-p 00000000 00:00 0 [heap]
7f7d76af8000-7f7d7797c000 r--p 00000000 fc:01 1318064 /usr/lib/locale/locale-archive
7f7d7797c000-7f7d77b36000 r-xp 00000000 fc:01 1180226 /lib/x86_64-linux-gnu/libc-2.19.so
7f7d77b36000-7f7d77d36000 ---p 001ba000 fc:01 1180226 /lib/x86_64-linux-gnu/libc-2.19.so
7f7d77d36000-7f7d77d3a000 r--p 001ba000 fc:01 1180226 /lib/x86_64-linux-gnu/libc-2.19.so
7f7d77d3a000-7f7d77d3c000 rw-p 001be000 fc:01 1180226 /lib/x86_64-linux-gnu/libc-2.19.so
7f7d77d3c000-7f7d77d41000 rw-p 00000000 00:00 0
7f7d77d41000-7f7d77d64000 r-xp 00000000 fc:01 1180217 /lib/x86_64-linux-gnu/ld-2.19.so
7f7d77f3f000-7f7d77f42000 rw-p 00000000 00:00 0
7f7d77f61000-7f7d77f63000 rw-p 00000000 00:00 0
7f7d77f63000-7f7d77f64000 r--p 00022000 fc:01 1180217 /lib/x86_64-linux-gnu/ld-2.19.so
7f7d77f64000-7f7d77f65000 rw-p 00023000 fc:01 1180217 /lib/x86_64-linux-gnu/ld-2.19.so
7f7d77f65000-7f7d77f66000 rw-p 00000000 00:00 0
7ffc342a2000-7ffc342c3000 rw-p 00000000 00:00 0 [stack]
7ffc34343000-7ffc34345000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000090 00:00 0 [vsyscall]
->
00400000 0040b000 00000000 /bin/cat
7f7d7797c000 7f7d77b36000 00000000 /lib/x86_64-linux-gnu/libc-2.19.so
7f7d77d41000 7f7d77d64000 00000000 /lib/x86_64-linux-gnu/ld-2.19.so
7ffc34343000 7ffc34345000 00000000 [vdso]
ffffffffff600000 ffffffffff601000 00000090 [vsyscall]
`
func TestProcSelfMaps(t *testing.T) {
for tx, tt := range strings.Split(profSelfMapsTests, "\n\n") {
i := strings.Index(tt, "->\n")
if i < 0 {
t.Fatal("malformed test case")
}
in, out := tt[:i], tt[i+len("->\n"):]
var buf bytes.Buffer
parseProcSelfMaps([]byte(in), func(lo, hi, offset uint64, file, buildID string) {
fmt.Fprintf(&buf, "%08x %08x %08x %s\n", lo, hi, offset, file)
})
if buf.String() != out {
t.Errorf("#%d: have:\n%s\nwant:\n%s", tx, buf.String(), out)
}
}
}
*/
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