Update procfs library (#1640)

Bump procfs to latest release.

Fixes: https://github.com/prometheus/node_exporter/issues/1625
Fixes: https://github.com/prometheus/node_exporter/issues/1634

Signed-off-by: Ben Kochie <superq@gmail.com>

go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/prometheus/client_golang v1.4.1
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.9.1
-	github.com/prometheus/procfs v0.0.10
+	github.com/prometheus/procfs v0.0.11
 	github.com/siebenmann/go-kstat v0.0.0-20160321171754-d34789b79745
 	github.com/soundcloud/go-runit v0.0.0-20150630195641-06ad41a06c4a
 	go.uber.org/atomic v1.5.1 // indirect

go.sum

@@ -275,8 +275,8 @@ github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1/go.mod h1:c3At6R
 github.com/prometheus/procfs v0.0.2 h1:6LJUbpNm42llc4HRCuvApCSWB/WfhuNo9K98Q9sNGfs=
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
-github.com/prometheus/procfs v0.0.10 h1:QJQN3jYQhkamO4mhfUWqdDH2asK7ONOI9MTWjyAxNKM=
-github.com/prometheus/procfs v0.0.10/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
+github.com/prometheus/procfs v0.0.11 h1:DhHlBtkHWPYi8O2y31JkK0TF+DGM+51OopZjH/Ia5qI=
+github.com/prometheus/procfs v0.0.11/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
 github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
@@ -405,6 +405,7 @@ golang.org/x/sys v0.0.0-20190902133755-9109b7679e13/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20191008105621-543471e840be h1:QAcqgptGM8IQBC9K/RC4o+O9YmqEm0diQn9QmZw/0mU=
 golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191220142924-d4481acd189f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200217220822-9197077df867 h1:JoRuNIf+rpHl+VhScRQQvzbHed86tKkqwPMV34T8myw=

vendor/github.com/prometheus/procfs/.golangci.yml

@@ -1,4 +1,4 @@
+---
 linters:
   enable:
-  - staticcheck
-  - govet
+  - golint

vendor/github.com/prometheus/procfs/Makefile.common

@@ -69,6 +69,15 @@ else
 	GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)
 endif
 
+GOTEST := $(GO) test
+GOTEST_DIR :=
+ifneq ($(CIRCLE_JOB),)
+ifneq ($(shell which gotestsum),)
+	GOTEST_DIR := test-results
+	GOTEST := gotestsum --junitfile $(GOTEST_DIR)/unit-tests.xml --
+endif
+endif
+
 PROMU_VERSION ?= 0.5.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
@@ -142,14 +151,17 @@ else
 endif
 
 .PHONY: common-test-short
-common-test-short:
+common-test-short: $(GOTEST_DIR)
 	@echo ">> running short tests"
-	GO111MODULE=$(GO111MODULE) $(GO) test -short $(GOOPTS) $(pkgs)
+	GO111MODULE=$(GO111MODULE) $(GOTEST) -short $(GOOPTS) $(pkgs)
 
 .PHONY: common-test
-common-test:
+common-test: $(GOTEST_DIR)
 	@echo ">> running all tests"
-	GO111MODULE=$(GO111MODULE) $(GO) test $(test-flags) $(GOOPTS) $(pkgs)
+	GO111MODULE=$(GO111MODULE) $(GOTEST) $(test-flags) $(GOOPTS) $(pkgs)
+
+$(GOTEST_DIR):
+	@mkdir -p $@
 
 .PHONY: common-format
 common-format:

vendor/github.com/prometheus/procfs/bcache/bcache.go

@@ -29,7 +29,7 @@ type Stats struct {
 }
 
 // BcacheStats contains statistics tied to a bcache ID.
-type BcacheStats struct {
+type BcacheStats struct { // nolint:golint
 	AverageKeySize        uint64
 	BtreeCacheSize        uint64
 	CacheAvailablePercent uint64

vendor/github.com/prometheus/procfs/bcache/get.go

@@ -51,8 +51,21 @@ func NewFS(mountPoint string) (FS, error) {
 	return FS{&fs}, nil
 }
 
-// Stats retrieves bcache runtime statistics for each bcache.
+// Stats is a wrapper around stats()
+// It returns full available statistics
 func (fs FS) Stats() ([]*Stats, error) {
+	return fs.stats(true)
+}
+
+// StatsWithoutPriority is a wrapper around stats().
+// It ignores priority_stats file, because it is expensive to read.
+func (fs FS) StatsWithoutPriority() ([]*Stats, error) {
+	return fs.stats(false)
+}
+
+// stats() retrieves bcache runtime statistics for each bcache.
+// priorityStats flag controls if we need to read priority_stats.
+func (fs FS) stats(priorityStats bool) ([]*Stats, error) {
 	matches, err := filepath.Glob(fs.sys.Path("fs/bcache/*-*"))
 	if err != nil {
 		return nil, err
@@ -64,7 +77,7 @@ func (fs FS) Stats() ([]*Stats, error) {
 		name := filepath.Base(uuidPath)
 
 		// stats
-		s, err := GetStats(uuidPath)
+		s, err := GetStats(uuidPath, priorityStats)
 		if err != nil {
 			return nil, err
 		}
@@ -251,7 +264,7 @@ func (p *parser) getPriorityStats() PriorityStats {
 }
 
 // GetStats collects from sysfs files data tied to one bcache ID.
-func GetStats(uuidPath string) (*Stats, error) {
+func GetStats(uuidPath string, priorityStats bool) (*Stats, error) {
 	var bs Stats
 
 	par := parser{uuidPath: uuidPath}
@@ -370,9 +383,11 @@ func GetStats(uuidPath string) (*Stats, error) {
 		cs.MetadataWritten = par.readValue("metadata_written")
 		cs.Written = par.readValue("written")
 
+		if priorityStats {
 			ps := par.getPriorityStats()
 			cs.Priority = ps
 		}
+	}
 
 	if par.err != nil {
 		return nil, par.err

vendor/github.com/prometheus/procfs/fixtures.ttar

@@ -289,6 +289,19 @@ Max realtime priority     0                    0
 Max realtime timeout      unlimited            unlimited            us
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/26232/maps
+Lines: 9
+55680ae1e000-55680ae20000 r--p 00000000 fd:01 47316994                   /bin/cat
+55680ae29000-55680ae2a000 rwxs 0000a000 fd:01 47316994                   /bin/cat
+55680bed6000-55680bef7000 rw-p 00000000 00:00 0                          [heap]
+7fdf964fc000-7fdf973f2000 r--p 00000000 fd:01 17432624                   /usr/lib/locale/locale-archive
+7fdf973f2000-7fdf97417000 r--p 00000000 fd:01 60571062                   /lib/x86_64-linux-gnu/libc-2.29.so
+7ffe9215c000-7ffe9217f000 rw-p 00000000 00:00 0                          [stack]
+7ffe921da000-7ffe921dd000 r--p 00000000 00:00 0                          [vvar]
+7ffe921dd000-7ffe921de000 r-xp 00000000 00:00 0                          [vdso]
+ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0                  [vsyscall]
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/26232/root
 SymlinkTo: /does/not/exist
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -317,6 +330,17 @@ Lines: 8
                 ||     ||
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/proc/26234
+Mode: 755
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/26234/maps
+Lines: 4
+08048000-08089000 r-xp 00000000 03:01 104219 /bin/tcsh
+08089000-0808c000 rw-p 00041000 03:01 104219 /bin/tcsh
+0808c000-08146000 rwxp 00000000 00:00 0
+40000000-40015000 r-xp 00000000 03:01 61874 /lib/ld-2.3.2.so
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: fixtures/proc/584
 Mode: 755
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -1527,11 +1551,6 @@ blocksize    : 16
 min keysize  : 16
 max keysize  : 32
 
-Mode: 444
-# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-Path: fixtures/proc/loadavg
-Lines: 1
-0.02 0.04 0.05 1/497 11947
 Mode: 444
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/diskstats
@@ -1620,6 +1639,11 @@ xpc 399724544 92823103 86219234
 debug 0
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/loadavg
+Lines: 1
+0.02 0.04 0.05 1/497 11947
+Mode: 444
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/mdstat
 Lines: 56
 Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
@@ -1827,8 +1851,14 @@ FRAG6: inuse 0 memory 0
 Mode: 444
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/net/softnet_stat
-Lines: 1
+Lines: 2
 00015c73 00020e76 F0000769 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+01663fb2 00000000 000109a4 00000000 00000000 00000000 00000000 00000000 00000000
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/net/softnet_stat.broken
+Lines: 1
+00015c73 00020e76 F0000769 00000000
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/net/udp

vendor/github.com/prometheus/procfs/go.mod

@@ -5,4 +5,5 @@ go 1.12
 require (
 	github.com/google/go-cmp v0.3.1
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
+	golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e
 )

vendor/github.com/prometheus/procfs/go.sum

@@ -2,3 +2,5 @@ github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e h1:LwyF2AFISC9nVbS6MgzsaQNSUsRXI49GS+YQ5KX/QH0=
+golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/prometheus/procfs/mountinfo.go

@@ -29,10 +29,10 @@ import (
 // is described in the following man page.
 // http://man7.org/linux/man-pages/man5/proc.5.html
 type MountInfo struct {
-	// Unique Id for the mount
-	MountId int
-	// The Id of the parent mount
-	ParentId int
+	// Unique ID for the mount
+	MountID int
+	// The ID of the parent mount
+	ParentID int
 	// The value of `st_dev` for the files on this FS
 	MajorMinorVer string
 	// The pathname of the directory in the FS that forms
@@ -96,11 +96,11 @@ func parseMountInfoString(mountString string) (*MountInfo, error) {
 		SuperOptions:   mountOptionsParser(mountInfo[mountInfoLength-1]),
 	}
 
-	mount.MountId, err = strconv.Atoi(mountInfo[0])
+	mount.MountID, err = strconv.Atoi(mountInfo[0])
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse mount ID")
 	}
-	mount.ParentId, err = strconv.Atoi(mountInfo[1])
+	mount.ParentID, err = strconv.Atoi(mountInfo[1])
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse parent ID")
 	}

vendor/github.com/prometheus/procfs/net_softnet.go

@@ -25,7 +25,9 @@ import (
 )
 
 // For the proc file format details,
-// see https://elixir.bootlin.com/linux/v4.17/source/net/core/net-procfs.c#L162
+// See:
+// * Linux 2.6.23 https://elixir.bootlin.com/linux/v2.6.23/source/net/core/dev.c#L2343
+// * Linux 4.17 https://elixir.bootlin.com/linux/v4.17/source/net/core/net-procfs.c#L162
 // and https://elixir.bootlin.com/linux/v4.17/source/include/linux/netdevice.h#L2810.
 
 // SoftnetStat contains a single row of data from /proc/net/softnet_stat
@@ -38,9 +40,11 @@ type SoftnetStat struct {
 	TimeSqueezed uint32
 }
 
+var softNetProcFile = "net/softnet_stat"
+
 // NetSoftnetStat reads data from /proc/net/softnet_stat.
 func (fs FS) NetSoftnetStat() ([]SoftnetStat, error) {
-	b, err := util.ReadFileNoStat(fs.proc.Path("net/softnet_stat"))
+	b, err := util.ReadFileNoStat(fs.proc.Path(softNetProcFile))
 	if err != nil {
 		return nil, err
 	}
@@ -54,7 +58,7 @@ func (fs FS) NetSoftnetStat() ([]SoftnetStat, error) {
 }
 
 func parseSoftnet(r io.Reader) ([]SoftnetStat, error) {
-	const expectedColumns = 11
+	const minColumns = 9
 
 	s := bufio.NewScanner(r)
 
@@ -63,8 +67,8 @@ func parseSoftnet(r io.Reader) ([]SoftnetStat, error) {
 		columns := strings.Fields(s.Text())
 		width := len(columns)
 
-		if width != 11 {
-			return nil, fmt.Errorf("%d columns were detected, but %d were expected", width, expectedColumns)
+		if width < minColumns {
+			return nil, fmt.Errorf("%d columns were detected, but at least %d were expected", width, minColumns)
 		}
 
 		// We only parse the first three columns at the moment.

vendor/github.com/prometheus/procfs/proc_fdinfo.go

@@ -16,6 +16,7 @@ package procfs
 import (
 	"bufio"
 	"bytes"
+	"errors"
 	"regexp"
 
 	"github.com/prometheus/procfs/internal/util"
@@ -27,6 +28,7 @@ var (
 	rFlags        = regexp.MustCompile(`^flags:\s+(\d+)$`)
 	rMntID        = regexp.MustCompile(`^mnt_id:\s+(\d+)$`)
 	rInotify      = regexp.MustCompile(`^inotify`)
+	rInotifyParts = regexp.MustCompile(`^inotify\s+wd:([0-9a-f]+)\s+ino:([0-9a-f]+)\s+sdev:([0-9a-f]+)(?:\s+mask:([0-9a-f]+))?`)
 )
 
 // ProcFDInfo contains represents file descriptor information.
@@ -96,15 +98,21 @@ type InotifyInfo struct {
 
 // InotifyInfo constructor. Only available on kernel 3.8+.
 func parseInotifyInfo(line string) (*InotifyInfo, error) {
-	r := regexp.MustCompile(`^inotify\s+wd:([0-9a-f]+)\s+ino:([0-9a-f]+)\s+sdev:([0-9a-f]+)\s+mask:([0-9a-f]+)`)
-	m := r.FindStringSubmatch(line)
+	m := rInotifyParts.FindStringSubmatch(line)
+	if len(m) >= 4 {
+		var mask string
+		if len(m) == 5 {
+			mask = m[4]
+		}
 		i := &InotifyInfo{
 			WD:   m[1],
 			Ino:  m[2],
 			Sdev: m[3],
-		Mask: m[4],
+			Mask: mask,
 		}
 		return i, nil
+	}
+	return nil, errors.New("invalid inode entry: " + line)
 }
 
 // ProcFDInfos represents a list of ProcFDInfo structs.

vendor/github.com/prometheus/procfs/proc_maps.go

@@ -0,0 +1,208 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !windows
+
+package procfs
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"golang.org/x/sys/unix"
+)
+
+type ProcMapPermissions struct {
+	// mapping has the [R]ead flag set
+	Read bool
+	// mapping has the [W]rite flag set
+	Write bool
+	// mapping has the [X]ecutable flag set
+	Execute bool
+	// mapping has the [S]hared flag set
+	Shared bool
+	// mapping is marked as [P]rivate (copy on write)
+	Private bool
+}
+
+// ProcMap contains the process memory-mappings of the process,
+// read from /proc/[pid]/maps
+type ProcMap struct {
+	// The start address of current mapping.
+	StartAddr uintptr
+	// The end address of the current mapping
+	EndAddr uintptr
+	// The permissions for this mapping
+	Perms *ProcMapPermissions
+	// The current offset into the file/fd (e.g., shared libs)
+	Offset int64
+	// Device owner of this mapping (major:minor) in Mkdev format.
+	Dev uint64
+	// The inode of the device above
+	Inode uint64
+	// The file or psuedofile (or empty==anonymous)
+	Pathname string
+}
+
+// parseDevice parses the device token of a line and converts it to a dev_t
+// (mkdev) like structure.
+func parseDevice(s string) (uint64, error) {
+	toks := strings.Split(s, ":")
+	if len(toks) < 2 {
+		return 0, fmt.Errorf("unexpected number of fields")
+	}
+
+	major, err := strconv.ParseUint(toks[0], 16, 0)
+	if err != nil {
+		return 0, err
+	}
+
+	minor, err := strconv.ParseUint(toks[1], 16, 0)
+	if err != nil {
+		return 0, err
+	}
+
+	return unix.Mkdev(uint32(major), uint32(minor)), nil
+}
+
+// parseAddress just converts a hex-string to a uintptr
+func parseAddress(s string) (uintptr, error) {
+	a, err := strconv.ParseUint(s, 16, 0)
+	if err != nil {
+		return 0, err
+	}
+
+	return uintptr(a), nil
+}
+
+// parseAddresses parses the start-end address
+func parseAddresses(s string) (uintptr, uintptr, error) {
+	toks := strings.Split(s, "-")
+	if len(toks) < 2 {
+		return 0, 0, fmt.Errorf("invalid address")
+	}
+
+	saddr, err := parseAddress(toks[0])
+	if err != nil {
+		return 0, 0, err
+	}
+
+	eaddr, err := parseAddress(toks[1])
+	if err != nil {
+		return 0, 0, err
+	}
+
+	return saddr, eaddr, nil
+}
+
+// parsePermissions parses a token and returns any that are set.
+func parsePermissions(s string) (*ProcMapPermissions, error) {
+	if len(s) < 4 {
+		return nil, fmt.Errorf("invalid permissions token")
+	}
+
+	perms := ProcMapPermissions{}
+	for _, ch := range s {
+		switch ch {
+		case 'r':
+			perms.Read = true
+		case 'w':
+			perms.Write = true
+		case 'x':
+			perms.Execute = true
+		case 'p':
+			perms.Private = true
+		case 's':
+			perms.Shared = true
+		}
+	}
+
+	return &perms, nil
+}
+
+// parseProcMap will attempt to parse a single line within a proc/[pid]/maps
+// buffer.
+func parseProcMap(text string) (*ProcMap, error) {
+	fields := strings.Fields(text)
+	if len(fields) < 5 {
+		return nil, fmt.Errorf("truncated procmap entry")
+	}
+
+	saddr, eaddr, err := parseAddresses(fields[0])
+	if err != nil {
+		return nil, err
+	}
+
+	perms, err := parsePermissions(fields[1])
+	if err != nil {
+		return nil, err
+	}
+
+	offset, err := strconv.ParseInt(fields[2], 16, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	device, err := parseDevice(fields[3])
+	if err != nil {
+		return nil, err
+	}
+
+	inode, err := strconv.ParseUint(fields[4], 10, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	pathname := ""
+
+	if len(fields) >= 5 {
+		pathname = strings.Join(fields[5:], " ")
+	}
+
+	return &ProcMap{
+		StartAddr: saddr,
+		EndAddr:   eaddr,
+		Perms:     perms,
+		Offset:    offset,
+		Dev:       device,
+		Inode:     inode,
+		Pathname:  pathname,
+	}, nil
+}
+
+// ProcMaps reads from /proc/[pid]/maps to get the memory-mappings of the
+// process.
+func (p Proc) ProcMaps() ([]*ProcMap, error) {
+	file, err := os.Open(p.path("maps"))
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	maps := []*ProcMap{}
+	scan := bufio.NewScanner(file)
+
+	for scan.Scan() {
+		m, err := parseProcMap(scan.Text())
+		if err != nil {
+			return nil, err
+		}
+
+		maps = append(maps, m)
+	}
+
+	return maps, nil
+}

vendor/github.com/prometheus/procfs/proc_status.go

@@ -33,37 +33,37 @@ type ProcStatus struct {
 	TGID int
 
 	// Peak virtual memory size.
-	VmPeak uint64
+	VmPeak uint64 // nolint:golint
 	// Virtual memory size.
-	VmSize uint64
+	VmSize uint64 // nolint:golint
 	// Locked memory size.
-	VmLck uint64
+	VmLck uint64 // nolint:golint
 	// Pinned memory size.
-	VmPin uint64
+	VmPin uint64 // nolint:golint
 	// Peak resident set size.
-	VmHWM uint64
+	VmHWM uint64 // nolint:golint
 	// Resident set size (sum of RssAnnon RssFile and RssShmem).
-	VmRSS uint64
+	VmRSS uint64 // nolint:golint
 	// Size of resident anonymous memory.
-	RssAnon uint64
+	RssAnon uint64 // nolint:golint
 	// Size of resident file mappings.
-	RssFile uint64
+	RssFile uint64 // nolint:golint
 	// Size of resident shared memory.
-	RssShmem uint64
+	RssShmem uint64 // nolint:golint
 	// Size of data segments.
-	VmData uint64
+	VmData uint64 // nolint:golint
 	// Size of stack segments.
-	VmStk uint64
+	VmStk uint64 // nolint:golint
 	// Size of text segments.
-	VmExe uint64
+	VmExe uint64 // nolint:golint
 	// Shared library code size.
-	VmLib uint64
+	VmLib uint64 // nolint:golint
 	// Page table entries size.
-	VmPTE uint64
+	VmPTE uint64 // nolint:golint
 	// Size of second-level page tables.
-	VmPMD uint64
+	VmPMD uint64 // nolint:golint
 	// Swapped-out virtual memory size by anonymous private.
-	VmSwap uint64
+	VmSwap uint64 // nolint:golint
 	// Size of hugetlb memory portions
 	HugetlbPages uint64
 

vendor/github.com/prometheus/procfs/sysfs/class_infiniband.go

@@ -251,7 +251,7 @@ func parseInfiniBandCounters(portPath string) (*InfiniBandCounters, error) {
 		name := filepath.Join(path, f.Name())
 		value, err := util.SysReadFile(name)
 		if err != nil {
-			if os.IsNotExist(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
+			if os.IsNotExist(err) || os.IsPermission(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
 				continue
 			}
 			return nil, fmt.Errorf("failed to read file %q: %v", name, err)
@@ -334,7 +334,7 @@ func parseInfiniBandCounters(portPath string) (*InfiniBandCounters, error) {
 		name := filepath.Join(path, f.Name())
 		value, err := util.SysReadFile(name)
 		if err != nil {
-			if os.IsNotExist(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
+			if os.IsNotExist(err) || os.IsPermission(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
 				continue
 			}
 			return nil, fmt.Errorf("failed to read file %q: %v", name, err)

vendor/github.com/prometheus/procfs/sysfs/net_class.go

@@ -119,7 +119,7 @@ func (nc NetClass) parseNetClassIface(devicePath string) (*NetClassIface, error)
 		name := filepath.Join(devicePath, f.Name())
 		value, err := util.SysReadFile(name)
 		if err != nil {
-			if os.IsNotExist(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
+			if os.IsNotExist(err) || os.IsPermission(err) || err.Error() == "operation not supported" || err.Error() == "invalid argument" {
 				continue
 			}
 			return nil, fmt.Errorf("failed to read file %q: %v", name, err)

vendor/modules.txt

@@ -59,7 +59,7 @@ github.com/prometheus/common/model
 github.com/prometheus/common/promlog
 github.com/prometheus/common/promlog/flag
 github.com/prometheus/common/version
-# github.com/prometheus/procfs v0.0.10
+# github.com/prometheus/procfs v0.0.11
 github.com/prometheus/procfs
 github.com/prometheus/procfs/bcache
 github.com/prometheus/procfs/btrfs