[VOL-5486] Fix deprecated versions
Change-Id: If0b888d6c2f33b2f415c8b03b08dc994bb3df3f4
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
diff --git a/vendor/go.etcd.io/gofail/LICENSE b/vendor/go.etcd.io/gofail/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/vendor/go.etcd.io/gofail/LICENSE
@@ -0,0 +1,202 @@
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
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+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
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+ "You" (or "Your") shall mean an individual or Legal Entity
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+ not limited to compiled object code, generated documentation,
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+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
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+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
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+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
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+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
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+
+ APPENDIX: How to apply the Apache License to your work.
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+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
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+ 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
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diff --git a/vendor/go.etcd.io/gofail/NOTICE b/vendor/go.etcd.io/gofail/NOTICE
new file mode 100644
index 0000000..23a0ada
--- /dev/null
+++ b/vendor/go.etcd.io/gofail/NOTICE
@@ -0,0 +1,5 @@
+CoreOS Project
+Copyright 2018 CoreOS, Inc
+
+This product includes software developed at CoreOS, Inc.
+(http://www.coreos.com/).
diff --git a/vendor/go.etcd.io/gofail/runtime/failpoint.go b/vendor/go.etcd.io/gofail/runtime/failpoint.go
new file mode 100644
index 0000000..ea8db3f
--- /dev/null
+++ b/vendor/go.etcd.io/gofail/runtime/failpoint.go
@@ -0,0 +1,86 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// 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.
+
+package runtime
+
+import (
+ "fmt"
+ "sync"
+)
+
+type Failpoint struct {
+ t *terms
+ mux sync.RWMutex
+}
+
+func NewFailpoint(name string) *Failpoint {
+ return register(name)
+}
+
+// Acquire gets evalutes the failpoint terms; if the failpoint
+// is active, it will return a value. Otherwise, returns a non-nil error.
+//
+// Notice that during the exection of Acquire(), the failpoint can be disabled,
+// but the already in-flight execution won't be terminated
+func (fp *Failpoint) Acquire() (interface{}, error) {
+ fp.mux.RLock()
+ // terms are locked during execution, so deepcopy is not required as no change can be made during execution
+ cachedT := fp.t
+ fp.mux.RUnlock()
+
+ if cachedT == nil {
+ return nil, ErrDisabled
+ }
+ result := cachedT.eval()
+ if result == nil {
+ return nil, ErrDisabled
+ }
+ return result, nil
+}
+
+// BadType is called when the failpoint evaluates to the wrong type.
+func (fp *Failpoint) BadType(v interface{}, t string) {
+ fmt.Printf("failpoint: %q got value %v of type \"%T\" but expected type %q\n", fp.t.fpath, v, v, t)
+}
+
+func (fp *Failpoint) SetTerm(t *terms) {
+ fp.mux.Lock()
+ defer fp.mux.Unlock()
+
+ fp.t = t
+}
+
+func (fp *Failpoint) ClearTerm() error {
+ fp.mux.Lock()
+ defer fp.mux.Unlock()
+
+ if fp.t == nil {
+ return ErrDisabled
+ }
+ fp.t = nil
+
+ return nil
+}
+
+func (fp *Failpoint) Status() (string, int, error) {
+ fp.mux.RLock()
+ defer fp.mux.RUnlock()
+
+ t := fp.t
+ if t == nil {
+ return "", 0, ErrDisabled
+ }
+
+ return t.desc, t.counter, nil
+}
diff --git a/vendor/go.etcd.io/gofail/runtime/http.go b/vendor/go.etcd.io/gofail/runtime/http.go
new file mode 100644
index 0000000..84ecaf7
--- /dev/null
+++ b/vendor/go.etcd.io/gofail/runtime/http.go
@@ -0,0 +1,134 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// 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.
+
+package runtime
+
+import (
+ "errors"
+ "fmt"
+ "io"
+ "net"
+ "net/http"
+ "sort"
+ "strconv"
+ "strings"
+)
+
+type httpHandler struct{}
+
+func serve(host string) error {
+ ln, err := net.Listen("tcp", host)
+ if err != nil {
+ return err
+ }
+ go http.Serve(ln, &httpHandler{})
+ return nil
+}
+
+func (*httpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+ // Ensures the server(runtime) doesn't panic due to the execution of
+ // panic failpoints during processing of the HTTP request, as the
+ // sender of the HTTP request should not be affected by the execution
+ // of the panic failpoints and crash as a side effect
+ panicMu.Lock()
+ defer panicMu.Unlock()
+
+ // flush before unlocking so a panic failpoint won't
+ // take down the http server before it sends the response
+ defer flush(w)
+
+ key := r.RequestURI
+ if len(key) == 0 || key[0] != '/' {
+ http.Error(w, "malformed request URI", http.StatusBadRequest)
+ return
+ }
+ key = key[1:]
+
+ switch {
+ // sets the failpoint
+ case r.Method == "PUT":
+ v, err := io.ReadAll(r.Body)
+ if err != nil {
+ http.Error(w, "failed ReadAll in PUT", http.StatusBadRequest)
+ return
+ }
+
+ fpMap := map[string]string{key: string(v)}
+ if strings.EqualFold(key, "failpoints") {
+ fpMap, err = parseFailpoints(string(v))
+ if err != nil {
+ http.Error(w, fmt.Sprintf("fail to parse failpoint: %v", err), http.StatusBadRequest)
+ return
+ }
+ }
+
+ for k, v := range fpMap {
+ if err := Enable(k, v); err != nil {
+ http.Error(w, fmt.Sprintf("fail to set failpoint: %v", err), http.StatusBadRequest)
+ return
+ }
+ }
+ w.WriteHeader(http.StatusNoContent)
+
+ // gets status of the failpoint
+ case r.Method == "GET":
+ if len(key) == 0 {
+ fps := list()
+ sort.Strings(fps)
+ lines := make([]string, len(fps))
+ for i := range lines {
+ s, _, _ := Status(fps[i])
+ lines[i] = fps[i] + "=" + s
+ }
+ w.Write([]byte(strings.Join(lines, "\n") + "\n"))
+ } else if strings.HasSuffix(key, "/count") {
+ fp := key[:len(key)-len("/count")]
+ _, count, err := Status(fp)
+ if err != nil {
+ if errors.Is(err, ErrNoExist) {
+ http.Error(w, "failed to GET: "+err.Error(), http.StatusNotFound)
+ } else {
+ http.Error(w, "failed to GET: "+err.Error(), http.StatusInternalServerError)
+ }
+ return
+ }
+ w.Write([]byte(strconv.Itoa(count)))
+ } else {
+ status, _, err := Status(key)
+ if err != nil {
+ http.Error(w, "failed to GET: "+err.Error(), http.StatusNotFound)
+ }
+ w.Write([]byte(status + "\n"))
+ }
+
+ // deactivates a failpoint
+ case r.Method == "DELETE":
+ if err := Disable(key); err != nil {
+ http.Error(w, "failed to delete failpoint "+err.Error(), http.StatusBadRequest)
+ return
+ }
+ w.WriteHeader(http.StatusNoContent)
+ default:
+ w.Header().Add("Allow", "DELETE")
+ w.Header().Add("Allow", "GET")
+ w.Header().Set("Allow", "PUT")
+ http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+ }
+}
+
+func flush(w http.ResponseWriter) {
+ if f, ok := w.(http.Flusher); ok {
+ f.Flush()
+ }
+}
diff --git a/vendor/go.etcd.io/gofail/runtime/runtime.go b/vendor/go.etcd.io/gofail/runtime/runtime.go
new file mode 100644
index 0000000..f6e1589
--- /dev/null
+++ b/vendor/go.etcd.io/gofail/runtime/runtime.go
@@ -0,0 +1,151 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// 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.
+
+package runtime
+
+import (
+ "fmt"
+ "os"
+ "strings"
+ "sync"
+)
+
+var (
+ ErrNoExist = fmt.Errorf("failpoint: failpoint does not exist")
+ ErrDisabled = fmt.Errorf("failpoint: failpoint is disabled")
+
+ failpoints map[string]*Failpoint
+ // failpointsMu protects the failpoints map, preventing concurrent
+ // accesses during commands such as Enabling and Disabling
+ failpointsMu sync.RWMutex
+
+ envTerms map[string]string
+
+ // panicMu (panic mutex) ensures that the action of panic failpoints
+ // and serving of the HTTP requests won't be executed at the same time,
+ // avoiding the possibility that the server runtime panics during processing
+ // requests
+ panicMu sync.Mutex
+)
+
+func init() {
+ failpoints = make(map[string]*Failpoint)
+ envTerms = make(map[string]string)
+ if s := os.Getenv("GOFAIL_FAILPOINTS"); len(s) > 0 {
+ fpMap, err := parseFailpoints(s)
+ if err != nil {
+ fmt.Printf("fail to parse failpoint: %v\n", err)
+ os.Exit(1)
+ }
+ envTerms = fpMap
+ }
+ if s := os.Getenv("GOFAIL_HTTP"); len(s) > 0 {
+ if err := serve(s); err != nil {
+ fmt.Println(err)
+ os.Exit(1)
+ }
+ }
+}
+
+func parseFailpoints(fps string) (map[string]string, error) {
+ // The format is <FAILPOINT>=<TERMS>[;<FAILPOINT>=<TERMS>]*
+ fpMap := map[string]string{}
+
+ for _, fp := range strings.Split(fps, ";") {
+ if len(fp) == 0 {
+ continue
+ }
+ fpTerm := strings.Split(fp, "=")
+ if len(fpTerm) != 2 {
+ err := fmt.Errorf("bad failpoint %q", fp)
+ return nil, err
+ }
+ fpMap[fpTerm[0]] = fpTerm[1]
+ }
+ return fpMap, nil
+}
+
+// Enable sets a failpoint to a given failpoint description.
+func Enable(name, inTerms string) error {
+ failpointsMu.RLock()
+ fp := failpoints[name]
+ failpointsMu.RUnlock()
+ if fp == nil {
+ return ErrNoExist
+ }
+
+ t, err := newTerms(name, inTerms)
+ if err != nil {
+ fmt.Printf("failed to enable \"%s=%s\" (%v)\n", name, inTerms, err)
+ return err
+ }
+
+ fp.SetTerm(t)
+
+ return nil
+}
+
+// Disable stops a failpoint from firing.
+func Disable(name string) error {
+ failpointsMu.RLock()
+ fp := failpoints[name]
+ failpointsMu.RUnlock()
+ if fp == nil {
+ return ErrNoExist
+ }
+
+ return fp.ClearTerm()
+}
+
+// Status gives the current setting and execution count for the failpoint
+func Status(failpath string) (string, int, error) {
+ failpointsMu.RLock()
+ fp := failpoints[failpath]
+ failpointsMu.RUnlock()
+ if fp == nil {
+ return "", 0, ErrNoExist
+ }
+
+ return fp.Status()
+}
+
+func List() []string {
+ failpointsMu.Lock()
+ defer failpointsMu.Unlock()
+ return list()
+}
+
+func list() []string {
+ ret := make([]string, 0, len(failpoints))
+ for fp := range failpoints {
+ ret = append(ret, fp)
+ }
+ return ret
+}
+
+func register(name string) *Failpoint {
+ failpointsMu.Lock()
+ if _, ok := failpoints[name]; ok {
+ failpointsMu.Unlock()
+ panic(fmt.Sprintf("failpoint name %s is already registered.", name))
+ }
+
+ fp := &Failpoint{}
+ failpoints[name] = fp
+ failpointsMu.Unlock()
+ if t, ok := envTerms[name]; ok {
+ Enable(name, t)
+ }
+ return fp
+}
diff --git a/vendor/go.etcd.io/gofail/runtime/terms.go b/vendor/go.etcd.io/gofail/runtime/terms.go
new file mode 100644
index 0000000..b28b468
--- /dev/null
+++ b/vendor/go.etcd.io/gofail/runtime/terms.go
@@ -0,0 +1,356 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// 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.
+
+package runtime
+
+import (
+ "fmt"
+ "math/rand"
+ "os"
+ "os/exec"
+ "strings"
+ "sync"
+ "time"
+)
+
+var (
+ ErrExhausted = fmt.Errorf("failpoint: terms exhausted")
+ ErrBadParse = fmt.Errorf("failpoint: could not parse terms")
+)
+
+// terms encodes the state for a failpoint term string (see fail(9) for examples)
+// <fp> :: <term> ( "->" <term> )*
+type terms struct {
+ // chain is a slice of all the terms from desc
+ chain []*term
+ // desc is the full term given for the failpoint
+ desc string
+ // fpath is the failpoint path for these terms
+ fpath string
+
+ // mu protects the state of the terms chain
+ mu sync.Mutex
+ // tracks executions count of terms that are actually evaluated
+ counter int
+}
+
+// term is an executable unit of the failpoint terms chain
+type term struct {
+ desc string
+
+ mods mod
+ act actFunc
+ val interface{}
+
+ parent *terms
+}
+
+type mod interface {
+ allow() bool
+}
+
+type modCount struct{ c int }
+
+func (mc *modCount) allow() bool {
+ if mc.c > 0 {
+ mc.c--
+ return true
+ }
+ return false
+}
+
+type modProb struct{ p float64 }
+
+func (mp *modProb) allow() bool { return rand.Float64() <= mp.p }
+
+type modList struct{ l []mod }
+
+func (ml *modList) allow() bool {
+ for _, m := range ml.l {
+ if !m.allow() {
+ return false
+ }
+ }
+ return true
+}
+
+func newTerms(fpath, desc string) (*terms, error) {
+ chain := parse(desc)
+ if len(chain) == 0 {
+ return nil, ErrBadParse
+ }
+ t := &terms{chain: chain, desc: desc, fpath: fpath}
+ for _, c := range chain {
+ c.parent = t
+ }
+ return t, nil
+}
+
+func (t *terms) String() string { return t.desc }
+
+func (t *terms) eval() interface{} {
+ t.mu.Lock()
+ defer t.mu.Unlock()
+ for _, term := range t.chain {
+ if term.mods.allow() {
+ t.counter++
+ return term.do()
+ }
+ }
+ return nil
+}
+
+// split terms from a -> b -> ... into [a, b, ...]
+func parse(desc string) (chain []*term) {
+ origDesc := desc
+ for len(desc) != 0 {
+ t := parseTerm(desc)
+ if t == nil {
+ fmt.Printf("failed to parse %q past %q\n", origDesc, desc)
+ return nil
+ }
+ desc = desc[len(t.desc):]
+ chain = append(chain, t)
+ if len(desc) >= 2 {
+ if !strings.HasPrefix(desc, "->") {
+ fmt.Printf("failed to parse %q past %q, expected \"->\"\n", origDesc, desc)
+ return nil
+ }
+ desc = desc[2:]
+ }
+ }
+ return chain
+}
+
+// <term> :: <mod> <act> [ "(" <val> ")" ]
+func parseTerm(desc string) *term {
+ t := &term{}
+ modStr, mods := parseMod(desc)
+ t.mods = &modList{mods}
+ actStr, act := parseAct(desc[len(modStr):])
+ t.act = act
+ valStr, val := parseVal(desc[len(modStr)+len(actStr):])
+ t.val = val
+ t.desc = desc[:len(modStr)+len(actStr)+len(valStr)]
+ if len(t.desc) == 0 {
+ return nil
+ }
+ return t
+}
+
+// <mod> :: ((<float> "%")|(<int> "*" ))*
+func parseMod(desc string) (ret string, mods []mod) {
+ for {
+ s, v := parseIntFloat(desc)
+ if len(s) == 0 {
+ break
+ }
+ if len(s) == len(desc) {
+ return "", nil
+ }
+ switch v := v.(type) {
+ case float64:
+ if desc[len(s)] != '%' {
+ return "", nil
+ }
+ ret = ret + desc[:len(s)+1]
+ mods = append(mods, &modProb{v / 100.0})
+ desc = desc[len(s)+1:]
+ case int:
+ if desc[len(s)] != '*' {
+ return "", nil
+ }
+ ret = ret + desc[:len(s)+1]
+ mods = append(mods, &modCount{v})
+ desc = desc[len(s)+1:]
+ default:
+ panic("???")
+ }
+ }
+ return ret, mods
+}
+
+// parseIntFloat parses an int or float from a string and returns the string
+// it parsed it from (unlike scanf).
+func parseIntFloat(desc string) (string, interface{}) {
+ // parse for ints
+ i := 0
+ for i < len(desc) {
+ if desc[i] < '0' || desc[i] > '9' {
+ break
+ }
+ i++
+ }
+ if i == 0 {
+ return "", nil
+ }
+
+ intVal := int(0)
+ _, err := fmt.Sscanf(desc[:i], "%d", &intVal)
+ if err != nil {
+ return "", nil
+ }
+ if len(desc) == i {
+ return desc[:i], intVal
+ }
+ if desc[i] != '.' {
+ return desc[:i], intVal
+ }
+
+ // parse for floats
+ i++
+ if i == len(desc) {
+ return desc[:i], float64(intVal)
+ }
+
+ j := i
+ for i < len(desc) {
+ if desc[i] < '0' || desc[i] > '9' {
+ break
+ }
+ i++
+ }
+ if j == i {
+ return desc[:i], float64(intVal)
+ }
+
+ f := float64(0)
+ if _, err = fmt.Sscanf(desc[:i], "%f", &f); err != nil {
+ return "", nil
+ }
+ return desc[:i], f
+}
+
+// parseAct parses an action
+// <act> :: "off" | "return" | "sleep" | "panic" | "break" | "print"
+func parseAct(desc string) (string, actFunc) {
+ for k, v := range actMap {
+ if strings.HasPrefix(desc, k) {
+ return k, v
+ }
+ }
+ return "", nil
+}
+
+// <val> :: <int> | <string> | <bool> | <nothing>
+func parseVal(desc string) (string, interface{}) {
+ // return => struct{}
+ if len(desc) == 0 {
+ return "", struct{}{}
+ }
+ // malformed
+ if len(desc) == 1 || desc[0] != '(' {
+ return "", nil
+ }
+ // return() => struct{}
+ if desc[1] == ')' {
+ return "()", struct{}{}
+ }
+ // return("s") => string
+ s := ""
+ n, err := fmt.Sscanf(desc[1:], "%q", &s)
+ if n == 1 && err == nil {
+ return desc[:len(s)+4], s
+ }
+ // return(1) => int
+ v := 0
+ n, err = fmt.Sscanf(desc[1:], "%d", &v)
+ if n == 1 && err == nil {
+ return desc[:len(fmt.Sprintf("%d", v))+2], v
+ }
+ // return(true) => bool
+ b := false
+ n, err = fmt.Sscanf(desc[1:], "%t", &b)
+ if n == 1 && err == nil {
+ return desc[:len(fmt.Sprintf("%t", b))+2], b
+ }
+ // unknown type; malformed input?
+ return "", nil
+}
+
+type actFunc func(*term) interface{}
+
+var actMap = map[string]actFunc{
+ "off": actOff,
+ "return": actReturn,
+ "sleep": actSleep,
+ "panic": actPanic,
+ "break": actBreak,
+ "print": actPrint,
+}
+
+func (t *term) do() interface{} { return t.act(t) }
+
+func actOff(_ *term) interface{} { return nil }
+
+func actReturn(t *term) interface{} { return t.val }
+
+func actSleep(t *term) interface{} {
+ var dur time.Duration
+ switch v := t.val.(type) {
+ case int:
+ dur = time.Duration(v) * time.Millisecond
+ case string:
+ vDur, err := time.ParseDuration(v)
+ if err != nil {
+ fmt.Printf("failpoint: could not parse sleep(%v) on %s\n", v, t.parent.fpath)
+ return nil
+ }
+ dur = vDur
+ default:
+ fmt.Printf("failpoint: ignoring sleep(%v) on %s\n", v, t.parent.fpath)
+ return nil
+ }
+ time.Sleep(dur)
+ return nil
+}
+
+func actPanic(t *term) interface{} {
+ panicMu.Lock()
+ defer panicMu.Unlock()
+
+ if t.val != nil {
+ panic(fmt.Sprintf("failpoint panic: %v", t.val))
+ }
+ panic("failpoint panic: " + t.parent.fpath)
+}
+
+func actBreak(_ *term) interface{} {
+ p, perr := exec.LookPath(os.Args[0])
+ if perr != nil {
+ panic(perr)
+ }
+ cmd := exec.Command("gdb", p, fmt.Sprintf("%d", os.Getpid()))
+ cmd.Stdin = os.Stdin
+ cmd.Stdout = os.Stdout
+ cmd.Stderr = os.Stderr
+ if err := cmd.Start(); err != nil {
+ panic(err)
+ }
+
+ // wait for gdb prompt
+ // XXX: tried doing this by piping stdout here and waiting on "(gdb) "
+ // but the the output won't appear since the process is STOPed and
+ // can't copy it back to the actual stdout
+ time.Sleep(3 * time.Second)
+
+ // don't zombie gdb
+ go cmd.Wait()
+ return nil
+}
+
+func actPrint(t *term) interface{} {
+ fmt.Println("failpoint print:", t.parent.fpath)
+ return nil
+}