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resources.go
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/
resources.go
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// Copyright (C) 2017 Google 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 resolve
import (
"context"
"fmt"
"github.com/google/gapid/core/data/id"
"github.com/google/gapid/core/log"
"github.com/google/gapid/gapis/api"
"github.com/google/gapid/gapis/capture"
"github.com/google/gapid/gapis/database"
"github.com/google/gapid/gapis/resolve/initialcmds"
"github.com/google/gapid/gapis/service"
"github.com/google/gapid/gapis/service/path"
)
// Resources resolves all the resources used by the specified capture.
func Resources(ctx context.Context, c *path.Capture, r *path.ResolveConfig) (*service.Resources, error) {
obj, err := database.Build(ctx, &ResourcesResolvable{Capture: c, Config: r})
if err != nil {
return nil, err
}
return obj.(*service.Resources), nil
}
// Resolve implements the database.Resolver interface.
func (r *ResourcesResolvable) Resolve(ctx context.Context) (interface{}, error) {
ctx = SetupContext(ctx, r.Capture, r.Config)
capture, err := capture.ResolveGraphics(ctx)
if err != nil {
return nil, err
}
resources := []trackedResource{}
resourceTypes := map[string]api.ResourceType{}
seen := map[api.Resource]int{}
var currentCmdIndex uint64
var currentCmdResourceCount int
var currentThread uint64
var currentAPI api.API
// If the capture contains initial state, build the necessary commands to recreate it.
initialCmds, ranges, err := initialcmds.InitialCommands(ctx, r.Capture)
if err != nil {
return nil, err
}
state := capture.NewUninitializedState(ctx).ReserveMemory(ranges)
state.OnResourceCreated = func(res api.Resource) {
currentCmdResourceCount++
context := currentAPI.Context(ctx, state, currentThread)
tr := trackedResource{
resource: res,
id: genResourceID(currentCmdIndex, currentCmdResourceCount),
context: r.Capture.Context(id.ID(context.ID())),
accesses: []uint64{currentCmdIndex},
created: currentCmdIndex,
}
resources = append(resources, tr)
seen[res] = len(resources) - 1
resourceTypes[tr.id.String()] = res.ResourceType(ctx)
}
state.OnResourceAccessed = func(r api.Resource) {
if index, ok := seen[r]; ok { // Update the list of accesses
numAccesses := len(resources[index].accesses)
if numAccesses == 0 || resources[index].accesses[numAccesses-1] != currentCmdIndex {
resources[index].accesses = append(resources[index].accesses, currentCmdIndex)
}
}
}
// Resources destroyed during state reconstructions should be hidden from the user, as they are
// temporary objects created to correctly reconstruct the state.
state.OnResourceDestroyed = func(r api.Resource) {
delete(seen, r)
}
err = api.ForeachCmd(ctx, initialCmds, true, func(ctx context.Context, id api.CmdID, cmd api.Cmd) error {
currentThread = cmd.Thread()
currentAPI = cmd.API()
if err := cmd.Mutate(ctx, id, state, nil, nil); err != nil {
log.E(ctx, "Get resources: Initial cmd [%v]%v - %v", id, cmd, err)
return fmt.Errorf("Fail to mutate command %v: %v", cmd, err)
}
return nil
})
if err != nil {
return nil, err
}
state.OnResourceDestroyed = func(r api.Resource) {
if index, ok := seen[r]; ok {
resources[index].deleted = currentCmdIndex
}
}
err = api.ForeachCmd(ctx, capture.Commands, true, func(ctx context.Context, id api.CmdID, cmd api.Cmd) error {
currentCmdResourceCount = 0
currentCmdIndex = uint64(id)
currentThread = cmd.Thread()
currentAPI = cmd.API()
if err := cmd.Mutate(ctx, id, state, nil, nil); err != nil {
return fmt.Errorf("Fail to mutate command %v: %v", cmd, err)
}
return nil
})
if err != nil {
return nil, err
}
types := map[api.ResourceType]*service.ResourcesByType{}
for _, tr := range resources {
if _, ok := seen[tr.resource]; !ok {
continue
}
ty := tr.resource.ResourceType(ctx)
b := types[ty]
if b == nil {
b = &service.ResourcesByType{Type: ty}
types[ty] = b
}
b.Resources = append(b.Resources, tr.asService(r.Capture))
}
out := &service.Resources{Types: make([]*service.ResourcesByType, 0, len(types))}
for _, v := range types {
out.Types = append(out.Types, v)
}
out.ResourcesToTypes = resourceTypes
return out, nil
}
type trackedResource struct {
resource api.Resource
id id.ID
context *path.Context
name string
accesses []uint64
deleted uint64
created uint64
}
func (r trackedResource) asService(p *path.Capture) *service.Resource {
out := &service.Resource{
ID: path.NewID(r.id),
Context: r.context,
Handle: r.resource.ResourceHandle(),
Label: r.resource.ResourceLabel(),
Order: r.resource.Order(),
Accesses: make([]*path.Command, len(r.accesses)),
}
for i, a := range r.accesses {
out.Accesses[i] = p.Command(a)
}
if r.deleted > 0 {
out.Deleted = p.Command(r.deleted)
}
out.Created = p.Command(r.created)
return out
}
func genResourceID(createdAt uint64, rCount int) id.ID {
return id.OfString(fmt.Sprintf("%d %d", createdAt, rCount))
}