pkg/symbolizer/cache.go

// 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 symbolizer

import (
	"sync"
)

type Cache struct {
	mu    sync.RWMutex
	cache map[cacheKey]cacheVal
}

type cacheKey struct {
	bin string
	pc  uint64
}

type cacheVal struct {
	frames []Frame
	err    error
}

func (c *Cache) Symbolize(inner func(string, uint64) ([]Frame, error), bin string, pc uint64) ([]Frame, error) {
	key := cacheKey{bin, pc}
	c.mu.RLock()
	val, ok := c.cache[key]
	c.mu.RUnlock()
	if ok {
		return val.frames, val.err
	}
	frames, err := inner(bin, pc)
	c.mu.Lock()
	c.cache[key] = cacheVal{frames, err}
	c.mu.Unlock()
	return frames, err
}