3b32c2028b
This adds the experimental support of the file system compilation cache. Notably, experimental.WithCompilationCacheDirName allows users to configure where the compiler writes the cache into. Versioning/validation of binary compatibility has been done via the release tag (which will be created from the end of this month). More specifically, the cache file starts with a header with the hardcoded wazero version. Fixes #618 Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io> Co-authored-by: Crypt Keeper <64215+codefromthecrypt@users.noreply.github.com>
57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
package platform
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import (
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"bytes"
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"crypto/rand"
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"io"
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"testing"
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"github.com/tetratelabs/wazero/internal/testing/require"
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)
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var testCodeBuf, _ = io.ReadAll(io.LimitReader(rand.Reader, 8*1024))
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func Test_MmapCodeSegment(t *testing.T) {
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if !CompilerSupported() {
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t.Skip()
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}
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testCodeReader := bytes.NewReader(testCodeBuf)
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newCode, err := MmapCodeSegment(testCodeReader, testCodeReader.Len())
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require.NoError(t, err)
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// Verify that the mmap is the same as the original.
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require.Equal(t, testCodeBuf, newCode)
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// TODO: test newCode can executed.
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t.Run("panic on zero length", func(t *testing.T) {
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captured := require.CapturePanic(func() {
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_, _ = MmapCodeSegment(bytes.NewBuffer(make([]byte, 0)), 0)
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})
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require.EqualError(t, captured, "BUG: MmapCodeSegment with zero length")
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})
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}
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func Test_MunmapCodeSegment(t *testing.T) {
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if !CompilerSupported() {
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t.Skip()
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}
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// Errors if never mapped
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require.Error(t, MunmapCodeSegment(testCodeBuf))
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testCodeReader := bytes.NewReader(testCodeBuf)
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newCode, err := MmapCodeSegment(testCodeReader, testCodeReader.Len())
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require.NoError(t, err)
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// First munmap should succeed.
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require.NoError(t, MunmapCodeSegment(newCode))
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// Double munmap should fail.
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require.Error(t, MunmapCodeSegment(newCode))
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t.Run("panic on zero length", func(t *testing.T) {
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captured := require.CapturePanic(func() {
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_ = MunmapCodeSegment(make([]byte, 0))
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})
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require.EqualError(t, captured, "BUG: MunmapCodeSegment with zero length")
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})
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}
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