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314ae669a3
The eh_frame section is similar to debug_frame but uses a slightly different format. Gcc and clang by default only emit eh_frame.
77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package frame
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import (
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"encoding/binary"
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"io/ioutil"
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"os"
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"testing"
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"unsafe"
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)
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func ptrSizeByRuntimeArch() int {
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return int(unsafe.Sizeof(uintptr(0)))
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}
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func TestFDEForPC(t *testing.T) {
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frames := newFrameIndex()
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frames = append(frames,
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&FrameDescriptionEntry{begin: 10, size: 40},
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&FrameDescriptionEntry{begin: 50, size: 50},
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&FrameDescriptionEntry{begin: 100, size: 100},
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&FrameDescriptionEntry{begin: 300, size: 10})
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for _, test := range []struct {
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pc uint64
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fde *FrameDescriptionEntry
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}{
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{0, nil},
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{9, nil},
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{10, frames[0]},
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{35, frames[0]},
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{49, frames[0]},
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{50, frames[1]},
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{75, frames[1]},
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{100, frames[2]},
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{199, frames[2]},
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{200, nil},
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{299, nil},
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{300, frames[3]},
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{309, frames[3]},
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{310, nil},
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{400, nil}} {
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out, err := frames.FDEForPC(test.pc)
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if test.fde != nil {
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if err != nil {
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t.Fatal(err)
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}
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if out != test.fde {
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t.Errorf("[pc = %#x] got incorrect fde\noutput:\t%#v\nexpected:\t%#v", test.pc, out, test.fde)
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}
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} else {
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if err == nil {
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t.Errorf("[pc = %#x] expected error got fde %#v", test.pc, out)
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}
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}
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}
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}
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func BenchmarkFDEForPC(b *testing.B) {
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f, err := os.Open("testdata/frame")
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if err != nil {
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b.Fatal(err)
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}
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defer f.Close()
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data, err := ioutil.ReadAll(f)
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if err != nil {
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b.Fatal(err)
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}
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fdes, _ := Parse(data, binary.BigEndian, 0, ptrSizeByRuntimeArch(), 0)
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for i := 0; i < b.N; i++ {
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// bench worst case, exhaustive search
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_, _ = fdes.FDEForPC(0x455555555)
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}
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}
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