diff options
author | Rob Pike <r@golang.org> | 2010-03-04 15:26:15 -0800 |
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committer | Rob Pike <r@golang.org> | 2010-03-04 15:26:15 -0800 |
commit | a01fc575ba720cf6b6550da08d7675e6ea654652 (patch) | |
tree | 22237592a9b083b9b6cce5d0fde2d6ca60ec3d18 /test/bugs | |
parent | a8440cb877e4edbb1dfe171afc59a27f4d5de369 (diff) | |
download | go-a01fc575ba720cf6b6550da08d7675e6ea654652.tar.gz |
add a test that structures pack. 6g fails.
R=rsc
CC=golang-dev
http://codereview.appspot.com/237041
Diffstat (limited to 'test/bugs')
-rw-r--r-- | test/bugs/bug260.go | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/bugs/bug260.go b/test/bugs/bug260.go new file mode 100644 index 000000000..cbdd14876 --- /dev/null +++ b/test/bugs/bug260.go @@ -0,0 +1,41 @@ +// $G $D/$F.go && $L $F.$A && ./$A.out + +// Test that structures pack densely, according to the alignment of the largest field. + +package main + +import ( + "fmt" + "os" + "strconv" +) + +type T1 struct { x uint8 } +type T2 struct { x uint16 } +type T4 struct { x uint32 } + +func main() { + status := 0 + var b1 [10]T1 + a0, _ := strconv.Btoui64(fmt.Sprintf("%p", &b1[0])[2:], 16) + a1, _ := strconv.Btoui64(fmt.Sprintf("%p", &b1[1])[2:], 16) + if a1 != a0 + 1 { + fmt.Println("FAIL: alignment should be 1, is", a1-a0) + status = 1 + } + var b2 [10]T2 + a0, _ = strconv.Btoui64(fmt.Sprintf("%p", &b2[0])[2:], 16) + a1, _ = strconv.Btoui64(fmt.Sprintf("%p", &b2[1])[2:], 16) + if a1 != a0 + 2 { + fmt.Println("FAIL: alignment should be 2, is", a1-a0) + status = 1 + } + var b4 [10]T4 + a0, _ = strconv.Btoui64(fmt.Sprintf("%p", &b4[0])[2:], 16) + a1, _ = strconv.Btoui64(fmt.Sprintf("%p", &b4[1])[2:], 16) + if a1 != a0 + 4 { + fmt.Println("FAIL: alignment should be 4, is", a1-a0) + status = 1 + } + os.Exit(status) +} |