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cmd/vet: tests for RET checking, SP checking, and leaf functions 

Add tests for recently introduced asm error checks in vet.
This adds tests for the new warnings about functions that
don't store to their return slot before returning or that
store to SP-relative addresses in or beyond the argument
frame.  It also adds a test for leaf function handling on arm,
where the link register is not implicitly saved.

LGTM=rsc
R=rsc
CC=adg, golang-codereviews, r
https://golang.org/cl/166040044
This commit is contained in:
Austin Clements 2014-11-03 17:27:41 -05:00
parent 52f3c4bf8a
commit 348181cdd4
4 changed files with 26 additions and 0 deletions
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2
cmd/vet/testdata/asm.go vendored
View File

@ -22,6 +22,8 @@ func argiface(x interface{}, y interface {
func returnint() int
func returnbyte(x int) byte
func returnnamed(x byte) (r1 int, r2 int16, r3 string, r4 byte)
func returnintmissing() int
func leaf(x, y int) int
func noprof(x int)
func dupok(x int)

6
cmd/vet/testdata/asm1.s vendored
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@ -27,6 +27,9 @@ TEXT ·arg1(SB),0,$0-2
TESTQ y+1(FP), AX // ERROR "invalid TESTQ of y\+1\(FP\); uint8 is 1-byte value"
TESTB x+1(FP), AX // ERROR "invalid offset x\+1\(FP\); expected x\+0\(FP\)"
TESTB y+2(FP), AX // ERROR "invalid offset y\+2\(FP\); expected y\+1\(FP\)"
MOVB 8(SP), AX // ERROR "8\(SP\) should be x\+0\(FP\)"
MOVB 9(SP), AX // ERROR "9\(SP\) should be y\+1\(FP\)"
MOVB 10(SP), AX // ERROR "use of 10\(SP\) points beyond argument frame"
RET
TEXT ·arg2(SB),0,$0-4
@ -246,3 +249,6 @@ TEXT ·returnnamed(SB),0,$0-41
MOVB AX, r4+40(FP)
MOVL AX, r1+8(FP) // ERROR "invalid MOVL of r1\+8\(FP\); int is 8-byte value"
RET
TEXT ·returnintmissing(SB),0,$0-8
RET // ERROR "RET without writing to 8-byte ret\+0\(FP\)"

6
cmd/vet/testdata/asm2.s vendored
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@ -26,6 +26,9 @@ TEXT ·arg1(SB),0,$0-2
TESTQ y+1(FP), AX // ERROR "invalid TESTQ of y\+1\(FP\); uint8 is 1-byte value"
TESTB x+1(FP), AX // ERROR "invalid offset x\+1\(FP\); expected x\+0\(FP\)"
TESTB y+2(FP), AX // ERROR "invalid offset y\+2\(FP\); expected y\+1\(FP\)"
MOVB 4(SP), AX // ERROR "4\(SP\) should be x\+0\(FP\)"
MOVB 5(SP), AX // ERROR "5\(SP\) should be y\+1\(FP\)"
MOVB 6(SP), AX // ERROR "use of 6\(SP\) points beyond argument frame"
RET
TEXT ·arg2(SB),0,$0-4
@ -249,3 +252,6 @@ TEXT ·returnnamed(SB),0,$0-21
MOVB AX, r4+20(FP)
MOVQ AX, r1+4(FP) // ERROR "invalid MOVQ of r1\+4\(FP\); int is 4-byte value"
RET
TEXT ·returnintmissing(SB),0,$0-4
RET // ERROR "RET without writing to 4-byte ret\+0\(FP\)"

12
cmd/vet/testdata/asm3.s vendored
View File

@ -14,6 +14,9 @@ TEXT ·arg1(SB),0,$0-2
MOVW y+1(FP), AX // ERROR "invalid MOVW of y\+1\(FP\); uint8 is 1-byte value"
MOVB x+1(FP), AX // ERROR "invalid offset x\+1\(FP\); expected x\+0\(FP\)"
MOVB y+2(FP), AX // ERROR "invalid offset y\+2\(FP\); expected y\+1\(FP\)"
MOVB 8(R13), AX // ERROR "8\(R13\) should be x\+0\(FP\)"
MOVB 9(R13), AX // ERROR "9\(R13\) should be y\+1\(FP\)"
MOVB 10(R13), AX // ERROR "use of 10\(R13\) points beyond argument frame"
RET
TEXT ·arg2(SB),0,$0-4
@ -164,3 +167,12 @@ TEXT ·returnnamed(SB),0,$0-21
MOVB AX, r4+20(FP)
MOVB AX, r1+4(FP) // ERROR "invalid MOVB of r1\+4\(FP\); int is 4-byte value"
RET
TEXT ·returnintmissing(SB),0,$0-4
RET // ERROR "RET without writing to 4-byte ret\+0\(FP\)"
TEXT ·leaf(SB),0,$-4-12
MOVW x+0(FP), AX
MOVW y+4(FP), AX
MOVW AX, ret+8(FP)
RET