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sync/atomic: specify argsize for asm routines

Browse Source 
Fixes #6098.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12717043
This commit is contained in:
Dmitriy Vyukov 2013-08-12 21:46:33 +04:00
parent a07218385c
commit f3c1070fa4
7 changed files with 103 additions and 66 deletions
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46
src/pkg/sync/atomic/asm_386.s
View File

@ -6,10 +6,10 @@
#include "../../../cmd/ld/textflag.h"
TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0-13
JMP ·CompareAndSwapUint32(SB)
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0-13
MOVL addr+0(FP), BP
MOVL old+4(FP), AX
MOVL new+8(FP), CX
@ -19,16 +19,16 @@ TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
SETEQ swapped+12(FP)
RET
TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0-13
JMP ·CompareAndSwapUint32(SB)
TEXT ·CompareAndSwapPointer(SB),NOSPLIT,$0
TEXT ·CompareAndSwapPointer(SB),NOSPLIT,$0-13
JMP ·CompareAndSwapUint32(SB)
TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0-21
JMP ·CompareAndSwapUint64(SB)
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0-21
MOVL addr+0(FP), BP
TESTL $7, BP
JZ 2(PC)
@ -43,10 +43,10 @@ TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0
SETEQ swapped+20(FP)
RET
TEXT ·AddInt32(SB),NOSPLIT,$0
TEXT ·AddInt32(SB),NOSPLIT,$0-12
JMP ·AddUint32(SB)
TEXT ·AddUint32(SB),NOSPLIT,$0
TEXT ·AddUint32(SB),NOSPLIT,$0-12
MOVL addr+0(FP), BP
MOVL delta+4(FP), AX
MOVL AX, CX
@ -57,13 +57,13 @@ TEXT ·AddUint32(SB),NOSPLIT,$0
MOVL CX, new+8(FP)
RET
TEXT ·AddUintptr(SB),NOSPLIT,$0
TEXT ·AddUintptr(SB),NOSPLIT,$0-12
JMP ·AddUint32(SB)
TEXT ·AddInt64(SB),NOSPLIT,$0
TEXT ·AddInt64(SB),NOSPLIT,$0-20
JMP ·AddUint64(SB)
TEXT ·AddUint64(SB),NOSPLIT,$0
TEXT ·AddUint64(SB),NOSPLIT,$0-20
// no XADDQ so use CMPXCHG8B loop
MOVL addr+0(FP), BP
TESTL $7, BP
@ -99,19 +99,19 @@ addloop:
MOVL CX, new_hi+16(FP)
RET
TEXT ·LoadInt32(SB),NOSPLIT,$0
TEXT ·LoadInt32(SB),NOSPLIT,$0-8
JMP ·LoadUint32(SB)
TEXT ·LoadUint32(SB),NOSPLIT,$0
TEXT ·LoadUint32(SB),NOSPLIT,$0-8
MOVL addr+0(FP), AX
MOVL 0(AX), AX
MOVL AX, val+4(FP)
RET
TEXT ·LoadInt64(SB),NOSPLIT,$0
TEXT ·LoadInt64(SB),NOSPLIT,$0-16
JMP ·LoadUint64(SB)
TEXT ·LoadUint64(SB),NOSPLIT,$0
TEXT ·LoadUint64(SB),NOSPLIT,$0-16
MOVL addr+0(FP), AX
TESTL $7, AX
JZ 2(PC)
@ -124,25 +124,25 @@ TEXT ·LoadUint64(SB),NOSPLIT,$0
EMMS
RET
TEXT ·LoadUintptr(SB),NOSPLIT,$0
TEXT ·LoadUintptr(SB),NOSPLIT,$0-8
JMP ·LoadUint32(SB)
TEXT ·LoadPointer(SB),NOSPLIT,$0
TEXT ·LoadPointer(SB),NOSPLIT,$0-8
JMP ·LoadUint32(SB)
TEXT ·StoreInt32(SB),NOSPLIT,$0
TEXT ·StoreInt32(SB),NOSPLIT,$0-8
JMP ·StoreUint32(SB)
TEXT ·StoreUint32(SB),NOSPLIT,$0
TEXT ·StoreUint32(SB),NOSPLIT,$0-8
MOVL addr+0(FP), BP
MOVL val+4(FP), AX
XCHGL AX, 0(BP)
RET
TEXT ·StoreInt64(SB),NOSPLIT,$0
TEXT ·StoreInt64(SB),NOSPLIT,$0-16
JMP ·StoreUint64(SB)
TEXT ·StoreUint64(SB),NOSPLIT,$0
TEXT ·StoreUint64(SB),NOSPLIT,$0-16
MOVL addr+0(FP), AX
TESTL $7, AX
JZ 2(PC)
@ -160,8 +160,8 @@ TEXT ·StoreUint64(SB),NOSPLIT,$0
XADDL AX, (SP)
RET
TEXT ·StoreUintptr(SB),NOSPLIT,$0
TEXT ·StoreUintptr(SB),NOSPLIT,$0-8
JMP ·StoreUint32(SB)
TEXT ·StorePointer(SB),NOSPLIT,$0
TEXT ·StorePointer(SB),NOSPLIT,$0-8
JMP ·StoreUint32(SB)

46
src/pkg/sync/atomic/asm_amd64.s
View File

@ -6,10 +6,10 @@
#include "../../../cmd/ld/textflag.h"
TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0-17
JMP ·CompareAndSwapUint32(SB)
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0-17
MOVQ addr+0(FP), BP
MOVL old+8(FP), AX
MOVL new+12(FP), CX
@ -18,16 +18,16 @@ TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
SETEQ swapped+16(FP)
RET
TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0-25
JMP ·CompareAndSwapUint64(SB)
TEXT ·CompareAndSwapPointer(SB),NOSPLIT,$0
TEXT ·CompareAndSwapPointer(SB),NOSPLIT,$0-25
JMP ·CompareAndSwapUint64(SB)
TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0-25
JMP ·CompareAndSwapUint64(SB)
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0-25
MOVQ addr+0(FP), BP
MOVQ old+8(FP), AX
MOVQ new+16(FP), CX
@ -36,10 +36,10 @@ TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0
SETEQ swapped+24(FP)
RET
TEXT ·AddInt32(SB),NOSPLIT,$0
TEXT ·AddInt32(SB),NOSPLIT,$0-20
JMP ·AddUint32(SB)
TEXT ·AddUint32(SB),NOSPLIT,$0
TEXT ·AddUint32(SB),NOSPLIT,$0-20
MOVQ addr+0(FP), BP
MOVL delta+8(FP), AX
MOVL AX, CX
@ -49,13 +49,13 @@ TEXT ·AddUint32(SB),NOSPLIT,$0
MOVL CX, new+16(FP)
RET
TEXT ·AddUintptr(SB),NOSPLIT,$0
TEXT ·AddUintptr(SB),NOSPLIT,$0-24
JMP ·AddUint64(SB)
TEXT ·AddInt64(SB),NOSPLIT,$0
TEXT ·AddInt64(SB),NOSPLIT,$0-24
JMP ·AddUint64(SB)
TEXT ·AddUint64(SB),NOSPLIT,$0
TEXT ·AddUint64(SB),NOSPLIT,$0-24
MOVQ addr+0(FP), BP
MOVQ delta+8(FP), AX
MOVQ AX, CX
@ -65,55 +65,55 @@ TEXT ·AddUint64(SB),NOSPLIT,$0
MOVQ CX, new+16(FP)
RET
TEXT ·LoadInt32(SB),NOSPLIT,$0
TEXT ·LoadInt32(SB),NOSPLIT,$0-12
JMP ·LoadUint32(SB)
TEXT ·LoadUint32(SB),NOSPLIT,$0
TEXT ·LoadUint32(SB),NOSPLIT,$0-12
MOVQ addr+0(FP), AX
MOVL 0(AX), AX
MOVL AX, val+8(FP)
RET
TEXT ·LoadInt64(SB),NOSPLIT,$0
TEXT ·LoadInt64(SB),NOSPLIT,$0-16
JMP ·LoadUint64(SB)
TEXT ·LoadUint64(SB),NOSPLIT,$0
TEXT ·LoadUint64(SB),NOSPLIT,$0-16
MOVQ addr+0(FP), AX
MOVQ 0(AX), AX
MOVQ AX, val+8(FP)
RET
TEXT ·LoadUintptr(SB),NOSPLIT,$0
TEXT ·LoadUintptr(SB),NOSPLIT,$0-16
JMP ·LoadPointer(SB)
TEXT ·LoadPointer(SB),NOSPLIT,$0
TEXT ·LoadPointer(SB),NOSPLIT,$0-16
MOVQ addr+0(FP), AX
MOVQ 0(AX), AX
MOVQ AX, val+8(FP)
RET
TEXT ·StoreInt32(SB),NOSPLIT,$0
TEXT ·StoreInt32(SB),NOSPLIT,$0-12
JMP ·StoreUint32(SB)
TEXT ·StoreUint32(SB),NOSPLIT,$0
TEXT ·StoreUint32(SB),NOSPLIT,$0-12
MOVQ addr+0(FP), BP
MOVL val+8(FP), AX
XCHGL AX, 0(BP)
RET
TEXT ·StoreInt64(SB),NOSPLIT,$0
TEXT ·StoreInt64(SB),NOSPLIT,$0-16
JMP ·StoreUint64(SB)
TEXT ·StoreUint64(SB),NOSPLIT,$0
TEXT ·StoreUint64(SB),NOSPLIT,$0-16
MOVQ addr+0(FP), BP
MOVQ val+8(FP), AX
XCHGQ AX, 0(BP)
RET
TEXT ·StoreUintptr(SB),NOSPLIT,$0
TEXT ·StoreUintptr(SB),NOSPLIT,$0-16
JMP ·StorePointer(SB)
TEXT ·StorePointer(SB),NOSPLIT,$0
TEXT ·StorePointer(SB),NOSPLIT,$0-16
MOVQ addr+0(FP), BP
MOVQ val+8(FP), AX
XCHGQ AX, 0(BP)

16
src/pkg/sync/atomic/asm_arm.s
View File

@ -8,7 +8,7 @@
// ARM atomic operations, for use by asm_$(GOOS)_arm.s.
TEXT ·armCompareAndSwapUint32(SB),NOSPLIT,$0
TEXT ·armCompareAndSwapUint32(SB),NOSPLIT,$0-13
MOVW addr+0(FP), R1
MOVW old+4(FP), R2
MOVW new+8(FP), R3
@ -28,7 +28,7 @@ casfail:
MOVBU R0, ret+12(FP)
RET
TEXT ·armCompareAndSwapUint64(SB),NOSPLIT,$0
TEXT ·armCompareAndSwapUint64(SB),NOSPLIT,$0-21
BL fastCheck64<>(SB)
MOVW addr+0(FP), R1
// make unaligned atomic access panic
@ -57,7 +57,7 @@ cas64fail:
MOVBU R0, ret+20(FP)
RET
TEXT ·armAddUint32(SB),NOSPLIT,$0
TEXT ·armAddUint32(SB),NOSPLIT,$0-12
MOVW addr+0(FP), R1
MOVW delta+4(FP), R2
addloop:
@ -70,7 +70,7 @@ addloop:
MOVW R3, ret+8(FP)
RET
TEXT ·armAddUint64(SB),NOSPLIT,$0
TEXT ·armAddUint64(SB),NOSPLIT,$0-20
BL fastCheck64<>(SB)
MOVW addr+0(FP), R1
// make unaligned atomic access panic
@ -91,7 +91,7 @@ add64loop:
MOVW R5, rethi+16(FP)
RET
TEXT ·armLoadUint64(SB),NOSPLIT,$0
TEXT ·armLoadUint64(SB),NOSPLIT,$0-12
BL fastCheck64<>(SB)
MOVW addr+0(FP), R1
// make unaligned atomic access panic
@ -107,7 +107,7 @@ load64loop:
MOVW R3, valhi+8(FP)
RET
TEXT ·armStoreUint64(SB),NOSPLIT,$0
TEXT ·armStoreUint64(SB),NOSPLIT,$0-12
BL fastCheck64<>(SB)
MOVW addr+0(FP), R1
// make unaligned atomic access panic
@ -131,7 +131,7 @@ store64loop:
// which will make uses of the 64-bit atomic operations loop forever.
// If things are working, set okLDREXD to avoid future checks.
// https://bugs.launchpad.net/qemu/+bug/670883.
TEXT check64<>(SB),NOSPLIT,$16
TEXT check64<>(SB),NOSPLIT,$16-0
MOVW $10, R1
// 8-aligned stack address scratch space.
MOVW $8(R13), R5
@ -156,7 +156,7 @@ TEXT fastCheck64<>(SB),NOSPLIT,$-4
RET.NE
B slowCheck64<>(SB)
TEXT slowCheck64<>(SB),NOSPLIT,$0
TEXT slowCheck64<>(SB),NOSPLIT,$0-0
BL check64<>(SB)
// Still here, must be okay.
MOVW $1, R0

4
src/pkg/sync/atomic/asm_freebsd_arm.s
View File

@ -43,7 +43,7 @@ TEXT ·AddUint64(SB),NOSPLIT,$0
TEXT ·LoadInt32(SB),NOSPLIT,$0
B ·LoadUint32(SB)
TEXT ·LoadUint32(SB),NOSPLIT,$0
TEXT ·LoadUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R1
load32loop:
LDREX (R1), R2 // loads R2
@ -68,7 +68,7 @@ TEXT ·LoadPointer(SB),NOSPLIT,$0
TEXT ·StoreInt32(SB),NOSPLIT,$0
B ·StoreUint32(SB)
TEXT ·StoreUint32(SB),NOSPLIT,$0
TEXT ·StoreUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R1
MOVW val+4(FP), R2
storeloop:

16
src/pkg/sync/atomic/asm_linux_arm.s
View File

@ -30,7 +30,7 @@ TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
B ·CompareAndSwapUint32(SB)
// Implement using kernel cas for portability.
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0-13
MOVW addr+0(FP), R2
MOVW old+4(FP), R0
casagain:
@ -61,7 +61,7 @@ TEXT ·AddInt32(SB),NOSPLIT,$0
B ·AddUint32(SB)
// Implement using kernel cas for portability.
TEXT ·AddUint32(SB),NOSPLIT,$0
TEXT ·AddUint32(SB),NOSPLIT,$0-12
MOVW addr+0(FP), R2
MOVW delta+4(FP), R4
addloop1:
@ -79,7 +79,7 @@ TEXT ·AddUintptr(SB),NOSPLIT,$0
TEXT cas64<>(SB),NOSPLIT,$0
MOVW $0xffff0f60, PC // __kuser_cmpxchg64: Linux-3.1 and above
TEXT kernelCAS64<>(SB),NOSPLIT,$0
TEXT kernelCAS64<>(SB),NOSPLIT,$0-21
// int (*__kuser_cmpxchg64_t)(const int64_t *oldval, const int64_t *newval, volatile int64_t *ptr);
MOVW addr+0(FP), R2 // ptr
// make unaligned atomic access panic
@ -94,7 +94,7 @@ TEXT kernelCAS64<>(SB),NOSPLIT,$0
MOVW R0, 20(FP)
RET
TEXT generalCAS64<>(SB),NOSPLIT,$20
TEXT generalCAS64<>(SB),NOSPLIT,$20-21
// bool runtime·cas64(uint64 volatile *addr, uint64 *old, uint64 new)
MOVW addr+0(FP), R0
// make unaligned atomic access panic
@ -114,7 +114,7 @@ TEXT generalCAS64<>(SB),NOSPLIT,$20
GLOBL armCAS64(SB), $4
TEXT setupAndCallCAS64<>(SB),NOSPLIT,$-4
TEXT setupAndCallCAS64<>(SB),NOSPLIT,$-21
MOVW $0xffff0ffc, R0 // __kuser_helper_version
MOVW (R0), R0
// __kuser_cmpxchg64 only present if helper version >= 5
@ -136,7 +136,7 @@ TEXT setupAndCallCAS64<>(SB),NOSPLIT,$-4
TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
B ·CompareAndSwapUint64(SB)
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$-4
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$-21
MOVW armCAS64(SB), R0
CMP $0, R0
MOVW.NE R0, PC
@ -151,7 +151,7 @@ TEXT ·AddUint64(SB),NOSPLIT,$0
TEXT ·LoadInt32(SB),NOSPLIT,$0
B ·LoadUint32(SB)
TEXT ·LoadUint32(SB),NOSPLIT,$0
TEXT ·LoadUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R2
loadloop1:
MOVW 0(R2), R0
@ -176,7 +176,7 @@ TEXT ·LoadPointer(SB),NOSPLIT,$0
TEXT ·StoreInt32(SB),NOSPLIT,$0
B ·StoreUint32(SB)
TEXT ·StoreUint32(SB),NOSPLIT,$0
TEXT ·StoreUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R2
MOVW val+4(FP), R1
storeloop1:

4
src/pkg/sync/atomic/asm_netbsd_arm.s
View File

@ -43,7 +43,7 @@ TEXT ·AddUint64(SB),NOSPLIT,$0
TEXT ·LoadInt32(SB),NOSPLIT,$0
B ·LoadUint32(SB)
TEXT ·LoadUint32(SB),NOSPLIT,$0
TEXT ·LoadUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R1
load32loop:
LDREX (R1), R2 // loads R2
@ -68,7 +68,7 @@ TEXT ·LoadPointer(SB),NOSPLIT,$0
TEXT ·StoreInt32(SB),NOSPLIT,$0
B ·StoreUint32(SB)
TEXT ·StoreUint32(SB),NOSPLIT,$0
TEXT ·StoreUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R1
MOVW val+4(FP), R2
storeloop:

37
src/pkg/sync/atomic/atomic_test.go
View File

@ -1203,3 +1203,40 @@ func TestUnaligned64(t *testing.T) {
shouldPanic(t, "CompareAndSwapUint64", func() { CompareAndSwapUint64(p, 1, 2) })
shouldPanic(t, "AddUint64", func() { AddUint64(p, 3) })
}
func TestNilDeref(t *testing.T) {
funcs := [...]func(){
func() { CompareAndSwapInt32(nil, 0, 0) },
func() { CompareAndSwapInt64(nil, 0, 0) },
func() { CompareAndSwapUint32(nil, 0, 0) },
func() { CompareAndSwapUint64(nil, 0, 0) },
func() { CompareAndSwapUintptr(nil, 0, 0) },
func() { CompareAndSwapPointer(nil, nil, nil) },
func() { AddInt32(nil, 0) },
func() { AddUint32(nil, 0) },
func() { AddInt64(nil, 0) },
func() { AddUint64(nil, 0) },
func() { AddUintptr(nil, 0) },
func() { LoadInt32(nil) },
func() { LoadInt64(nil) },
func() { LoadUint32(nil) },
func() { LoadUint64(nil) },
func() { LoadUintptr(nil) },
func() { LoadPointer(nil) },
func() { StoreInt32(nil, 0) },
func() { StoreInt64(nil, 0) },
func() { StoreUint32(nil, 0) },
func() { StoreUint64(nil, 0) },
func() { StoreUintptr(nil, 0) },
func() { StorePointer(nil, nil) },
}
for _, f := range funcs {
func() {
defer func() {
runtime.GC()
recover()
}()
f()
}()
}
}