162 lines
4.7 KiB
Diff
162 lines
4.7 KiB
Diff
From e44f456f1d0e429e08afed64a161175ff493f3ac Mon Sep 17 00:00:00 2001
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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
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Date: Wed, 27 Feb 2019 05:05:44 +0100
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Subject: [PATCH] runtime: use CLOCK_BOOTTIME in nanotime on Linux
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This makes timers account for having expired while a computer was
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asleep, which is quite common on mobile devices. Note that BOOTTIME is
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identical to MONOTONIC, except that it takes into account time spent
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in suspend. In Linux 4.17, the kernel will actually make MONOTONIC act
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like BOOTTIME anyway, so this switch will additionally unify the
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timer behavior across kernels.
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BOOTTIME was introduced into Linux 2.6.39-rc1 with 70a08cca1227d in
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2011.
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Fixes #24595
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Change-Id: I7b2a6ca0c5bc5fce57ec0eeafe7b68270b429321
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---
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src/runtime/sys_linux_386.s | 4 ++--
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src/runtime/sys_linux_amd64.s | 2 +-
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src/runtime/sys_linux_arm.s | 4 ++--
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src/runtime/sys_linux_arm64.s | 4 ++--
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src/runtime/sys_linux_mips64x.s | 2 +-
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src/runtime/sys_linux_mipsx.s | 2 +-
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src/runtime/sys_linux_ppc64x.s | 2 +-
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src/runtime/sys_linux_s390x.s | 2 +-
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8 files changed, 11 insertions(+), 11 deletions(-)
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diff --git a/src/runtime/sys_linux_386.s b/src/runtime/sys_linux_386.s
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index 1b28098ad9..46b7071ed8 100644
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--- a/src/runtime/sys_linux_386.s
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+++ b/src/runtime/sys_linux_386.s
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@@ -317,13 +317,13 @@ noswitch:
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LEAL 8(SP), BX // &ts (struct timespec)
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MOVL BX, 4(SP)
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- MOVL $1, 0(SP) // CLOCK_MONOTONIC
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+ MOVL $7, 0(SP) // CLOCK_BOOTTIME
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CALL AX
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JMP finish
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fallback:
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MOVL $SYS_clock_gettime, AX
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- MOVL $1, BX // CLOCK_MONOTONIC
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+ MOVL $7, BX // CLOCK_BOOTTIME
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LEAL 8(SP), CX
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INVOKE_SYSCALL
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diff --git a/src/runtime/sys_linux_amd64.s b/src/runtime/sys_linux_amd64.s
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index 58d3bc54b4..4bb9bde3d0 100644
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--- a/src/runtime/sys_linux_amd64.s
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+++ b/src/runtime/sys_linux_amd64.s
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@@ -293,7 +293,7 @@ noswitch:
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MOVQ runtime·vdsoClockgettimeSym(SB), AX
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CMPQ AX, $0
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JEQ fallback
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- MOVL $1, DI // CLOCK_MONOTONIC
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+ MOVL $7, DI // CLOCK_BOOTTIME
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LEAQ 0(SP), SI
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CALL AX
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MOVQ 0(SP), AX // sec
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diff --git a/src/runtime/sys_linux_arm.s b/src/runtime/sys_linux_arm.s
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index e103da56dc..0b872b90a6 100644
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--- a/src/runtime/sys_linux_arm.s
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+++ b/src/runtime/sys_linux_arm.s
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@@ -11,7 +11,7 @@
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#include "textflag.h"
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#define CLOCK_REALTIME 0
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-#define CLOCK_MONOTONIC 1
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+#define CLOCK_BOOTTIME 7
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// for EABI, as we don't support OABI
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#define SYS_BASE 0x0
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@@ -345,7 +345,7 @@ noswitch:
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SUB $24, R13 // Space for results
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BIC $0x7, R13 // Align for C code
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- MOVW $CLOCK_MONOTONIC, R0
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+ MOVW $CLOCK_BOOTTIME, R0
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MOVW $8(R13), R1 // timespec
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MOVW runtime·vdsoClockgettimeSym(SB), R2
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CMP $0, R2
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diff --git a/src/runtime/sys_linux_arm64.s b/src/runtime/sys_linux_arm64.s
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index b9588cec30..e444d50df4 100644
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--- a/src/runtime/sys_linux_arm64.s
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+++ b/src/runtime/sys_linux_arm64.s
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@@ -13,7 +13,7 @@
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#define AT_FDCWD -100
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#define CLOCK_REALTIME 0
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-#define CLOCK_MONOTONIC 1
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+#define CLOCK_BOOTTIME 7
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#define SYS_exit 93
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#define SYS_read 63
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@@ -297,7 +297,7 @@ noswitch:
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BIC $15, R1
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MOVD R1, RSP
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- MOVW $CLOCK_MONOTONIC, R0
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+ MOVW $CLOCK_BOOTTIME, R0
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MOVD runtime·vdsoClockgettimeSym(SB), R2
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CBZ R2, fallback
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diff --git a/src/runtime/sys_linux_mips64x.s b/src/runtime/sys_linux_mips64x.s
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index 723cfe43d9..edd7a195eb 100644
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--- a/src/runtime/sys_linux_mips64x.s
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+++ b/src/runtime/sys_linux_mips64x.s
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@@ -278,7 +278,7 @@ noswitch:
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AND $~15, R1 // Align for C code
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MOVV R1, R29
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- MOVW $1, R4 // CLOCK_MONOTONIC
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+ MOVW $7, R4 // CLOCK_BOOTTIME
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MOVV $0(R29), R5
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MOVV runtime·vdsoClockgettimeSym(SB), R25
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diff --git a/src/runtime/sys_linux_mipsx.s b/src/runtime/sys_linux_mipsx.s
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index 15893a7a28..f3edf9a83a 100644
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--- a/src/runtime/sys_linux_mipsx.s
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+++ b/src/runtime/sys_linux_mipsx.s
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@@ -235,7 +235,7 @@ TEXT runtime·walltime1(SB),NOSPLIT,$8-12
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RET
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TEXT runtime·nanotime1(SB),NOSPLIT,$8-8
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- MOVW $1, R4 // CLOCK_MONOTONIC
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+ MOVW $7, R4 // CLOCK_BOOTTIME
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MOVW $4(R29), R5
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MOVW $SYS_clock_gettime, R2
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SYSCALL
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diff --git a/src/runtime/sys_linux_ppc64x.s b/src/runtime/sys_linux_ppc64x.s
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index 8629fe3233..2402e2623a 100644
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--- a/src/runtime/sys_linux_ppc64x.s
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+++ b/src/runtime/sys_linux_ppc64x.s
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@@ -233,7 +233,7 @@ fallback:
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JMP finish
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TEXT runtime·nanotime1(SB),NOSPLIT,$16
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- MOVD $1, R3 // CLOCK_MONOTONIC
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+ MOVD $7, R3 // CLOCK_BOOTTIME
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MOVD R1, R15 // R15 is unchanged by C code
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MOVD g_m(g), R21 // R21 = m
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diff --git a/src/runtime/sys_linux_s390x.s b/src/runtime/sys_linux_s390x.s
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index c15a1d5364..f52c4d5098 100644
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--- a/src/runtime/sys_linux_s390x.s
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+++ b/src/runtime/sys_linux_s390x.s
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@@ -207,7 +207,7 @@ TEXT runtime·walltime1(SB),NOSPLIT,$16
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RET
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TEXT runtime·nanotime1(SB),NOSPLIT,$16
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- MOVW $1, R2 // CLOCK_MONOTONIC
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+ MOVW $7, R2 // CLOCK_BOOTTIME
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MOVD $tp-16(SP), R3
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MOVW $SYS_clock_gettime, R1
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SYSCALL
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--
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2.25.1
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