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authorgVisor bot <gvisor-bot@google.com>2019-06-10 22:55:32 +0000
committergVisor bot <gvisor-bot@google.com>2019-06-10 22:55:32 +0000
commit857005f70793d553203f303c834368694adc8b8f (patch)
tree18dfd06743d104b786df6dfd9d67a059d1c7e5fa /pkg/procid
parent8390a8227b571e82c42e3e90aa28a7b86f7e3f9b (diff)
parent589f36ac4ae31b1f7f35a74d982398e48c28aa31 (diff)
Merge 589f36ac (automated)
Diffstat (limited to 'pkg/procid')
-rw-r--r--pkg/procid/procid.go21
-rw-r--r--pkg/procid/procid_amd64.s30
-rw-r--r--pkg/procid/procid_arm64.s29
-rwxr-xr-xpkg/procid/procid_state_autogen.go4
4 files changed, 84 insertions, 0 deletions
diff --git a/pkg/procid/procid.go b/pkg/procid/procid.go
new file mode 100644
index 000000000..78b92422c
--- /dev/null
+++ b/pkg/procid/procid.go
@@ -0,0 +1,21 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package procid provides a way to get the current system thread identifier.
+package procid
+
+// Current returns the current system thread identifier.
+//
+// Precondition: This should only be called with the runtime OS thread locked.
+func Current() uint64
diff --git a/pkg/procid/procid_amd64.s b/pkg/procid/procid_amd64.s
new file mode 100644
index 000000000..30ec8e6e2
--- /dev/null
+++ b/pkg/procid/procid_amd64.s
@@ -0,0 +1,30 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build amd64
+// +build go1.8
+// +build !go1.14
+
+#include "textflag.h"
+
+TEXT ·Current(SB),NOSPLIT,$0-8
+ // The offset specified here is the m_procid offset for Go1.8+.
+ // Changes to this offset should be caught by the tests, and major
+ // version changes require an explicit tag change above.
+ MOVQ TLS, AX
+ MOVQ 0(AX)(TLS*1), AX
+ MOVQ 48(AX), AX // g_m (may change in future versions)
+ MOVQ 72(AX), AX // m_procid (may change in future versions)
+ MOVQ AX, ret+0(FP)
+ RET
diff --git a/pkg/procid/procid_arm64.s b/pkg/procid/procid_arm64.s
new file mode 100644
index 000000000..e340d9f98
--- /dev/null
+++ b/pkg/procid/procid_arm64.s
@@ -0,0 +1,29 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build arm64
+// +build go1.8
+// +build !go1.14
+
+#include "textflag.h"
+
+TEXT ·Current(SB),NOSPLIT,$0-8
+ // The offset specified here is the m_procid offset for Go1.8+.
+ // Changes to this offset should be caught by the tests, and major
+ // version changes require an explicit tag change above.
+ MOVD g, R0 // g
+ MOVD 48(R0), R0 // g_m (may change in future versions)
+ MOVD 72(R0), R0 // m_procid (may change in future versions)
+ MOVD R0, ret+0(FP)
+ RET
diff --git a/pkg/procid/procid_state_autogen.go b/pkg/procid/procid_state_autogen.go
new file mode 100755
index 000000000..f27a7c510
--- /dev/null
+++ b/pkg/procid/procid_state_autogen.go
@@ -0,0 +1,4 @@
+// automatically generated by stateify.
+
+package procid
+