diff options
| author | Adin Scannell <ascannell@google.com> | 2019-12-06 16:58:28 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-12-06 17:00:07 -0800 |
| commit | 371e210b83c244d8828ad2fa1b3d7cef15fbf463 (patch) | |
| tree | 6617af43e8182a9784ac5525ac3e9fe5d8543aa0 /pkg/sentry/kernel/task_syscall.go | |
| parent | 3e84777d2e2a2b56c00487cd77aa8d2fc25bbb16 (diff) | |
Add runtime tracing.
This adds meaningful annotations to the trace generated by the runtime/trace
package.
PiperOrigin-RevId: 284290115
Diffstat (limited to 'pkg/sentry/kernel/task_syscall.go')
| -rw-r--r-- | pkg/sentry/kernel/task_syscall.go | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/pkg/sentry/kernel/task_syscall.go b/pkg/sentry/kernel/task_syscall.go index b543d536a..3180f5560 100644 --- a/pkg/sentry/kernel/task_syscall.go +++ b/pkg/sentry/kernel/task_syscall.go @@ -17,6 +17,7 @@ package kernel import ( "fmt" "os" + "runtime/trace" "syscall" "gvisor.dev/gvisor/pkg/abi/linux" @@ -160,6 +161,10 @@ func (t *Task) executeSyscall(sysno uintptr, args arch.SyscallArguments) (rval u ctrl = ctrlStopAndReinvokeSyscall } else { fn := s.Lookup(sysno) + var region *trace.Region // Only non-nil if tracing == true. + if trace.IsEnabled() { + region = trace.StartRegion(t.traceContext, s.LookupName(sysno)) + } if fn != nil { // Call our syscall implementation. rval, ctrl, err = fn(t, args) @@ -167,6 +172,9 @@ func (t *Task) executeSyscall(sysno uintptr, args arch.SyscallArguments) (rval u // Use the missing function if not found. rval, err = t.SyscallTable().Missing(t, sysno, args) } + if region != nil { + region.End() + } } if bits.IsOn32(fe, ExternalAfterEnable) && (s.ExternalFilterAfter == nil || s.ExternalFilterAfter(t, sysno, args)) { |