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-rw-r--r--pkg/abi/flag.go9
-rw-r--r--pkg/sentry/strace/BUILD1
-rw-r--r--pkg/sentry/strace/linux64.go20
-rw-r--r--pkg/sentry/strace/signal.go86
-rw-r--r--pkg/sentry/strace/strace.go8
-rw-r--r--pkg/sentry/strace/syscalls.go12
6 files changed, 126 insertions, 10 deletions
diff --git a/pkg/abi/flag.go b/pkg/abi/flag.go
index 049c1b0dd..ec87c9cee 100644
--- a/pkg/abi/flag.go
+++ b/pkg/abi/flag.go
@@ -59,6 +59,15 @@ func (s ValueSet) Parse(val uint64) string {
return fmt.Sprintf("%#x", val)
}
+// ParseDecimal returns the name of the value associated with `val`. Unknown
+// values are converted to decimal.
+func (s ValueSet) ParseDecimal(val uint64) string {
+ if v, ok := s[val]; ok {
+ return v
+ }
+ return fmt.Sprintf("%d", val)
+}
+
// ParseName returns the flag value associated with 'name'. Returns false
// if no value is found.
func (s ValueSet) ParseName(name string) (uint64, bool) {
diff --git a/pkg/sentry/strace/BUILD b/pkg/sentry/strace/BUILD
index 52c7f325c..8517db1ac 100644
--- a/pkg/sentry/strace/BUILD
+++ b/pkg/sentry/strace/BUILD
@@ -11,6 +11,7 @@ go_library(
"linux64.go",
"open.go",
"ptrace.go",
+ "signal.go",
"socket.go",
"strace.go",
"syscalls.go",
diff --git a/pkg/sentry/strace/linux64.go b/pkg/sentry/strace/linux64.go
index 99714f12c..a2ca1a456 100644
--- a/pkg/sentry/strace/linux64.go
+++ b/pkg/sentry/strace/linux64.go
@@ -30,8 +30,8 @@ var linuxAMD64 = SyscallMap{
10: makeSyscallInfo("mprotect", Hex, Hex, Hex),
11: makeSyscallInfo("munmap", Hex, Hex),
12: makeSyscallInfo("brk", Hex),
- 13: makeSyscallInfo("rt_sigaction", Hex, Hex, Hex),
- 14: makeSyscallInfo("rt_sigprocmask", Hex, Hex, Hex, Hex),
+ 13: makeSyscallInfo("rt_sigaction", Signal, Hex, Hex),
+ 14: makeSyscallInfo("rt_sigprocmask", SignalMaskAction, SigSet, PostSigSet, Hex),
15: makeSyscallInfo("rt_sigreturn"),
16: makeSyscallInfo("ioctl", Hex, Hex, Hex),
17: makeSyscallInfo("pread64", Hex, ReadBuffer, Hex, Hex),
@@ -79,7 +79,7 @@ var linuxAMD64 = SyscallMap{
59: makeSyscallInfo("execve", Path, ExecveStringVector, ExecveStringVector),
60: makeSyscallInfo("exit", Hex),
61: makeSyscallInfo("wait4", Hex, Hex, Hex, Rusage),
- 62: makeSyscallInfo("kill", Hex, Hex),
+ 62: makeSyscallInfo("kill", Hex, Signal),
63: makeSyscallInfo("uname", Uname),
64: makeSyscallInfo("semget", Hex, Hex, Hex),
65: makeSyscallInfo("semop", Hex, Hex, Hex),
@@ -145,8 +145,8 @@ var linuxAMD64 = SyscallMap{
125: makeSyscallInfo("capget", Hex, Hex),
126: makeSyscallInfo("capset", Hex, Hex),
127: makeSyscallInfo("rt_sigpending", Hex),
- 128: makeSyscallInfo("rt_sigtimedwait", Hex, Hex, Timespec, Hex),
- 129: makeSyscallInfo("rt_sigqueueinfo", Hex, Hex, Hex),
+ 128: makeSyscallInfo("rt_sigtimedwait", SigSet, Hex, Timespec, Hex),
+ 129: makeSyscallInfo("rt_sigqueueinfo", Hex, Signal, Hex),
130: makeSyscallInfo("rt_sigsuspend", Hex),
131: makeSyscallInfo("sigaltstack", Hex, Hex),
132: makeSyscallInfo("utime", Path, Utimbuf),
@@ -217,7 +217,7 @@ var linuxAMD64 = SyscallMap{
197: makeSyscallInfo("removexattr", Path, Path),
198: makeSyscallInfo("lremovexattr", Path, Path),
199: makeSyscallInfo("fremovexattr", Hex, Path),
- 200: makeSyscallInfo("tkill", Hex, Hex),
+ 200: makeSyscallInfo("tkill", Hex, Signal),
201: makeSyscallInfo("time", Hex),
202: makeSyscallInfo("futex", Hex, FutexOp, Hex, Timespec, Hex, Hex),
203: makeSyscallInfo("sched_setaffinity", Hex, Hex, Hex),
@@ -251,7 +251,7 @@ var linuxAMD64 = SyscallMap{
231: makeSyscallInfo("exit_group", Hex),
232: makeSyscallInfo("epoll_wait", Hex, Hex, Hex, Hex),
233: makeSyscallInfo("epoll_ctl", Hex, Hex, Hex, Hex),
- 234: makeSyscallInfo("tgkill", Hex, Hex, Hex),
+ 234: makeSyscallInfo("tgkill", Hex, Hex, Signal),
235: makeSyscallInfo("utimes", Path, Timeval),
// 236: vserver (not implemented in the Linux kernel)
237: makeSyscallInfo("mbind", Hex, Hex, Hex, Hex, Hex, Hex),
@@ -288,7 +288,7 @@ var linuxAMD64 = SyscallMap{
268: makeSyscallInfo("fchmodat", Hex, Path, Mode),
269: makeSyscallInfo("faccessat", Hex, Path, Oct, Hex),
270: makeSyscallInfo("pselect6", Hex, Hex, Hex, Hex, Hex, Hex),
- 271: makeSyscallInfo("ppoll", Hex, Hex, Timespec, Hex, Hex),
+ 271: makeSyscallInfo("ppoll", Hex, Hex, Timespec, SigSet, Hex),
272: makeSyscallInfo("unshare", Hex),
273: makeSyscallInfo("set_robust_list", Hex, Hex),
274: makeSyscallInfo("get_robust_list", Hex, Hex, Hex),
@@ -298,7 +298,7 @@ var linuxAMD64 = SyscallMap{
278: makeSyscallInfo("vmsplice", Hex, Hex, Hex, Hex),
279: makeSyscallInfo("move_pages", Hex, Hex, Hex, Hex, Hex, Hex),
280: makeSyscallInfo("utimensat", Hex, Path, UTimeTimespec, Hex),
- 281: makeSyscallInfo("epoll_pwait", Hex, Hex, Hex, Hex, Hex, Hex),
+ 281: makeSyscallInfo("epoll_pwait", Hex, Hex, Hex, Hex, SigSet, Hex),
282: makeSyscallInfo("signalfd", Hex, Hex, Hex),
283: makeSyscallInfo("timerfd_create", Hex, Hex),
284: makeSyscallInfo("eventfd", Hex),
@@ -314,7 +314,7 @@ var linuxAMD64 = SyscallMap{
294: makeSyscallInfo("inotify_init1", Hex),
295: makeSyscallInfo("preadv", Hex, ReadIOVec, Hex, Hex),
296: makeSyscallInfo("pwritev", Hex, WriteIOVec, Hex, Hex),
- 297: makeSyscallInfo("rt_tgsigqueueinfo", Hex, Hex, Hex, Hex),
+ 297: makeSyscallInfo("rt_tgsigqueueinfo", Hex, Hex, Signal, Hex),
298: makeSyscallInfo("perf_event_open", Hex, Hex, Hex, Hex, Hex),
299: makeSyscallInfo("recvmmsg", Hex, Hex, Hex, Hex, Hex),
300: makeSyscallInfo("fanotify_init", Hex, Hex),
diff --git a/pkg/sentry/strace/signal.go b/pkg/sentry/strace/signal.go
new file mode 100644
index 000000000..00ed02a3c
--- /dev/null
+++ b/pkg/sentry/strace/signal.go
@@ -0,0 +1,86 @@
+// Copyright 2018 Google LLC
+//
+// 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 strace
+
+import (
+ "fmt"
+ "strings"
+
+ "gvisor.googlesource.com/gvisor/pkg/abi"
+ "gvisor.googlesource.com/gvisor/pkg/abi/linux"
+ "gvisor.googlesource.com/gvisor/pkg/sentry/kernel"
+ "gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
+)
+
+// signalNames contains the names of all named signals.
+var signalNames = abi.ValueSet{
+ uint64(linux.SIGABRT): "SIGABRT",
+ uint64(linux.SIGALRM): "SIGALRM",
+ uint64(linux.SIGBUS): "SIGBUS",
+ uint64(linux.SIGCHLD): "SIGCHLD",
+ uint64(linux.SIGCONT): "SIGCONT",
+ uint64(linux.SIGFPE): "SIGFPE",
+ uint64(linux.SIGHUP): "SIGHUP",
+ uint64(linux.SIGILL): "SIGILL",
+ uint64(linux.SIGINT): "SIGINT",
+ uint64(linux.SIGIO): "SIGIO",
+ uint64(linux.SIGKILL): "SIGKILL",
+ uint64(linux.SIGPIPE): "SIGPIPE",
+ uint64(linux.SIGPROF): "SIGPROF",
+ uint64(linux.SIGPWR): "SIGPWR",
+ uint64(linux.SIGQUIT): "SIGQUIT",
+ uint64(linux.SIGSEGV): "SIGSEGV",
+ uint64(linux.SIGSTKFLT): "SIGSTKFLT",
+ uint64(linux.SIGSTOP): "SIGSTOP",
+ uint64(linux.SIGSYS): "SIGSYS",
+ uint64(linux.SIGTERM): "SIGTERM",
+ uint64(linux.SIGTRAP): "SIGTRAP",
+ uint64(linux.SIGTSTP): "SIGTSTP",
+ uint64(linux.SIGTTIN): "SIGTTIN",
+ uint64(linux.SIGTTOU): "SIGTTOU",
+ uint64(linux.SIGURG): "SIGURG",
+ uint64(linux.SIGUSR1): "SIGUSR1",
+ uint64(linux.SIGUSR2): "SIGUSR2",
+ uint64(linux.SIGVTALRM): "SIGVTALRM",
+ uint64(linux.SIGWINCH): "SIGWINCH",
+ uint64(linux.SIGXCPU): "SIGXCPU",
+ uint64(linux.SIGXFSZ): "SIGXFSZ",
+}
+
+var signalMaskActions = abi.ValueSet{
+ linux.SIG_BLOCK: "SIG_BLOCK",
+ linux.SIG_UNBLOCK: "SIG_UNBLOCK",
+ linux.SIG_SETMASK: "SIG_SETMASK",
+}
+
+func sigSet(t *kernel.Task, addr usermem.Addr) string {
+ if addr == 0 {
+ return "null"
+ }
+
+ var b [linux.SignalSetSize]byte
+ if _, err := t.CopyInBytes(addr, b[:]); err != nil {
+ return fmt.Sprintf("%#x (error copying sigset: %v)", addr, err)
+ }
+
+ set := linux.SignalSet(usermem.ByteOrder.Uint64(b[:]))
+
+ var signals []string
+ linux.ForEachSignal(set, func(sig linux.Signal) {
+ signals = append(signals, signalNames.ParseDecimal(uint64(sig)))
+ })
+
+ return fmt.Sprintf("%#x [%v]", addr, strings.Join(signals, " "))
+}
diff --git a/pkg/sentry/strace/strace.go b/pkg/sentry/strace/strace.go
index e40e0b57c..6df84e690 100644
--- a/pkg/sentry/strace/strace.go
+++ b/pkg/sentry/strace/strace.go
@@ -333,6 +333,12 @@ func (i *SyscallInfo) pre(t *kernel.Task, args arch.SyscallArguments, maximumBlo
output = append(output, PtraceRequestSet.Parse(args[arg].Uint64()))
case ItimerType:
output = append(output, ItimerTypes.Parse(uint64(args[arg].Int())))
+ case Signal:
+ output = append(output, signalNames.ParseDecimal(args[arg].Uint64()))
+ case SignalMaskAction:
+ output = append(output, signalMaskActions.Parse(uint64(args[arg].Int())))
+ case SigSet:
+ output = append(output, sigSet(t, args[arg].Pointer()))
case Oct:
output = append(output, "0o"+strconv.FormatUint(args[arg].Uint64(), 8))
case Hex:
@@ -391,6 +397,8 @@ func (i *SyscallInfo) post(t *kernel.Task, args arch.SyscallArguments, rval uint
output[arg] = timeval(t, args[arg].Pointer())
case Rusage:
output[arg] = rusage(t, args[arg].Pointer())
+ case PostSigSet:
+ output[arg] = sigSet(t, args[arg].Pointer())
}
}
}
diff --git a/pkg/sentry/strace/syscalls.go b/pkg/sentry/strace/syscalls.go
index 9eeb18a03..22aecc009 100644
--- a/pkg/sentry/strace/syscalls.go
+++ b/pkg/sentry/strace/syscalls.go
@@ -170,6 +170,18 @@ const (
// ItimerType is an itimer type (ITIMER_REAL, etc).
ItimerType
+
+ // Signal is a signal number.
+ Signal
+
+ // SignalMaskAction is a signal mask action passed to rt_sigprocmask(2).
+ SignalMaskAction
+
+ // SigSet is a signal set.
+ SigSet
+
+ // PostSigSet is a signal set, formatted after syscall execution.
+ PostSigSet
)
// defaultFormat is the syscall argument format to use if the actual format is
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 06:51:26 +0000