Linux Sandbox: Add support for SECCOMP_RET_TRACE.

sandbox/linux/seccomp-bpf/errorcode_unittest.cc

Index: sandbox/linux/seccomp-bpf/errorcode_unittest.cc
diff --git a/sandbox/linux/seccomp-bpf/errorcode_unittest.cc b/sandbox/linux/seccomp-bpf/errorcode_unittest.cc
index ef04a5f61f8e88e893ba7ee0683e1a2600cd1d56..e525d447523b1c29c8123aec41fa5a315add642d 100644
--- a/sandbox/linux/seccomp-bpf/errorcode_unittest.cc
+++ b/sandbox/linux/seccomp-bpf/errorcode_unittest.cc
@@ -24,6 +24,10 @@ SANDBOX_TEST(ErrorCode, ErrnoConstructor) {
   SandboxBPF sandbox;
   ErrorCode e3 = sandbox.Trap(NULL, NULL);
   SANDBOX_ASSERT((e3.err() & SECCOMP_RET_ACTION)  == SECCOMP_RET_TRAP);
+
+  uint16_t data = 0xdead;
+  ErrorCode e4(ErrorCode::ERR_TRACE + data);
+  SANDBOX_ASSERT(e4.err() == SECCOMP_RET_TRACE + data);
 }
 

[jln (very slow on Chromium), 2014/05/20 03:02:10]

Could you add a death test if trying to use SECCOMP_RET_TRACE +
not_16_bits_value?

[rickyz (Google), 2014/05/20 22:34:01]

Done.

 SANDBOX_TEST(ErrorCode, Trap) {