Switch Linux Auru ports over to POSIX SHM instead of legacy SYSV SHM.

content/common/sandbox_seccomp_bpf_linux.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <asm/unistd.h>
 #include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/audit.h>
 #include <linux/filter.h>
@@ skipping 70 matching lines @@
 }
 
 inline bool IsArchitectureArm() {
 #if defined(__arm__)
   return true;
 #else
   return false;
 #endif
 }
 
+inline bool IsUsingToolKitGtk() {
+#if defined(TOOLKIT_GTK)
+  return true;
+#else
+  return false;
+#endif
+}
+
 intptr_t CrashSIGSYS_Handler(const struct arch_seccomp_data& args, void* aux) {
   int syscall = args.nr;
   if (syscall >= 1024)
     syscall = 0;
   // Encode 8-bits of the 1st two arguments too, so we can discern which socket
   // type, which fcntl, ... etc., without being likely to hit a mapped
   // address.
   // Do not encode more bits here without thinking about increasing the
   // likelihood of collision with mapped pages.
   syscall |= ((args.args[0] & 0xffUL) << 12);
@@ skipping 1278 matching lines @@
     case __NR_sched_getscheduler:
     case __NR_sched_setscheduler:
     case __NR_setpriority:
     case __NR_sysinfo:
     case __NR_times:
     case __NR_uname:
       return ErrorCode(ErrorCode::ERR_ALLOWED);
     case __NR_prlimit64:
       return ErrorCode(EPERM);  // See crbug.com/160157.
     default:
-      // These need further tightening.
+      if (IsUsingToolKitGtk()) {
 #if defined(__x86_64__) || defined(__arm__)
-      if (IsSystemVSharedMemory(sysno))
-        return ErrorCode(ErrorCode::ERR_ALLOWED);
+        if (IsSystemVSharedMemory(sysno))
+          return ErrorCode(ErrorCode::ERR_ALLOWED);
 #endif
 #if defined(__i386__)
-      if (IsSystemVIpc(sysno))
-        return ErrorCode(ErrorCode::ERR_ALLOWED);
+        if (IsSystemVIpc(sysno))
+          return ErrorCode(ErrorCode::ERR_ALLOWED);
 #endif
+      }
 
       // Default on the baseline policy.
       return BaselinePolicy(sandbox, sysno);
   }
 }
 
 ErrorCode FlashProcessPolicy(Sandbox *sandbox, int sysno, void *) {
   switch (sysno) {
     case __NR_sched_get_priority_max:
     case __NR_sched_get_priority_min:
     case __NR_sched_getaffinity:
     case __NR_sched_getparam:
     case __NR_sched_getscheduler:
     case __NR_sched_setscheduler:
     case __NR_times:
       return ErrorCode(ErrorCode::ERR_ALLOWED);
     case __NR_ioctl:
       return ErrorCode(ENOTTY);  // Flash Access.
     default:
-      // These need further tightening.
+      if (IsUsingToolKitGtk()) {
 #if defined(__x86_64__) || defined(__arm__)
-      if (IsSystemVSharedMemory(sysno))
-        return ErrorCode(ErrorCode::ERR_ALLOWED);
+        if (IsSystemVSharedMemory(sysno))
+          return ErrorCode(ErrorCode::ERR_ALLOWED);
 #endif
 #if defined(__i386__)
-      if (IsSystemVIpc(sysno))
-        return ErrorCode(ErrorCode::ERR_ALLOWED);
+        if (IsSystemVIpc(sysno))
+          return ErrorCode(ErrorCode::ERR_ALLOWED);
 #endif
+      }
 
       // Default on the baseline policy.
       return BaselinePolicy(sandbox, sysno);
   }
 }
 
 ErrorCode BlacklistDebugAndNumaPolicy(Sandbox *sandbox, int sysno, void *) {
   if (!Sandbox::IsValidSyscallNumber(sysno)) {
     // TODO(jln) we should not have to do that in a trivial policy.
     return ErrorCode(ENOSYS);
@@ skipping 187 matching lines @@
     // should enable it, enable it or die.
     bool started_sandbox = StartBpfSandbox(command_line, process_type);
     CHECK(started_sandbox);
     return true;
   }
 #endif
   return false;
 }
 
 }  // namespace content