Refs #10260 OpenBSD support #25327

runtime/bin/platform_openbsd.cc

Index: runtime/bin/platform_openbsd.cc
diff --git a/runtime/bin/platform_linux.cc b/runtime/bin/platform_openbsd.cc
similarity index 91%
copy from runtime/bin/platform_linux.cc
copy to runtime/bin/platform_openbsd.cc
index 24cbfd3ebf58bd840cfffdfb17784544ffb332c7..3c01ae0f0cd3e735c2ae666e8b8790bdc566c193 100644
--- a/runtime/bin/platform_linux.cc
+++ b/runtime/bin/platform_openbsd.cc
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
-#if defined(TARGET_OS_LINUX)
+#if defined(TARGET_OS_OPENBSD)
 
 #include "bin/file.h"
 #include "bin/platform.h"
@@ -14,6 +14,7 @@
 
 #include "bin/fdutils.h"
 
+extern char **environ;
 
 namespace dart {
 namespace bin {
@@ -39,7 +40,7 @@ int Platform::NumberOfProcessors() {
 
 
 const char* Platform::OperatingSystem() {
-  return "linux";
+  return "openbsd";
 }
 
 
@@ -74,6 +75,7 @@ void Platform::FreeEnvironment(char** env, intptr_t count) {
 
 
 char* Platform::ResolveExecutablePath() {
+  // TODO(mulander): There is no procfs on OpenBSD - find a workaround

[Ivan Posva, 2016/01/11 23:58:40]

Would remembering arg[0] in main.cc work? It is not generally applicable for all
VM embedding scenarios, but could be a possibility here. Although I am not sure
whether this is even supported in OpenBSD.

[mulander, 2016/01/12 00:22:45]

There is an example implementation in Go I want to have a closer look at:

https://github.com/kardianos/osext/commit/b4814f465fb1f92d46e37f7ef84d732ece7...

It's not the prettiest thing but it works pretty well for syncthing. arg[0] as
in what's passed to main should obviously work except any link / path magic
happening.

   return File::LinkTarget("/proc/self/exe");
 }
 
@@ -84,4 +86,4 @@ void Platform::Exit(int exit_code) {
 }  // namespace bin
 }  // namespace dart
 
-#endif  // defined(TARGET_OS_LINUX)
+#endif  // defined(TARGET_OS_OPENBSD)