[Lldb-commits] [PATCH] D76835: [lldb] Fix TestSettings.test_pass_host_env_vars on windows

[Pavel Labath via Phabricator via lldb-commits]

This revision was automatically updated to reflect the committed changes.
labath marked an inline comment as done.
Closed by commit rG908f78f3c198: [lldb] Fix TestSettings.test_pass_host_env_vars on windows (authored by labath).

Changed prior to commit:
  https://reviews.llvm.org/D76835?vs=252785&id=253594#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76835/new/

https://reviews.llvm.org/D76835

Files:
  lldb/source/Host/windows/ProcessLauncherWindows.cpp
  lldb/test/API/commands/settings/TestSettings.py


Index: lldb/test/API/commands/settings/TestSettings.py
===================================================================
--- lldb/test/API/commands/settings/TestSettings.py
+++ lldb/test/API/commands/settings/TestSettings.py
@@ -286,7 +286,6 @@
                 "Environment variable 'MY_ENV_VAR' successfully passed."])
 
     @skipIfRemote  # it doesn't make sense to send host env to remote target
-    @skipIf(oslist=["windows"])
     def test_pass_host_env_vars(self):
         """Test that the host env vars are passed to the launched process."""
         self.build()
Index: lldb/source/Host/windows/ProcessLauncherWindows.cpp
===================================================================
--- lldb/source/Host/windows/ProcessLauncherWindows.cpp
+++ lldb/source/Host/windows/ProcessLauncherWindows.cpp
@@ -23,10 +23,9 @@
 namespace {
 void CreateEnvironmentBuffer(const Environment &env,
                              std::vector<char> &buffer) {
-  if (env.size() == 0)
-    return;
-
-  // Environment buffer is a null terminated list of null terminated strings
+  // The buffer is a list of null-terminated UTF-16 strings, followed by an
+  // extra L'\0' (two bytes of 0).  An empty environment must have one
+  // empty string, followed by an extra L'\0'.
   for (const auto &KV : env) {
     std::wstring warg;
     if (llvm::ConvertUTF8toWide(Environment::compose(KV), warg)) {
@@ -38,6 +37,9 @@
   // One null wchar_t (to end the block) is two null bytes
   buffer.push_back(0);
   buffer.push_back(0);
+  // Insert extra two bytes, just in case the environment was empty.
+  buffer.push_back(0);
+  buffer.push_back(0);
 }
 
 bool GetFlattenedWindowsCommandString(Args args, std::string &command) {
@@ -94,8 +96,7 @@
 
   LPVOID env_block = nullptr;
   ::CreateEnvironmentBuffer(launch_info.GetEnvironment(), environment);
-  if (!environment.empty())
-    env_block = environment.data();
+  env_block = environment.data();
 
   executable = launch_info.GetExecutableFile().GetPath();
   GetFlattenedWindowsCommandString(launch_info.GetArguments(), commandLine);


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D76835.253594.patch
Type: text/x-patch
Size: 2086 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/lldb-commits/attachments/20200330/1ac13203/attachment-0001.bin>