[lldb] [llvm] [LLDB] Extract process arguments from core dump for Linux (PR #185338)

[David Spickett via llvm-commits]

================
@@ -1539,6 +1540,36 @@ class Process : public std::enable_shared_from_this<Process>,
   ///     File path to the core file.
   virtual FileSpec GetCoreFile() const { return {}; }
 
+  class CoreArgs {
+    std::string m_cmd;
+    bool m_might_be_truncated;
+
+  public:
+    CoreArgs() = default;
+    CoreArgs(const std::string &args, bool might_be_truncated)
+        : m_cmd(args), m_might_be_truncated(might_be_truncated) {}
+
+    void Format(Stream &stream) const {
+      if (m_cmd.empty())
+        return;
+      stream << "Core was generated by '" << m_cmd << "'";
+      if (this->m_might_be_truncated)
+        stream << " (command might be truncated)";
+      stream << ".\n";
+    }
+
+    bool empty() const { return m_cmd.empty(); }
+
+    Args as_args() const { return Args(m_cmd); }
+  };
+
+  /// Provide arguments of a command that triggered a core dump.
+  ///
+  /// \return
+  ///   The arguments that created the core dump.
+  ///   If this process is a live debug session, returns a std::nullopt.
----------------
DavidSpickett wrote:

```
///   If this process is a live debug session, or the core dump contained no arguments, returns a std::nullopt.
```

https://github.com/llvm/llvm-project/pull/185338