Profiler API to modify environment variables (#23383) (dotnet#27157)

src/inc/corprof.idl

@@ -3985,6 +3985,40 @@ interface ICorProfilerInfo10 : ICorProfilerInfo9
     HRESULT ResumeRuntime();
 }
 
+[
+    object,
+    uuid(06398876-8987-4154-B621-40A00D6E4D04),
+    pointer_default(unique),
+    local
+]
+interface ICorProfilerInfo11 : ICorProfilerInfo10
+{
+    /*
+     * Get environment variable for the running managed code.
+     */
+    HRESULT GetEnvironmentVariable(
+                [in, string] const WCHAR *szName,
+                [in]         ULONG cchValue,
+                [out]        ULONG *pcchValue,
+                [out, annotation("_Out_writes_to_(cchValue, *pcchValue)")]
+                             WCHAR szValue[]);
+
+    /*
+     * Set environment variable for the running managed code.
+     *
+     * The code profiler calls this function to modify environment variables of the
+     * current managed process. For example, it can be used in the profiler's Initialize()
+     * or InitializeForAttach() callbacks.
+     *
+     * szName is the name of the environment variable, should not be NULL.
+     *
+     * szValue is the contents of the environment variable, or NULL if the variable should be deleted.
+     */
+    HRESULT SetEnvironmentVariable(
+                [in, string] const WCHAR *szName,
+                [in, string] const WCHAR *szValue);
+}
+
 /*
 * This interface lets you iterate over methods in the runtime.
 */

src/pal/prebuilt/idl/corprof_i.cpp

@@ -131,6 +131,9 @@ MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo9,0x008170DB,0xF8CC,0x4796,0x9A,0x51,0
 MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo10,0x2F1B5152,0xC869,0x40C9,0xAA,0x5F,0x3A,0xBE,0x02,0x6B,0xD7,0x20);
 
 
+MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo11,0x06398876,0x8987,0x4154,0xB6,0x21,0x40,0xA0,0x0D,0x6E,0x4D,0x04);
+
+
 MIDL_DEFINE_GUID(IID, IID_ICorProfilerMethodEnum,0xFCCEE788,0x0088,0x454B,0xA8,0x11,0xC9,0x9F,0x29,0x8D,0x19,0x42);