From 16c7074019f93ed17ad44a0cd3c308200a48bb12 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Mon, 26 Feb 2024 13:53:07 +0000
Subject: [PATCH] Add support for Windows

---
 gum/backend-windows/gumprocess-windows.c | 33 +++++++++++++++++++++++-
 tests/core/process.c                     |  9 ++++---
 tests/gumjs/script.c                     |  9 ++++---
 3 files changed, 44 insertions(+), 7 deletions(-)

diff --git a/gum/backend-windows/gumprocess-windows.c b/gum/backend-windows/gumprocess-windows.c
index 432db24de..a4197ef4d 100644
--- a/gum/backend-windows/gumprocess-windows.c
+++ b/gum/backend-windows/gumprocess-windows.c
@@ -27,6 +27,9 @@ typedef void (WINAPI * GumGetCurrentThreadStackLimitsFunc) (
     PULONG_PTR low_limit, PULONG_PTR high_limit);
 typedef struct _GumEnumerateSymbolsContext GumEnumerateSymbolsContext;
 typedef struct _GumFindExportContext GumFindExportContext;
+typedef BOOL (WINAPI * GetThreadTimesFunc) (HANDLE ThreadHandle,
+    LPFILETIME lpCreationTime, LPFILETIME lpExitTime, LPFILETIME lpKernelTime,
+    LPFILETIME lpUserTime);
 
 struct _GumEnumerateSymbolsContext
 {
@@ -640,7 +643,35 @@ gum_thread_resume (GumThreadId thread_id,
 guint64
 gum_thead_get_user_time (void)
 {
-  return 0;
+  static gboolean initialized = false;
+  static GetThreadTimesFunc get_thread_times = NULL;
+
+  HMODULE mod;
+  FILETIME userTime;
+  guint64 result;
+
+  if (!initialized)
+  {
+    initialized = TRUE;
+
+    mod = GetModuleHandle (_T ("kernel32.dll"));
+    if (mod == NULL)
+      return 0;
+
+    get_thread_times =(GetThreadTimesFunc) GetProcAddress (mod,
+        "GetThreadTimes");
+  }
+
+  if (get_thread_times == NULL)
+    return 0;
+
+  if (!get_thread_times (GetCurrentThread (), NULL, NULL, NULL, &userTime))
+    return 0;
+
+  result = ((guint64) userTime.dwHighDateTime) << 32 + userTime.dwLowDateTime;
+
+  /* Timings on Windows are to 100-nanosecond granularity. Convert to u-secs */
+  return result / 10;
 }
 
 gboolean
diff --git a/tests/core/process.c b/tests/core/process.c
index b1f248003..07fa48e96 100644
--- a/tests/core/process.c
+++ b/tests/core/process.c
@@ -309,7 +309,8 @@ TESTCASE (process_threads_get_user_time)
 
   do_work ();
   user_time_b = gum_thead_get_user_time ();
-#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD)
+#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD) \
+    || defined (HAVE_WINDOWS)
   g_assert_cmpuint (user_time_a, !=, 0);
   g_assert_cmpuint (user_time_b, >, user_time_a);
 #else
@@ -331,7 +332,8 @@ TESTCASE (process_threads_get_user_time_by_id_self)
 
   do_work ();
   user_time_b = gum_thead_get_user_time_by_id (tid);
-#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD)
+#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD) \
+    || defined (HAVE_WINDOWS)
   g_assert_cmpuint (user_time_a, !=, 0);
   g_assert_cmpuint (user_time_b, >, user_time_a);
 #else
@@ -360,7 +362,8 @@ TESTCASE (process_threads_get_user_time_by_id_other)
   g_usleep (250000);
   user_time_b = gum_thead_get_user_time_by_id (d.id);
 
-#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD)
+#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD) \
+    || defined (HAVE_WINDOWS)
   g_assert_cmpuint (user_time_a, !=, 0);
   g_assert_cmpuint (user_time_b, >, user_time_a);
 #else
diff --git a/tests/gumjs/script.c b/tests/gumjs/script.c
index 64846273d..360fc4869 100644
--- a/tests/gumjs/script.c
+++ b/tests/gumjs/script.c
@@ -5183,7 +5183,8 @@ TESTCASE (process_threads_get_user_time)
       );
   EXPECT_NO_MESSAGES ();
 
-#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD)
+#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD) \
+    || defined (HAVE_WINDOWS)
   g_assert_true (user_time_a != 0);
   g_assert_true (user_time_b > user_time_a);
 #else
@@ -5251,7 +5252,8 @@ TESTCASE (process_threads_get_user_time_other_thread)
   g_async_queue_unref (ctx.sleeper_messages);
   g_async_queue_unref (ctx.controller_messages);
 
-#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD)
+#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD) \
+    || defined (HAVE_WINDOWS)
     g_assert_true (user_time_a != 0);
     g_assert_true (user_time_b > user_time_a);
 #else
@@ -5361,7 +5363,8 @@ TESTCASE (process_threads_find_busy_thread)
     g_async_queue_unref (ctx[i].controller_messages);
   }
 
-#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD)
+#if defined (HAVE_LINUX) || defined (HAVE_DARWIN) || defined (HAVE_FREEBSD) \
+    || defined (HAVE_WINDOWS)
   EXPECT_SEND_MESSAGE_WITH ("%" G_GSIZE_MODIFIER "u", ctx[rand].id);
 #endif
 }