Squashed 'ext/detours/' content from commit 39aa864

git-subtree-dir: ext/detours
git-subtree-split: 39aa864d2985099c8d847e29a5fb86618039b9c4

1 files changed, 104 insertions, 0 deletions

diff --git a/samples/region/region.cpp b/samples/region/region.cpp
new file mode 100644
index 0000000..d23f583
--- /dev/null
+++ b/samples/region/region.cpp
@@ -0,0 +1,104 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+//  Test the different system region bounds (region.cpp of region.exe)
+//
+//  Microsoft Research Detours Package
+//
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+#include <stdio.h>
+
+#include <windows.h>
+#include <detours.h>
+
+//////////////////////////////////////////////////////////////////////////////
+//
+static DWORD (WINAPI * TrueSleepEx)(DWORD dwMilliseconds, BOOL bAlertable) = SleepEx;
+
+DWORD WINAPI LoudSleepEx(DWORD dwMilliseconds, BOOL bAlertable)
+{
+    DWORD dwBeg = GetTickCount();
+    DWORD ret = TrueSleepEx(dwMilliseconds, bAlertable);
+    DWORD dwEnd = GetTickCount();
+
+    printf("Slept %lu ticks.\n", dwEnd - dwBeg);
+    return ret;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+//
+PVOID AttachAndDetach(DWORD dwMilliseconds)
+{
+    LONG error;
+    PVOID trampoline;
+
+    DetourTransactionBegin();
+    DetourUpdateThread(GetCurrentThread());
+    DetourAttach(&(PVOID&)TrueSleepEx, LoudSleepEx);
+    error = DetourTransactionCommit();
+
+    printf("Attach: %ld, Trampoline: %p\n", error, TrueSleepEx);
+
+    trampoline = TrueSleepEx;
+
+    printf("\n");
+    printf("Sleep(%lu)\n", dwMilliseconds);
+    Sleep(dwMilliseconds);
+    printf("\n");
+
+    DetourTransactionBegin();
+    DetourUpdateThread(GetCurrentThread());
+    DetourDetach(&(PVOID&)TrueSleepEx, LoudSleepEx);
+    error = DetourTransactionCommit();
+
+    return trampoline;
+}
+
+int main(int argc, char **argv)
+{
+    (void)argc;
+    (void)argv;
+
+    // First, save the default system region.
+
+    PVOID pDefaultLower = DetourSetSystemRegionLowerBound(NULL);
+    PVOID pDefaultUpper = DetourSetSystemRegionUpperBound(NULL);
+
+    // Now attach the detour with the default system region.
+
+    DetourSetSystemRegionLowerBound(pDefaultLower);
+    DetourSetSystemRegionUpperBound(pDefaultUpper);
+
+    printf("%p..%p: ", pDefaultLower, pDefaultUpper);
+    PVOID pTramp1 = AttachAndDetach(10);
+
+    printf("%p..%p: ", pDefaultLower, pDefaultUpper);
+    PVOID pTramp2 = AttachAndDetach(10);
+
+    // Now attach the detour with a smaller system region.
+
+    PVOID pSmallerLower = (PVOID)( ((ULONG_PTR)pTramp1) & ~(ULONG_PTR)0x3fffffff );
+    PVOID pSmallerUpper = (PVOID)( ((ULONG_PTR)pTramp1 + 0x3fffffff) & ~(ULONG_PTR)0x3fffffff );
+
+    DetourSetSystemRegionLowerBound(pSmallerLower);
+    DetourSetSystemRegionUpperBound(pSmallerUpper);
+
+    printf("%p..%p: ", pSmallerLower, pSmallerUpper);
+    PVOID pTramp3 = AttachAndDetach(20);
+
+    printf("Sleep(30)\n");
+    Sleep(30);
+    printf("\n");
+
+    if (pTramp1 != pTramp2) {
+        printf("!!!!!! Trampoling allocation is not deterministic.  %p != %p\n", pTramp1, pTramp2);
+        return 1;
+    }
+    else if (pTramp2 == pTramp3) {
+        printf("!!!!!! Trampoling allocation doesn't skip region.  %p == %p\n", pTramp2, pTramp3);
+        return 2;
+    }
+
+    return 0;
+}
+