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Bug 1167248: Test whether mysterious rand_s failures are due to LoadLibraryExW hooks. rs=terrence

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This commit is contained in:
David Major 2015-07-07 18:56:53 -04:00
parent 1ff0be1b75
commit 75e6de2c27
1 changed files with 25 additions and 0 deletions
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25
js/src/jsmath.cpp
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@ -23,6 +23,10 @@
# include <unistd.h>
#endif
#ifdef XP_WIN
# include "jswin.h"
#endif
#include "jsapi.h"
#include "jsatom.h"
#include "jscntxt.h"
@ -740,7 +744,28 @@ random_generateSeed()
seed.u64 = 0;
#if defined(XP_WIN)
/*
* Temporary diagnostic for bug 1167248: Test whether the injected hooks
* react differently to LoadLibraryW / LoadLibraryExW.
*/
HMODULE oldWay = LoadLibraryW(L"ADVAPI32.DLL");
HMODULE newWay = LoadLibraryExW(L"ADVAPI32.DLL",
nullptr,
LOAD_LIBRARY_SEARCH_SYSTEM32);
/* Fallback for older versions of Windows */
if (!newWay && GetLastError() == ERROR_INVALID_PARAMETER)
newWay = LoadLibraryExW(L"ADVAPI32.DLL", nullptr, 0);
if (oldWay && !newWay)
MOZ_CRASH();
errno_t error = rand_s(&seed.u32[0]);
if (oldWay)
FreeLibrary(oldWay);
if (newWay)
FreeLibrary(newWay);
MOZ_ASSERT(error == 0, "rand_s() error?!");
error = rand_s(&seed.u32[1]);