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Hopefully fixing the MinGW 32 build, which was broken by r200767. Not using rand_s() since MinGW does not have an implementation for it, but instead using the underlying CryptGenRandom APIs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201124 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Aaron Ballman 2014-02-11 02:47:33 +00:00
parent 921f0b1d66
commit 91b585bccc
2 changed files with 11 additions and 9 deletions
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5
lib/Support/Process.cpp
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@ -12,11 +12,6 @@
//===----------------------------------------------------------------------===//
#include "llvm/Config/config.h"
#if LLVM_ON_WIN32
// This define makes stdlib.h declare the rand_s function.
#define _CRT_RAND_S
#include <stdlib.h>
#endif
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Process.h"

15
lib/Support/Windows/Process.inc
View File

@ -362,8 +362,15 @@ const char *Process::ResetColor() {
}
unsigned Process::GetRandomNumber() {
unsigned int result;
const int ec = rand_s(&result);
assert(ec == 0 && "rand_s failed");
return result;
HCRYPTPROV HCPC;
if (!::CryptAcquireContextW(&HCPC, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT))
assert(false && "Could not acquire a cryptographic context");
ScopedCryptContext CryptoProvider(HCPC);
unsigned Ret;
if (!::CryptGenRandom(CryptoProvider, sizeof(Ret),
reinterpret_cast<BYTE *>(&Ret)))
assert(false && "Could not generate a random number");
return Ret;
}