Electroneum
memwipe.cpp
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28 
29 #include "gtest/gtest.h"
30 
31 #include <stdint.h>
32 #include "misc_log_ex.h"
33 #include "memwipe.h"
34 
35 // Probably won't catch the optimized out case, but at least we test
36 // it works in the normal case
37 static void test(bool wipe)
38 {
39  char *foo = (char*)malloc(4);
40  ASSERT_TRUE(foo != NULL);
41  intptr_t foop = (intptr_t)foo;
42  strcpy(foo, "bar");
43  void *bar = wipe ? memwipe(foo, 3) : memset(foo, 0, 3);
44  ASSERT_EQ(foo, bar);
45  free(foo);
46  char *quux = (char*)malloc(4); // same size, just after free, so we're likely to get the same, depending on the allocator
47  if ((intptr_t)quux == foop)
48  {
49  MDEBUG(std::hex << std::setw(8) << std::setfill('0') << *(uint32_t*)quux);
50  if (wipe) { ASSERT_TRUE(memcmp(quux, "bar", 3)); }
51  }
52  else MWARNING("We did not get the same location, cannot check");
53  free(quux);
54 }
55 
56 TEST(memwipe, control)
57 {
58  test(false);
59 }
60 
61 TEST(memwipe, works)
62 {
63  test(true);
64 }
#define MDEBUG(x)
Definition: misc_log_ex.h:76
#define ASSERT_EQ(val1, val2)
Definition: gtest.h:1956
unsigned int uint32_t
Definition: stdint.h:126
#define MWARNING(x)
Definition: misc_log_ex.h:74
#define ASSERT_TRUE(condition)
Definition: gtest.h:1865
TEST(memwipe, control)
Definition: memwipe.cpp:56
void * memwipe(void *src, size_t n)
_W64 signed int intptr_t
Definition: stdint.h:164