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priv: Make really sure memset doesn't get optimzed out.

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Andreas Schneider
2013-03-13 15:37:51 +01:00
parent 222a0d78ca
commit 8455d79bb6
1 changed files with 2 additions and 2 deletions
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include/libssh/priv.h
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@@ -219,10 +219,10 @@ int match_hostname(const char *host, const char *pattern, unsigned int len);
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0])) #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
/** Overwrite a string with '\0' */ /** Overwrite a string with '\0' */
#define BURN_STRING(x) do { if ((x) != NULL) memset((x), '\0', strlen((x))); __asm__ volatile (""); } while(0) #define BURN_STRING(x) do { if ((x) != NULL) memset((x), '\0', strlen((x))); __asm__ volatile ("" : : : "memory"); } while(0)
/** Overwrite the buffer with '\0' */ /** Overwrite the buffer with '\0' */
#define BURN_BUFFER(x, size) do { if ((x) != NULL) memset((x), '\0', (size))); __asm__ volatile (""); } while(0) #define BURN_BUFFER(x, size) do { if ((x) != NULL) memset((x), '\0', (size))); __asm__ volatile ("") : : : "memory"; } while(0)
/** /**
* This is a hack to fix warnings. The idea is to use this everywhere that we * This is a hack to fix warnings. The idea is to use this everywhere that we