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[sanitizer] Unconditionally write to target buffer in *sprintf interceptors. 

This does not change the default behavior (check_printf in on by default in all tools).
With this change, check_printf flag only affects format string parsing.

llvm-svn: 208290
This commit is contained in:
Evgeniy Stepanov 2014-05-08 09:18:22 +00:00
parent 6532c20faa
commit d31ac26230
1 changed files with 4 additions and 4 deletions
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8
compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
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@ -750,7 +750,7 @@ FORMAT_INTERCEPTOR_IMPL(__isoc99_sscanf, __isoc99_vsscanf, str, format)
printf_common(ctx, format, aq); \
} \
int res = REAL(vname)(str, __VA_ARGS__); \
if (res >= 0 && common_flags()->check_printf) { \
if (res >= 0) { \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, str, res + 1); \
} \
VPRINTF_INTERCEPTOR_RETURN(); \
@ -764,7 +764,7 @@ FORMAT_INTERCEPTOR_IMPL(__isoc99_sscanf, __isoc99_vsscanf, str, format)
printf_common(ctx, format, aq); \
} \
int res = REAL(vname)(str, size, __VA_ARGS__); \
if (res >= 0 && common_flags()->check_printf) { \
if (res >= 0) { \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, str, Min(size, (SIZE_T)(res + 1))); \
} \
VPRINTF_INTERCEPTOR_RETURN(); \
@ -774,12 +774,12 @@ FORMAT_INTERCEPTOR_IMPL(__isoc99_sscanf, __isoc99_vsscanf, str, format)
#define VASPRINTF_INTERCEPTOR_IMPL(vname, strp, ...) \
{ \
VPRINTF_INTERCEPTOR_ENTER(vname, strp, __VA_ARGS__) \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, strp, sizeof(char *)); \
if (common_flags()->check_printf) { \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, strp, sizeof(char *)); \
printf_common(ctx, format, aq); \
} \
int res = REAL(vname)(strp, __VA_ARGS__); \
if (res >= 0 && common_flags()->check_printf) { \
if (res >= 0) { \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *strp, res + 1); \
} \
VPRINTF_INTERCEPTOR_RETURN(); \