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| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-07-10 14:43:05 -0700 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-07-11 22:13:34 +0200 |
| commit | 531b014e7a2fedaeff0b19b2934d830cd4b35dc0 (patch) | |
| tree | 0de8355e9d533b4f6f90c3b389f58c992e75bb14 /tools/include/linux/compiler-gcc.h | |
| parent | tools: libbpf: move library error code into a separate file (diff) | |
| download | linux-dev-531b014e7a2fedaeff0b19b2934d830cd4b35dc0.tar.xz linux-dev-531b014e7a2fedaeff0b19b2934d830cd4b35dc0.zip | |
tools: bpf: make use of reallocarray
reallocarray() is a safer variant of realloc which checks for
multiplication overflow in case of array allocation. Since it's
not available in Glibc < 2.26 import kernel's overflow.h and
add a static inline implementation when needed. Use feature
detection to probe for existence of reallocarray.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/include/linux/compiler-gcc.h')
| -rw-r--r-- | tools/include/linux/compiler-gcc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/include/linux/compiler-gcc.h b/tools/include/linux/compiler-gcc.h index 70fe61295733..0d35f18006a1 100644 --- a/tools/include/linux/compiler-gcc.h +++ b/tools/include/linux/compiler-gcc.h @@ -36,3 +36,7 @@ #endif #define __printf(a, b) __attribute__((format(printf, a, b))) #define __scanf(a, b) __attribute__((format(scanf, a, b))) + +#if GCC_VERSION >= 50100 +#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 +#endif |