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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2021-02-05 13:18:58 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2021-02-10 19:08:33 +0530 |
| commit | 61117bfa1b08ca048e6512c0652c568300fedf6a (patch) | |
| tree | d752f7a8eec0c3a174c42f73f1e7927616d6d073 /elf/dl-tunable-types.h | |
| parent | e604a5e4bb61267c58e6b6179209efe74ab5f675 (diff) | |
| download | glibc-61117bfa1b08ca048e6512c0652c568300fedf6a.tar glibc-61117bfa1b08ca048e6512c0652c568300fedf6a.tar.gz glibc-61117bfa1b08ca048e6512c0652c568300fedf6a.tar.bz2 glibc-61117bfa1b08ca048e6512c0652c568300fedf6a.zip | |
tunables: Simplify TUNABLE_SET interface
The TUNABLE_SET interface took a primitive C type argument, which
resulted in inconsistent type conversions internally due to incorrect
dereferencing of types, especialy on 32-bit architectures. This
change simplifies the TUNABLE setting logic along with the interfaces.
Now all numeric tunable values are stored as signed numbers in
tunable_num_t, which is intmax_t. All calls to set tunables cast the
input value to its primitive type and then to tunable_num_t for
storage. This relies on gcc-specific (although I suspect other
compilers woul also do the same) unsigned to signed integer conversion
semantics, i.e. the bit pattern is conserved. The reverse conversion
is guaranteed by the standard.
Diffstat (limited to 'elf/dl-tunable-types.h')
| -rw-r--r-- | elf/dl-tunable-types.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/elf/dl-tunable-types.h b/elf/dl-tunable-types.h index 3fcc0806f5..626ca334be 100644 --- a/elf/dl-tunable-types.h +++ b/elf/dl-tunable-types.h @@ -38,8 +38,8 @@ typedef enum typedef struct { tunable_type_code_t type_code; - int64_t min; - int64_t max; + tunable_num_t min; + tunable_num_t max; } tunable_type_t; /* Security level for tunables. This decides what to do with individual |