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tile: use better variable naming in INLINE_SYSCALL
At issue for INLINE_SYSCALL was that it used "err" and "val" as variable names in a #define, so that if it was used in a context where the "caller" was also using "err" or "val", and those variables were passed in to INLINE_SYSCALL, we would end up referencing the internal shadowed variables instead. For example, "char val" in check_may_shrink_heap() in sysdeps/unix/sysv/linux/malloc-sysdep.h was being shadowed by the syscall return "val" in INLINE_SYSCALL, causing the "char val" not to get updated at all, and may_shrink_heap ended up always false. A similar fix was made to INTERNAL_VSYSCALL_CALL.
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@ -1,3 +1,9 @@
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2015-05-26 Chris Metcalf <cmetcalf@ezchip.com>
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* sysdeps/unix/sysv/linux/tile/sysdep.h (INLINE_SYSCALL):
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Avoid using variables in #defines that might cause shadowing.
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(INTERNAL_VSYSCALL_CALL): Likewise.
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2015-05-26 Roland McGrath <roland@hack.frob.com>
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* sysdeps/nacl/lll_timedlock_wait.c: New file.
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@ -78,16 +78,17 @@
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/* Define a macro which expands inline into the wrapper code for a system
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call. */
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# undef INLINE_SYSCALL
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# define INLINE_SYSCALL(name, nr, args...) \
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# define INLINE_SYSCALL(name, nr, args...) \
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({ \
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INTERNAL_SYSCALL_DECL (err); \
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unsigned long val = INTERNAL_SYSCALL (name, err, nr, args); \
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if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (val, err), 0)) \
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{ \
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__set_errno (INTERNAL_SYSCALL_ERRNO (val, err)); \
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val = -1; \
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} \
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(long) val; })
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INTERNAL_SYSCALL_DECL (_sc_err); \
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unsigned long _sc_val = INTERNAL_SYSCALL (name, _sc_err, nr, args); \
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if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sc_val, _sc_err), 0)) \
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{ \
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__set_errno (INTERNAL_SYSCALL_ERRNO (_sc_val, _sc_err)); \
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_sc_val = -1; \
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} \
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(long) _sc_val; \
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})
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#undef INTERNAL_SYSCALL
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#define INTERNAL_SYSCALL(name, err, nr, args...) \
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@ -203,11 +204,11 @@
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"=R05" (_clobber_r5), "=R10" (_clobber_r10)
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#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
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({ \
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struct syscall_return_value rv = funcptr (args); \
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err = rv.error; \
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rv.value; \
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#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
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({ \
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struct syscall_return_value _sc_rv = funcptr (args); \
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err = _sc_rv.error; \
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_sc_rv.value; \
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})
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/* List of system calls which are supported as vsyscalls. */
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