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Remove complicated libspl assert wrappers

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Effectively provide our own version of assert()/verify() for use
in user space.  This minimizes our dependencies and aligns the
user space assertion handling with what's used in the kernel.

Signed-off-by: Carlo Landmeter <clandmeter@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4449
This commit is contained in:
Brian Behlendorf 2016-03-01 15:45:43 +01:00
parent e3e7cf6026
commit 726c4a2565
2 changed files with 36 additions and 51 deletions
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5
include/libzfs_impl.h
View File

@ -46,11 +46,6 @@
extern "C" {
#endif
#ifdef VERIFY
#undef VERIFY
#endif
#define VERIFY verify
typedef struct libzfs_fru {
char *zf_device;
char *zf_fru;

82
lib/libspl/include/assert.h
View File

@ -32,68 +32,54 @@
#include <stdio.h>
#include <stdlib.h>
#ifndef __assert_c99
static inline void
__assert_c99(const char *expr, const char *file, int line, const char *func)
static inline int
libspl_assert(const char *buf, const char *file, const char *func, int line)
{
fprintf(stderr, "%s:%i: %s: Assertion `%s` failed.\n",
file, line, func, expr);
fprintf(stderr, "%s\n", buf);
fprintf(stderr, "ASSERT at %s:%d:%s()", file, line, func);
abort();
}
#endif /* __assert_c99 */
#ifndef verify
#if defined(__STDC__)
#if __STDC_VERSION__ - 0 >= 199901L
#define verify(EX) (void)((EX) || \
(__assert_c99(#EX, __FILE__, __LINE__, __func__), 0))
#else
#define verify(EX) (void)((EX) || (__assert(#EX, __FILE__, __LINE__), 0))
#endif /* __STDC_VERSION__ - 0 >= 199901L */
#else
#define verify(EX) (void)((EX) || (_assert("EX", __FILE__, __LINE__), 0))
#endif /* __STDC__ */
#endif /* verify */
#ifdef verify
#undef verify
#endif
#undef VERIFY
#undef ASSERT
#define VERIFY(cond) \
(void) ((!(cond)) && \
libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
#define verify(cond) \
(void) ((!(cond)) && \
libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
#define VERIFY verify
#define ASSERT assert
extern void __assert(const char *, const char *, int);
static inline int
assfail(const char *buf, const char *file, int line)
{
__assert(buf, file, line);
return (0);
}
/* BEGIN CSTYLED */
#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
const TYPE __left = (TYPE)(LEFT); \
const TYPE __right = (TYPE)(RIGHT); \
if (!(__left OP __right)) { \
char *__buf = alloca(256); \
(void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
#LEFT, #OP, #RIGHT, \
(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
assfail(__buf, __FILE__, __LINE__); \
} \
#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) \
do { \
const TYPE __left = (TYPE)(LEFT); \
const TYPE __right = (TYPE)(RIGHT); \
if (!(__left OP __right)) { \
char *__buf = alloca(256); \
(void) snprintf(__buf, 256, \
"%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT, \
(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
libspl_assert(__buf, __FILE__, __FUNCTION__, __LINE__); \
} \
} while (0)
/* END CSTYLED */
#define VERIFY3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t)
#define VERIFY3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t)
#define VERIFY3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t)
#define VERIFY0(x) VERIFY3_IMPL(x, ==, 0, uint64_t)
#ifdef assert
#undef assert
#endif
#ifdef NDEBUG
#define ASSERT3S(x, y, z) ((void)0)
#define ASSERT3U(x, y, z) ((void)0)
#define ASSERT3P(x, y, z) ((void)0)
#define ASSERT0(x) ((void)0)
#define ASSERT(x) ((void)0)
#define assert(x) ((void)0)
#define ASSERTV(x)
#define IMPLY(A, B) ((void)0)
#define EQUIV(A, B) ((void)0)
@ -102,13 +88,17 @@ assfail(const char *buf, const char *file, int line)
#define ASSERT3U(x, y, z) VERIFY3U(x, y, z)
#define ASSERT3P(x, y, z) VERIFY3P(x, y, z)
#define ASSERT0(x) VERIFY0(x)
#define ASSERT(x) VERIFY(x)
#define assert(x) VERIFY(x)
#define ASSERTV(x) x
#define IMPLY(A, B) \
((void)(((!(A)) || (B)) || \
assfail("(" #A ") implies (" #B ")", __FILE__, __LINE__)))
libspl_assert("(" #A ") implies (" #B ")", \
__FILE__, __FUNCTION__, __LINE__)))
#define EQUIV(A, B) \
((void)((!!(A) == !!(B)) || \
assfail("(" #A ") is equivalent to (" #B ")", __FILE__, __LINE__)))
libspl_assert("(" #A ") is equivalent to (" #B ")", \
__FILE__, __FUNCTION__, __LINE__)))
#endif /* NDEBUG */