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| author | Ian Lance Taylor <iant@google.com> | 2013-11-19 01:09:47 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2013-11-19 01:09:47 +0000 |
| commit | 49579c7e20da4cf0dc82bf1c8458bf4fc7a38007 (patch) | |
| tree | a715cbe6fb809ff31f1487b709ea67a6f616cec5 /libbacktrace/internal.h | |
| parent | 7f369373da8aa1cfe4aa172d29ae2180a2b31139 (diff) | |
| download | gcc-49579c7e20da4cf0dc82bf1c8458bf4fc7a38007.zip gcc-49579c7e20da4cf0dc82bf1c8458bf4fc7a38007.tar.gz gcc-49579c7e20da4cf0dc82bf1c8458bf4fc7a38007.tar.bz2 | |
configure.ac: Check for support of __atomic extensions.
* configure.ac: Check for support of __atomic extensions.
* internal.h: Declare or #define atomic functions for use in
backtrace code.
* atomic.c: New file.
* dwarf.c (dwarf_lookup_pc): Use atomic functions.
(dwarf_fileline, backtrace_dwarf_add): Likewise.
* elf.c (elf_add_syminfo_data, elf_syminfo): Likewise.
(backtrace_initialize): Likewise.
* fileline.c (fileline_initialize): Likewise.
* Makefile.am (libbacktrace_la_SOURCES): Add atomic.c.
* configure, config.h.in, Makefile.in: Rebuild.
From-SVN: r204994
Diffstat (limited to 'libbacktrace/internal.h')
| -rw-r--r-- | libbacktrace/internal.h | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/libbacktrace/internal.h b/libbacktrace/internal.h index 1ea664a..c93e89f 100644 --- a/libbacktrace/internal.h +++ b/libbacktrace/internal.h @@ -65,7 +65,48 @@ POSSIBILITY OF SUCH DAMAGE. */ #define __sync_lock_test_and_set(A, B) (abort(), 0) #define __sync_lock_release(A) abort() -#endif /* !defined(HAVE_SYNC_FUNCTIONS) */ +#endif /* !defined (HAVE_SYNC_FUNCTIONS) */ + +#ifdef HAVE_ATOMIC_FUNCTIONS + +/* We have the atomic builtin functions. */ + +#define backtrace_atomic_load_pointer(p) \ + __atomic_load_n ((p), __ATOMIC_ACQUIRE) +#define backtrace_atomic_load_int(p) \ + __atomic_load_n ((p), __ATOMIC_ACQUIRE) +#define backtrace_atomic_store_pointer(p, v) \ + __atomic_store_n ((p), (v), __ATOMIC_RELEASE) +#define backtrace_atomic_store_size_t(p, v) \ + __atomic_store_n ((p), (v), __ATOMIC_RELEASE) +#define backtrace_atomic_store_int(p, v) \ + __atomic_store_n ((p), (v), __ATOMIC_RELEASE) + +#else /* !defined (HAVE_ATOMIC_FUNCTIONS) */ +#ifdef HAVE_SYNC_FUNCTIONS + +/* We have the sync functions but not the atomic functions. Define + the atomic ones in terms of the sync ones. */ + +extern void *backtrace_atomic_load_pointer (void *); +extern int backtrace_atomic_load_int (int *); +extern void backtrace_atomic_store_pointer (void *, void *); +extern void backtrace_atomic_store_size_t (size_t *, size_t); +extern void backtrace_atomic_store_int (int *, int); + +#else /* !defined (HAVE_SYNC_FUNCTIONS) */ + +/* We have neither the sync nor the atomic functions. These will + never be called. */ + +#define backtrace_atomic_load_pointer(p) (abort(), 0) +#define backtrace_atomic_load_int(p) (abort(), 0) +#define backtrace_atomic_store_pointer(p, v) abort() +#define backtrace_atomic_store_size_t(p, v) abort() +#define backtrace_atomic_store_int(p, v) abort() + +#endif /* !defined (HAVE_SYNC_FUNCTIONS) */ +#endif /* !defined (HAVE_ATOMIC_FUNCTIONS) */ /* The type of the function that collects file/line information. This is like backtrace_pcinfo. */ |