Overhaul error handling in the core framework #633
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Details: - This commit makes changes pursuant to #479 that provides additional configure-time options for determining whether and how BLIS behaves when errors are detected at runtime. The options are presently not yet honored anywhere within the framework. However, this will change in the future.
Details:
- Fully updated frame/0 in accordance to new error-handling APIs and
error-checking policies. This includes:
a. all functions that might possibly generate an error now return a
value of type err_t.
b. any such function in (a) that is called will have its return value
captured and inspected for further return.
- Updated about half of the files within frame/base for err_t handling.
- Partially updated frame/thread, as necessary to given the updated
err_t return values for other code included in this commit. A key
omission was the thread decorators, which do not yet handle err_t
values.
- Added a new file, bli_error_macro_defs.h, of error-related macros.
These macros conveniently capture the logic that should be executed
in several common situations, including checking a locally-determined
error code for failure (and acting accordingly) as well as checking
whether the err_t return value from a recently-called function needs
to be returned up the function stack (in leiu of completing execution
of the current function normally). Not all of these functions are
used in the changes introduced in this commit, but they represent
most situations that I foresee needing going forward.
- Re-indexed the err_t enum values so that BLIS_SUCCESS is assigned 0
and BLIS_FAILURE (that is, generic failure) is assigned -1, instead
of -1 and -2, respectively. This beings the BLIS error code behavior
into closer conformality with many other C and Linux functions and
tools.
- Defined a new errmode_t enum with two values -- BLIS_ERROR_RETURN and
BLIS_ERROR_ABORT.
- Defined new static inline functions in bli_param_macro_defs.h for
distinguishing ind_t values (e.g. BLIS_NAT and BLIS_1M). Did the same
for dir_t values (e.g. BLIS_FWD and BLIS_BWD).
- Replaced all instances in BLIS of
if ( rntm == NULL )
{ bli_rntm_init_from_global( &rntm_l ); rntm = &rntm_l; }
else { rntm_l = *rntm; rntm = &rntm_l; }
with a call to a new static inline function that offers identical
functionality:
bli_rntm_init_if_null( &rntm, &rntm_l );
- Replaced all instances in BLIS of
if ( cntx == NULL ) cntx = bli_gks_query_cntx();
with a call to a new static inline function that offers identical
functionality:
bli_gks_query_cntx_if_null( ( const cntx_t** )&cntx );
- Moved frame/base/cast/bli_castnzm.c and .h to an 'old' sub-directory.
- Removed 'restrict' qualifier from cntx_t* argument to scalv and axpyf
kernels in 'zen' kernel set.
- Updated hardware auto-detection code to reflect updated function
signature to bli_arch_string().
- Updated the output of 'configure --help' to correctly indicate that
error checking is enabled by default.
- Updated testsuite source files to conform to above changes.
- Updated documentation to reflect updated function signatures,
including removal of 'restrict' qualifier from cntx_t* and auxinfo_t*
arguments to various kernels APIs.
Details: - Fixed a couple of compilation errors plus one logical error due to variable shadowing.
Details: - Promote bli_pba_rntm_set_pba() to a full function, rather than a static inline function, so that it can be exported for shared libraries. This seems better than the alternative of exporting the function bli_pba_query(), which, as far as I can see, end users should not need access to.
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Going forward, this PR branch will implement the changes set forth in #479.
To start out with, only the new
configureoptions are implemented. I'll incrementally update parts of the framework to (a) observe the new error checking flags and respond accordingly, and (b) returnerr_tvalues up the call stack wherever possible.Thanks for your patience on this project, @jdiamondGitHub.