65739691b9
This replaces the riscv specific handling from 7212466e735aa187d82f51dadbce957fe3da77f0 (which essentially is reverted), with a different implementation of the same (plus a bit more), based on the corresponding feature in dav1d's checkasm, supporting both Unix and Windows. See in particular the dav1d commits 0b6ee30eab2400e4f85b735ad29a68a842c34e21, 0421f787ea592fd2cc74c887f20b8dc31393788b, 8501a4b20135f93a4c3b426468e2240e872949c5 and d23e87f7aee26ddcf5f7a2e185112031477599a7, authored by Henrik Gramner. The overall approach compared to the existing implementation for riscv is the same; set up a signal handler, store the state with sigsetjmp, jump out of the crashing function with siglongjmp. The main difference is in what happens when the signal handler is invoked. In the previous implementation, it would resume from right before calling the crashing function, and then skip that call based on the setjmp return value. In the imported implementation from dav1d, we return to right before the check_func() call, which will skip testing the current function (as the pointer is the same as it was before). Other differences are: - Support for other signal handling mechanisms (Windows AddVectoredExceptionHandler) - Using RtlCaptureContext/RtlRestoreContext instead of setjmp/longjmp on Windows with SEH - Only catching signals once per function - if more than one signal is delivered before signal handling is reenabled, any signal is handled as it would without our handler - Not using an arch specific signal handler written in assembly Signed-off-by: Martin Storsjö <martin@martin.st>
378 lines
16 KiB
C
378 lines
16 KiB
C
/*
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* Assembly testing and benchmarking tool
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* Copyright (c) 2015 Henrik Gramner
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* Copyright (c) 2008 Loren Merritt
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef TESTS_CHECKASM_CHECKASM_H
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#define TESTS_CHECKASM_CHECKASM_H
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#include <stdint.h>
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#include "config.h"
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#if CONFIG_LINUX_PERF
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#include <unistd.h> // read(3)
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#include <sys/ioctl.h>
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#include <asm/unistd.h>
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#include <linux/perf_event.h>
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#elif CONFIG_MACOS_KPERF
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#include "libavutil/macos_kperf.h"
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#endif
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#include "libavutil/avstring.h"
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#include "libavutil/cpu.h"
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#include "libavutil/emms.h"
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#include "libavutil/internal.h"
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#include "libavutil/lfg.h"
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#include "libavutil/timer.h"
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#ifdef _WIN32
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#include <windows.h>
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#if ARCH_X86_32
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#include <setjmp.h>
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typedef jmp_buf checkasm_context;
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#define checkasm_save_context() checkasm_handle_signal(setjmp(checkasm_context_buf))
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#define checkasm_load_context(s) longjmp(checkasm_context_buf, s)
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#elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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/* setjmp/longjmp on Windows on architectures using SEH (all except x86_32)
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* will try to use SEH to unwind the stack, which doesn't work for assembly
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* functions without unwind information. */
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typedef struct { CONTEXT c; int status; } checkasm_context;
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#define checkasm_save_context() \
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(checkasm_context_buf.status = 0, \
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RtlCaptureContext(&checkasm_context_buf.c), \
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checkasm_handle_signal(checkasm_context_buf.status))
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#define checkasm_load_context(s) \
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(checkasm_context_buf.status = s, \
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RtlRestoreContext(&checkasm_context_buf.c, NULL))
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#else
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#define checkasm_context void*
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#define checkasm_save_context() 0
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#define checkasm_load_context() do {} while (0)
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#endif
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#else
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#include <setjmp.h>
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typedef sigjmp_buf checkasm_context;
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#define checkasm_save_context() checkasm_handle_signal(sigsetjmp(checkasm_context_buf, 1))
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#define checkasm_load_context(s) siglongjmp(checkasm_context_buf, s)
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#endif
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void checkasm_check_aacencdsp(void);
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void checkasm_check_aacpsdsp(void);
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void checkasm_check_ac3dsp(void);
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void checkasm_check_afir(void);
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void checkasm_check_alacdsp(void);
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void checkasm_check_audiodsp(void);
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void checkasm_check_av_tx(void);
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void checkasm_check_blend(void);
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void checkasm_check_blockdsp(void);
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void checkasm_check_bswapdsp(void);
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void checkasm_check_colorspace(void);
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void checkasm_check_exrdsp(void);
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void checkasm_check_fixed_dsp(void);
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void checkasm_check_flacdsp(void);
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void checkasm_check_float_dsp(void);
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void checkasm_check_fmtconvert(void);
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void checkasm_check_g722dsp(void);
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void checkasm_check_h264chroma(void);
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void checkasm_check_h264dsp(void);
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void checkasm_check_h264pred(void);
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void checkasm_check_h264qpel(void);
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void checkasm_check_hevc_add_res(void);
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void checkasm_check_hevc_deblock(void);
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void checkasm_check_hevc_idct(void);
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void checkasm_check_hevc_pel(void);
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void checkasm_check_hevc_sao(void);
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void checkasm_check_huffyuvdsp(void);
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void checkasm_check_idctdsp(void);
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void checkasm_check_jpeg2000dsp(void);
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void checkasm_check_llauddsp(void);
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void checkasm_check_llviddsp(void);
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void checkasm_check_llviddspenc(void);
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void checkasm_check_lpc(void);
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void checkasm_check_motion(void);
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void checkasm_check_nlmeans(void);
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void checkasm_check_opusdsp(void);
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void checkasm_check_pixblockdsp(void);
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void checkasm_check_sbrdsp(void);
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void checkasm_check_synth_filter(void);
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void checkasm_check_sw_gbrp(void);
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void checkasm_check_sw_rgb(void);
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void checkasm_check_sw_scale(void);
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void checkasm_check_takdsp(void);
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void checkasm_check_utvideodsp(void);
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void checkasm_check_v210dec(void);
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void checkasm_check_v210enc(void);
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void checkasm_check_vc1dsp(void);
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void checkasm_check_vf_bwdif(void);
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void checkasm_check_vf_eq(void);
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void checkasm_check_vf_gblur(void);
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void checkasm_check_vf_hflip(void);
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void checkasm_check_vf_threshold(void);
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void checkasm_check_vf_sobel(void);
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void checkasm_check_vp8dsp(void);
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void checkasm_check_vp9dsp(void);
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void checkasm_check_videodsp(void);
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void checkasm_check_vorbisdsp(void);
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struct CheckasmPerf;
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void *checkasm_check_func(void *func, const char *name, ...) av_printf_format(2, 3);
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int checkasm_bench_func(void);
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void checkasm_fail_func(const char *msg, ...) av_printf_format(1, 2);
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struct CheckasmPerf *checkasm_get_perf_context(void);
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void checkasm_report(const char *name, ...) av_printf_format(1, 2);
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void checkasm_set_signal_handler_state(int enabled);
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int checkasm_handle_signal(int s);
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extern checkasm_context checkasm_context_buf;
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/* float compare utilities */
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int float_near_ulp(float a, float b, unsigned max_ulp);
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int float_near_abs_eps(float a, float b, float eps);
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int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp);
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int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
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unsigned len);
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int float_near_abs_eps_array(const float *a, const float *b, float eps,
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unsigned len);
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int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
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unsigned max_ulp, unsigned len);
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int double_near_abs_eps(double a, double b, double eps);
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int double_near_abs_eps_array(const double *a, const double *b, double eps,
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unsigned len);
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extern AVLFG checkasm_lfg;
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#define rnd() av_lfg_get(&checkasm_lfg)
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static av_unused void *func_ref, *func_new;
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#define BENCH_RUNS 1000 /* Trade-off between accuracy and speed */
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/* Decide whether or not the specified function needs to be tested */
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#define check_func(func, ...) (checkasm_save_context(), func_ref = checkasm_check_func((func_new = func), __VA_ARGS__))
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/* Declare the function prototype. The first argument is the return value, the remaining
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* arguments are the function parameters. Naming parameters is optional. */
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#define declare_func(ret, ...) declare_new(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
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#define declare_func_float(ret, ...) declare_new_float(ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
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#define declare_func_emms(cpu_flags, ret, ...) declare_new_emms(cpu_flags, ret, __VA_ARGS__) typedef ret func_type(__VA_ARGS__)
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/* Indicate that the current test has failed */
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#define fail() checkasm_fail_func("%s:%d", av_basename(__FILE__), __LINE__)
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/* Print the test outcome */
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#define report checkasm_report
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/* Call the reference function */
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#define call_ref(...)\
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(checkasm_set_signal_handler_state(1),\
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((func_type *)func_ref)(__VA_ARGS__));\
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checkasm_set_signal_handler_state(0)
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#if ARCH_X86 && HAVE_X86ASM
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/* Verifies that clobbered callee-saved registers are properly saved and restored
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* and that either no MMX registers are touched or emms is issued */
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void checkasm_checked_call(void *func, ...);
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/* Verifies that clobbered callee-saved registers are properly saved and restored
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* and issues emms for asm functions which are not required to do so */
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void checkasm_checked_call_emms(void *func, ...);
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/* Verifies that clobbered callee-saved registers are properly saved and restored
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* but doesn't issue emms. Meant for dsp functions returning float or double */
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void checkasm_checked_call_float(void *func, ...);
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#if ARCH_X86_64
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/* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
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* This is done by clobbering the stack with junk around the stack pointer and calling the
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* assembly function through checked_call() with added dummy arguments which forces all
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* real arguments to be passed on the stack and not in registers. For 32-bit arguments the
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* upper half of the 64-bit register locations on the stack will now contain junk which will
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* cause misbehaving functions to either produce incorrect output or segfault. Note that
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* even though this works extremely well in practice, it's technically not guaranteed
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* and false negatives is theoretically possible, but there can never be any false positives.
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*/
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void checkasm_stack_clobber(uint64_t clobber, ...);
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#define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
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= (void *)checkasm_checked_call;
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#define declare_new_float(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__)\
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= (void *)checkasm_checked_call_float;
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#define declare_new_emms(cpu_flags, ret, ...) \
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ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__) = \
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((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
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(void *)checkasm_checked_call;
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#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
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#define call_new(...) (checkasm_set_signal_handler_state(1),\
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checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
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CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
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checked_call(func_new, 0, 0, 0, 0, 0, __VA_ARGS__));\
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checkasm_set_signal_handler_state(0)
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#elif ARCH_X86_32
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#define declare_new(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call;
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#define declare_new_float(ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call_float;
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#define declare_new_emms(cpu_flags, ret, ...) ret (*checked_call)(void *, __VA_ARGS__) = \
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((cpu_flags) & av_get_cpu_flags()) ? (void *)checkasm_checked_call_emms : \
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(void *)checkasm_checked_call;
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#define call_new(...)\
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(checkasm_set_signal_handler_state(1),\
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checked_call(func_new, __VA_ARGS__));\
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checkasm_set_signal_handler_state(0)
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#endif
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#elif ARCH_ARM && HAVE_ARMV5TE_EXTERNAL
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/* Use a dummy argument, to offset the real parameters by 2, not only 1.
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* This makes sure that potential 8-byte-alignment of parameters is kept the same
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* even when the extra parameters have been removed. */
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void checkasm_checked_call_vfp(void *func, int dummy, ...);
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void checkasm_checked_call_novfp(void *func, int dummy, ...);
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extern void (*checkasm_checked_call)(void *func, int dummy, ...);
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#define declare_new(ret, ...) ret (*checked_call)(void *, int dummy, __VA_ARGS__, \
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int, int, int, int, int, int, int, int, \
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int, int, int, int, int, int, int) = (void *)checkasm_checked_call;
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#define call_new(...) \
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(checkasm_set_signal_handler_state(1),\
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checked_call(func_new, 0, __VA_ARGS__, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0));\
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checkasm_set_signal_handler_state(0)
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#elif ARCH_AARCH64 && !defined(__APPLE__)
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void checkasm_stack_clobber(uint64_t clobber, ...);
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void checkasm_checked_call(void *func, ...);
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#define declare_new(ret, ...) ret (*checked_call)(void *, int, int, int, int, int, int, int, __VA_ARGS__,\
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int, int, int, int, int, int, int, int,\
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int, int, int, int, int, int, int)\
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= (void *)checkasm_checked_call;
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#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
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#define call_new(...) (checkasm_set_signal_handler_state(1),\
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checkasm_stack_clobber(CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,\
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CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB,CLOB),\
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checked_call(func_new, 0, 0, 0, 0, 0, 0, 0, __VA_ARGS__,\
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7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0));\
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checkasm_set_signal_handler_state(0)
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#elif ARCH_RISCV
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void checkasm_set_function(void *);
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void *checkasm_get_wrapper(void);
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#if HAVE_RV && (__riscv_xlen == 64) && defined (__riscv_d)
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#define declare_new(ret, ...) \
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ret (*checked_call)(__VA_ARGS__) = checkasm_get_wrapper();
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#define call_new(...) \
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(checkasm_set_signal_handler_state(1),\
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checkasm_set_function(func_new), checked_call(__VA_ARGS__));\
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checkasm_set_signal_handler_state(0)
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#else
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#define declare_new(ret, ...)
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#define call_new(...)\
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(checkasm_set_signal_handler_state(1),\
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((func_type *)func_new)(__VA_ARGS__));\
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checkasm_set_signal_handler_state(0)
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#endif
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#else
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#define declare_new(ret, ...)
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#define declare_new_float(ret, ...)
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#define declare_new_emms(cpu_flags, ret, ...)
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/* Call the function */
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#define call_new(...)\
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(checkasm_set_signal_handler_state(1),\
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((func_type *)func_new)(__VA_ARGS__));\
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checkasm_set_signal_handler_state(0)
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#endif
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#ifndef declare_new_emms
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#define declare_new_emms(cpu_flags, ret, ...) declare_new(ret, __VA_ARGS__)
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#endif
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#ifndef declare_new_float
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#define declare_new_float(ret, ...) declare_new(ret, __VA_ARGS__)
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#endif
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typedef struct CheckasmPerf {
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int sysfd;
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uint64_t cycles;
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int iterations;
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} CheckasmPerf;
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#if defined(AV_READ_TIME) || CONFIG_LINUX_PERF || CONFIG_MACOS_KPERF
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#if CONFIG_LINUX_PERF
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#define PERF_START(t) do { \
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ioctl(sysfd, PERF_EVENT_IOC_RESET, 0); \
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ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0); \
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} while (0)
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#define PERF_STOP(t) do { \
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int ret; \
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ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \
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ret = read(sysfd, &t, sizeof(t)); \
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(void)ret; \
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} while (0)
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#elif CONFIG_MACOS_KPERF
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#define PERF_START(t) t = ff_kperf_cycles()
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#define PERF_STOP(t) t = ff_kperf_cycles() - t
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#else
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#define PERF_START(t) t = AV_READ_TIME()
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#define PERF_STOP(t) t = AV_READ_TIME() - t
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#endif
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/* Benchmark the function */
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#define bench_new(...)\
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do {\
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if (checkasm_bench_func()) {\
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struct CheckasmPerf *perf = checkasm_get_perf_context();\
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av_unused const int sysfd = perf->sysfd;\
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func_type *tfunc = func_new;\
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uint64_t tsum = 0;\
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int ti, tcount = 0;\
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uint64_t t = 0; \
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checkasm_set_signal_handler_state(1);\
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for (ti = 0; ti < BENCH_RUNS; ti++) {\
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PERF_START(t);\
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tfunc(__VA_ARGS__);\
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tfunc(__VA_ARGS__);\
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tfunc(__VA_ARGS__);\
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tfunc(__VA_ARGS__);\
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PERF_STOP(t);\
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if (t*tcount <= tsum*4 && ti > 0) {\
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tsum += t;\
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tcount++;\
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}\
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}\
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emms_c();\
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perf->cycles += t;\
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perf->iterations++;\
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checkasm_set_signal_handler_state(0);\
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}\
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} while (0)
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#else
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#define bench_new(...) while(0)
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#define PERF_START(t) while(0)
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#define PERF_STOP(t) while(0)
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#endif
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#define DECL_CHECKASM_CHECK_FUNC(type) \
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int checkasm_check_##type(const char *file, int line, \
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const type *buf1, ptrdiff_t stride1, \
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const type *buf2, ptrdiff_t stride2, \
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int w, int h, const char *name)
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DECL_CHECKASM_CHECK_FUNC(uint8_t);
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DECL_CHECKASM_CHECK_FUNC(uint16_t);
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DECL_CHECKASM_CHECK_FUNC(uint32_t);
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DECL_CHECKASM_CHECK_FUNC(int16_t);
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DECL_CHECKASM_CHECK_FUNC(int32_t);
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#define PASTE(a,b) a ## b
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#define CONCAT(a,b) PASTE(a,b)
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#define checkasm_check(prefix, ...) CONCAT(checkasm_check_, prefix)(__FILE__, __LINE__, __VA_ARGS__)
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#endif /* TESTS_CHECKASM_CHECKASM_H */
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