Re: [Qemu-devel] [PATCH] target-tilegx: Support dumping working flow instructions and registers

[Chen Gang <chengang@emindsoft.com.cn>]

Hello all:

Is this patch helpful? If it shouldn't be merged into our master branch,
please let me know, I shall treat it as my own local patch (when I
update my local master branch, I'll merge it at last).

Thanks.

On 3/16/16 23:51, Chen Gang wrote:
> Hello all:
> 
> It is only for analyzing issues, I guess it is helpful, so I send it,
> welcome any other ideas, suggestions, and completions.
> 
> And next, I shall continue to improve the floating point instruction
> features: "remove (u)int64_to_float64 from fdouble implementation".
> 
> Thanks.
> 
> On 3/16/16 23:38, chengang@emindsoft.com.cn wrote:
>> From: Chen Gang <gang.chen.5i5j@gmail.com>
>>
>> It is only for debug and analyzing tilegx qemu related issues.
>>
>> Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
>> ---
>>  target-tilegx/helper.c    | 34 ++++++++++++++++++++++++++++++++++
>>  target-tilegx/helper.h    |  2 ++
>>  target-tilegx/translate.c | 37 +++++++++++++++++++++++++++++++++++++
>>  3 files changed, 73 insertions(+)
>>
>> diff --git a/target-tilegx/helper.c b/target-tilegx/helper.c
>> index 616c5c7..c7cfe66 100644
>> --- a/target-tilegx/helper.c
>> +++ b/target-tilegx/helper.c
>> @@ -160,3 +160,37 @@ uint64_t helper_cmul2(uint64_t srca, uint64_t srcb, int shift, int round)
>>  
>>      return deposit32(realr >> shift, 16, 16, imagr >> shift);
>>  }
>> +
>> +extern char **debug_buf;
>> +
>> +#define DEBUG_DUMP_REGS
>> +
>> +static void dump_regs(CPUTLGState *env, int idx)
>> +{
>> +#ifdef DEBUG_DUMP_REGS
>> +    int i;
>> +
>> +    if (debug_buf[idx][2] == '\n') {
>> +        for (i = 0; i < TILEGX_R_COUNT; i++) {
>> +            if (!(i % 4)) {
>> +                fprintf(stderr, "\n");
>> +            }
>> +            fprintf(stderr, "r%2.2u = %16.16lx, ", i, env->regs[i]);
>> +        }
>> +        fprintf(stderr, "\n");
>> +        for (i = 0; i < TILEGX_SPR_COUNT; i++) {
>> +            if (!(i % 8)) {
>> +                fprintf(stderr, "\n");
>> +            }
>> +            fprintf(stderr, "s%2.2u = %16.16lx, ", i, env->spregs[i]);
>> +        }
>> +        fprintf(stderr, "\n");
>> +    }
>> +#endif
>> +}
>> +
>> +void helper_print_step(CPUTLGState *env, int idx)
>> +{
>> +    fprintf(stderr, "%s", debug_buf[idx]);
>> +    dump_regs(env, idx);
>> +}
>> diff --git a/target-tilegx/helper.h b/target-tilegx/helper.h
>> index 9281d0f..74f796a 100644
>> --- a/target-tilegx/helper.h
>> +++ b/target-tilegx/helper.h
>> @@ -24,3 +24,5 @@ DEF_HELPER_FLAGS_2(v1shrs, TCG_CALL_NO_RWG_SE, i64, i64, i64)
>>  DEF_HELPER_FLAGS_2(v2shl, TCG_CALL_NO_RWG_SE, i64, i64, i64)
>>  DEF_HELPER_FLAGS_2(v2shru, TCG_CALL_NO_RWG_SE, i64, i64, i64)
>>  DEF_HELPER_FLAGS_2(v2shrs, TCG_CALL_NO_RWG_SE, i64, i64, i64)
>> +
>> +DEF_HELPER_2(print_step, void, env, int)
>> diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
>> index 03918eb..8489494 100644
>> --- a/target-tilegx/translate.c
>> +++ b/target-tilegx/translate.c
>> @@ -47,6 +47,43 @@ static const char * const reg_names[64] = {
>>      "sn", "idn0", "idn1", "udn0", "udn1", "udn2", "udn2", "zero"
>>  };
>>  
>> +#define STATIC_DEBUG
>> +
>> +char **debug_buf;
>> +
>> +#ifdef STATIC_DEBUG
>> +
>> +#include <stdarg.h>
>> +
>> +#define qemu_log_mask(flag, fmt, ...)  debug_print(flag, fmt, ##__VA_ARGS__)
>> +
>> +static int debug_idx;
>> +
>> +extern void debug_print(int flag, const char *fmt, ...);
>> +
>> +void debug_print(int flag, const char *fmt, ...)
>> +{
>> +    va_list args;
>> +    char buf[0x400];
>> +    TCGv_i32 tmp;
>> +
>> +    va_start(args, fmt);
>> +    vsprintf(buf, fmt, args);
>> +    va_end(args);
>> +
>> +    if (!debug_buf) {
>> +        debug_buf = malloc(sizeof(char *) * 0x400000);
>> +    }
>> +    debug_buf[debug_idx] = malloc(strlen(buf) + 1);
>> +    strcpy(debug_buf[debug_idx], buf);
>> +
>> +    tmp = tcg_const_i32(debug_idx++);
>> +    gen_helper_print_step(cpu_env, tmp);
>> +    tcg_temp_free_i32(tmp);
>> +}
>> +
>> +#endif
>> +
>>  /* Modified registers are cached in temporaries until the end of the bundle. */
>>  typedef struct {
>>      unsigned reg;
>>
> 

-- 
Chen Gang (陈刚)

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