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SubjectRe: [PATCH V8 13/15] perf tools: expand perf_event__synthesize_sample()
On 24/07/13 15:50, Jiri Olsa wrote:
> On Thu, Jul 18, 2013 at 01:42:55PM +0300, Adrian Hunter wrote:
>
> SNIP
>
>> @@ -1349,11 +1349,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
>> }
>>
>> int perf_event__synthesize_sample(union perf_event *event, u64 type,
>> + u64 sample_regs_user,
>> const struct perf_sample *sample,
>> bool swapped)
>> {
>> u64 *array;
>> -
>> + size_t sz;
>> /*
>> * used for cross-endian analysis. See git commit 65014ab3
>> * for why this goofiness is needed.
>> @@ -1426,6 +1427,73 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
>> array++;
>> }
>>
>> + if (type & PERF_SAMPLE_READ) {
>> + fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
>> + return -1;
>> + }
>> +
>> + if (type & PERF_SAMPLE_CALLCHAIN) {
>> + sz = (sample->callchain->nr + 1) * sizeof(u64);
>> + memcpy(array, sample->callchain, sz);
>> + array = (void *)array + sz;
>> + }
>> +
>> + if (type & PERF_SAMPLE_RAW) {
>> + u.val32[0] = sample->raw_size;
>> + if (WARN_ONCE(swapped,
>> + "Endianness of raw data not corrected!\n")) {
>> + /*
>> + * Inverse of what is done in perf_evsel__parse_sample
>> + */
>> + u.val32[0] = bswap_32(u.val32[0]);
>> + u.val32[1] = bswap_32(u.val32[1]);
>> + u.val64 = bswap_64(u.val64);
>> + }
>> + *array = u.val64;
>> + array = (void *)array + sizeof(u32);
>> +
>> + memcpy(array, sample->raw_data, sample->raw_size);
>> + array = (void *)array + sample->raw_size;
>> + }
>> +
>> + if (type & PERF_SAMPLE_BRANCH_STACK) {
>> + sz = sample->branch_stack->nr * sizeof(struct branch_entry);
>> + sz += sizeof(u64);
>> + memcpy(array, sample->branch_stack, sz);
>> + array = (void *)array + sz;
>> + }
>> +
>> + if (type & PERF_SAMPLE_REGS_USER) {
>> + if (sample->user_regs.regs && sample_regs_user) {
>> + *array++ = sample_regs_user;
>
> it's 'enum perf_sample_regs_abi' value that goes here ^^^
>
> I guess for now it could be hardcoded like:
>
> #if defined(__x86_64__)
> abi = PERF_SAMPLE_REGS_ABI_64
> #else
> #if defined(__i386__)
> abi = PERF_SAMPLE_REGS_ABI_64
> #endif
> WARN()
> #endif

Thanks for reviewing this.

Why isn't it better to leave it as a parameter?



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