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SubjectRe: [PATCH V8 13/15] perf tools: expand perf_event__synthesize_sample()
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


jirka


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