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tools/perf: Add '__rel_loc' event field parsing support
Add new '__rel_loc' dynamic data location attribute support. This type attribute is similar to the '__data_loc' but records the offset from the field itself. The libtraceevent adds TEP_FIELD_IS_RELATIVE to the 'tep_format_field::flags' with TEP_FIELD_IS_DYNAMIC for'__rel_loc'. Link: https://lkml.kernel.org/r/163757344810.510314.12449413842136229871.stgit@devnote2 Cc: Beau Belgrave <beaub@linux.microsoft.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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@ -2726,6 +2726,8 @@ static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel,
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offset = format_field__intval(field, sample, evsel->needs_swap);
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syscall_arg.len = offset >> 16;
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offset &= 0xffff;
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if (field->flags & TEP_FIELD_IS_RELATIVE)
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offset += field->offset + field->size;
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}
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val = (uintptr_t)(sample->raw_data + offset);
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@ -318,6 +318,8 @@ static int add_tracepoint_field_value(struct ctf_writer *cw,
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offset = tmp_val;
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len = offset >> 16;
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offset &= 0xffff;
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if (flags & TEP_FIELD_IS_RELATIVE)
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offset += fmtf->offset + fmtf->size;
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}
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if (flags & TEP_FIELD_IS_ARRAY) {
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@ -2706,6 +2706,8 @@ void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char
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if (field->flags & TEP_FIELD_IS_DYNAMIC) {
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offset = *(int *)(sample->raw_data + field->offset);
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offset &= 0xffff;
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if (field->flags & TEP_FIELD_IS_RELATIVE)
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offset += field->offset + field->size;
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}
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return sample->raw_data + offset;
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@ -428,6 +428,8 @@ tracepoint_field(struct pyrf_event *pe, struct tep_format_field *field)
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offset = val;
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len = offset >> 16;
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offset &= 0xffff;
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if (field->flags & TEP_FIELD_IS_RELATIVE)
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offset += field->offset + field->size;
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}
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if (field->flags & TEP_FIELD_IS_STRING &&
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is_printable_array(data + offset, len)) {
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@ -392,6 +392,8 @@ static void perl_process_tracepoint(struct perf_sample *sample,
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if (field->flags & TEP_FIELD_IS_DYNAMIC) {
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offset = *(int *)(data + field->offset);
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offset &= 0xffff;
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if (field->flags & TEP_FIELD_IS_RELATIVE)
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offset += field->offset + field->size;
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} else
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offset = field->offset;
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XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
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@ -942,6 +942,8 @@ static void python_process_tracepoint(struct perf_sample *sample,
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offset = val;
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len = offset >> 16;
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offset &= 0xffff;
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if (field->flags & TEP_FIELD_IS_RELATIVE)
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offset += field->offset + field->size;
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}
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if (field->flags & TEP_FIELD_IS_STRING &&
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is_printable_array(data + offset, len)) {
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@ -2365,6 +2365,8 @@ static int64_t __sort__hde_cmp(struct perf_hpp_fmt *fmt,
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tep_read_number_field(field, a->raw_data, &dyn);
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offset = dyn & 0xffff;
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size = (dyn >> 16) & 0xffff;
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if (field->flags & TEP_FIELD_IS_RELATIVE)
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offset += field->offset + field->size;
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/* record max width for output */
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if (size > hde->dynamic_len)
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