void ReportCommand::ProcessSampleRecord(const SampleRecord& r) {
if (use_branch_address_ && (r.sample_type & PERF_SAMPLE_BRANCH_STACK)) {
for (auto& item : r.branch_stack_data.stack) {
if (item.from != 0 && item.to != 0) {
sample_tree_->AddBranchSample(r.tid_data.pid, r.tid_data.tid, item.from, item.to,
item.flags, r.time_data.time, r.period_data.period);
}
}
} else {
bool in_kernel = (r.header.misc & PERF_RECORD_MISC_CPUMODE_MASK) == PERF_RECORD_MISC_KERNEL;
SampleEntry* sample = sample_tree_->AddSample(r.tid_data.pid, r.tid_data.tid, r.ip_data.ip,
r.time_data.time, r.period_data.period, in_kernel);
CHECK(sample != nullptr);
if (accumulate_callchain_ && (r.sample_type & PERF_SAMPLE_CALLCHAIN) != 0) {
std::vector<SampleEntry*> callchain;
callchain.push_back(sample);
const std::vector<uint64_t>& ips = r.callchain_data.ips;
bool first_ip = true;
for (auto& ip : ips) {
if (ip >= PERF_CONTEXT_MAX) {
switch (ip) {
case PERF_CONTEXT_KERNEL:
in_kernel = true;
break;
case PERF_CONTEXT_USER:
in_kernel = false;
break;
default:
LOG(ERROR) << "Unexpected perf_context in callchain: " << ip;
}
} else {
if (first_ip) {
// Remove duplication with sampled ip.
if (ip == r.ip_data.ip) {
continue;
}
first_ip = false;
}
SampleEntry* sample =
sample_tree_->AddCallChainSample(r.tid_data.pid, r.tid_data.tid, ip, r.time_data.time,
r.period_data.period, in_kernel, callchain);
callchain.push_back(sample);
}
}
if (print_callgraph_) {
std::set<SampleEntry*> added_set;
while (callchain.size() >= 2) {
SampleEntry* sample = callchain[0];
callchain.erase(callchain.begin());
// Add only once for recursive calls on callchain.
if (added_set.find(sample) != added_set.end()) {
continue;
}
added_set.insert(sample);
sample_tree_->InsertCallChainForSample(sample, callchain, r.period_data.period);
}
}
}
}
}
