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#include "perf_data_converter.h"
#include "quipper/perf_parser.h"
#include <map>
using std::map;
namespace wireless_android_logging_awp {
typedef quipper::ParsedEvent::DSOAndOffset DSOAndOffset;
typedef std::vector<DSOAndOffset> callchain;
struct callchain_lt {
bool operator()(const callchain *c1, const callchain *c2) const {
if (c1->size() != c2->size()) {
return c1->size() < c2->size();
}
for (unsigned idx = 0; idx < c1->size(); ++idx) {
const DSOAndOffset *do1 = &(*c1)[idx];
const DSOAndOffset *do2 = &(*c2)[idx];
if (do1->offset() != do2->offset()) {
return do1->offset() < do2->offset();
}
int rc = do1->dso_name().compare(do2->dso_name());
if (rc) {
return rc < 0;
}
}
return false;
}
};
struct RangeTarget {
RangeTarget(uint64 start, uint64 end, uint64 to)
: start(start), end(end), to(to) {}
bool operator<(const RangeTarget &r) const {
if (start != r.start) {
return start < r.start;
} else if (end != r.end) {
return end < r.end;
} else {
return to < r.to;
}
}
uint64 start;
uint64 end;
uint64 to;
};
struct BinaryProfile {
map<uint64, uint64> address_count_map;
map<RangeTarget, uint64> range_count_map;
map<const callchain *, uint64, callchain_lt> callchain_count_map;
};
wireless_android_play_playlog::AndroidPerfProfile
RawPerfDataToAndroidPerfProfile(const string &perf_file) {
wireless_android_play_playlog::AndroidPerfProfile ret;
quipper::PerfParser parser;
if (!parser.ReadFile(perf_file) || !parser.ParseRawEvents()) {
return ret;
}
typedef map<string, BinaryProfile> ModuleProfileMap;
typedef map<string, ModuleProfileMap> ProgramProfileMap;
// Note: the callchain_count_map member in BinaryProfile contains
// pointers into callchains owned by "parser" above, meaning
// that once the parser is destroyed, callchain pointers in
// name_profile_map will become stale (e.g. keep these two
// together in the same region).
ProgramProfileMap name_profile_map;
uint64 total_samples = 0;
bool seen_branch_stack = false;
bool seen_callchain = false;
for (const auto &event : parser.parsed_events()) {
if (!event.raw_event ||
event.raw_event->header.type != PERF_RECORD_SAMPLE) {
continue;
}
string dso_name = event.dso_and_offset.dso_name();
string program_name = event.command();
const string kernel_name = "[kernel.kallsyms]";
if (dso_name.substr(0, kernel_name.length()) == kernel_name) {
dso_name = kernel_name;
if (program_name == "") {
program_name = "kernel";
}
} else if (program_name == "") {
program_name = "unknown_program";
}
total_samples++;
// We expect to see either all callchain events, all branch stack
// events, or all flat sample events, not a mix. For callchains,
// however, it can be the case that none of the IPs in a chain
// are mappable, in which case the parsed/mapped chain will appear
// empty (appearing as a flat sample).
if (!event.callchain.empty()) {
CHECK(!seen_branch_stack && "examining callchain");
seen_callchain = true;
const callchain *cc = &event.callchain;
name_profile_map[program_name][dso_name].callchain_count_map[cc]++;
} else if (!event.branch_stack.empty()) {
CHECK(!seen_callchain && "examining branch stack");
seen_branch_stack = true;
name_profile_map[program_name][dso_name].address_count_map[
event.dso_and_offset.offset()]++;
} else {
name_profile_map[program_name][dso_name].address_count_map[
event.dso_and_offset.offset()]++;
}
for (size_t i = 1; i < event.branch_stack.size(); i++) {
if (dso_name == event.branch_stack[i - 1].to.dso_name()) {
uint64 start = event.branch_stack[i].to.offset();
uint64 end = event.branch_stack[i - 1].from.offset();
uint64 to = event.branch_stack[i - 1].to.offset();
// The interval between two taken branches should not be too large.
if (end < start || end - start > (1 << 20)) {
LOG(WARNING) << "Bogus LBR data: " << start << "->" << end;
continue;
}
name_profile_map[program_name][dso_name].range_count_map[
RangeTarget(start, end, to)]++;
}
}
}
map<string, int> name_id_map;
for (const auto &program_profile : name_profile_map) {
for (const auto &module_profile : program_profile.second) {
name_id_map[module_profile.first] = 0;
}
}
int current_index = 0;
for (auto iter = name_id_map.begin(); iter != name_id_map.end(); ++iter) {
iter->second = current_index++;
}
map<string, string> name_buildid_map;
parser.GetFilenamesToBuildIDs(&name_buildid_map);
ret.set_total_samples(total_samples);
for (const auto &name_id : name_id_map) {
auto load_module = ret.add_load_modules();
load_module->set_name(name_id.first);
auto nbmi = name_buildid_map.find(name_id.first);
if (nbmi != name_buildid_map.end()) {
const std::string &build_id = nbmi->second;
if (build_id.size() == 40 && build_id.substr(32) == "00000000") {
load_module->set_build_id(build_id.substr(0, 32));
} else {
load_module->set_build_id(build_id);
}
}
}
for (const auto &program_profile : name_profile_map) {
auto program = ret.add_programs();
program->set_name(program_profile.first);
for (const auto &module_profile : program_profile.second) {
int32 module_id = name_id_map[module_profile.first];
auto module = program->add_modules();
module->set_load_module_id(module_id);
for (const auto &addr_count : module_profile.second.address_count_map) {
auto address_samples = module->add_address_samples();
address_samples->add_address(addr_count.first);
address_samples->set_count(addr_count.second);
}
for (const auto &range_count : module_profile.second.range_count_map) {
auto range_samples = module->add_range_samples();
range_samples->set_start(range_count.first.start);
range_samples->set_end(range_count.first.end);
range_samples->set_to(range_count.first.to);
range_samples->set_count(range_count.second);
}
for (const auto &callchain_count :
module_profile.second.callchain_count_map) {
auto address_samples = module->add_address_samples();
address_samples->set_count(callchain_count.second);
for (const auto &d_o : *callchain_count.first) {
int32 module_id = name_id_map[d_o.dso_name()];
address_samples->add_load_module_id(module_id);
address_samples->add_address(d_o.offset());
}
}
}
}
return ret;
}
} // namespace wireless_android_logging_awp
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