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Brofiler.cc
150 lines (122 loc) · 3.06 KB
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Brofiler.cc
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#include <cstdio>
#include <cstring>
#include <sstream>
#include <fstream>
#include <utility>
#include <algorithm>
#include <sys/stat.h>
#include "Brofiler.h"
#include "util.h"
Brofiler::Brofiler()
: ignoring(0), delim('\t')
{
}
Brofiler::~Brofiler()
{
for ( auto& s : stmts )
Unref(s);
}
void Brofiler::AddStmt(Stmt* s)
{
if ( ignoring != 0 )
return;
::Ref(s);
stmts.push_back(s);
}
bool Brofiler::ReadStats()
{
char* bf = zeekenv("ZEEK_PROFILER_FILE");
if ( ! bf )
return false;
std::ifstream ifs;
ifs.open(bf, std::ifstream::in);
if ( ! ifs )
return false;
std::stringstream ss;
ss << ifs.rdbuf();
std::string file_contents = ss.str();
ss.clear();
std::vector<std::string> lines;
tokenize_string(file_contents, "\n", &lines);
string delimiter;
delimiter = delim;
for ( const auto& line : lines )
{
if ( line.empty() )
continue;
std::vector<std::string> line_components;
tokenize_string(line, delimiter, &line_components);
if ( line_components.size() != 3 )
{
fprintf(stderr, "invalid ZEEK_PROFILER_FILE line: %s\n", line.data());
continue;
}
std::string& cnt = line_components[0];
std::string& location = line_components[1];
std::string& desc = line_components[2];
pair<string, string> location_desc(std::move(location), std::move(desc));
uint64_t count;
atoi_n(cnt.size(), cnt.c_str(), 0, 10, count);
usage_map.emplace(std::move(location_desc), count);
}
return true;
}
bool Brofiler::WriteStats()
{
char* bf = zeekenv("ZEEK_PROFILER_FILE");
if ( ! bf )
return false;
SafeDirname dirname{bf};
if ( ! ensure_intermediate_dirs(dirname.result.data()) )
{
reporter->Error("Failed to open ZEEK_PROFILER_FILE destination '%s' for writing", bf);
return false;
}
FILE* f;
const char* p = strstr(bf, "XXXXXX");
if ( p && ! p[6] )
{
mode_t old_umask = umask(S_IXUSR | S_IRWXO | S_IRWXG);
int fd = mkstemp(bf);
umask(old_umask);
if ( fd == -1 )
{
reporter->Error("Failed to generate unique file name from ZEEK_PROFILER_FILE: %s", bf);
return false;
}
f = fdopen(fd, "w");
}
else
{
f = fopen(bf, "w");
}
if ( ! f )
{
reporter->Error("Failed to open ZEEK_PROFILER_FILE destination '%s' for writing", bf);
return false;
}
for ( list<Stmt*>::const_iterator it = stmts.begin();
it != stmts.end(); ++it )
{
ODesc location_info;
(*it)->GetLocationInfo()->Describe(&location_info);
ODesc desc_info;
(*it)->Describe(&desc_info);
string desc(desc_info.Description());
canonicalize_desc cd{delim};
for_each(desc.begin(), desc.end(), cd);
pair<string, string> location_desc(location_info.Description(), desc);
if ( usage_map.find(location_desc) != usage_map.end() )
usage_map[location_desc] += (*it)->GetAccessCount();
else
usage_map[location_desc] = (*it)->GetAccessCount();
}
map<pair<string, string>, uint64_t >::const_iterator it;
for ( it = usage_map.begin(); it != usage_map.end(); ++it )
{
fprintf(f, "%" PRIu64"%c%s%c%s\n", it->second, delim,
it->first.first.c_str(), delim, it->first.second.c_str());
}
fclose(f);
return true;
}