1 #include "llvm/Support/DebugCounter.h"
2 #include "llvm/Support/CommandLine.h"
3 #include "llvm/Support/Format.h"
4 #include "llvm/Support/ManagedStatic.h"
5 #include "llvm/Support/Options.h"
9 // This class overrides the default list implementation of printing so we
10 // can pretty print the list of debug counter options. This type of
11 // dynamic option is pretty rare (basically this and pass lists).
12 class DebugCounterList : public cl::list<std::string, DebugCounter> {
14 using Base = cl::list<std::string, DebugCounter>;
17 template <class... Mods>
18 explicit DebugCounterList(Mods &&... Ms) : Base(std::forward<Mods>(Ms)...) {}
21 void printOptionInfo(size_t GlobalWidth) const override {
22 // This is a variant of from generic_parser_base::printOptionInfo. Sadly,
23 // it's not easy to make it more usable. We could get it to print these as
24 // options if we were a cl::opt and registered them, but lists don't have
25 // options, nor does the parser for std::string. The other mechanisms for
26 // options are global and would pollute the global namespace with our
27 // counters. Rather than go that route, we have just overridden the
28 // printing, which only a few things call anyway.
29 outs() << " -" << ArgStr;
30 // All of the other options in CommandLine.cpp use ArgStr.size() + 6 for
31 // width, so we do the same.
32 Option::printHelpStr(HelpStr, GlobalWidth, ArgStr.size() + 6);
33 const auto &CounterInstance = DebugCounter::instance();
34 for (auto Name : CounterInstance) {
36 CounterInstance.getCounterInfo(CounterInstance.getCounterId(Name));
37 size_t NumSpaces = GlobalWidth - Info.first.size() - 8;
38 outs() << " =" << Info.first;
39 outs().indent(NumSpaces) << " - " << Info.second << '\n';
44 // Create our command line option.
45 static DebugCounterList DebugCounterOption(
47 cl::desc("Comma separated list of debug counter skip and count"),
48 cl::CommaSeparated, cl::ZeroOrMore, cl::location(DebugCounter::instance()));
50 static ManagedStatic<DebugCounter> DC;
52 DebugCounter &DebugCounter::instance() { return *DC; }
54 // This is called by the command line parser when it sees a value for the
55 // debug-counter option defined above.
56 void DebugCounter::push_back(const std::string &Val) {
59 // The strings should come in as counter=value
60 auto CounterPair = StringRef(Val).split('=');
61 if (CounterPair.second.empty()) {
62 errs() << "DebugCounter Error: " << Val << " does not have an = in it\n";
65 // Now we have counter=value.
66 // First, process value.
68 if (CounterPair.second.getAsInteger(0, CounterVal)) {
69 errs() << "DebugCounter Error: " << CounterPair.second
70 << " is not a number\n";
73 // Now we need to see if this is the skip or the count, remove the suffix, and
74 // add it to the counter values.
75 if (CounterPair.first.endswith("-skip")) {
76 auto CounterName = CounterPair.first.drop_back(5);
77 unsigned CounterID = RegisteredCounters.idFor(CounterName);
79 errs() << "DebugCounter Error: " << CounterName
80 << " is not a registered counter\n";
84 auto Res = Counters.insert({CounterID, {0, -1}});
85 Res.first->second.first = CounterVal;
86 } else if (CounterPair.first.endswith("-count")) {
87 auto CounterName = CounterPair.first.drop_back(6);
88 unsigned CounterID = RegisteredCounters.idFor(CounterName);
90 errs() << "DebugCounter Error: " << CounterName
91 << " is not a registered counter\n";
95 auto Res = Counters.insert({CounterID, {0, -1}});
96 Res.first->second.second = CounterVal;
98 errs() << "DebugCounter Error: " << CounterPair.first
99 << " does not end with -skip or -count\n";
103 void DebugCounter::print(raw_ostream &OS) {
104 OS << "Counters and values:\n";
105 for (const auto &KV : Counters)
106 OS << left_justify(RegisteredCounters[KV.first], 32) << ": {"
107 << KV.second.first << "," << KV.second.second << "}\n";