[lib/Fuzzer] fully get rid of std::cerr in libFuzzer

llvm-svn: 238081

1 files changed, 17 insertions, 30 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerLoop.cpp b/llvm/lib/Fuzzer/FuzzerLoop.cpp
index d028f193eef..34ceda4fb4d 100644
--- a/llvm/lib/Fuzzer/FuzzerLoop.cpp
+++ b/llvm/lib/Fuzzer/FuzzerLoop.cpp
@@ -12,7 +12,6 @@
 #include "FuzzerInternal.h"
 #include <sanitizer/coverage_interface.h>
 #include <algorithm>
-#include <iostream>
 
 namespace fuzzer {
 
@@ -37,8 +36,7 @@ void Fuzzer::PrintUnitInASCIIOrTokens(const Unit &U, const char *PrintAfter) {
   } else {
     auto T = SubstituteTokens(U);
     T.push_back(0);
-    std::cerr << T.data();
-    std::cerr << PrintAfter;
+    Printf("%s%s", T.data(), PrintAfter);
   }
 }
 
@@ -48,7 +46,7 @@ void Fuzzer::StaticDeathCallback() {
 }
 
 void Fuzzer::DeathCallback() {
-  std::cerr << "DEATH: " <<  std::endl;
+  Printf("DEATH:\n");
   Print(CurrentUnit, "\n");
   PrintUnitInASCIIOrTokens(CurrentUnit, "\n");
   WriteToCrash(CurrentUnit, "crash-");
@@ -65,10 +63,9 @@ void Fuzzer::AlarmCallback() {
       duration_cast<seconds>(system_clock::now() - UnitStartTime).count();
   if (Seconds == 0) return;
   if (Options.Verbosity >= 2)
-    std::cerr << "AlarmCallback " << Seconds << "\n";
+    Printf("AlarmCallback %zd\n", Seconds);
   if (Seconds >= (size_t)Options.UnitTimeoutSec) {
-    std::cerr << "ALARM: working on the last Unit for " << Seconds << " seconds"
-              << std::endl;
+    Printf("ALARM: working on the last Unit for %zd seconds\n", Seconds);
     Print(CurrentUnit, "\n");
     PrintUnitInASCIIOrTokens(CurrentUnit, "\n");
     WriteToCrash(CurrentUnit, "timeout-");
@@ -80,14 +77,8 @@ void Fuzzer::PrintStats(const char *Where, size_t Cov, const char *End) {
   if (!Options.Verbosity) return;
   size_t Seconds = secondsSinceProcessStartUp();
   size_t ExecPerSec = (Seconds ? TotalNumberOfRuns / Seconds : 0);
-  std::cerr
-      << "#" << TotalNumberOfRuns
-      << "\t" << Where
-      << " cov " << Cov
-      << " bits " << TotalBits()
-      << " units " << Corpus.size()
-      << " exec/s " << ExecPerSec
-      << End;
+  Printf("#%zd\t%s cov %zd bits %zd units %zd exec/s %zd %s", TotalNumberOfRuns,
+         Where, Cov, TotalBits(), Corpus.size(), ExecPerSec, End);
 }
 
 void Fuzzer::RereadOutputCorpus() {
@@ -101,7 +92,7 @@ void Fuzzer::RereadOutputCorpus() {
   }
   if (!Options.Reload) return;
   if (Options.Verbosity >= 2)
-    std::cerr << "Reload: read " << AdditionalCorpus.size() << " new units.\n";
+    Printf("Reload: read %zd new units.\n",  AdditionalCorpus.size());
   for (auto &X : AdditionalCorpus) {
     if (X.size() > (size_t)Options.MaxLen)
       X.resize(Options.MaxLen);
@@ -124,7 +115,7 @@ void Fuzzer::ShuffleAndMinimize() {
       (Options.PreferSmallDuringInitialShuffle == 1 ||
        (Options.PreferSmallDuringInitialShuffle == -1 && rand() % 2));
   if (Options.Verbosity)
-    std::cerr << "PreferSmall: " << PreferSmall << "\n";
+    Printf("PreferSmall: %d\n", PreferSmall);
   PrintStats("READ  ", 0);
   std::vector<Unit> NewCorpus;
   std::random_shuffle(Corpus.begin(), Corpus.end());
@@ -143,9 +134,7 @@ void Fuzzer::ShuffleAndMinimize() {
         MaxCov = NewCoverage;
         NewCorpus.push_back(U);
         if (Options.Verbosity >= 2)
-          std::cerr << "NEW0: " << NewCoverage
-                    << " L " << U.size()
-                    << "\n";
+          Printf("NEW0: %zd L %zd\n", NewCoverage, U.size());
       }
     }
   }
@@ -168,8 +157,7 @@ size_t Fuzzer::RunOne(const Unit &U) {
       duration_cast<seconds>(UnitStopTime - UnitStartTime).count();
   if (TimeOfUnit > TimeOfLongestUnitInSeconds) {
     TimeOfLongestUnitInSeconds = TimeOfUnit;
-    std::cerr << "Longest unit: " << TimeOfLongestUnitInSeconds
-              << " s:\n";
+    Printf("Longest unit: %zd s:\n", TimeOfLongestUnitInSeconds);
     Print(U, "\n");
   }
   return Res;
@@ -255,14 +243,13 @@ void Fuzzer::WriteToOutputCorpus(const Unit &U) {
   std::string Path = DirPlusFile(Options.OutputCorpus, Hash(U));
   WriteToFile(U, Path);
   if (Options.Verbosity >= 2)
-    std::cerr << "Written to " << Path << std::endl;
+    Printf("Written to %s\n", Path.c_str());
 }
 
 void Fuzzer::WriteToCrash(const Unit &U, const char *Prefix) {
   std::string Path = Prefix + Hash(U);
   WriteToFile(U, Path);
-  std::cerr << "CRASHED; file written to " << Path << std::endl;
-  std::cerr << "Base64: ";
+  Printf("CRASHED; file written to %s\nBase64: ", Path.c_str());
   PrintFileAsBase64(Path);
 }
 
@@ -271,8 +258,8 @@ void Fuzzer::SaveCorpus() {
   for (const auto &U : Corpus)
     WriteToFile(U, DirPlusFile(Options.OutputCorpus, Hash(U)));
   if (Options.Verbosity)
-    std::cerr << "Written corpus of " << Corpus.size() << " files to "
-              << Options.OutputCorpus << "\n";
+    Printf("Written corpus of %zd files to %s\n", Corpus.size(),
+           Options.OutputCorpus.c_str());
 }
 
 void Fuzzer::ReportNewCoverage(size_t NewCoverage, const Unit &U) {
@@ -281,13 +268,13 @@ void Fuzzer::ReportNewCoverage(size_t NewCoverage, const Unit &U) {
   UnitHashesAddedToCorpus.insert(Hash(U));
   PrintStats("NEW   ", NewCoverage, "");
   if (Options.Verbosity) {
-    std::cerr << " L: " << U.size();
+    Printf(" L: %zd", U.size());
     if (U.size() < 30) {
-      std::cerr << " ";
+      Printf(" ");
       PrintUnitInASCIIOrTokens(U, "\t");
       Print(U);
     }
-    std::cerr << "\n";
+    Printf("\n");
   }
   WriteToOutputCorpus(U);
   if (Options.ExitOnFirst)