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[libFuzzer] limit the size of the inputs printed to stderr

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243795 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany committed 2015-07-31 22:07:17 +00:00
1 parent cab56781b5
commit 427b5a50cf
1 file changed
+10 -4
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lib/Fuzzer/FuzzerLoop.cpp
+10 -4
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@@ -14,6 +14,7 @@
#include <algorithm> #include <algorithm>
namespace fuzzer { namespace fuzzer {
static const size_t kMaxUnitSizeToPrint = 4096;
// Only one Fuzzer per process. // Only one Fuzzer per process.
static Fuzzer *F; static Fuzzer *F;
@@ -68,7 +69,8 @@ void Fuzzer::AlarmCallback() {
Printf("ALARM: working on the last Unit for %zd seconds\n", Seconds); Printf("ALARM: working on the last Unit for %zd seconds\n", Seconds);
Printf(" and the timeout value is %d (use -timeout=N to change)\n", Printf(" and the timeout value is %d (use -timeout=N to change)\n",
Options.UnitTimeoutSec); Options.UnitTimeoutSec);
Print(CurrentUnit, "\n"); if (CurrentUnit.size() <= kMaxUnitSizeToPrint)
Print(CurrentUnit, "\n");
PrintUnitInASCIIOrTokens(CurrentUnit, "\n"); PrintUnitInASCIIOrTokens(CurrentUnit, "\n");
WriteUnitToFileWithPrefix(CurrentUnit, "timeout-"); WriteUnitToFileWithPrefix(CurrentUnit, "timeout-");
exit(1); exit(1);
@@ -160,7 +162,8 @@ size_t Fuzzer::RunOne(const Unit &U) {
if (TimeOfUnit > TimeOfLongestUnitInSeconds) { if (TimeOfUnit > TimeOfLongestUnitInSeconds) {
TimeOfLongestUnitInSeconds = TimeOfUnit; TimeOfLongestUnitInSeconds = TimeOfUnit;
Printf("Longest unit: %zd s:\n", TimeOfLongestUnitInSeconds); Printf("Longest unit: %zd s:\n", TimeOfLongestUnitInSeconds);
Print(U, "\n"); if (U.size() <= kMaxUnitSizeToPrint)
Print(U, "\n");
WriteUnitToFileWithPrefix(U, "long-running-unit-"); WriteUnitToFileWithPrefix(U, "long-running-unit-");
} }
return Res; return Res;
@@ -252,8 +255,11 @@ void Fuzzer::WriteToOutputCorpus(const Unit &U) {
void Fuzzer::WriteUnitToFileWithPrefix(const Unit &U, const char *Prefix) { void Fuzzer::WriteUnitToFileWithPrefix(const Unit &U, const char *Prefix) {
std::string Path = Prefix + Hash(U); std::string Path = Prefix + Hash(U);
WriteToFile(U, Path); WriteToFile(U, Path);
Printf("Test unit written to %s\nBase64: ", Path.c_str()); Printf("Test unit written to %s\n", Path.c_str());
PrintFileAsBase64(Path); if (U.size() <= kMaxUnitSizeToPrint) {
Printf("Base64: ");
PrintFileAsBase64(Path);
}
} }
void Fuzzer::SaveCorpus() { void Fuzzer::SaveCorpus() {