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//===-- scudo_flags.cpp -----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// Hardened Allocator flag parsing logic.
///
//===----------------------------------------------------------------------===//
#include "scudo_flags.h"
#include "scudo_utils.h"
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_flag_parser.h"
namespace __scudo {
Flags scudo_flags_dont_use_directly; // use via flags().
void Flags::setDefaults() {
#define SCUDO_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
#include "scudo_flags.inc"
#undef SCUDO_FLAG
}
static void RegisterScudoFlags(FlagParser *parser, Flags *f) {
#define SCUDO_FLAG(Type, Name, DefaultValue, Description) \
RegisterFlag(parser, #Name, Description, &f->Name);
#include "scudo_flags.inc"
#undef SCUDO_FLAG
}
void initFlags() {
SetCommonFlagsDefaults();
{
CommonFlags cf;
cf.CopyFrom(*common_flags());
cf.exitcode = 1;
OverrideCommonFlags(cf);
}
Flags *f = getFlags();
f->setDefaults();
FlagParser scudo_parser;
RegisterScudoFlags(&scudo_parser, f);
RegisterCommonFlags(&scudo_parser);
scudo_parser.ParseString(GetEnv("SCUDO_OPTIONS"));
InitializeCommonFlags();
// Sanity checks and default settings for the Quarantine parameters.
if (f->QuarantineSizeMb < 0) {
const int DefaultQuarantineSizeMb = 64;
f->QuarantineSizeMb = DefaultQuarantineSizeMb;
}
// We enforce an upper limit for the quarantine size of 4Gb.
if (f->QuarantineSizeMb > (4 * 1024)) {
dieWithMessage("ERROR: the quarantine size is too large\n");
}
if (f->ThreadLocalQuarantineSizeKb < 0) {
const int DefaultThreadLocalQuarantineSizeKb = 1024;
f->ThreadLocalQuarantineSizeKb = DefaultThreadLocalQuarantineSizeKb;
}
// And an upper limit of 128Mb for the thread quarantine cache.
if (f->ThreadLocalQuarantineSizeKb > (128 * 1024)) {
dieWithMessage("ERROR: the per thread quarantine cache size is too "
"large\n");
}
}
Flags *getFlags() {
return &scudo_flags_dont_use_directly;
}
}
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