You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
137 lines
4.3 KiB
137 lines
4.3 KiB
//===-- scudo_flags.cpp -----------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// Hardened Allocator flag parsing logic.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "scudo_flags.h"
|
|
#include "scudo_interface_internal.h"
|
|
#include "scudo_utils.h"
|
|
|
|
#include "sanitizer_common/sanitizer_flags.h"
|
|
#include "sanitizer_common/sanitizer_flag_parser.h"
|
|
|
|
namespace __scudo {
|
|
|
|
static Flags ScudoFlags; // Use via getFlags().
|
|
|
|
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
|
|
}
|
|
|
|
static const char *getCompileDefinitionScudoDefaultOptions() {
|
|
#ifdef SCUDO_DEFAULT_OPTIONS
|
|
return SANITIZER_STRINGIFY(SCUDO_DEFAULT_OPTIONS);
|
|
#else
|
|
return "";
|
|
#endif
|
|
}
|
|
|
|
static const char *getScudoDefaultOptions() {
|
|
return (&__scudo_default_options) ? __scudo_default_options() : "";
|
|
}
|
|
|
|
void initFlags() {
|
|
SetCommonFlagsDefaults();
|
|
{
|
|
CommonFlags cf;
|
|
cf.CopyFrom(*common_flags());
|
|
cf.exitcode = 1;
|
|
OverrideCommonFlags(cf);
|
|
}
|
|
Flags *f = getFlags();
|
|
f->setDefaults();
|
|
|
|
FlagParser ScudoParser;
|
|
RegisterScudoFlags(&ScudoParser, f);
|
|
RegisterCommonFlags(&ScudoParser);
|
|
|
|
// Override from compile definition.
|
|
ScudoParser.ParseString(getCompileDefinitionScudoDefaultOptions());
|
|
|
|
// Override from user-specified string.
|
|
ScudoParser.ParseString(getScudoDefaultOptions());
|
|
|
|
// Override from environment.
|
|
ScudoParser.ParseStringFromEnv("SCUDO_OPTIONS");
|
|
|
|
InitializeCommonFlags();
|
|
|
|
// Sanity checks and default settings for the Quarantine parameters.
|
|
|
|
if (f->QuarantineSizeMb >= 0) {
|
|
// Backward compatible logic if QuarantineSizeMb is set.
|
|
if (f->QuarantineSizeKb >= 0) {
|
|
dieWithMessage("ERROR: please use either QuarantineSizeMb (deprecated) "
|
|
"or QuarantineSizeKb, but not both\n");
|
|
}
|
|
if (f->QuarantineChunksUpToSize >= 0) {
|
|
dieWithMessage("ERROR: QuarantineChunksUpToSize cannot be used in "
|
|
" conjunction with the deprecated QuarantineSizeMb option\n");
|
|
}
|
|
// If everything is in order, update QuarantineSizeKb accordingly.
|
|
f->QuarantineSizeKb = f->QuarantineSizeMb * 1024;
|
|
} else {
|
|
// Otherwise proceed with the new options.
|
|
if (f->QuarantineSizeKb < 0) {
|
|
const int DefaultQuarantineSizeKb = FIRST_32_SECOND_64(64, 256);
|
|
f->QuarantineSizeKb = DefaultQuarantineSizeKb;
|
|
}
|
|
if (f->QuarantineChunksUpToSize < 0) {
|
|
const int DefaultQuarantineChunksUpToSize = FIRST_32_SECOND_64(512, 2048);
|
|
f->QuarantineChunksUpToSize = DefaultQuarantineChunksUpToSize;
|
|
}
|
|
}
|
|
|
|
// We enforce an upper limit for the chunk quarantine threshold of 4Mb.
|
|
if (f->QuarantineChunksUpToSize > (4 * 1024 * 1024)) {
|
|
dieWithMessage("ERROR: the chunk quarantine threshold is too large\n");
|
|
}
|
|
|
|
// We enforce an upper limit for the quarantine size of 32Mb.
|
|
if (f->QuarantineSizeKb > (32 * 1024)) {
|
|
dieWithMessage("ERROR: the quarantine size is too large\n");
|
|
}
|
|
|
|
if (f->ThreadLocalQuarantineSizeKb < 0) {
|
|
const int DefaultThreadLocalQuarantineSizeKb = FIRST_32_SECOND_64(16, 64);
|
|
f->ThreadLocalQuarantineSizeKb = DefaultThreadLocalQuarantineSizeKb;
|
|
}
|
|
// And an upper limit of 8Mb for the thread quarantine cache.
|
|
if (f->ThreadLocalQuarantineSizeKb > (8 * 1024)) {
|
|
dieWithMessage("ERROR: the per thread quarantine cache size is too "
|
|
"large\n");
|
|
}
|
|
if (f->ThreadLocalQuarantineSizeKb == 0 && f->QuarantineSizeKb > 0) {
|
|
dieWithMessage("ERROR: ThreadLocalQuarantineSizeKb can be set to 0 only "
|
|
"when QuarantineSizeKb is set to 0\n");
|
|
}
|
|
}
|
|
|
|
Flags *getFlags() {
|
|
return &ScudoFlags;
|
|
}
|
|
|
|
} // namespace __scudo
|
|
|
|
#if !SANITIZER_SUPPORTS_WEAK_HOOKS
|
|
SANITIZER_INTERFACE_WEAK_DEF(const char*, __scudo_default_options, void) {
|
|
return "";
|
|
}
|
|
#endif
|