1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
//===-- 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"
extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
const char* __scudo_default_options();
namespace __scudo {
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 *callGetScudoDefaultOptions() {
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 user-specified string.
const char *ScudoDefaultOptions = callGetScudoDefaultOptions();
ScudoParser.ParseString(ScudoDefaultOptions);
// Override from environment.
ScudoParser.ParseString(GetEnv("SCUDO_OPTIONS"));
InitializeCommonFlags();
// Sanity checks and default settings for the Quarantine parameters.
if (f->QuarantineSizeMb < 0) {
const int DefaultQuarantineSizeMb = FIRST_32_SECOND_64(4, 16);
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 =
FIRST_32_SECOND_64(64, 256);
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");
}
if (f->ThreadLocalQuarantineSizeKb == 0 && f->QuarantineSizeMb > 0) {
dieWithMessage("ERROR: ThreadLocalQuarantineSizeKb can be set to 0 only "
"when QuarantineSizeMb is set to 0\n");
}
}
Flags *getFlags() {
return &ScudoFlags;
}
} // namespace __scudo
|
