forked from OSchip/llvm-project
382 lines
18 KiB
C++
382 lines
18 KiB
C++
//===-- msan.h --------------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of MemorySanitizer.
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//
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// Private MSan header.
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//===----------------------------------------------------------------------===//
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#ifndef MSAN_H
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#define MSAN_H
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#include "sanitizer_common/sanitizer_flags.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "msan_interface_internal.h"
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#include "msan_flags.h"
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#include "ubsan/ubsan_platform.h"
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#ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
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# define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
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#endif
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#ifndef MSAN_CONTAINS_UBSAN
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# define MSAN_CONTAINS_UBSAN CAN_SANITIZE_UB
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#endif
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struct MappingDesc {
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uptr start;
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uptr end;
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enum Type {
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INVALID, APP, SHADOW, ORIGIN
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} type;
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const char *name;
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};
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#if SANITIZER_LINUX && defined(__mips64)
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// MIPS64 maps:
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// - 0x0000000000-0x0200000000: Program own segments
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// - 0xa200000000-0xc000000000: PIE program segments
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// - 0xe200000000-0xffffffffff: libraries segments.
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const MappingDesc kMemoryLayout[] = {
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{0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "app-1"},
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{0x000200000000ULL, 0x002200000000ULL, MappingDesc::INVALID, "invalid"},
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{0x002200000000ULL, 0x004000000000ULL, MappingDesc::SHADOW, "shadow-2"},
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{0x004000000000ULL, 0x004200000000ULL, MappingDesc::INVALID, "invalid"},
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{0x004200000000ULL, 0x006000000000ULL, MappingDesc::ORIGIN, "origin-2"},
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{0x006000000000ULL, 0x006200000000ULL, MappingDesc::INVALID, "invalid"},
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{0x006200000000ULL, 0x008000000000ULL, MappingDesc::SHADOW, "shadow-3"},
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{0x008000000000ULL, 0x008200000000ULL, MappingDesc::SHADOW, "shadow-1"},
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{0x008200000000ULL, 0x00a000000000ULL, MappingDesc::ORIGIN, "origin-3"},
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{0x00a000000000ULL, 0x00a200000000ULL, MappingDesc::ORIGIN, "origin-1"},
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{0x00a200000000ULL, 0x00c000000000ULL, MappingDesc::APP, "app-2"},
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{0x00c000000000ULL, 0x00e200000000ULL, MappingDesc::INVALID, "invalid"},
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{0x00e200000000ULL, 0x00ffffffffffULL, MappingDesc::APP, "app-3"}};
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#define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x8000000000ULL)
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#define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x2000000000ULL)
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#elif SANITIZER_LINUX && defined(__aarch64__)
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// The mapping describes both 39-bits, 42-bits, and 48-bits VMA. AArch64
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// maps:
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// - 0x0000000000000-0x0000010000000: 39/42/48-bits program own segments
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// - 0x0005500000000-0x0005600000000: 39-bits PIE program segments
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// - 0x0007f80000000-0x0007fffffffff: 39-bits libraries segments
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// - 0x002aa00000000-0x002ab00000000: 42-bits PIE program segments
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// - 0x003ff00000000-0x003ffffffffff: 42-bits libraries segments
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// - 0x0aaaaa0000000-0x0aaab00000000: 48-bits PIE program segments
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// - 0xffff000000000-0x1000000000000: 48-bits libraries segments
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// It is fragmented in multiples segments to increase the memory available
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// on 42-bits (12.21% of total VMA available for 42-bits and 13.28 for
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// 39 bits). The 48-bits segments only cover the usual PIE/default segments
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// plus some more segments (262144GB total, 0.39% total VMA).
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const MappingDesc kMemoryLayout[] = {
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{0x00000000000ULL, 0x01000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x01000000000ULL, 0x02000000000ULL, MappingDesc::SHADOW, "shadow-2"},
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{0x02000000000ULL, 0x03000000000ULL, MappingDesc::ORIGIN, "origin-2"},
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{0x03000000000ULL, 0x04000000000ULL, MappingDesc::SHADOW, "shadow-1"},
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{0x04000000000ULL, 0x05000000000ULL, MappingDesc::ORIGIN, "origin-1"},
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{0x05000000000ULL, 0x06000000000ULL, MappingDesc::APP, "app-1"},
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{0x06000000000ULL, 0x07000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x07000000000ULL, 0x08000000000ULL, MappingDesc::APP, "app-2"},
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{0x08000000000ULL, 0x09000000000ULL, MappingDesc::INVALID, "invalid"},
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// The mappings below are used only for 42-bits VMA.
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{0x09000000000ULL, 0x0A000000000ULL, MappingDesc::SHADOW, "shadow-3"},
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{0x0A000000000ULL, 0x0B000000000ULL, MappingDesc::ORIGIN, "origin-3"},
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{0x0B000000000ULL, 0x0F000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0F000000000ULL, 0x10000000000ULL, MappingDesc::APP, "app-3"},
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{0x10000000000ULL, 0x11000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x11000000000ULL, 0x12000000000ULL, MappingDesc::APP, "app-4"},
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{0x12000000000ULL, 0x17000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x17000000000ULL, 0x18000000000ULL, MappingDesc::SHADOW, "shadow-4"},
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{0x18000000000ULL, 0x19000000000ULL, MappingDesc::ORIGIN, "origin-4"},
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{0x19000000000ULL, 0x20000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x20000000000ULL, 0x21000000000ULL, MappingDesc::APP, "app-5"},
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{0x21000000000ULL, 0x26000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x26000000000ULL, 0x27000000000ULL, MappingDesc::SHADOW, "shadow-5"},
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{0x27000000000ULL, 0x28000000000ULL, MappingDesc::ORIGIN, "origin-5"},
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{0x28000000000ULL, 0x29000000000ULL, MappingDesc::SHADOW, "shadow-7"},
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{0x29000000000ULL, 0x2A000000000ULL, MappingDesc::ORIGIN, "origin-7"},
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{0x2A000000000ULL, 0x2B000000000ULL, MappingDesc::APP, "app-6"},
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{0x2B000000000ULL, 0x2C000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x2C000000000ULL, 0x2D000000000ULL, MappingDesc::SHADOW, "shadow-6"},
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{0x2D000000000ULL, 0x2E000000000ULL, MappingDesc::ORIGIN, "origin-6"},
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{0x2E000000000ULL, 0x2F000000000ULL, MappingDesc::APP, "app-7"},
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{0x2F000000000ULL, 0x39000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x39000000000ULL, 0x3A000000000ULL, MappingDesc::SHADOW, "shadow-9"},
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{0x3A000000000ULL, 0x3B000000000ULL, MappingDesc::ORIGIN, "origin-9"},
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{0x3B000000000ULL, 0x3C000000000ULL, MappingDesc::APP, "app-8"},
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{0x3C000000000ULL, 0x3D000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x3D000000000ULL, 0x3E000000000ULL, MappingDesc::SHADOW, "shadow-8"},
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{0x3E000000000ULL, 0x3F000000000ULL, MappingDesc::ORIGIN, "origin-8"},
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{0x3F000000000ULL, 0x40000000000ULL, MappingDesc::APP, "app-9"},
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// The mappings below are used only for 48-bits VMA.
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// TODO(unknown): 48-bit mapping ony covers the usual PIE, non-PIE
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// segments and some more segments totalizing 262144GB of VMA (which cover
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// only 0.32% of all 48-bit VMA). Memory avaliability can be increase by
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// adding multiple application segments like 39 and 42 mapping.
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{0x0040000000000ULL, 0x0041000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0041000000000ULL, 0x0042000000000ULL, MappingDesc::APP, "app-10"},
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{0x0042000000000ULL, 0x0047000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0047000000000ULL, 0x0048000000000ULL, MappingDesc::SHADOW, "shadow-10"},
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{0x0048000000000ULL, 0x0049000000000ULL, MappingDesc::ORIGIN, "origin-10"},
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{0x0049000000000ULL, 0x0050000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0050000000000ULL, 0x0051000000000ULL, MappingDesc::APP, "app-11"},
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{0x0051000000000ULL, 0x0056000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0056000000000ULL, 0x0057000000000ULL, MappingDesc::SHADOW, "shadow-11"},
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{0x0057000000000ULL, 0x0058000000000ULL, MappingDesc::ORIGIN, "origin-11"},
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{0x0058000000000ULL, 0x0059000000000ULL, MappingDesc::APP, "app-12"},
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{0x0059000000000ULL, 0x005E000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x005E000000000ULL, 0x005F000000000ULL, MappingDesc::SHADOW, "shadow-12"},
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{0x005F000000000ULL, 0x0060000000000ULL, MappingDesc::ORIGIN, "origin-12"},
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{0x0060000000000ULL, 0x0061000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0061000000000ULL, 0x0062000000000ULL, MappingDesc::APP, "app-13"},
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{0x0062000000000ULL, 0x0067000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0067000000000ULL, 0x0068000000000ULL, MappingDesc::SHADOW, "shadow-13"},
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{0x0068000000000ULL, 0x0069000000000ULL, MappingDesc::ORIGIN, "origin-13"},
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{0x0069000000000ULL, 0x0AAAAA0000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0AAAAA0000000ULL, 0x0AAAB00000000ULL, MappingDesc::APP, "app-14"},
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{0x0AAAB00000000ULL, 0x0AACAA0000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0AACAA0000000ULL, 0x0AACB00000000ULL, MappingDesc::SHADOW, "shadow-14"},
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{0x0AACB00000000ULL, 0x0AADAA0000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0AADAA0000000ULL, 0x0AADB00000000ULL, MappingDesc::ORIGIN, "origin-14"},
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{0x0AADB00000000ULL, 0x0FF9F00000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0FF9F00000000ULL, 0x0FFA000000000ULL, MappingDesc::SHADOW, "shadow-15"},
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{0x0FFA000000000ULL, 0x0FFAF00000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0FFAF00000000ULL, 0x0FFB000000000ULL, MappingDesc::ORIGIN, "origin-15"},
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{0x0FFB000000000ULL, 0x0FFFF00000000ULL, MappingDesc::INVALID, "invalid"},
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{0x0FFFF00000000ULL, 0x1000000000000ULL, MappingDesc::APP, "app-15"},
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};
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# define MEM_TO_SHADOW(mem) ((uptr)mem ^ 0x6000000000ULL)
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# define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x1000000000ULL)
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#elif SANITIZER_LINUX && SANITIZER_PPC64
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const MappingDesc kMemoryLayout[] = {
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{0x000000000000ULL, 0x000100000000ULL, MappingDesc::APP, "low memory"},
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{0x000100000000ULL, 0x080000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x080000000000ULL, 0x180100000000ULL, MappingDesc::SHADOW, "shadow"},
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{0x180100000000ULL, 0x1C0000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x1C0000000000ULL, 0x2C0100000000ULL, MappingDesc::ORIGIN, "origin"},
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{0x2C0100000000ULL, 0x300000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x300000000000ULL, 0x400000000000ULL, MappingDesc::APP, "high memory"}};
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// Maps low and high app ranges to contiguous space with zero base:
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// Low: 0000 0000 0000 - 0000 ffff ffff -> 1000 0000 0000 - 1000 ffff ffff
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// High: 3000 0000 0000 - 3fff ffff ffff -> 0000 0000 0000 - 0fff ffff ffff
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#define LINEARIZE_MEM(mem) \
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(((uptr)(mem) & ~0x200000000000ULL) ^ 0x100000000000ULL)
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#define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x080000000000ULL)
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#define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x140000000000ULL)
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#elif SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 64
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// Low memory: main binary, MAP_32BIT mappings and modules
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// High memory: heap, modules and main thread stack
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const MappingDesc kMemoryLayout[] = {
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{0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "low memory"},
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{0x010000000000ULL, 0x100000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x100000000000ULL, 0x310000000000ULL, MappingDesc::SHADOW, "shadow"},
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{0x310000000000ULL, 0x380000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x380000000000ULL, 0x590000000000ULL, MappingDesc::ORIGIN, "origin"},
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{0x590000000000ULL, 0x600000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}};
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// Maps low and high app ranges to contiguous space with zero base:
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// Low: 0000 0000 0000 - 00ff ffff ffff -> 2000 0000 0000 - 20ff ffff ffff
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// High: 6000 0000 0000 - 7fff ffff ffff -> 0000 0000 0000 - 1fff ffff ffff
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#define LINEARIZE_MEM(mem) \
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(((uptr)(mem) & ~0xc00000000000ULL) ^ 0x200000000000ULL)
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#define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x100000000000ULL)
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#define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x280000000000)
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#elif SANITIZER_LINUX && SANITIZER_WORDSIZE == 64
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#ifdef MSAN_LINUX_X86_64_OLD_MAPPING
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// Requries PIE binary and ASLR enabled.
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// Main thread stack and DSOs at 0x7f0000000000 (sometimes 0x7e0000000000).
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// Heap at 0x600000000000.
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const MappingDesc kMemoryLayout[] = {
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{0x000000000000ULL, 0x200000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x200000000000ULL, 0x400000000000ULL, MappingDesc::SHADOW, "shadow"},
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{0x400000000000ULL, 0x600000000000ULL, MappingDesc::ORIGIN, "origin"},
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{0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app"}};
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#define MEM_TO_SHADOW(mem) (((uptr)(mem)) & ~0x400000000000ULL)
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#define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x200000000000ULL)
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#else // MSAN_LINUX_X86_64_OLD_MAPPING
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// All of the following configurations are supported.
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// ASLR disabled: main executable and DSOs at 0x555550000000
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// PIE and ASLR: main executable and DSOs at 0x7f0000000000
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// non-PIE: main executable below 0x100000000, DSOs at 0x7f0000000000
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// Heap at 0x700000000000.
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const MappingDesc kMemoryLayout[] = {
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{0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "app-1"},
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{0x010000000000ULL, 0x100000000000ULL, MappingDesc::SHADOW, "shadow-2"},
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{0x100000000000ULL, 0x110000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x110000000000ULL, 0x200000000000ULL, MappingDesc::ORIGIN, "origin-2"},
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{0x200000000000ULL, 0x300000000000ULL, MappingDesc::SHADOW, "shadow-3"},
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{0x300000000000ULL, 0x400000000000ULL, MappingDesc::ORIGIN, "origin-3"},
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{0x400000000000ULL, 0x500000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x500000000000ULL, 0x510000000000ULL, MappingDesc::SHADOW, "shadow-1"},
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{0x510000000000ULL, 0x600000000000ULL, MappingDesc::APP, "app-2"},
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{0x600000000000ULL, 0x610000000000ULL, MappingDesc::ORIGIN, "origin-1"},
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{0x610000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"},
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{0x700000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app-3"}};
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#define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x500000000000ULL)
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#define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x100000000000ULL)
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#endif // MSAN_LINUX_X86_64_OLD_MAPPING
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#else
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#error "Unsupported platform"
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#endif
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const uptr kMemoryLayoutSize = sizeof(kMemoryLayout) / sizeof(kMemoryLayout[0]);
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#define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem))))
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#ifndef __clang__
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__attribute__((optimize("unroll-loops")))
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#endif
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inline bool addr_is_type(uptr addr, MappingDesc::Type mapping_type) {
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// It is critical for performance that this loop is unrolled (because then it is
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// simplified into just a few constant comparisons).
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#ifdef __clang__
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#pragma unroll
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#endif
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for (unsigned i = 0; i < kMemoryLayoutSize; ++i)
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if (kMemoryLayout[i].type == mapping_type &&
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addr >= kMemoryLayout[i].start && addr < kMemoryLayout[i].end)
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return true;
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return false;
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}
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#define MEM_IS_APP(mem) addr_is_type((uptr)(mem), MappingDesc::APP)
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#define MEM_IS_SHADOW(mem) addr_is_type((uptr)(mem), MappingDesc::SHADOW)
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#define MEM_IS_ORIGIN(mem) addr_is_type((uptr)(mem), MappingDesc::ORIGIN)
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// These constants must be kept in sync with the ones in MemorySanitizer.cc.
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const int kMsanParamTlsSize = 800;
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const int kMsanRetvalTlsSize = 800;
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namespace __msan {
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extern int msan_inited;
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extern bool msan_init_is_running;
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extern int msan_report_count;
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bool ProtectRange(uptr beg, uptr end);
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bool InitShadow(bool init_origins);
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char *GetProcSelfMaps();
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void InitializeInterceptors();
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void MsanAllocatorInit();
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void MsanAllocatorThreadFinish();
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void *MsanCalloc(StackTrace *stack, uptr nmemb, uptr size);
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void *MsanReallocate(StackTrace *stack, void *oldp, uptr size,
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uptr alignment, bool zeroise);
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void MsanDeallocate(StackTrace *stack, void *ptr);
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void InstallTrapHandler();
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void InstallAtExitHandler();
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const char *GetStackOriginDescr(u32 id, uptr *pc);
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void EnterSymbolizer();
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void ExitSymbolizer();
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bool IsInSymbolizer();
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struct SymbolizerScope {
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SymbolizerScope() { EnterSymbolizer(); }
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~SymbolizerScope() { ExitSymbolizer(); }
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};
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void PrintWarning(uptr pc, uptr bp);
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void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
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void GetStackTrace(BufferedStackTrace *stack, uptr max_s, uptr pc, uptr bp,
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bool request_fast_unwind);
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void ReportUMR(StackTrace *stack, u32 origin);
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void ReportExpectedUMRNotFound(StackTrace *stack);
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void ReportStats();
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void ReportAtExitStatistics();
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void DescribeMemoryRange(const void *x, uptr size);
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void ReportUMRInsideAddressRange(const char *what, const void *start, uptr size,
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uptr offset);
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// Unpoison first n function arguments.
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void UnpoisonParam(uptr n);
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void UnpoisonThreadLocalState();
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// Returns a "chained" origin id, pointing to the given stack trace followed by
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// the previous origin id.
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u32 ChainOrigin(u32 id, StackTrace *stack);
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const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1;
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#define GET_MALLOC_STACK_TRACE \
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BufferedStackTrace stack; \
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if (__msan_get_track_origins() && msan_inited) \
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GetStackTrace(&stack, common_flags()->malloc_context_size, \
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StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), \
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common_flags()->fast_unwind_on_malloc)
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#define GET_STORE_STACK_TRACE_PC_BP(pc, bp) \
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BufferedStackTrace stack; \
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if (__msan_get_track_origins() > 1 && msan_inited) \
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GetStackTrace(&stack, flags()->store_context_size, pc, bp, \
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common_flags()->fast_unwind_on_malloc)
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#define GET_FATAL_STACK_TRACE_PC_BP(pc, bp) \
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|
BufferedStackTrace stack; \
|
|
if (msan_inited) \
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|
GetStackTrace(&stack, kStackTraceMax, pc, bp, \
|
|
common_flags()->fast_unwind_on_fatal)
|
|
|
|
#define GET_STORE_STACK_TRACE \
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|
GET_STORE_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
|
|
|
|
class ScopedThreadLocalStateBackup {
|
|
public:
|
|
ScopedThreadLocalStateBackup() { Backup(); }
|
|
~ScopedThreadLocalStateBackup() { Restore(); }
|
|
void Backup();
|
|
void Restore();
|
|
private:
|
|
u64 va_arg_overflow_size_tls;
|
|
};
|
|
|
|
void MsanTSDInit(void (*destructor)(void *tsd));
|
|
void *MsanTSDGet();
|
|
void MsanTSDSet(void *tsd);
|
|
void MsanTSDDtor(void *tsd);
|
|
|
|
} // namespace __msan
|
|
|
|
#define MSAN_MALLOC_HOOK(ptr, size) \
|
|
do { \
|
|
if (&__sanitizer_malloc_hook) { \
|
|
UnpoisonParam(2); \
|
|
__sanitizer_malloc_hook(ptr, size); \
|
|
} \
|
|
RunMallocHooks(ptr, size); \
|
|
} while (false)
|
|
#define MSAN_FREE_HOOK(ptr) \
|
|
do { \
|
|
if (&__sanitizer_free_hook) { \
|
|
UnpoisonParam(1); \
|
|
__sanitizer_free_hook(ptr); \
|
|
} \
|
|
RunFreeHooks(ptr); \
|
|
} while (false)
|
|
|
|
#endif // MSAN_H
|