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https://github.com/jart/cosmopolitan.git
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1ff9ab95ac
This change enables Address Sanitizer systemically w/ `make MODE=dbg`. Our version of Rust's `unsafe` keyword is named `noasan` which is used for two functions that do aligned memory chunking, like `strcpy.c` and we need to fix the tiny DEFLATE code, but that's it everything else is fabulous you can have all the fischer price security blankets you need Best of all is we're now able to use the ASAN data in Blinkenlights to colorize the memory dumps. See the screenshot below of a test program: https://justine.lol/blinkenlights/asan.png Which is operating on float arrays stored on the stack, with red areas indicating poisoned memory, and the green areas indicate valid memory.
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
#ifndef COSMOPOLITAN_LIBC_RUNTIME_MEMTRACK_H_
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#define COSMOPOLITAN_LIBC_RUNTIME_MEMTRACK_H_
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#include "libc/dce.h"
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#include "libc/macros.h"
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#include "libc/nt/enum/version.h"
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#include "libc/nt/struct/teb.h"
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#include "libc/runtime/runtime.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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#define _kAutomapStart 0x0000100080000000 // asan can't spread its poison here
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#define _kAutomapSize 0x00000fff80000000
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#define _kFixedmapStart 0x0000200000000000
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/*
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* TODO: Why can't we allocate addresses above 4GB on Windows 7 x64?
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* https://github.com/jart/cosmopolitan/issues/19
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*/
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#define MEMTRACK_ADDRESS(NORMAL, WIN7) \
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(!(IsWindows() && NtGetVersion() < kNtVersionWindows10) ? NORMAL : WIN7)
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#define kAutomapStart MEMTRACK_ADDRESS(_kAutomapStart, 0x10000000)
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#define kAutomapSize MEMTRACK_ADDRESS(_kAutomapSize, 0x40000000)
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#define kFixedmapStart MEMTRACK_ADDRESS(_kFixedmapStart, 0x40000000)
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struct MemoryIntervals {
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long i;
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struct MemoryInterval {
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int x;
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int y;
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long h;
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int prot;
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int flags;
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} p[128];
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};
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extern struct MemoryIntervals _mmi;
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unsigned FindMemoryInterval(const struct MemoryIntervals *, int) nosideeffect;
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bool AreMemoryIntervalsOk(const struct MemoryIntervals *) nosideeffect;
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void PrintMemoryIntervals(int, const struct MemoryIntervals *);
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int TrackMemoryInterval(struct MemoryIntervals *, int, int, long, int, int);
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int ReleaseMemoryIntervals(struct MemoryIntervals *, int, int,
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void (*)(struct MemoryIntervals *, int, int));
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void ReleaseMemoryNt(struct MemoryIntervals *, int, int);
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int UntrackMemoryIntervals(void *, size_t);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_RUNTIME_MEMTRACK_H_ */
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