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19074450ee
This patch enabled msan for aarch64 with 39-bit VMA and 42-bit VMA.
As defined by lib/msan/msan.h the memory layout used is for 39-bit is:
00 0000 0000 - 40 0000 0000: invalid
40 0000 0000 - 43 0000 0000: shadow
43 0000 0000 - 46 0000 0000: origin
46 0000 0000 - 55 0000 0000: invalid
55 0000 0000 - 56 0000 0000: app (low)
56 0000 0000 - 70 0000 0000: invalid
70 0000 0000 - 80 0000 0000: app (high)
And for 42-bit VMA:
000 0000 0000 - 100 0000 0000: invalid
100 0000 0000 - 11b 0000 0000: shadow
11b 0000 0000 - 120 0000 0000: invalid
120 0000 0000 - 13b 0000 0000: origin
13b 0000 0000 - 2aa 0000 0000: invalid
2aa 0000 0000 - 2ab 0000 0000: app (low)
2ab 0000 0000 - 3f0 0000 0000: invalid
3f0 0000 0000 - 400 0000 0000: app (high)
Most of tests are passing with exception of:
* Linux/mallinfo.cc
* chained_origin_limits.cc
* dlerror.cc
* param_tls_limit.cc
* signal_stress_test.cc
* nonnull-arg.cpp
The 'Linux/mallinfo.cc' is due the fact AArch64 returns the sret in 'x8'
instead of default first argument 'x1'. So a function prototype that
aims to mimic (by using first argument as the return of function) won't
work. For GCC one can make a register alias (register var asm ("r8")), but
for clang it detects is an unused variable and generate wrong code.
The 'chained_origin_limits' is probably due a wrong code generation,
since it fails only when origin memory is used
(-fsanitize-memory-track-origins=2) and only in the returned code
(return buf[50]).
The 'signal_streess_test' and 'nonnull-arg' are due currently missing variadic
argument handling in memory sanitizer code instrumentation on LLVM side.
Both 'dlerror' and 'param_tls_test' are unknown failures that require
further investigation.
All the failures are XFAIL for aarch64 for now.
llvm-svn: 247809
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
// Test mmap behavior when map address is below shadow range.
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// With MAP_FIXED, we return EINVAL.
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// Without MAP_FIXED, we ignore the address hint and map somewhere in
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// application range.
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// RUN: %clangxx_msan -O0 -DFIXED=0 %s -o %t && %run %t
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// RUN: %clangxx_msan -O0 -DFIXED=1 %s -o %t && %run %t
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// RUN: %clangxx_msan -O0 -DFIXED=0 -D_FILE_OFFSET_BITS=64 %s -o %t && %run %t
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// RUN: %clangxx_msan -O0 -DFIXED=1 -D_FILE_OFFSET_BITS=64 %s -o %t && %run %t
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#include <assert.h>
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#include <errno.h>
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#include <stdint.h>
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#include <sys/mman.h>
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int main(void) {
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// Hint address just below shadow.
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#if defined(__FreeBSD__) && defined(__x86_64__)
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uintptr_t hint = 0x0f0000000000ULL;
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const uintptr_t app_start = 0x000000000000ULL;
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#elif defined(__x86_64__)
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uintptr_t hint = 0x4f0000000000ULL;
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const uintptr_t app_start = 0x600000000000ULL;
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#elif defined (__mips64)
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uintptr_t hint = 0x4f00000000ULL;
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const uintptr_t app_start = 0x6000000000ULL;
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#elif defined (__powerpc64__)
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uintptr_t hint = 0x2f0000000000ULL;
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const uintptr_t app_start = 0x300000000000ULL;
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#elif defined (__aarch64__)
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uintptr_t hint = 0x4f0000000ULL;
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const uintptr_t app_start = 0x7000000000ULL;
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#endif
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uintptr_t p = (uintptr_t)mmap(
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(void *)hint, 4096, PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS | (FIXED ? MAP_FIXED : 0), -1, 0);
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if (FIXED)
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assert(p == (uintptr_t)-1 && errno == EINVAL);
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else
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assert(p >= app_start);
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return 0;
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}
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