forked from OSchip/llvm-project
78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
//===-- sanitizer_procmaps_linux.cc ---------------------------------------===//
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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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// Information about the process mappings (Linux-specific parts).
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//===----------------------------------------------------------------------===//
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#include "sanitizer_platform.h"
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#if SANITIZER_LINUX
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#include "sanitizer_common.h"
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#include "sanitizer_procmaps.h"
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namespace __sanitizer {
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void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
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ReadFileToBuffer("/proc/self/maps", &proc_maps->data, &proc_maps->mmaped_size,
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&proc_maps->len);
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}
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static bool IsOneOf(char c, char c1, char c2) {
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return c == c1 || c == c2;
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}
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bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
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char *last = proc_self_maps_.data + proc_self_maps_.len;
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if (current_ >= last) return false;
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char *next_line = (char*)internal_memchr(current_, '\n', last - current_);
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if (next_line == 0)
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next_line = last;
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// Example: 08048000-08056000 r-xp 00000000 03:0c 64593 /foo/bar
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segment->start = ParseHex(¤t_);
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CHECK_EQ(*current_++, '-');
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segment->end = ParseHex(¤t_);
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CHECK_EQ(*current_++, ' ');
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CHECK(IsOneOf(*current_, '-', 'r'));
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segment->protection = 0;
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if (*current_++ == 'r') segment->protection |= kProtectionRead;
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CHECK(IsOneOf(*current_, '-', 'w'));
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if (*current_++ == 'w') segment->protection |= kProtectionWrite;
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CHECK(IsOneOf(*current_, '-', 'x'));
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if (*current_++ == 'x') segment->protection |= kProtectionExecute;
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CHECK(IsOneOf(*current_, 's', 'p'));
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if (*current_++ == 's') segment->protection |= kProtectionShared;
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CHECK_EQ(*current_++, ' ');
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segment->offset = ParseHex(¤t_);
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CHECK_EQ(*current_++, ' ');
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ParseHex(¤t_);
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CHECK_EQ(*current_++, ':');
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ParseHex(¤t_);
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CHECK_EQ(*current_++, ' ');
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while (IsDecimal(*current_))
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current_++;
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// Qemu may lack the trailing space.
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// https://github.com/google/sanitizers/issues/160
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// CHECK_EQ(*current_++, ' ');
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// Skip spaces.
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while (current_ < next_line && *current_ == ' ')
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current_++;
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// Fill in the filename.
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if (segment->filename) {
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uptr len = Min((uptr)(next_line - current_), segment->filename_size - 1);
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internal_strncpy(segment->filename, current_, len);
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segment->filename[len] = 0;
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}
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current_ = next_line + 1;
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return true;
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}
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} // namespace __sanitizer
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#endif // SANITIZER_LINUX
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