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1a0b5f33b3
cmake/target.cmake defines macros for the supported platforms, this commit changes predefined system macros to our own macros. __linux__ --> OS_LINUX __APPLE__ --> OS_DARWIN __FreeBSD__ --> OS_FREEBSD
85 lines
1.4 KiB
C++
85 lines
1.4 KiB
C++
#include "getMappedArea.h"
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#include <Common/Exception.h>
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#if defined(OS_LINUX)
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/hex.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/ReadHelpers.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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}
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namespace
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{
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uintptr_t readAddressHex(DB::ReadBuffer & in)
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{
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uintptr_t res = 0;
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while (!in.eof())
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{
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if (isHexDigit(*in.position()))
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{
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res *= 16;
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res += unhex(*in.position());
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++in.position();
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}
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else
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break;
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}
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return res;
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}
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}
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std::pair<void *, size_t> getMappedArea(void * ptr)
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{
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using namespace DB;
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uintptr_t uintptr = reinterpret_cast<uintptr_t>(ptr);
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ReadBufferFromFile in("/proc/self/maps");
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while (!in.eof())
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{
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uintptr_t begin = readAddressHex(in);
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assertChar('-', in);
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uintptr_t end = readAddressHex(in);
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skipToNextLineOrEOF(in);
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if (begin <= uintptr && uintptr < end)
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return {reinterpret_cast<void *>(begin), end - begin};
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}
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throw Exception("Cannot find mapped area for pointer", ErrorCodes::LOGICAL_ERROR);
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}
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}
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#else
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NOT_IMPLEMENTED;
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}
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std::pair<void *, size_t> getMappedArea(void *)
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{
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throw Exception("The function getMappedArea is implemented only for Linux", ErrorCodes::NOT_IMPLEMENTED);
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}
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}
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#endif
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