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d3e40af259
`BaseIndex` currently uses the same name for logs, `getindexinfo`, prune locks, and the sync thread. Linux truncates system thread names to 15 visible bytes after the `b-` prefix, so long indexer names are clipped in system tools. Pass a separate thread name explicitly at each `BaseIndex` call site and shorten the OS-visible indexer names to `txidx`, `blkfltbscidx`, `coinstatsidx`, and `txospenderidx`. Add an `Assume` to `ThreadRename()` so future OS-visible thread names keep fitting the same Linux limit. The public index names, `getindexinfo` keys, command-line options, and on-disk paths stay unchanged. Co-authored-by: winterrdog <winterrdog@users.noreply.github.com> Co-authored-by: Hodlinator <172445034+hodlinator@users.noreply.github.com> Co-authored-by: sedited <seb.kung@gmail.com> Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Copyright (c) 2018-present The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <util/threadnames.h>
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#include <util/check.h>
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#include <algorithm>
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#include <cstring>
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#include <string>
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#if (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
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#include <pthread.h>
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#include <pthread_np.h>
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#endif
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#if __has_include(<sys/prctl.h>)
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#include <sys/prctl.h>
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#endif
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//! Set the thread's name at the process level. Does not affect the
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//! internal name.
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static void SetThreadName(const char* name)
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{
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#if defined(PR_SET_NAME)
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// Only the first 15 characters are used (16 - NUL terminator)
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::prctl(PR_SET_NAME, name, 0, 0, 0);
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#elif (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
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pthread_set_name_np(pthread_self(), name);
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#elif defined(__APPLE__)
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pthread_setname_np(name);
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#else
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// Prevent warnings for unused parameters...
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(void)name;
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#endif
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}
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/**
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* The name of the thread. We use char array instead of std::string to avoid
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* complications with running a destructor when the thread exits. Avoid adding
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* other thread_local variables.
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* @see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278701
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*/
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static thread_local char g_thread_name[128]{'\0'};
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std::string util::ThreadGetInternalName() { return g_thread_name; }
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//! Set the in-memory internal name for this thread. Does not affect the process
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//! name.
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static void SetInternalName(const std::string& name)
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{
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const size_t copy_bytes{std::min(sizeof(g_thread_name) - 1, name.length())};
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std::memcpy(g_thread_name, name.data(), copy_bytes);
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g_thread_name[copy_bytes] = '\0';
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}
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void util::ThreadRename(const std::string& name)
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{
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Assume(name.size() <= 13); // Linux keeps 15 bytes
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SetThreadName(("b-" + name).c_str());
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SetInternalName(name);
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}
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void util::ThreadSetInternalName(const std::string& name)
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{
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SetInternalName(name);
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}
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