Drop log category in SeedStartup #29480

1. 
   hebasto commented at 2:42 pm on February 26, 2024: member

   This LogPrint(BCLog::RAND, ...) is never logged because the SeedStartup function is called at a very early stage, such as during the instantiation of the static CSignatureCache object, before any log categories are added. This PR fixes this behavior.
2. Drop log category in `SeedStartup`

   This `LogPrint(BCLog::RAND, ...)` is never logged because the
   `SeedStartup` function is called at a very early stage, such as during
   the instantiation of the static `CSignatureCache` object, before any log
   categories are added. This change addresses this behavior.

   88468a8afc
3. 
   DrahtBot commented at 2:42 pm on February 26, 2024: contributor

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   Type	Reviewers
   ACK	hernanmarino, maflcko

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   Conflicts

   Reviewers, this pull request conflicts with the following ones:

   • #29641 (scripted-diff: Use LogInfo/LogDebug over LogPrintf/LogPrint by maflcko)

   If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

4. luke-jr referenced this in commit 2a48bf5274 on Mar 5, 2024
5. 
   hernanmarino commented at 10:50 pm on April 12, 2024: contributor

   ACK 88468a8afcd908cd26f4e6ecfb86c80d1c56fe73
6. 
   maflcko commented at 7:25 am on August 8, 2024: member

   This LogPrint(BCLog::RAND, ...) is never logged because the SeedStartup function is called at a very early stage, such as during the instantiation of the static CSignatureCache object, before any log categories are added. This PR fixes this behavior.

   This is outdated and the steps to reproduce no longer work. Currently, it needs something like:

    0diff --git a/src/init.cpp b/src/init.cpp
    1index faaf3353d0..164f624b4e 100644
    2--- a/src/init.cpp
    3+++ b/src/init.cpp
    4@@ -194,6 +194,11 @@ static void RemovePidFile(const ArgsManager& args)
    5         LogPrintf("Unable to remove PID file (%s): %s\n", fs::PathToString(pid_path), msg);
    6     }
    7 }
    8+static bool once_flag{[] {
    9+    auto v{std::vector<uint8_t>(3)};
   10+    GetStrongRandBytes(v);
   11+    return true;
   12+}()};
   13 
   14 static std::optional<util::SignalInterrupt> g_shutdown;
   15 
   

   and: ./bld/src/qt/bitcoin-qt -datadir=/tmp -regtest -asmap=/tmp/no_file -printtoconsole -debug=rand -logthreadnames=1 -logsourcelocations=1 (or similar).

7. 
   maflcko commented at 7:38 am on August 8, 2024: member

   review ACK 88468a8afcd908cd26f4e6ecfb86c80d1c56fe73

   but it would be good to update the context here, given my previous reply.

   Also, it may be good to use LogDebug in the only remaining RAND-debug-log call:

   0$ git grep '::RAND'
   1src/logging.cpp:    {"rand", BCLog::RAND},
   2src/random.cpp:    LogPrint(BCLog::RAND, "Feeding %i bytes of dynamic environment data into RNG\n", hasher.Size() - old_size);
   

   This also clarifies that the this is the only remaining call, which seems like useful context for reviewers.

8. 
   hebasto commented at 4:07 pm on August 12, 2024: member

   I won’t be working on this PR in the near future. So, closing it and labeling it “Up for grabs”.
9. hebasto closed this on Aug 12, 2024

   ---

10. hebasto added the label Up for grabs on Aug 12, 2024
11. 
    danielabrozzoni commented at 3:17 pm on May 22, 2025: contributor

    Hey! I found this PR while looking at the up for grabs, but I noticed that #30750 replaced LogPrint with LogDebug, and currently on master the log line is printed. As far as I understand, this PR shouldn’t be needed anymore, and the “Up for grabs” label can be removed :)

    0❯ ./build/bin/bitcoind -debug=rand
    12025-05-22T15:16:52Z [rand] Feeding 133269 bytes of environment data into RNG
    

12. hebasto removed the label Up for grabs on May 22, 2025

Contributors
hebasto DrahtBot hernanmarino maflcko danielabrozzoni