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[6.42] [hbook] Pass the full 64 bit buffer address to HBNAM - #23966
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guitargeek merged 1 commit intoNov 4, 2026
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Since 21cb0e6 (6.40.04), LOCF returns the full 64 bit word address instead of the low 32 bits. HNMADR computes the word offset of a column-wise ntuple variable as IADDW - LOCF(IQ(1)), but h2root and THbookFile still passed the buffer address to HBNAM as a 32 bit int, so IADDW lost bits 32 and 33 of the address while LOCF kept them. The stored offset was off by a multiple of 2^30 words whenever those bits were set, which is the case for most PIE placements, and HGNT2 then wrote the ntuple columns to a wild address. Pass the address as INTEGER*8 through HBNAM and compute the offset from the full addresses. THbookFile::SetBranchAddress also passed the value stored at the user pointer instead of the pointer; it now passes the address like the other call sites. Add a roottest that converts a small column-wise ntuple with h2root. The input file is written by the included mkcwn.f with CERNLIB. Fixes root-project#23628 Assisted-by: claude-code:claude-fable-5-1 (cherry picked from commit 25df3ab)
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requested review from
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as code owners
November 3, 2026 13:15
Test Results 24 files 24 suites 3d 23h 32m 57s ⏱️ For more details on these failures, see this check. Results for commit 7c48ce6. |
guitargeek
merged commit Nov 4, 2026
75cce03
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root-project:v6-42-00-patches
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Backport of #23938, requested by @guitargeek.