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[6.40][hbook] Pass the full 64 bit buffer address to HBNAM - #23968
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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)
guitargeek
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bellenot,
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pcanal
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November 3, 2026 14:04
Test Results 23 files 23 suites 3d 18h 1m 22s ⏱️ For more details on these failures, see this check. Results for commit 2edb7ca. ♻️ This comment has been updated with latest results. |
guitargeek
merged commit Nov 4, 2026
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root-project:v6-40-00-patches
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Backport of #23938 to the 6.40 branch.
(cherry picked from commit 25df3ab)