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llvm-project/llvm/test/DebugInfo/PDB/write-fpm.test

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[pdb/lld] Write a valid FPM. The PDB reserves certain blocks for the FPM that describe which blocks in the file are allocated and which are free. We weren't filling that out at all, and in some cases we were even stomping it with incorrect data. This patch writes a correct FPM. Differential Revision: https://reviews.llvm.org/D36235 llvm-svn: 309896
2017-08-03 06:31:39 +08:00
; RUN: llvm-pdbutil yaml2pdb -pdb=%t.pdb %p/Inputs/one-symbol.yaml
; RUN: llvm-pdbutil bytes -fpm %t.pdb | FileCheck %s
CHECK: Free Page Map
CHECK-NEXT: ============================================================
[MSF] Default to FPM2, and always mark FPM pages allocated. There are two FPMs in an MSF file, the idea being that for incremental updates you can write to the alternate one and then atomically swap them on commit. LLVM defaulted to using FPM1 on the first commit, but this differs from Microsoft's behavior which is to default to using FPM2 on the first commit. To eliminate some byte-level file differences, this patch changes LLVM's default to also be FPM2. Additionally, LLVM was trying to be "smart" about marking FPM pages allocated. In addition to marking every page belonging to the alternate FPM as unallocated, LLVM also marked pages at the end of the main FPM which were not needed as unallocated. In order to match the behavior of Microsoft-generated PDBs, we now always mark every FPM block as allocated, regardless of whether it is in the main FPM or the alt FPM, and regardless of whether or not it describes blocks which are actually in the file. This has the side benefit of simplifying our code. llvm-svn: 328812
2018-03-30 02:34:15 +08:00
CHECK-NEXT: Block 2 (
CHECK-NEXT: 2000: 00F8FFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF |................................|
CHECK-NEXT: 2020: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF |................................|
CHECK: 2FE0: FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF |................................|
[pdb/lld] Write a valid FPM. The PDB reserves certain blocks for the FPM that describe which blocks in the file are allocated and which are free. We weren't filling that out at all, and in some cases we were even stomping it with incorrect data. This patch writes a correct FPM. Differential Revision: https://reviews.llvm.org/D36235 llvm-svn: 309896
2017-08-03 06:31:39 +08:00
CHECK: )