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Introduce possible PrecisionCascade versions of (un)zip functions #12

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@genevb genevb commented Jun 16, 2022

This is a draft of something that would work with pull request #11. It may be best not to merge this until other things are more settled, but it's here if we want to consider it.

@genevb genevb requested a review from pcanal as a code owner June 16, 2022 21:10
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genevb commented Jun 17, 2022

Superseded by PR #13 .

@genevb genevb closed this Jun 17, 2022
pcanal pushed a commit that referenced this pull request Jun 17, 2022
Most commonly seen on ppc64le. Backtrace:

===========================================================
The lines below might hint at the cause of the crash.
You may get help by asking at the ROOT forum https://root.cern/forum
Only if you are really convinced it is a bug in ROOT then please submit a
report at https://root.cern/bugs Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
 #11 ROOT::Experimental::RColor::toHex[abi:cxx11](unsigned char) (v=<optimized out>) at /usr/include/c++/11/ext/new_allocator.h:82
 #12 0x00007fff90c220ec in ROOT::Experimental::RColor::SetRGB (this=0x7fffeadf5d10, r=<optimized out>, g=<optimized out>, b=<optimized out>) at /usr/include/c++/11/ext/new_allocator.h:89
@genevb genevb deleted the AccelogicZIP branch September 2, 2022 20:58
pcanal pushed a commit that referenced this pull request Aug 7, 2024
   6/1344 Test   #12: pyunittests-pyroot-import-load-libs .......................................***Failed    1.35 sec
test_import (import_load_libs.ImportLoadLibs.test_import)
Test libraries loaded after importing ROOT ... ERROR
======================================================================
ERROR: test_import (import_load_libs.ImportLoadLibs.test_import)
Test libraries loaded after importing ROOT
----------------------------------------------------------------------
Exception: Found not whitelisted libraries after importing ROOT:
 - libtbbmalloc
If the test fails with a library that is loaded on purpose, please add it to the whitelist.
----------------------------------------------------------------------
Ran 1 test in 1.186s
FAILED (errors=1)

This failure is seen in Fedora 41 after tbb was updated from version
2021.11.0 to version 2021.13.0 in  the distribution.
pcanal pushed a commit that referenced this pull request Sep 26, 2024
The test was dynamically allocating the array data members of the `Data` struct, but never deallocating them. This commit polishes the `Data` struct definition and ensures proper management of the data members.

The previous way of writing data to the TTree was leading to a bad memory access in the ReadBasicPointer inlined function in TStreamerInfoReadBuffer.cxx while reading the `double*` array. In particular, the issue arises when accessing and then deallocating the array at the current index provided by the `TCompInfo` object.

```
Target 0: (repro.out) stopped.
(lldb)
Process 13498 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = step in
    frame #0: 0x00000001044cf140 libRIO.so`int TStreamerInfo::ReadBuffer<char**>(this=<unavailable>, b=<unavailable>, arr=<unavailable>, compinfo=<unavailable>, first=<unavailable>, last=<unavailable>, narr=<unavailable>, eoffset=<unavailable>, arrayMode=0) at TStreamerInfoReadBuffer.cxx:923:65 [opt]
   920 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kLong:   ReadBasicPointer(Long_t);  continue;
   921 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kLong64: ReadBasicPointer(Long64_t);  continue;
   922 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kFloat:  ReadBasicPointer(Float_t);  continue;
-> 923 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kDouble: ReadBasicPointer(Double_t);  continue;
   924 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kUChar:  ReadBasicPointer(UChar_t);  continue;
   925 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kUShort: ReadBasicPointer(UShort_t);  continue;
   926 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kUInt:   ReadBasicPointer(UInt_t);  continue;
Target 0: (repro.out) stopped.
(lldb)
Process 13498 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = step in
    frame #0: 0x00000001044cf184 libRIO.so`int TStreamerInfo::ReadBuffer<char**>(TBuffer&, char** const&, TStreamerInfo::TCompInfo* const*, int, int, int, int, int) [inlined] TBuffer::BufferSize(this=0x000060e00010ef00) const at TBuffer.h:98:41 [opt]
   95  	   TObject *GetParent()  const;
   96  	   char    *Buffer()     const { return fBuffer; }
   97  	   char    *GetCurrent() const { return fBufCur; }
-> 98  	   Int_t    BufferSize() const { return fBufSize; }
   99  	   void     DetachBuffer() { fBuffer = nullptr; }
   100 	   Int_t    Length()     const { return (Int_t)(fBufCur - fBuffer); }
   101 	   void     Expand(Int_t newsize, Bool_t copy = kTRUE);  // expand buffer to newsize
Target 0: (repro.out) stopped.
(lldb) p fBufSize
(Int_t) 32008
(lldb) s
Process 13498 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = step in
    frame #0: 0x00000001044cf194 libRIO.so`int TStreamerInfo::ReadBuffer<char**>(this=<unavailable>, b=<unavailable>, arr=<unavailable>, compinfo=<unavailable>, first=<unavailable>, last=<unavailable>, narr=<unavailable>, eoffset=<unavailable>, arrayMode=0) at TStreamerInfoReadBuffer.cxx:923:65 [opt]
   920 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kLong:   ReadBasicPointer(Long_t);  continue;
   921 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kLong64: ReadBasicPointer(Long64_t);  continue;
   922 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kFloat:  ReadBasicPointer(Float_t);  continue;
-> 923 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kDouble: ReadBasicPointer(Double_t);  continue;
   924 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kUChar:  ReadBasicPointer(UChar_t);  continue;
   925 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kUShort: ReadBasicPointer(UShort_t);  continue;
   926 	         case TStreamerInfo::kOffsetP + TStreamerInfo::kUInt:   ReadBasicPointer(UInt_t);  continue;
Target 0: (repro.out) stopped.
(lldb) s
Process 13498 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0xbebebebebebebeae)
    frame #0: 0x0000000107bac674 libclang_rt.asan_osx_dynamic.dylib`__asan::Allocator::Deallocate(void*, unsigned long, unsigned long, __sanitizer::BufferedStackTrace*, __asan::AllocType) + 76
libclang_rt.asan_osx_dynamic.dylib`__asan::Allocator::Deallocate:
->  0x107bac674 <+76>: casalb w8, w9, [x22]
    0x107bac678 <+80>: cmp    w8, #0x2
    0x107bac67c <+84>: b.ne   0x107bac6f4    ; <+204>
    0x107bac680 <+88>: mov    x8, #-0x100000000 ; =-4294967296
Target 0: (repro.out) stopped.
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0xbebebebebebebeae)
  * frame #0: 0x0000000107bac674 libclang_rt.asan_osx_dynamic.dylib`__asan::Allocator::Deallocate(void*, unsigned long, unsigned long, __sanitizer::BufferedStackTrace*, __asan::AllocType) + 76
    frame #1: 0x0000000107c0c444 libclang_rt.asan_osx_dynamic.dylib`wrap__ZdaPv + 232
    frame #2: 0x00000001044d4a60 libRIO.so`int TStreamerInfo::ReadBuffer<char**>(this=<unavailable>, b=<unavailable>, arr=<unavailable>, compinfo=<unavailable>, first=<unavailable>, last=<unavailable>, narr=<unavailable>, eoffset=<unavailable>, arrayMode=0) at TStreamerInfoReadBuffer.cxx:923:65 [opt]
    frame #3: 0x0000000103ffc888 libRIO.so`TStreamerInfoActions::GenericReadAction(buf=0x000060e00010ef00, addr=0x0000602000056bd0, config=0x0000604000149910) at TStreamerInfoActions.cxx:195:45
    frame #4: 0x0000000103caa5ec libRIO.so`TStreamerInfoActions::TConfiguredAction::operator()(this=0x00006030001693f0, buffer=0x000060e00010ef00, object=0x0000602000056bd0) const at TStreamerInfoActions.h:123:17
    frame #5: 0x0000000103ca9ef8 libRIO.so`TBufferFile::ApplySequence(this=0x000060e00010ef00, sequence=0x000060600011ac20, obj=0x0000602000056bd0) at TBufferFile.cxx:3702:10
    frame #6: 0x00000001064bc570 libTree.so`TBranchElement::ReadLeavesMemberBranchCount(this=0x0000619000566380, b=0x000060e00010ef00) at TBranchElement.cxx:4603:6
    frame #7: 0x0000000106455ce4 libTree.so`TBranch::GetEntry(this=0x0000619000566380, entry=0, getall=0) at TBranch.cxx:1753:4
    frame #8: 0x00000001064a1764 libTree.so`TBranchElement::GetEntry(this=0x0000619000566380, entry=0, getall=0) at TBranchElement.cxx:2783:27
    frame #9: 0x000000010739915c libTreePlayer.so`ROOT::Detail::TBranchProxy::Read(this=0x00006110000c9580) at TBranchProxy.h:163:42
    frame #10: 0x0000000107649ba8 libTreePlayer.so`(anonymous namespace)::TObjectArrayReader::At(this=0x0000603000169900, proxy=0x00006110000c9580, idx=1) at TTreeReaderArray.cxx:176:22
    frame #11: 0x000000010000c2e4 repro.out`ROOT::Internal::TTreeReaderArrayBase::UntypedAt(this=0x000000016fdfe740, idx=1) const at TTreeReaderArray.h:41:62
    frame #12: 0x000000010000c200 repro.out`TTreeReaderArray<double>::At(this=0x000000016fdfe740, idx=1) at TTreeReaderArray.h:205:54
    frame #13: 0x00000001000065e0 repro.out`TTreeReaderArray<double>::operator[](this=0x000000016fdfe740, idx=1) at TTreeReaderArray.h:207:44
    frame #14: 0x0000000100007b48 repro.out`simpleTest() at repro.cpp:123:26
    frame #15: 0x0000000100007e10 repro.out`main at repro.cpp:128:5
    frame #16: 0x000000018c718274 dyld`start + 2840
```
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