Bug#973659: Acknowledgement (qtdeclarative5-dev-tools: qmlcachegen segfaults on hppa)
The segfault is caused by stack overflow. On hppa, the kernel config parameter CONFIG_MAX_STACK_SIZE_MB
sets the maximum stack size. This is because the main stack is allocated at the top of memory and the stack grows
up. 256 MB is not enough.
dave@mx3210:~/debian/qtgraphicaleffects-opensource-src/qtgraphicaleffects-openso
urce-src-5.15.1/src/effects/private$ gdb -c core /usr/lib/qt5/bin/qmlcachegen
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Reading symbols from /usr/lib/qt5/bin/qmlcachegen...
Reading symbols from /usr/lib/debug/.build-id/c5/9795c94efa883bf7fe6d0716815c3d08437aaf.debug...
[New LWP 17773]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/hppa-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/lib/qt5/bin/qmlcachegen -o ../../../qml/QtGraphicalEffects/private/DropSha'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000ad7e8 in QMapData<QString, QV4::Compiler::Context::Member>::findNode (
akey=..., this=<optimized out>, this=<optimized out>)
at /usr/include/hppa-linux-gnu/qt5/QtCore/qmap.h:281
281 QMapNode<Key, T> *QMapData<Key, T>::findNode(const Key &akey) const
(gdb) disass $pc-16,$pc+16
Dump of assembler code from 0xad7d8 to 0xad7f8:
0x000ad7d8 <QVector<QV4::Moth::BytecodeGenerator::I>::append(QV4::Moth::BytecodeGenerator::I const&)+316>: stw,ma r21,4(r20)
0x000ad7dc <QVector<QV4::Moth::BytecodeGenerator::I>::append(QV4::Moth::BytecodeGenerator::I const&)+320>: b,l 0xad754
<QVector<QV4::Moth::BytecodeGenerator::I>::append(QV4::Moth::BytecodeGenerator::I const&)+184>,r0
0x000ad7e0 <QVector<QV4::Moth::BytecodeGenerator::I>::append(QV4::Moth::BytecodeGenerator::I const&)+324>: ldw 0(r3),r20
0x000ad7e4 <QMapData<QString, QV4::Compiler::Context::Member>::findNode(QString const&) const+0>: stw rp,-14(sp)
=> 0x000ad7e8 <QMapData<QString, QV4::Compiler::Context::Member>::findNode(QString const&) const+4>: stw,ma r6,40(sp)
0x000ad7ec <QMapData<QString, QV4::Compiler::Context::Member>::findNode(QString const&) const+8>: ldi 0,r6
0x000ad7f0 <QMapData<QString, QV4::Compiler::Context::Member>::findNode(QString const&) const+12>: stw r5,-3c(sp)
0x000ad7f4 <QMapData<QString, QV4::Compiler::Context::Member>::findNode(QString const&) const+16>: copy r25,r5
End of assembler dump.
(gdb) bt
#0 0x000ad7e8 in QMapData<QString, QV4::Compiler::Context::Member>::findNode (
akey=..., this=<optimized out>, this=<optimized out>)
at /usr/include/hppa-linux-gnu/qt5/QtCore/qmap.h:281
#1 0x000ad970 in QMap<QString, QV4::Compiler::Context::Member>::constFind (
akey=..., this=<optimized out>)
at /usr/include/hppa-linux-gnu/qt5/QtCore/qmap.h:853
#2 QMap<QString, QV4::Compiler::Context::Member>::find (akey=...,
this=<optimized out>) at /usr/include/hppa-linux-gnu/qt5/QtCore/qmap.h:855
#3 QV4::Compiler::Context::findMember (name=..., this=<optimized out>)
at ../qml/compiler/qv4compilercontext_p.h:304
#4 QV4::Compiler::Context::resolveName (this=0xebea8, name=...,
accessLocation=...) at ../qml/compiler/qv4compilercontext.cpp:137
#5 0x000374e4 in QV4::Compiler::Codegen::referenceForName (this=0xee3674b8,
name=..., isLhs=168, accessLocation=...)
at ../qml/compiler/qv4codegen.cpp:2374
#6 0x00038320 in QV4::Compiler::Codegen::Reference::storeAccumulator (
this=0xee367494)
at ../../include/QtQml/5.15.1/QtQml/private/../../../../../src/qml/common/qqmljssourcelocation_p.h:63
#7 0x000384c8 in QV4::Compiler::Codegen::Reference::storeConsumeAccumulator (
this=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4130
#8 0x00038640 in QV4::Compiler::Codegen::Reference::doStoreOnStack (this=0x0,
slotIndex=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4186
--Type <RET> for more, q to quit, c to continue without paging--
#9 0x00038348 in QV4::Compiler::Codegen::Reference::storeOnStack (this=0x0)
at ../qml/compiler/qv4codegen.cpp:4231
#10 QV4::Compiler::Codegen::Reference::storeAccumulator (this=0xee367494)
at ../qml/compiler/qv4codegen.cpp:4231
#11 0x000384c8 in QV4::Compiler::Codegen::Reference::storeConsumeAccumulator (
this=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4130
#12 0x00038640 in QV4::Compiler::Codegen::Reference::doStoreOnStack (this=0x0,
slotIndex=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4186
#13 0x00038348 in QV4::Compiler::Codegen::Reference::storeOnStack (this=0x0)
at ../qml/compiler/qv4codegen.cpp:4231
#14 QV4::Compiler::Codegen::Reference::storeAccumulator (this=0xee367494)
at ../qml/compiler/qv4codegen.cpp:4231
#15 0x000384c8 in QV4::Compiler::Codegen::Reference::storeConsumeAccumulator (
this=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4130
#16 0x00038640 in QV4::Compiler::Codegen::Reference::doStoreOnStack (this=0x0,
slotIndex=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4186
#17 0x00038348 in QV4::Compiler::Codegen::Reference::storeOnStack (this=0x0)
at ../qml/compiler/qv4codegen.cpp:4231
#18 QV4::Compiler::Codegen::Reference::storeAccumulator (this=0xee367494)
at ../qml/compiler/qv4codegen.cpp:4231
#19 0x000384c8 in QV4::Compiler::Codegen::Reference::storeConsumeAccumulator (
this=<optimized out>) at ../qml/compiler/qv4codegen.cpp:4130
#20 0x00038640 in QV4::Compiler::Codegen::Reference::doStoreOnStack (this=0x0,
--Type <RET> for more, q to quit, c to continue without paging--q
Quit
How much stack does qmlcachegen typically need?
Another possibility is doStoreOnStack doesn't work on hppa.
Regards,
Dave Anglin
--
John David Anglin dave.anglin@bell.net
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