d78040aadb
...as reported during CppunitTest_extensions_test_update (see below). I don't see a reason why those pContext should be shared_ptr, so better make them unique_ptr to guarantee that xmlFreeParserCtxt is called with c still in scope (in CDocumentBuilder::parse). > ==10883==ERROR: AddressSanitizer: stack-use-after-scope on address 0x2b111da94b68 at pc 0x2b116e55a200 bp 0x7fff7228b0f0 sp 0x7fff7228b0e8 > READ of size 8 at 0x2b111da94b68 thread T0 > #0 0x2b116e55a1ff in com::sun:⭐:uno::BaseReference::is() const include/com/sun/star/uno/Reference.h:94:27 > #1 0x2b116e699756 in DOM::xmlIO_close_func(void*) unoxml/source/dom/documentbuilder.cxx:214:33 > #2 0x2b11300cf646 in xmlFreeParserInputBuffer__internal_alias workdir/UnpackedTarball/xml2/xmlIO.c:2575:2 > #3 0x2b112fdd2706 in xmlFreeInputStream__internal_alias workdir/UnpackedTarball/xml2/parserInternals.c:1341:9 > #4 0x2b112fddebf3 in xmlFreeParserCtxt__internal_alias workdir/UnpackedTarball/xml2/parserInternals.c:1774:9 > #5 0x2b116e6aaddc in std::_Sp_counted_deleter<_xmlParserCtxt*, void (*)(_xmlParserCtxt*), std::allocator<void>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() /usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/shared_ptr_base.h:464:9 > #6 0x2b116e65370a in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() /usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/shared_ptr_base.h:150:6 > #7 0x2b116e653494 in std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count() /usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/shared_ptr_base.h:662:11 > #8 0x2b116e6a78b1 in std::__shared_ptr<_xmlParserCtxt, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr() /usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/shared_ptr_base.h:928:31 > #9 0x2b116e69f01d in std::shared_ptr<_xmlParserCtxt>::~shared_ptr() /usr/lib/gcc/x86_64-redhat-linux/6.3.1/../../../../include/c++/6.3.1/bits/shared_ptr.h:93:11 > #10 0x2b116e696aca in DOM::CDocumentBuilder::parse(com::sun:⭐:uno::Reference<com::sun:⭐:io::XInputStream> const&) unoxml/source/dom/documentbuilder.cxx:336:5 > #11 0x2b116e699fe2 in non-virtual thunk to DOM::CDocumentBuilder::parse(com::sun:⭐:uno::Reference<com::sun:⭐:io::XInputStream> const&) unoxml/source/dom/documentbuilder.cxx > #12 0x2b116df6449a in (anonymous namespace)::UpdateInformationProvider::getUpdateInformationEnumeration(com::sun:⭐:uno::Sequence<rtl::OUString> const&, rtl::OUString const&) extensions/source/update/feed/updatefeed.cxx:589:83 > #13 0x2b116df682ea in non-virtual thunk to (anonymous namespace)::UpdateInformationProvider::getUpdateInformationEnumeration(com::sun:⭐:uno::Sequence<rtl::OUString> const&, rtl::OUString const&) extensions/source/update/feed/updatefeed.cxx > #14 0x2b115d9a73eb in testupdate::Test::testGetUpdateInformationEnumeration() extensions/qa/update/test_update.cxx:57:26 > #15 0x2b115d9baf1b in CppUnit::TestCaller<testupdate::Test>::runTest() workdir/UnpackedTarball/cppunit/include/cppunit/TestCaller.h:166:6 > #16 0x2b111904ad8b in CppUnit::TestCaseMethodFunctor::operator()() const workdir/UnpackedTarball/cppunit/src/cppunit/TestCase.cpp:32:5 > #17 0x2b11322dab0f in (anonymous namespace)::Protector::protect(CppUnit::Functor const&, CppUnit::ProtectorContext const&) test/source/vclbootstrapprotector.cxx:39:14 > #18 0x2b11190093ce in CppUnit::ProtectorChain::ProtectFunctor::operator()() const workdir/UnpackedTarball/cppunit/src/cppunit/ProtectorChain.cpp:20:25 > #19 0x2b1128c6214f in (anonymous namespace)::Prot::protect(CppUnit::Functor const&, CppUnit::ProtectorContext const&) unotest/source/cpp/unobootstrapprotector/unobootstrapprotector.cxx:89:12 > #20 0x2b11190093ce in CppUnit::ProtectorChain::ProtectFunctor::operator()() const workdir/UnpackedTarball/cppunit/src/cppunit/ProtectorChain.cpp:20:25 > #21 0x2b1124efc351 in (anonymous namespace)::Prot::protect(CppUnit::Functor const&, CppUnit::ProtectorContext const&) unotest/source/cpp/unoexceptionprotector/unoexceptionprotector.cxx:63:16 > #22 0x2b11190093ce in CppUnit::ProtectorChain::ProtectFunctor::operator()() const workdir/UnpackedTarball/cppunit/src/cppunit/ProtectorChain.cpp:20:25 > #23 0x2b1118f87350 in CppUnit::DefaultProtector::protect(CppUnit::Functor const&, CppUnit::ProtectorContext const&) workdir/UnpackedTarball/cppunit/src/cppunit/DefaultProtector.cpp:15:12 > #24 0x2b11190093ce in CppUnit::ProtectorChain::ProtectFunctor::operator()() const workdir/UnpackedTarball/cppunit/src/cppunit/ProtectorChain.cpp:20:25 > #25 0x2b1119005e70 in CppUnit::ProtectorChain::protect(CppUnit::Functor const&, CppUnit::ProtectorContext const&) workdir/UnpackedTarball/cppunit/src/cppunit/ProtectorChain.cpp:77:18 > #26 0x2b11190c50f5 in CppUnit::TestResult::protect(CppUnit::Functor const&, CppUnit::Test*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) workdir/UnpackedTarball/cppunit/src/cppunit/TestResult.cpp:181:28 > #27 0x2b1119048fa4 in CppUnit::TestCase::run(CppUnit::TestResult*) workdir/UnpackedTarball/cppunit/src/cppunit/TestCase.cpp:91:13 > #28 0x2b111904d7a7 in CppUnit::TestComposite::doRunChildTests(CppUnit::TestResult*) workdir/UnpackedTarball/cppunit/src/cppunit/TestComposite.cpp:64:30 > #29 0x2b111904c819 in CppUnit::TestComposite::run(CppUnit::TestResult*) workdir/UnpackedTarball/cppunit/src/cppunit/TestComposite.cpp:23:3 > #30 0x2b111904d7a7 in CppUnit::TestComposite::doRunChildTests(CppUnit::TestResult*) workdir/UnpackedTarball/cppunit/src/cppunit/TestComposite.cpp:64:30 > #31 0x2b111904c819 in CppUnit::TestComposite::run(CppUnit::TestResult*) workdir/UnpackedTarball/cppunit/src/cppunit/TestComposite.cpp:23:3 > #32 0x2b11191035c9 in CppUnit::TestRunner::WrappingSuite::run(CppUnit::TestResult*) workdir/UnpackedTarball/cppunit/src/cppunit/TestRunner.cpp:47:27 > #33 0x2b11190c340d in CppUnit::TestResult::runTest(CppUnit::Test*) workdir/UnpackedTarball/cppunit/src/cppunit/TestResult.cpp:148:9 > #34 0x2b111910489b in CppUnit::TestRunner::run(CppUnit::TestResult&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) workdir/UnpackedTarball/cppunit/src/cppunit/TestRunner.cpp:96:14 > #35 0x532fb4 in (anonymous namespace)::ProtectedFixtureFunctor::run() const sal/cppunittester/cppunittester.cxx:306:20 > #36 0x52e7c3 in sal_main() sal/cppunittester/cppunittester.cxx:456:20 > #37 0x52cb6f in main sal/cppunittester/cppunittester.cxx:363:1 > #38 0x2b111acb5400 in __libc_start_main (/lib64/libc.so.6+0x20400) > #39 0x438019 in _start (workdir/LinkTarget/Executable/cppunittester+0x438019) > > Address 0x2b111da94b68 is located in stack of thread T0 at offset 104 in frame > #0 0x2b116e69553f in DOM::CDocumentBuilder::parse(com::sun:⭐:uno::Reference<com::sun:⭐:io::XInputStream> const&) unoxml/source/dom/documentbuilder.cxx:303 > > This frame has 4 object(s): > [32, 40) 'g' (line 308) > [64, 80) 'pContext' (line 310) > [96, 120) 'c' (line 321) <== Memory access at offset 104 is inside this variable > [160, 168) 'ref.tmp' (line 333) Change-Id: I3398d54776af4927417e392e55bbca740d4121af
LibreOffice
LibreOffice is an integrated office suite based on copyleft licenses and compatible with most document formats and standards. Libreoffice is backed by The Document Foundation, which represents a large independent community of enterprises, developers and other volunteers moved by the common goal of bringing to the market the best software for personal productivity. LibreOffice is open source, and free to download, use and distribute.
A quick overview of the LibreOffice code structure.
Overview
You can develop for LibreOffice in one of two ways, one recommended and one much less so. First the somewhat less recommended way: it is possible to use the SDK to develop an extension, for which you can read the API docs here and here. This re-uses the (extremely generic) UNO APIs that are also used by macro scripting in StarBasic.
The best way to add a generally useful feature to LibreOffice is to work on the code base however. Overall this way makes it easier to compile and build your code, it avoids any arbitrary limitations of our scripting APIs, and in general is far more simple and intuitive - if you are a reasonably able C++ programmer.
The important bits of code
Each module should have a README file inside it which has some
degree of documentation for that module; patches are most welcome to
improve those. We have those turned into a web page here:
However, there are two hundred modules, many of them of only peripheral interest for a specialist audience. So - where is the good stuff, the code that is most useful. Here is a quick overview of the most important ones:
| Module | Description |
|---|---|
| sal/ | this provides a simple System Abstraction Layer |
| tools/ | this provides basic internal types: 'Rectangle', 'Color' etc. |
| vcl/ | this is the widget toolkit library and one rendering abstraction |
| framework | UNO framework, responsible for building toolbars, menus, status bars, and the chrome around the document using widgets from VCL, and XML descriptions from /uiconfig/ files |
| sfx2/ | legacy core framework used by Writer/Calc/Draw: document model / load/save / signals for actions etc. |
| svx/ | drawing model related helper code, including much of Draw/Impress |
Then applications
| Module | Description |
|---|---|
| desktop/ | this is where the 'main' for the application lives, init / bootstrap. the name dates back to an ancient StarOffice that also drew a desktop |
| sw/ | Writer |
| sc/ | Calc |
| sd/ | Draw / Impress |
There are several other libraries that are helpful from a graphical perspective:
| Module | Description |
|---|---|
| basegfx/ | algorithms and data-types for graphics as used in the canvas |
| canvas/ | new (UNO) canvas rendering model with various backends |
| cppcanvas/ | C++ helper classes for using the UNO canvas |
| drawinglayer/ | View code to render drawable objects and break them down into primitives we can render more easily. |
Finding out more
Beyond this, you can read the README files, send us patches, ask
on the mailing list libreoffice@lists.freedesktop.org (no subscription
required) or poke people on IRC #libreoffice-dev on irc.freenode.net -
we're a friendly and generally helpful mob. We know the code can be
hard to get into at first, and so there are no silly questions.