Add Emacs Configuration for C++ #11
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The guidelines were written by Aeva in <Aeva#9 (comment)>. Co-Authored-By: Aeva Palecek <aeva.ntsc@gmail.com>
The values in `c-file-offsets` were generated by running `c-guess-no-install` on `gl_boilerplate.cpp`, `tangerine.cpp`, and `sdf_rendering.cpp`.
Aeva
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May 12, 2023
Remarkably this change seems to prevent this use-after-free error:
==4284==ERROR: AddressSanitizer: heap-use-after-free on address 0x60700003cf50 at pc 0x7f22b904814b bp 0x7ffda5338480 sp 0x7ffda5337c30
READ of size 79 at 0x60700003cf50 thread T0
#0 0x7f22b904814a in __interceptor_memcpy ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:827
#1 0x560430138ab6 in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char*>(char*, char*, std::forward_iterator_tag) [clone .constprop.0] (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2f0ab6)
#2 0x5604301421c6 in ifd::FileDialog::m_setDirectory(std::filesystem::__cxx11::path const&, bool) (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2fa1c6)
#3 0x5604301456aa in ifd::FileDialog::m_renderContent() (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2fd6aa)
#4 0x560430145e6b in ifd::FileDialog::m_renderFileDialog() (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2fde6b)
#5 0x5604301464f7 in ifd::FileDialog::IsDone(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2fe4f7)
#6 0x5604300678b4 in RenderUI(SDL_Window*, bool&) (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x21f8b4)
#7 0x56043006fa0e in MainLoop() (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x227a0e)
#8 0x56042fe898fa in main (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x418fa)
#9 0x7f22b8967189 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
#10 0x7f22b8967244 in __libc_start_main_impl ../csu/libc-start.c:381
#11 0x56042fe8b8c0 in _start (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x438c0)
0x60700003cf50 is located 0 bytes inside of 80-byte region [0x60700003cf50,0x60700003cfa0)
freed by thread T0 here:
#0 0x7f22b90ba3c8 in operator delete(void*, unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:164
#1 0x56043014210a in ifd::FileDialog::m_setDirectory(std::filesystem::__cxx11::path const&, bool) (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2fa10a)
previously allocated by thread T0 here:
#0 0x7f22b90b94c8 in operator new(unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:95
#1 0x560430138a9b in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char*>(char*, char*, std::forward_iterator_tag) [clone .constprop.0] (/home/aeva/Projects/tangerine/linux/build/Release/bin/tangerine+0x2f0a9b)
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Spun off from #9.
Differences from #9 (comment):
c-file-offsetsis the file-local version ofc-offsets-alist.member-init-contchanged to-from-2once I got the tab settings right.tangerine.cppandsdf_rendering.cpp(in addition togl_boilerplate.cpp) produced some additional entries:On the other hand, it's encouraging to me that, when an override has been inferred, it has always been inferred with the same value. That suggests to me that the configuration is correct, just possibly not complete.
Ideally someone who understands these nuances more deeply than I do would look this over. I'm not marking this PR as a "draft" because there isn't a clear-cut showstopper, but I plan to continue trying this out.