Kyle Ambroff-Kao fbc30e9145 support/String: Revert 6c67c7d63 to fix double-free
6c67c7d63 was attempting to fix a leak caught by a static analysis
tool, but it actually just introduced a double-free bug. Running
`UnitTester BString` will result in a crash.

The original code was correct because, in the event that realloc()
fails in BString::_Resize(), the value of fPrivateData is still
retained. It will be freed by the destructor of BString only if
fPrivateData is not shared by another BString instance, since BStrings
are copy-on-write.

Note that while the change in 6c67c7d63 caused tests to fail, that
doesn't mean those tests are ideal. They only trigger
BString::_Resize() to fail because they depend on implementation
details of hoard2 which limits allocations via malloc() to
1GB. Most malloc() implementations will allow allocations of arbitrary
sizes using anonymous mappings (mmap on Linux, or create_area() in
Haiku). This is a much bigger change, so for now I'm just adding some
comments so that we can revisit these tests if we make a change to the
allocator.

Change-Id: I208c1c7a76b6b4409d237b911c62bb3198e49dab
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2060
Reviewed-by: Stephan Aßmus <superstippi@gmx.de>
2019-12-31 11:03:59 +00:00
2019-12-21 08:48:38 +00:00
2019-12-09 19:00:20 +00:00

Haiku

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Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.

Goals

  • Sensible defaults with minimal configuration required.
  • Clean, clear, concise code.
  • Unified desktop environment.

Trying Haiku

Haiku provides pre-built nightly images and release images. Haiku is compatible with a large variety of hardware, but in case you don't want to "take the plunge" and install Haiku on bare metal, you can install it on a virtual machine (VM) instead. If you've never used a VM before, you can follow one of the "Emulating Haiku" guides.

Compiling Haiku

See ReadMe.Compiling.

Contributing

Haiku is a meritocratic open source project with a large variety of tasks. Even if you can't write code, you can still help! Haiku needs designers, (technical) writers, translators, testers... Get involved and help out!

Contributing code

If you're submitting a patch to us, please make sure you're following the patch submitting guidelines.

If you're having trouble finding something in the source tree, you can use one of our web-based source code browsers:

Contributing documentation

The main piece of documentation that still needs work are the API docs (found in the tree at docs/user). Just find an undocumented class, write documentation for it, and submit a patch.

Contributing translations

See wiki:i18n.

Contributing software ports

See HaikuPorts.

Contributing to our infrastructure

See Infrastructure.

Description
The Haiku operating system
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