mirror of
https://github.com/JakeHillion/object-introspection.git
synced 2024-11-12 21:56:54 +00:00
Object Introspection (OI) enables on-demand, hierarchical profiling of objects in arbitrary C/C++ programs with no recompilation.
89b230395f
Summary: tbv2: remove unnecessary copy in Element `IntrospectionResult::const_iterator` iterates through the `Element`s in an `IntrospectionResult`. `Element` currently copies the `type_path` which is a `std::vector<string_view>` every time the iterator is incremented. This is unnecessary as the data in the vector only changes slightly between iterations. This change changes the `type_path` field in `Element` to a `std::span<const std::string_view>`. Doing this previously caused SEGVs because of the iterator's potential to be copied. To make it possible we do two things: 1. Make all copies explicit using a clone interface as in `ContainerInfo`. This prevents accidental copies of an expensive structure. 2. After calling the copy constructor in `clone()` update the `span` in `next_` to point at the newly copied structure. Moves are fine because the `span` points at the allocation of the `vector`, not the vector itself. Test Plan: - CI - `FILTER='OilIntegration.*' make test` - Ran `OilgenIntegration.std_vector_vector_int_some` which SEGVd with the `span` change before and now doesn't. This now passes cleanly with ASAN enabled on the target, though isn't available in `main` (only works on my machine). Differential Revision: D53472595 Pulled By: JakeHillion |
||
|---|---|---|
| .circleci | ||
| .github | ||
| cmake | ||
| examples | ||
| extern | ||
| include/oi | ||
| oi | ||
| resources | ||
| test | ||
| tools | ||
| types | ||
| website | ||
| .clang-format | ||
| .clang-tidy | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitignore | ||
| .gitmodules | ||
| CHANGELOG.md | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| dev.oid.toml | ||
| flake.lock | ||
| flake.nix | ||
| LICENSE | ||
| oss.oid.toml | ||
| README.md | ||
object-introspection
Object Introspection is a memory profiling technology for C++ objects. It provides the ability to dynamically instrument applications to capture the precise memory occupancy of entire object hierarchies including all containers and dynamic allocations. All this with no code modification or recompilation!
For more information on the technology and how to get started applying it to your applications please check out the Object Introspection website.
Join the Object Introspection community
See the CONTRIBUTING file for how to help out.
License
Object Introspection is licensed under the Apache 2.0 License.