microsoft / microsoft/snmalloc
malloc_history equivalent
Nobody has claimed this yet.
- Dominant language
- C++
- Stars
- 2k
- Forks
- 138
- Avg merge
- 11h 19m
- Merged PRs (30d)
- 5
Description
The Darwin malloc implementation has a feature (enabled by an environment variable) that records, for each allocation or deallocation event:
- The size of the allocation.
- The address of the allocation.
- The thread ID for the [de]allocation call.
- A stack trace at the [de]allocation site.
This makes it possible for after a crash to determine where an allocation originated and where it was freed.
Implementing similar functionality in snmalloc (ideally using ifunc logic to replace the malloc / free functions at load time) could reuse some of the compressed stack trace logic from the LLVM sanitisers.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No files, tests, or entry points are identified. Start by reading snmalloc's allocator and the compressed stack-trace logic in the LLVM sanitizers, then investigate how malloc/free could be intercepted at load time. Done means an agreed design and implementation that records allocation and deallocation size, address, thread ID, and stack trace for post-crash analysis.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- operating-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100