bdwgc/bdwgc

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3529 stars · 443 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

The Boehm-Demers-Weiser conservative garbage collector (libgc) for C and C++, usable as a drop-in replacement for malloc/new that automatically reclaims unreachable memory. It can also serve as a memory leak detector and is used by many language runtime implementations.

Use cases

• add garbage collection to a C or C++ program without manual free calls
• replace malloc with GC_malloc to avoid memory leaks
• detect memory leaks in existing C/C++ code
• provide a GC runtime for a programming language implemented on top of C
• allocate memory without explicit deallocation in long-running applications

When to choose

• you want automatic memory management in C or C++ with minimal code changes
• you are building a language runtime that needs a battle-tested conservative GC
• you need a portable, cross-platform GC library with broad platform support
• you want to use the collector as a leak detector for legacy code

When to avoid

• you need precise, deterministic memory reclamation or real-time guarantees
• your codebase relies on hidden or obfuscated pointers that a conservative collector may miss
• you need strict bounding of memory usage in the presence of stale pointers
• you prefer modern smart pointers or RAII over garbage collection

Facets

library · maturity stable

developer-tools developer-tools programming-languages performance cross-platform windows cpp c garbage-collection memory-management memory-allocation leak-detection conservative-gc c cpp linux macos

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