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readme - describe how to run under Valgrind with dynamic override

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Joris van der Geer 2024-12-02 20:50:08 +10:00
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@ -505,9 +505,13 @@ you also need to tell `valgrind` to not intercept those calls itself, and use:
By setting the `MIMALLOC_SHOW_STATS` environment variable you can check that mimalloc is indeed
used and not the standard allocator. Even though the [Valgrind option][valgrind-soname]
is called `--soname-synonyms`, this also
works when overriding with a static library or object file. Unfortunately, it is not possible to
dynamically override mimalloc using `LD_PRELOAD` together with `valgrind`.
is called `--soname-synonyms`, this also works when overriding with a static library or object file.
To dynamically override mimalloc using `LD_PRELOAD` together with `valgrind`, use:
```
> valgrind --trace-children=yes --soname-synonyms=somalloc=*mimalloc* /usr/bin/env LD_PRELOAD=/usr/lib/libmimalloc.so -- <myprogram>
```
See also the `test/test-wrong.c` file to test with `valgrind`.
Valgrind support is in its initial development -- please report any issues.