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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-01 09:56:08 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-07 10:27:20 -0300 |
| commit | fee9e40a8da75fad9717668f6dddcc26f3feca2d (patch) | |
| tree | 318af06cfcad98364192c6b01bb2a0ed6a08b577 /malloc/arena.c | |
| parent | 6afce56c197ee83520994a2c94a82c2ca2bce9fa (diff) | |
| download | glibc-fee9e40a8da75fad9717668f6dddcc26f3feca2d.zip glibc-fee9e40a8da75fad9717668f6dddcc26f3feca2d.tar.gz glibc-fee9e40a8da75fad9717668f6dddcc26f3feca2d.tar.bz2 | |
malloc: Decorate malloc maps
Add anonymous mmap annotations on loader malloc, malloc when it
allocates memory with mmap, and on malloc arena. The /proc/self/maps
will now print:
[anon: glibc: malloc arena]
[anon: glibc: malloc]
[anon: glibc: loader malloc]
On arena allocation, glibc annotates only the read/write mapping.
Checked on x86_64-linux-gnu and aarch64-linux-gnu.
Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'malloc/arena.c')
| -rw-r--r-- | malloc/arena.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/malloc/arena.c b/malloc/arena.c index 6f03955..d1e214a 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -17,6 +17,7 @@ not, see <https://www.gnu.org/licenses/>. */ #include <stdbool.h> +#include <setvmaname.h> #define TUNABLE_NAMESPACE malloc #include <elf/dl-tunables.h> @@ -436,6 +437,9 @@ alloc_new_heap (size_t size, size_t top_pad, size_t pagesize, return 0; } + /* Only considere the actual usable range. */ + __set_vma_name (p2, size, " glibc: malloc arena"); + madvise_thp (p2, size); h = (heap_info *) p2; |