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dt_unring_buf: set dtbd_oldest to the start of the first record

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It was set to the start of the buffer and that can be different from the
start of teh first record because of a misalignment.

This change follows the example of dt_realloc_buf().

Reviewed by:	tsoome, markj
MFC after:	4 weeks
Differential Revision:	https://reviews.freebsd.org/D33649
This commit is contained in:
Andriy Gapon 2022-01-11 15:44:04 +02:00
parent 75bc7150f4
commit 256c8c5df2
1 changed files with 1 additions and 1 deletions
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2
cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
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@ -2621,7 +2621,7 @@ dt_unring_buf(dtrace_hdl_t *dtp, dtrace_bufdesc_t *buf)
bcopy(buf->dtbd_data, ndp, buf->dtbd_oldest);
dt_free(dtp, buf->dtbd_data);
buf->dtbd_oldest = 0;
buf->dtbd_oldest = misalign;
buf->dtbd_data = newdata;
buf->dtbd_size += misalign;