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trace: Use portable format strings 

It is not portable to use "%ld" for int64_t because int64_t may have
type long on 64-bit platforms and long long on 32-bit platforms.  Use
the standard library PRId64 macros to keep format strings portable.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Stefan Hajnoczi 2010-10-05 14:28:50 +01:00 committed by Blue Swirl
parent 3e18c6bf77
commit 9a85d39447
2 changed files with 6 additions and 2 deletions
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4
docs/tracing.txt
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@ -72,6 +72,10 @@ Trace events should use types as follows:
* For everything else, use primitive scalar types (char, int, long) with the
appropriate signedness.
Format strings should reflect the types defined in the trace event. Take
special care to use PRId64 and PRIu64 for int64_t and uint64_t types,
respectively. This ensures portability between 32- and 64-bit platforms.
=== Hints for adding new trace events ===
1. Trace state changes in the code. Interesting points in the code usually

4
trace-events
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@ -55,10 +55,10 @@ disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
# hw/virtio-blk.c
disable virtio_blk_req_complete(void *req, int status) "req %p status %d"
disable virtio_blk_rw_complete(void *req, int ret) "req %p ret %d"
disable virtio_blk_handle_write(void *req, unsigned long sector, unsigned long nsectors) "req %p sector %lu nsectors %lu"
disable virtio_blk_handle_write(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu"
# posix-aio-compat.c
disable paio_submit(void *acb, void *opaque, unsigned long sector_num, unsigned long nb_sectors, unsigned long type) "acb %p opaque %p sector_num %lu nb_sectors %lu type %lu"
disable paio_submit(void *acb, void *opaque, int64_t sector_num, int nb_sectors, int type) "acb %p opaque %p sector_num %"PRId64" nb_sectors %d type %d"
# ioport.c
disable cpu_in(unsigned int addr, unsigned int val) "addr %#x value %u"