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# Trace events for debugging and performance instrumentation |
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# |
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# This file is processed by the tracetool script during the build. |
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# |
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# To add a new trace event: |
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# |
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# 1. Choose a name for the trace event. Declare its arguments and format |
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# string. |
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# |
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# 2. Call the trace event from code using trace_##name, e.g. multiwrite_cb() -> |
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# trace_multiwrite_cb(). The source file must #include "trace.h". |
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# |
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# Format of a trace event: |
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# |
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# [disable] <name>(<type1> <arg1>[, <type2> <arg2>] ...) "<format-string>" |
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# |
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# Example: qemu_malloc(size_t size) "size %zu" |
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# |
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# The "disable" keyword will build without the trace event. |
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# In case of 'simple' trace backend, it will allow the trace event to be |
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# compiled, but this would be turned off by default. It can be toggled on via |
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# the monitor. |
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# |
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# The <name> must be a valid as a C function name. |
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# |
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# Types should be standard C types. Use void * for pointers because the trace |
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# system may not have the necessary headers included. |
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# |
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# The <format-string> should be a sprintf()-compatible format string. |
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|
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# qemu-malloc.c |
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disable qemu_malloc(size_t size, void *ptr) "size %zu ptr %p" |
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disable qemu_realloc(void *ptr, size_t size, void *newptr) "ptr %p size %zu newptr %p" |
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disable qemu_free(void *ptr) "ptr %p" |
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|
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# osdep.c |
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disable qemu_memalign(size_t alignment, size_t size, void *ptr) "alignment %zu size %zu ptr %p" |
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disable qemu_valloc(size_t size, void *ptr) "size %zu ptr %p" |
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disable qemu_vfree(void *ptr) "ptr %p" |
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|
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# block.c |
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disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d" |
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disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb %p num_callbacks %d num_reqs %d" |
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disable bdrv_aio_multiwrite_earlyfail(void *mcb) "mcb %p" |
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disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d" |
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|
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# hw/virtio-blk.c |
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disable virtio_blk_req_complete(void *req, int status) "req %p status %d" |
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disable virtio_blk_rw_complete(void *req, int ret) "req %p ret %d" |
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disable virtio_blk_handle_write(void *req, unsigned long sector, unsigned long nsectors) "req %p sector %lu nsectors %lu" |
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|
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# posix-aio-compat.c |
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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" |