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It is often useful to instrument memory management functions in order to find leaks or performance problems. This patch adds trace events for the memory allocation primitives. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
# 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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# 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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# 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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