diff options
author | Lluís Vilanova <vilanova@ac.upc.edu> | 2011-09-20 21:03:48 +0200 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2011-09-21 11:32:37 +0100 |
commit | 4b710a3cd410eb4eb39fbad2e38efe82c502250e (patch) | |
tree | 58386ae6c38b8dfd2b117740c888d64403ffe4d5 /docs/tracing.txt | |
parent | 6c2a40742602c3cbe6a3905229dd539d7c311550 (diff) |
trace: Update docs to use example events that exist
The events 'qemu_malloc' and 'qemu_free' used in the examples no longer exist,
so use 'qemu_vmalloc' and 'qemu_vfree' instead.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'docs/tracing.txt')
-rw-r--r-- | docs/tracing.txt | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/docs/tracing.txt b/docs/tracing.txt index 2c33a62b98..95ca16c05d 100644 --- a/docs/tracing.txt +++ b/docs/tracing.txt @@ -31,8 +31,8 @@ There is a set of static trace events declared in the "trace-events" source file. Each trace event declaration names the event, its arguments, and the format string which can be used for pretty-printing: - qemu_malloc(size_t size, void *ptr) "size %zu ptr %p" - qemu_free(void *ptr) "ptr %p" + qemu_vmalloc(size_t size, void *ptr) "size %zu ptr %p" + qemu_vfree(void *ptr) "ptr %p" The "trace-events" file is processed by the "tracetool" script during build to generate code for the trace events. Trace events are invoked directly from @@ -40,14 +40,16 @@ source code like this: #include "trace.h" /* needed for trace event prototype */ - void *qemu_malloc(size_t size) + void *qemu_vmalloc(size_t size) { void *ptr; - if (!size && !allow_zero_malloc()) { - abort(); + size_t align = QEMU_VMALLOC_ALIGN; + + if (size < align) { + align = getpagesize(); } - ptr = oom_check(malloc(size ? size : 1)); - trace_qemu_malloc(size, ptr); /* <-- trace event */ + ptr = qemu_memalign(align, size); + trace_qemu_vmalloc(size, ptr); return ptr; } |