sim-card
/
qemu
Archived
10
0
Fork 0
Code Releases Activity

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>
This commit is contained in:
Lluís Vilanova 2011-09-20 21:03:48 +02:00 committed by Stefan Hajnoczi
parent 6c2a407426
commit 4b710a3cd4
1 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
docs/tracing.txt
View File

@ -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 file. Each trace event declaration names the event, its arguments, and the
format string which can be used for pretty-printing: format string which can be used for pretty-printing:
qemu_malloc(size_t size, void *ptr) "size %zu ptr %p" qemu_vmalloc(size_t size, void *ptr) "size %zu ptr %p"
qemu_free(void *ptr) "ptr %p" qemu_vfree(void *ptr) "ptr %p"
The "trace-events" file is processed by the "tracetool" script during build to 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 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 */ #include "trace.h" /* needed for trace event prototype */
void *qemu_malloc(size_t size) void *qemu_vmalloc(size_t size)
{ {
void *ptr; void *ptr;
if (!size && !allow_zero_malloc()) { size_t align = QEMU_VMALLOC_ALIGN;
abort();
if (size < align) {
align = getpagesize();
} }
ptr = oom_check(malloc(size ? size : 1)); ptr = qemu_memalign(align, size);
trace_qemu_malloc(size, ptr); /* <-- trace event */ trace_qemu_vmalloc(size, ptr);
return ptr; return ptr;
} }