Patchwork [5/5] trace: Update docs to use example events that exist

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Submitter Stefan Hajnoczi
Date Sept. 21, 2011, 10:36 a.m.
Message ID <1316601397-19287-6-git-send-email-stefanha@linux.vnet.ibm.com>
Download mbox | patch
Permalink /patch/115760/
State New
Headers show

Comments

Stefan Hajnoczi - Sept. 21, 2011, 10:36 a.m.
From: Lluís Vilanova <vilanova@ac.upc.edu>

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>
---
 docs/tracing.txt |   16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)

Patch

diff --git a/docs/tracing.txt b/docs/tracing.txt
index 2c33a62..95ca16c 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;
     }