From: Stefan Seefeld <stefan_seefeld@mentor.com>
Date: Wed, 7 Aug 2013 18:34:02 +0000 (-0400)
Subject: Add trace support for memalign and posix_memalign
X-Git-Tag: v2.3.0-rc2~8
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=9d34b2263291fa3007c128d5ec667218884ee50a;p=lttng-ust.git

Add trace support for memalign and posix_memalign

Signed-off-by: Stefan Seefeld <stefan_seefeld@mentor.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/liblttng-ust-libc-wrapper/lttng-ust-malloc.c b/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
index 4fe8fa97..33ed18be 100644
--- a/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
+++ b/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
@@ -133,3 +133,37 @@ void *realloc(void *ptr, size_t size)
 	tracepoint(ust_libc, realloc, ptr, size, retval);
 	return retval;
 }
+
+void *memalign(size_t alignment, size_t size)
+{
+	static void *(*plibc_memalign)(size_t alignment, size_t size);
+	void *retval;
+
+	if (plibc_memalign == NULL) {
+		plibc_memalign = dlsym(RTLD_NEXT, "memalign");
+		if (plibc_memalign == NULL) {
+			fprintf(stderr, "memalignwrap: unable to find memalign\n");
+			return NULL;
+		}
+	}
+	retval = plibc_memalign(alignment, size);
+	tracepoint(ust_libc, memalign, alignment, size, retval);
+	return retval;
+}
+
+int posix_memalign(void **memptr, size_t alignment, size_t size)
+{
+	static int(*plibc_posix_memalign)(void **memptr, size_t alignment, size_t size);
+	int retval;
+
+	if (plibc_posix_memalign == NULL) {
+		plibc_posix_memalign = dlsym(RTLD_NEXT, "posix_memalign");
+		if (plibc_posix_memalign == NULL) {
+			fprintf(stderr, "posix_memalignwrap: unable to find posix_memalign\n");
+			return ENOMEM;
+		}
+	}
+	retval = plibc_posix_memalign(memptr, alignment, size);
+	tracepoint(ust_libc, posix_memalign, *memptr, alignment, size, retval);
+	return retval;
+}
diff --git a/liblttng-ust-libc-wrapper/ust_libc.h b/liblttng-ust-libc-wrapper/ust_libc.h
index d2096a3a..a8ff9c65 100644
--- a/liblttng-ust-libc-wrapper/ust_libc.h
+++ b/liblttng-ust-libc-wrapper/ust_libc.h
@@ -65,6 +65,25 @@ TRACEPOINT_EVENT(ust_libc, realloc,
 	)
 )
 
+TRACEPOINT_EVENT(ust_libc, memalign,
+	TP_ARGS(size_t, alignment, size_t, size, void *, ptr),
+	TP_FIELDS(
+		ctf_integer(size_t, alignment, alignment)
+		ctf_integer(size_t, size, size)
+		ctf_integer_hex(void *, ptr, ptr)
+	)
+)
+
+TRACEPOINT_EVENT(ust_libc, posix_memalign,
+	TP_ARGS(void *, out_ptr, size_t, alignment, size_t, size, int, result),
+	TP_FIELDS(
+		ctf_integer_hex(void *, out_ptr, out_ptr)
+		ctf_integer(size_t, alignment, alignment)
+		ctf_integer(size_t, size, size)
+		ctf_integer(int, result, result)
+	)
+)
+
 #endif /* _TRACEPOINT_UST_LIBC_H */
 
 #undef TRACEPOINT_INCLUDE