From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=47930 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OGrJf-0006Rh-E3 for qemu-devel@nongnu.org; Tue, 25 May 2010 06:24:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OGrJd-0001Xm-QQ for qemu-devel@nongnu.org; Tue, 25 May 2010 06:24:55 -0400 Received: from mtagate3.de.ibm.com ([195.212.17.163]:43759) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OGrJd-0001Ry-EZ for qemu-devel@nongnu.org; Tue, 25 May 2010 06:24:53 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate3.de.ibm.com (8.13.1/8.13.1) with ESMTP id o4PAOav0021314 for ; Tue, 25 May 2010 10:24:36 GMT Received: from d12av01.megacenter.de.ibm.com (d12av01.megacenter.de.ibm.com [9.149.165.212]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o4PAOamU909330 for ; Tue, 25 May 2010 12:24:36 +0200 Received: from d12av01.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av01.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id o4PAOZxJ009079 for ; Tue, 25 May 2010 12:24:36 +0200 From: Stefan Hajnoczi Date: Tue, 25 May 2010 11:24:14 +0100 Message-Id: <1274783056-14759-6-git-send-email-stefanha@linux.vnet.ibm.com> In-Reply-To: <1274783056-14759-1-git-send-email-stefanha@linux.vnet.ibm.com> References: <1274783056-14759-1-git-send-email-stefanha@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 5/7] trace: Trace qemu_malloc() and qemu_vmalloc() List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, kvm@vger.kernel.org Cc: Jan Kiszka , Anthony Liguori , Avi Kivity , Stefan Hajnoczi , Prerna Saxena 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 --- v2: * Record pointer result from allocation functions osdep.c | 24 ++++++++++++++++++------ qemu-malloc.c | 12 ++++++++++-- trace-events | 10 ++++++++++ 3 files changed, 38 insertions(+), 8 deletions(-) diff --git a/osdep.c b/osdep.c index abbc8a2..a6b7726 100644 --- a/osdep.c +++ b/osdep.c @@ -50,6 +50,7 @@ #endif #include "qemu-common.h" +#include "trace.h" #include "sysemu.h" #include "qemu_socket.h" @@ -71,25 +72,34 @@ static void *oom_check(void *ptr) #if defined(_WIN32) void *qemu_memalign(size_t alignment, size_t size) { + void *ptr; + if (!size) { abort(); } - return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE)); + ptr = oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE)); + trace_qemu_memalign(alignment, size, ptr); + return ptr; } void *qemu_vmalloc(size_t size) { + void *ptr; + /* FIXME: this is not exactly optimal solution since VirtualAlloc has 64Kb granularity, but at least it guarantees us that the memory is page aligned. */ if (!size) { abort(); } - return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE)); + ptr = oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE)); + trace_qemu_vmalloc(size, ptr); + return ptr; } void qemu_vfree(void *ptr) { + trace_qemu_vfree(ptr); VirtualFree(ptr, 0, MEM_RELEASE); } @@ -97,21 +107,22 @@ void qemu_vfree(void *ptr) void *qemu_memalign(size_t alignment, size_t size) { + void *ptr; #if defined(_POSIX_C_SOURCE) && !defined(__sun__) int ret; - void *ptr; ret = posix_memalign(&ptr, alignment, size); if (ret != 0) { fprintf(stderr, "Failed to allocate %zu B: %s\n", size, strerror(ret)); abort(); } - return ptr; #elif defined(CONFIG_BSD) - return oom_check(valloc(size)); + ptr = oom_check(valloc(size)); #else - return oom_check(memalign(alignment, size)); + ptr = oom_check(memalign(alignment, size)); #endif + trace_qemu_memalign(alignment, size, ptr); + return ptr; } /* alloc shared memory pages */ @@ -122,6 +133,7 @@ void *qemu_vmalloc(size_t size) void qemu_vfree(void *ptr) { + trace_qemu_vfree(ptr); free(ptr); } diff --git a/qemu-malloc.c b/qemu-malloc.c index 6cdc5de..72de60a 100644 --- a/qemu-malloc.c +++ b/qemu-malloc.c @@ -22,6 +22,7 @@ * THE SOFTWARE. */ #include "qemu-common.h" +#include "trace.h" #include static void *oom_check(void *ptr) @@ -39,6 +40,7 @@ void *get_mmap_addr(unsigned long size) void qemu_free(void *ptr) { + trace_qemu_free(ptr); free(ptr); } @@ -53,18 +55,24 @@ static int allow_zero_malloc(void) void *qemu_malloc(size_t size) { + void *ptr; if (!size && !allow_zero_malloc()) { abort(); } - return oom_check(malloc(size ? size : 1)); + ptr = oom_check(malloc(size ? size : 1)); + trace_qemu_malloc(size, ptr); + return ptr; } void *qemu_realloc(void *ptr, size_t size) { + void *newptr; if (!size && !allow_zero_malloc()) { abort(); } - return oom_check(realloc(ptr, size ? size : 1)); + newptr = oom_check(realloc(ptr, size ? size : 1)); + trace_qemu_realloc(ptr, size, newptr); + return newptr; } void *qemu_mallocz(size_t size) diff --git a/trace-events b/trace-events index 5efaa86..3fde0c6 100644 --- a/trace-events +++ b/trace-events @@ -24,3 +24,13 @@ # system may not have the necessary headers included. # # The should be a sprintf()-compatible format string. + +# qemu-malloc.c +qemu_malloc(size_t size, void *ptr) "size %zu ptr %p" +qemu_realloc(void *ptr, size_t size, void *newptr) "ptr %p size %zu newptr %p" +qemu_free(void *ptr) "ptr %p" + +# osdep.c +qemu_memalign(size_t alignment, size_t size, void *ptr) "alignment %zu size %zu ptr %p" +qemu_valloc(size_t size, void *ptr) "size %zu ptr %p" +qemu_vfree(void *ptr) "ptr %p" -- 1.7.1