From 00b9da7219cd027a1c51c3ef576aadbbd9fe38fe Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Wed, 23 May 2012 11:36:42 +0900 Subject: tools lib traceevent: Allow expressions in __print_symbolic() fields The __print_symbolic() function takes a sequence of key-value pairs for pretty-printing a constant. The new kvm:kvm_exit print fmt uses the expression: __print_symbolic(..., { 0x040 + 1, "DB excp" }, ...) Currently only atoms are supported and this print fmt fails to parse. This patch adds support for expressions instead of just atoms so that 0x040 + 1 is parsed successfully. Cc: Avi Kivity Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1337740619-27925-6-git-send-email-namhyung.kim@lge.com Signed-off-by: Namhyung Kim Signed-off-by: Stefan Hajnoczi Signed-off-by: Steven Rostedt Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'tools/lib/traceevent/event-parse.c') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 99853499219..33450c901e1 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -2124,6 +2124,13 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char ** free_token(token); type = process_arg(event, arg, &token); + + if (type == EVENT_OP) + type = process_op(event, arg, &token); + + if (type == EVENT_ERROR) + goto out_free; + if (test_type_token(type, token, EVENT_DELIM, ",")) goto out_free; -- cgit v1.2.3-70-g09d2 From 57d34dc5568f6ac700ef7e5c67f2bd6a8c7c4659 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 23 May 2012 11:36:47 +0900 Subject: tools lib traceevent: Fix a possible memory leak If event_read_fields failed in the middle, each member of struct format_field should be freed also. Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1337740619-27925-11-git-send-email-namhyung.kim@lge.com Signed-off-by: Namhyung Kim Signed-off-by: Steven Rostedt Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'tools/lib/traceevent/event-parse.c') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 33450c901e1..d598b376e3c 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -1434,8 +1434,11 @@ static int event_read_fields(struct event_format *event, struct format_field **f fail: free_token(token); fail_expect: - if (field) + if (field) { + free(field->type); + free(field->name); free(field); + } return -1; } -- cgit v1.2.3-70-g09d2 From d1de10870909a27ce2ac380d0671feb308826491 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 23 May 2012 11:36:49 +0900 Subject: tools lib traceevent: Fix a possibly wrong memory dereference If set_op_prio() failed, the token will be freed at out_free, then arg->op.op would turn out to be a dangle pointer. After returning EVENT_ERROR from process_op(), free_arg() will be called and then it will finally see the dangling pointer. Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1337740619-27925-13-git-send-email-namhyung.kim@lge.com Signed-off-by: Namhyung Kim Signed-off-by: Steven Rostedt Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'tools/lib/traceevent/event-parse.c') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index d598b376e3c..445a43ad42f 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -1715,6 +1715,8 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok) if (set_op_prio(arg) == -1) { event->flags |= EVENT_FL_FAILED; + /* arg->op.op (= token) will be freed at out_free */ + arg->op.op = NULL; goto out_free; } -- cgit v1.2.3-70-g09d2 From b3511d0530c7a2b4fa64d1f5218c5f073ae7b543 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 23 May 2012 11:36:50 +0900 Subject: tools lib traceevent: Fix freeing arg on process_dynamic_array() The @arg paremeter should not be freed inside of process_XXX(), because it'd be freed from the caller of process_arg(). We can free it only after it was reused for local usage. Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1337740619-27925-14-git-send-email-namhyung.kim@lge.com Signed-off-by: Namhyung Kim Signed-off-by: Steven Rostedt Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'tools/lib/traceevent/event-parse.c') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 445a43ad42f..355902795f0 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -2300,17 +2300,18 @@ process_dynamic_array(struct event_format *event, struct print_arg *arg, char ** arg = alloc_arg(); type = process_arg(event, arg, &token); if (type == EVENT_ERROR) - goto out_free; + goto out_free_arg; if (!test_type_token(type, token, EVENT_OP, "]")) - goto out_free; + goto out_free_arg; free_token(token); type = read_token_item(tok); return type; + out_free_arg: + free_arg(arg); out_free: - free(arg); free_token(token); *tok = NULL; return EVENT_ERROR; -- cgit v1.2.3-70-g09d2 From 21c69e721d03e15ac97d01620d4311eaa1c18a46 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 23 May 2012 11:36:51 +0900 Subject: tools lib traceevent: Use proper function parameter type The param needs to be updated when setting args up so that the loop in process_defined_func() can see the correct param->type for the farg. Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1337740619-27925-15-git-send-email-namhyung.kim@lge.com Signed-off-by: Namhyung Kim Signed-off-by: Steven Rostedt Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 1 + 1 file changed, 1 insertion(+) (limited to 'tools/lib/traceevent/event-parse.c') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 355902795f0..554828219c3 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -3375,6 +3375,7 @@ process_defined_func(struct trace_seq *s, void *data, int size, break; } farg = farg->next; + param = param->next; } ret = (*func_handle->func)(s, args); -- cgit v1.2.3-70-g09d2