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crash-trace-command
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crash-trace-command/SOURCES/linux_4.2_support.patch

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--- crash-trace-command-2.0/trace.c.orig
+++ crash-trace-command-2.0/trace.c
@@ -34,6 +34,10 @@ static int encapsulated_current_trace;
* trace_buffer is supported
*/
static int trace_buffer_available;
+/*
+ * max_buffer is supported
+ */
+static int max_buffer_available;
#define koffset(struct, member) struct##_##member##_offset
@@ -154,6 +158,7 @@ static int init_offsets(void)
if (koffset(struct, member) < 0) { \
fprintf(fp, "failed to init the offset, struct:"\
#struct ", member:" #member); \
+ fprintf(fp, "\n"); \
return -1; \
} \
} while (0)
@@ -163,8 +168,10 @@ static int init_offsets(void)
if (trace_buffer_available) {
init_offset(trace_array, trace_buffer);
- init_offset(trace_array, max_buffer);
init_offset(trace_buffer, buffer);
+
+ if (max_buffer_available)
+ init_offset(trace_array, max_buffer);
} else {
init_offset(trace_array, buffer);
}
@@ -176,6 +183,9 @@ static int init_offsets(void)
fprintf(fp, "per cpu buffer sizes\n");
}
+ if (kernel_symbol_exists("ring_buffer_read"))
+ gdb_set_crash_scope(symbol_value("ring_buffer_read"), "ring_buffer_read");
+
if (!per_cpu_buffer_sizes)
init_offset(ring_buffer, pages);
init_offset(ring_buffer, flags);
@@ -205,7 +215,12 @@ static int init_offsets(void)
init_offset(list_head, next);
- init_offset(ftrace_event_call, list);
+ koffset(ftrace_event_call, list) = MAX(MEMBER_OFFSET("ftrace_event_call", "list"),
+ MEMBER_OFFSET("trace_event_call", "list"));
+ if (koffset(ftrace_event_call, list) < 0) {
+ fprintf(fp, "failed to init the offset, struct:[f]trace_event_call member:list)\n");
+ return -1; \
+ }
init_offset(ftrace_event_field, link);
init_offset(ftrace_event_field, name);
@@ -448,6 +463,9 @@ out_fail:
static int ftrace_int_max_tr_trace(void)
{
if (trace_buffer_available) {
+ if (!max_buffer_available)
+ return 0;
+
global_max_buffer = global_trace + koffset(trace_array, max_buffer);
read_value(max_tr_ring_buffer, global_max_buffer, trace_buffer, buffer);
} else {
@@ -528,6 +546,9 @@ static int ftrace_init(void)
if (MEMBER_EXISTS("trace_array", "trace_buffer")) {
trace_buffer_available = 1;
+
+ if (MEMBER_EXISTS("trace_array", "max_buffer"))
+ max_buffer_available = 1;
} else {
sym_max_tr_trace = symbol_search("max_tr");
if (sym_max_tr_trace == NULL)
@@ -710,7 +731,8 @@ static int syscall_get_enter_fields(ulon
goto work;
inited = 1;
- data_offset = MEMBER_OFFSET("ftrace_event_call", "data");
+ data_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "data"),
+ MEMBER_OFFSET("trace_event_call", "data"));
if (data_offset < 0)
return -1;
@@ -742,7 +764,8 @@ static int syscall_get_exit_fields_old(u
goto work;
inited = 1;
- data_offset = MEMBER_OFFSET("ftrace_event_call", "data");
+ data_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "data"),
+ MEMBER_OFFSET("trace_event_call", "data"));
if (data_offset < 0)
return -1;
@@ -803,18 +826,22 @@ int ftrace_get_event_type_fields(ulong c
goto work;
inited = 1;
- fields_offset = MEMBER_OFFSET("ftrace_event_call", "fields");
+ fields_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "fields"),
+ MEMBER_OFFSET("trace_event_call", "fields"));
- class_offset = MEMBER_OFFSET("ftrace_event_call", "class");
+ class_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "class"),
+ MEMBER_OFFSET("trace_event_call", "class"));
if (class_offset < 0)
goto work;
inited = 2;
- fields_offset = MEMBER_OFFSET("ftrace_event_class", "fields");
+ fields_offset = MAX(MEMBER_OFFSET("ftrace_event_class", "fields"),
+ MEMBER_OFFSET("trace_event_class", "fields"));
if (fields_offset < 0)
return -1;
- get_fields_offset = MEMBER_OFFSET("ftrace_event_class", "get_fields");
+ get_fields_offset = MAX(MEMBER_OFFSET("ftrace_event_class", "get_fields"),
+ MEMBER_OFFSET("trace_event_class", "get_fields"));
if ((sp = symbol_search("syscall_get_enter_fields")) != NULL)
syscall_get_enter_fields_value = sp->value;
if ((sp = symbol_search("syscall_get_exit_fields")) != NULL)
@@ -988,19 +1015,45 @@ static void ftrace_destroy_event_types(v
free(ftrace_common_fields);
}
+#define TRACE_EVENT_FL_TRACEPOINT 0x40
+
static
int ftrace_get_event_type_name(ulong call, char *name, int len)
{
static int inited;
static int name_offset;
+ static int flags_offset;
+ static int tp_name_offset;
+ uint flags;
ulong name_addr;
- if (!inited) {
- inited = 1;
- name_offset = MEMBER_OFFSET("ftrace_event_call", "name");
- }
+ if (inited)
+ goto work;
+ inited = 1;
+ name_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "name"),
+ MEMBER_OFFSET("trace_event_call", "name"));
+ if (name_offset >= 0)
+ goto work;
+
+ name_offset = MAX(ANON_MEMBER_OFFSET("ftrace_event_call", "name"),
+ ANON_MEMBER_OFFSET("trace_event_call", "name"));
+ if (name_offset < 0)
+ return -1;
+
+ flags_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "flags"),
+ MEMBER_OFFSET("trace_event_call", "flags"));
+ if (flags_offset < 0)
+ return -1;
+
+ tp_name_offset = MEMBER_OFFSET("tracepoint", "name");
+ if (tp_name_offset < 0)
+ return -1;
+
+ inited = 2;
+
+work:
if (name_offset < 0)
return -1;
@@ -1008,6 +1061,21 @@ int ftrace_get_event_type_name(ulong cal
"read ftrace_event_call name_addr", RETURN_ON_ERROR))
return -1;
+ if (inited == 2) {
+ if (!readmem(call + flags_offset, KVADDR, &flags,
+ sizeof(flags), "read ftrace_event_call flags",
+ RETURN_ON_ERROR))
+ return -1;
+
+ if (flags & TRACE_EVENT_FL_TRACEPOINT) {
+ if (!readmem(name_addr + tp_name_offset, KVADDR,
+ &name_addr, sizeof(name_addr),
+ "read tracepoint name", RETURN_ON_ERROR))
+ return -1;
+ }
+
+ }
+
if (!read_string(name_addr, name, len))
return -1;
@@ -1028,16 +1096,19 @@ int ftrace_get_event_type_system(ulong c
goto work;
inited = 1;
- sys_offset = MEMBER_OFFSET("ftrace_event_call", "system");
+ sys_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "system"),
+ MEMBER_OFFSET("trace_event_call", "system"));
if (sys_offset >= 0)
goto work;
- class_offset = MEMBER_OFFSET("ftrace_event_call", "class");
+ class_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "class"),
+ MEMBER_OFFSET("trace_event_call", "class"));
if (class_offset < 0)
return -1;
- sys_offset = MEMBER_OFFSET("ftrace_event_class", "system");
+ sys_offset = MAX(MEMBER_OFFSET("ftrace_event_class", "system"),
+ MEMBER_OFFSET("trace_event_class", "system"));
inited = 2;
work:
@@ -1109,7 +1180,8 @@ int ftrace_get_event_type_print_fmt(ulon
if (!inited) {
inited = 1;
- fmt_offset = MEMBER_OFFSET("ftrace_event_call", "print_fmt");
+ fmt_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "print_fmt"),
+ MEMBER_OFFSET("trace_event_call", "print_fmt"));
}
if (fmt_offset < 0) {
@@ -1132,11 +1204,13 @@ int ftrace_get_event_type_id(ulong call,
if (!inited) {
inited = 1;
- id_offset = MEMBER_OFFSET("ftrace_event_call", "id");
+ id_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "id"),
+ MEMBER_OFFSET("trace_event_call", "id"));
if (id_offset < 0) {
/* id = call->event.type */
- int f1 = MEMBER_OFFSET("ftrace_event_call", "event");
+ int f1 = MAX(MEMBER_OFFSET("ftrace_event_call", "event"),
+ MEMBER_OFFSET("trace_event_call", "event"));
int f2 = MEMBER_OFFSET("trace_event", "type");
if (f1 >= 0 && f2 >= 0)
@@ -1495,7 +1569,6 @@ static void ftrace_show(int argc, char *
FILE *file;
size_t ret;
size_t nitems __attribute__ ((__unused__));
- char *unused __attribute__ ((__unused__));
/* check trace-cmd */
if (env_trace_cmd)
@@ -1519,8 +1592,9 @@ static void ftrace_show(int argc, char *
}
/* dump trace.dat to the temp file */
- unused = mktemp(tmp);
- fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+ fd = mkstemp(tmp);
+ if (fd < 0)
+ return;
if (trace_cmd_data_output(fd) < 0)
goto out;
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