* defs.h (QUAL_STACKTRACE): Add new qual flag.
(stacktrace): Add macro for checking QUAL_STACKTRACE.
(stack_trace_enabled): Change description.
* filter_action.c (action_types): Declare and add new filter action type.
(update_default_flags): Update stack_trace_enabled.
* strace.c (stack_trace_enabled): Change description.
(init): Use filtering_parse for -k option.
* syscall.c (syscall_entering_trace, syscall_exiting_decode,
syscall_exiting_trace): Use stacktrace macro instead of
stack_trace_enabled.
* unwind.c (apply_stacktrace): Add filter action function.
---
defs.h | 6 +++++-
filter_action.c | 11 +++++++++++
strace.c | 4 ++--
syscall.c | 6 +++---
unwind.c | 6 ++++++
5 files changed, 27 insertions(+), 6 deletions(-)
diff --git a/defs.h b/defs.h
index de9d60e2..e1df8090 100644
--- a/defs.h
+++ b/defs.h
@@ -257,6 +257,9 @@ struct tcb {
#define QUAL_SIGNAL 0x100 /* report events with this signal */
#define QUAL_READ 0x200 /* dump data read in this syscall */
#define QUAL_WRITE 0x400 /* dump data written in this syscall */
+#ifdef USE_LIBUNWIND
+# define QUAL_STACKTRACE 0x800 /* do the stack trace */
+#endif
#define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
@@ -270,6 +273,7 @@ struct tcb {
#define inject(tcp) ((tcp)->qual_flg & QUAL_INJECT)
#define dump_read(tcp) ((tcp)->qual_flg & QUAL_READ)
#define dump_write(tcp) ((tcp)->qual_flg & QUAL_WRITE)
+#define stacktrace(tcp) ((tcp)->qual_flg & QUAL_STACKTRACE)
#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
#define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
@@ -375,7 +379,7 @@ extern struct path_set {
extern unsigned xflag;
extern unsigned followfork;
#ifdef USE_LIBUNWIND
-/* if this is true do the stack trace for every system call */
+/* if this is true do the initialization of stack tracing mechanism */
extern bool stack_trace_enabled;
#endif
extern unsigned ptrace_setoptions;
diff --git a/filter_action.c b/filter_action.c
index 697a71ce..85c296e1 100644
--- a/filter_action.c
+++ b/filter_action.c
@@ -41,6 +41,9 @@ DECL_FILTER_ACTION(write);
DECL_FILTER_ACTION(raw);
DECL_FILTER_ACTION(abbrev);
DECL_FILTER_ACTION(verbose);
+# ifdef USE_LIBUNWIND
+DECL_FILTER_ACTION(stacktrace);
+# endif
#undef DECL_FILTER_ACTION
extern bool is_traced(struct tcb *);
@@ -77,6 +80,9 @@ static const struct filter_action_type {
FILTER_ACTION_TYPE(raw, 2, QUAL_RAW, null,
is_traced),
FILTER_ACTION_TYPE(abbrev, 2, QUAL_ABBREV, null,
is_traced),
FILTER_ACTION_TYPE(verbose, 2, QUAL_VERBOSE, null,
is_traced),
+# ifdef USE_LIBUNWIND
+ FILTER_ACTION_TYPE(stacktrace, 2, QUAL_STACKTRACE, null,
is_traced),
+# endif
};
#undef FILTER_ACTION_TYPE
@@ -173,6 +179,11 @@ add_action(const struct filter_action_type *type)
/* Update default_flags */
if (default_flags & type->qual_flg)
default_flags &= ~type->qual_flg;
+ /* Enable stack tracing. */
+#ifdef USE_LIBUNWIND
+ if (type->qual_flg & QUAL_STACKTRACE)
+ stack_trace_enabled = true;
+#endif
filter_actions = xreallocarray(filter_actions, ++nfilter_actions,
sizeof(struct filter_action));
diff --git a/strace.c b/strace.c
index eb2665a5..0e27a9ef 100644
--- a/strace.c
+++ b/strace.c
@@ -57,7 +57,7 @@ extern int optind;
extern char *optarg;
#ifdef USE_LIBUNWIND
-/* if this is true do the stack trace for every system call */
+/* if this is true do the initialization of stack tracing mechanism */
bool stack_trace_enabled;
#endif
@@ -1694,7 +1694,7 @@ init(int argc, char *argv[])
break;
#ifdef USE_LIBUNWIND
case 'k':
- stack_trace_enabled = true;
+ filtering_parse("stacktrace(syscall all)");
break;
#endif
case 'E':
diff --git a/syscall.c b/syscall.c
index 492858ca..41245e13 100644
--- a/syscall.c
+++ b/syscall.c
@@ -687,7 +687,7 @@ syscall_entering_trace(struct tcb *tcp, unsigned int *sig)
}
#ifdef USE_LIBUNWIND
- if (stack_trace_enabled) {
+ if (stacktrace(tcp)) {
if (tcp->s_ent->sys_flags & STACKTRACE_CAPTURE_ON_ENTER)
unwind_capture_stacktrace(tcp);
}
@@ -732,7 +732,7 @@ syscall_exiting_decode(struct tcb *tcp, struct timeval *ptv)
gettimeofday(ptv, NULL);
#ifdef USE_LIBUNWIND
- if (stack_trace_enabled) {
+ if (stacktrace(tcp)) {
if (tcp->s_ent->sys_flags & STACKTRACE_INVALIDATE_CACHE)
unwind_cache_invalidate(tcp);
}
@@ -952,7 +952,7 @@ syscall_exiting_trace(struct tcb *tcp, struct timeval tv,
int res)
line_ended();
#ifdef USE_LIBUNWIND
- if (stack_trace_enabled)
+ if (stacktrace(tcp))
unwind_print_stacktrace(tcp);
#endif
return 0;
diff --git a/unwind.c b/unwind.c
index 919b63c3..caab4143 100644
--- a/unwind.c
+++ b/unwind.c
@@ -589,3 +589,9 @@ unwind_capture_stacktrace(struct tcb *tcp)
DPRINTF("tcp=%p, queue=%p", "captured", tcp, tcp->queue->head);
}
}
+
+void
+apply_stacktrace(struct tcb *tcp, void *_priv_data)
+{
+ tcp->qual_flg |= QUAL_STACKTRACE;
+}
--
2.11.0
------------------------------------------------------------------------------
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