Changeset 6bb136b2 in mainline for uspace/lib/c/generic/stacktrace.c

Timestamp:

2018-07-31T12:32:34Z (7 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b79903b, d742db21

Parents:

d4b7b29

git-author:

Jiri Svoboda <jiri@…> (2018-07-30 20:18:16)

git-committer:

Jiri Svoboda <jiri@…> (2018-07-31 12:32:34)

Message:

Limit userspace stack trace depth.

File:

• uspace/lib/c/generic/stacktrace.c (modified) (3 diffs)

uspace/lib/c/generic/stacktrace.c

@@ -41 +41 @@
 #include <io/kio.h>
 
+#define STACK_FRAMES_MAX 20
+
 static errno_t stacktrace_read_uintptr(void *arg, uintptr_t addr, uintptr_t *data);
 
@@ -56 +58 @@
     uintptr_t pc)
 {
+        int cnt = 0;
         stacktrace_t st;
         uintptr_t nfp;
@@ -63 +66 @@
         st.ops = ops;
 
-        while (stacktrace_fp_valid(&st, fp)) {
+        while (cnt++ < STACK_FRAMES_MAX && stacktrace_fp_valid(&st, fp)) {
                 ops->printf("%p: %p()\n", (void *) fp, (void *) pc);
                 rc =  stacktrace_ra_get(&st, fp, &pc);