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testsuite: fix memory access

Depending on optimization level, the TC_RESULT_STR[]
array could actually be placed in memory instead of
being expanded at compile time, resulting in memory
access errors from user mode.

Just replace TC_RESULT_TO_STR() with an inline function
containing a switch statement instead.

Signed-off-by: Andrew Boie <>
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andrewboie authored and nashif committed May 1, 2019
1 parent afda764 commit a682dedd50080bd14680c100cd1c7db4d7c40328
Showing with 13 additions and 7 deletions.
  1. +13 −7 subsys/testsuite/include/tc_util.h
@@ -58,13 +58,19 @@
#define TC_FAIL 1
#define TC_SKIP 2

static __unused const char *TC_RESULT_STR[] = {

#define TC_RESULT_TO_STR(result) TC_RESULT_STR[result]
static inline const char *TC_RESULT_TO_STR(int result)
switch (result) {
case TC_PASS:
return "PASS";
case TC_FAIL:
return "FAIL";
case TC_SKIP:
return "SKIP";
return "?";

#define TC_ERROR(fmt, ...) \
do { \

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