Hi all,
I found a bug in gnuradio-core/src/lib/general/gri_fft.cc, in function:
static const char * wisdom_filename ()
It returns pointer to char string from temporary object created by call
to path.string(). Obviously, this pointer is pointing to garbage after exit
from wisdom_filename() function.
I propose something like this:
gnuradio-core/src/lib/general/gri_fft.cc | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/gnuradio-core/src/lib/general/gri_fft.cc
b/gnuradio-core/src/lib/general/gri_fft.cc
index 68e7e69..906279b 100644
--- a/gnuradio-core/src/lib/general/gri_fft.cc
+++ b/gnuradio-core/src/lib/general/gri_fft.cc
@@ -73,18 +73,19 @@ gri_fft_planner::mutex()
return s_planning_mutex;
}
-static const char *
+static std::string
wisdom_filename ()
{
static fs::path path;
path = fs::path(gr_appdata_path()) / ".gr_fftw_wisdom";
- return path.string().c_str();
+ return path.string();
}
static void
gri_fftw_import_wisdom ()
{
- const char *filename = wisdom_filename ();
+ const std::string & s = wisdom_filename ();
+ const char *filename = s.c_str ();
FILE *fp = fopen (filename, "r");
if (fp != 0){
int r = fftwf_import_wisdom_from_file (fp);
@@ -114,7 +115,8 @@ gri_fftw_config_threading (int nthreads)
static void
gri_fftw_export_wisdom ()
{
- const char *filename = wisdom_filename ();
+ const std::string & s = wisdom_filename ();
+ const char *filename = s.c_str ();
FILE *fp = fopen (filename, "w");
if (fp != 0){
fftwf_export_wisdom_to_file (fp);
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