jepler/tmperamental
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

(nonportable) print stack trace when enforcer fires

Browse source 
.. also, print all messages to stderr instead of stdout

backtrace() and backtrace_symbols_fd() are GNU extensions in libc
enabled by _GNU_SOURCE
This commit is contained in:
Jeff Epler 2012-09-03 21:29:29 -05:00
parent 509b0c58b5
commit 3b4e63a696
1 changed files with 11 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
src/tmperamental.c
View file

@ -34,6 +34,9 @@
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <execinfo.h>
#include "tmperamental.h"
@ -55,9 +58,16 @@ static void tmperamental_init ( void ) {
orig_freopen = dlsym(RTLD_NEXT, "freopen");
}
#define SIZE (100)
#define FIRST_FRAME (1)
void enforcer ( const char * pathname ) {
if ( strncmp("/tmp/", pathname, 5) == 0 ) {
printf("tmperamental: caught a write to /tmp.\n");
int nframes;
void *buffer[SIZE];
fprintf(stderr, "tmperamental: caught a write to /tmp.\n");
nframes = backtrace(buffer, SIZE);
if(nframes > FIRST_FRAME)
backtrace_symbols_fd(buffer+FIRST_FRAME, nframes+FIRST_FRAME, 2);
abort();
}
}