Bug 133735
| Summary: | Multi-threaded 32 bit cores can't be used on 64 bit systems | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Stephen Sanders <ssanders> |
| Component: | threads | Assignee: | attilio |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | Unspecified | ||
| Hardware: | Any | ||
| OS: | Any | ||
Responsible Changed From-To: freebsd-bugs->freebsd-threads Over to maintainer(s). State Changed From-To: open->patched This should be fixed in HEAD now (by marcel's changes). There are plans to MFC to 6 & 7. Responsible Changed From-To: freebsd-threads->emaste Grab to keep track of this. Responsible Changed From-To: emaste->attilio Assign to Attilio for tracking; he will MFC (some of) Marcel's changes to libthread_db for this support. State Changed From-To: patched->closed Fixed by r189416, r192320, r192098, r193789, r181651, r193838. |
The following program will produce a core file. Running the program on a FreeBSD 6.3/64 bit system will produce a core file. Attempts to use gdb on the core will fail on the following error: Core was generated by `threadcore'. Program terminated with signal 11, Segmentation fault. Reading symbols from /usr/lib32/libpthread.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib32/libpthread.so.2 Reading symbols from /usr/lib32/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib32/libc.so.6 Reading symbols from /libexec/ld-elf.so.1...(no debugging symbols found)...done. Loaded symbols for /libexec/ld-elf.so.1 #0 0x0804d100 in ?? () [New Thread 0x805301408053200 (runnable)] [New Thread 0x280a05a808053000 (runnable)] Cannot get thread info: generic error (gdb) --------------------------- The Program ------------------ #include <sys/types.h> #include <signal.h> #include <pthread.h> #include <unistd.h> #include <stdio.h> #include <err.h> void *thr(void *a) { int *ip = (int *)a; printf("started thread %d\n", *ip); pause(); return 0; } int main(int argc, char **argv) { const int THREADCOUNT =4; int i; pthread_t threads[THREADCOUNT]; for (i =0; i < THREADCOUNT; i++) if (pthread_create(&threads[i], 0, thr, (void *)&i) != 0) errx(-1, "cannot create thread"); sleep(1); kill(0, SIGBUS); return 0; } How-To-Repeat: Compile the program in the description section on a FreeBSD 6.3/32 bit system. Run it on a 6.3/64 bit system and attempt to look at the core file ('info threads' for example)