diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-12-14 10:46:54 -0500 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-12-21 15:29:55 -0500 |
| commit | 2bc2d8e82350d451426c6b4fe5ab116f9fc3c205 (patch) | |
| tree | ca960bd725d81ef222439b5ef1e0c83db66153dc | |
| parent | 147d03b01c9a8b17530a36b43d3ee29b7b14ebd0 (diff) | |
tile: fix DWARF bug in clone() for created thread
Previously, we would see a bad frame in the gdb backtrace output, e.g.:
(gdb) bt
#0 foo () at foo.c:5
#1 0x000000aaaab68ee8 in start_thread () from /lib/libpthread.so.0
#2 0x000000aaaad01c88 in clone () from /lib/libc.so.6
#3 0x0000000000000000 in ?? ()
With this change the bogus frame #3 is gone and we have the
same output as x86 does for the same program.
| -rw-r--r-- | ports/ChangeLog.tile | 4 | ||||
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/tile/nptl/clone.S | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/ports/ChangeLog.tile b/ports/ChangeLog.tile index 67dc50c289..da39a6efae 100644 --- a/ports/ChangeLog.tile +++ b/ports/ChangeLog.tile @@ -1,3 +1,7 @@ +2012-12-14 Chris Metcalf <cmetcalf@tilera.com> + + * sysdeps/unix/sysv/linux/tile/nptl/clone.S: Fix DWARF info. + 2012-11-29 Chris Metcalf <cmetcalf@tilera.com> * sysdeps/tile/s_fmaf.c: Remove redundant #defines now provided diff --git a/ports/sysdeps/unix/sysv/linux/tile/nptl/clone.S b/ports/sysdeps/unix/sysv/linux/tile/nptl/clone.S index de4fa136d3..27592cc824 100644 --- a/ports/sysdeps/unix/sysv/linux/tile/nptl/clone.S +++ b/ports/sysdeps/unix/sysv/linux/tile/nptl/clone.S @@ -160,6 +160,8 @@ ENTRY (__clone) r32: the user function pointer */ .Lthread_start: + cfi_def_cfa_offset (FRAME_SIZE) + cfi_undefined (lr) /* Check and see if we need to reset the PID, which we do if CLONE_THREAD isn't set, i.e. we're not staying in the thread group. If CLONE_VM is set, we're doing some kind of thread-like clone, @@ -167,7 +169,6 @@ ENTRY (__clone) in getpid(). Otherwise (if CLONE_VM isn't set), it's a fork-like clone, and we go ahead and write the cached values from the true system pid (retrieved via __NR_getpid syscall). */ - cfi_def_cfa_offset (FRAME_SIZE) #ifdef __tilegx__ { moveli r0, hw1_last(CLONE_VM) |