make-core.sh: add FreeBSD support

[emaste]

Output on FreeBSD, with the patch:

% sh make-core.sh main.c
+ file=main.c
+ [ -z main.c ]
+ [ FreeBSD '=' Linux ]
+ ulimit -c 1000
+ ulimit -c
+ real_limit=1000
+ [ 1000 -lt 100 ]
+ cc -nostdlib -static -g main.c -o a.out
+ cat
Executable file is in a.out.
Core file will be saved according to pattern %N.core.
+ ulimit -s 8
+ exec ./a.out
zsh: segmentation fault (core dumped)  sh make-core.sh main.c

[labath]

Nice.

lldb/trunk/packages/Python/lldbsuite/test/functionalities/postmortem/linux-core/make-core.sh

-#! /bin/bash
+#! /bin/sh
+
+linux_check_core_pattern()
+{
+    if grep -q '^|' </proc/sys/kernel/core_pattern; then
+        cat <<EOF
+Your system uses a crash report tool ($(cat /proc/sys/kernel/core_pattern)). Core files
+will not be generated.  Please reset /proc/sys/kernel/core_pattern (requires root
+privileges) to enable core generation.
+EOF
+        exit 1
+    fi
+}
+
+OS=$(uname -s)
+case "$OS" in
+FreeBSD)
+    core_pattern=$(sysctl -n kern.corefile)
+    ;;
+Linux)
+    core_pattern=$(cat /proc/sys/kernel/core_pattern)
+    ;;
+*)
+    echo "OS $OS not supported" >&2
+    exit 1
+    ;;
+esac
 
 set -e -x
 
 file=$1
 if [ -z "$file" ]; then
     cat <<EOF
 Please supply the main source file as the first argument.
 EOF
     exit 1
 fi
 
-if grep -q '^|' </proc/sys/kernel/core_pattern; then
-    cat <<EOF
-Your system uses a crash report tool ($(cat /proc/sys/kernel/core_pattern)). Core files
-will not be generated.  Please reset /proc/sys/kernel/core_pattern (requires root
-privileges) to enable core generation.
-EOF
-    exit 1
+if [ "$OS" = Linux ]; then
+    linux_check_core_pattern
 fi
 
 ulimit -c 1000
 real_limit=$(ulimit -c)
 if [ $real_limit -lt 100 ]; then
     cat <<EOF
 Unable to increase the core file limit. Core file may be truncated!
 To fix this, increase HARD core file limit (ulimit -H -c 1000). This may require root
 privileges.
 EOF
 fi
 
 ${CC:-cc} -nostdlib -static -g $CFLAGS "$file" -o a.out
 
 cat <<EOF
 Executable file is in a.out.
-Core file will be saved according to pattern $(cat /proc/sys/kernel/core_pattern).
+Core file will be saved according to pattern $core_pattern.
 EOF
 
 ulimit -s 8 # Decrease stack size to 8k => smaller core files.
 exec ./a.out