asan-help: pretty print ASAN_OPTIONS

ASAN_OPTIONS=help=1 is not supported by GCC 4.9, but I want to know its
supported features anyway. Manually copy the names from gcc-4.9-20150204
and print the help text with names highlighted.

1 files changed, 104 insertions, 0 deletions

diff --git a/asan-help b/asan-help
new file mode 100755
index 0000000..9032018
--- /dev/null
+++ b/asan-help
@@ -0,0 +1,104 @@
+#!/bin/bash
+# Displays supported ASAN options
+
+# gcc 4.9.2 does not support ASAN_OPTIONS=help=1
+# It was merged to gcc at 2014-05-22
+# https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=7d752f28b590bbad13c877c2aa7f5f8de2cdff10
+: ${CC:=clang}
+gcc_ver=$("$CC" --version | awk 'NR==1 && $1=="gcc" { print $3 }')
+if [[ $gcc_ver == 4.9.* ]]; then
+    CC=clang
+fi
+
+# Colors for keywords
+CON=$(tput bold; tput setaf 3)
+COFF=$(tput sgr0)
+
+gcc_4_9_sanitizer_common="
+allocator_may_return_null
+detect_leaks
+external_symbolizer_path
+fast_unwind_on_fatal
+fast_unwind_on_malloc
+handle_ioctl
+leak_check_at_exit
+log_path
+malloc_context_size
+print_summary
+strip_path_prefix
+symbolize
+verbosity
+"
+
+gcc_4_9_asan_opts="
+$gcc_4_9_sanitizer_common
+abort_on_error
+alloc_dealloc_mismatch
+allow_reexec
+allow_user_poisoning
+allow_user_segv_handler
+atexit
+check_initialization_order
+check_malloc_usable_size
+coverage
+debug
+detect_stack_use_after_return
+disable_core
+exitcode
+handle_segv
+mac_ignore_invalid_free
+malloc_fill_byte
+max_malloc_fill_size
+poison_heap
+poison_partial
+print_full_thread_history
+print_legend
+print_stats
+quarantine_size
+redzone
+replace_intrin
+replace_str
+report_globals
+sleep_before_dying
+strict_init_order
+strict_memcmp
+uar_stack_size_log
+unmap_shadow_on_exit
+use_sigaltstack
+"
+
+tmp=$(mktemp)
+trap 'rm "$tmp"' EXIT
+echo 'int main(void){ return 0; }' | $CC -fsanitize=address -x c - -o "$tmp"
+
+ASAN_OPTIONS=help=1 "$tmp" 2>&1 |
+gawk -vgcc_4_9_asan_opts="$gcc_4_9_asan_opts" -vgcc_ver="$gcc_ver" '
+BEGIN {
+    n = split(gcc_4_9_asan_opts, gcc49_opts_);
+    split("", gcc49_opts);
+    for (i = 1; i <= n; i++) {
+        gcc49_opts[gcc49_opts_[i]] = 1;
+    }
+
+    split("", desc);
+}
+/^\t[^\t]/ {
+    name = $1;
+}
+/^\t\t- / {
+    desc[name] = $0;
+}
+END {
+    asorti(desc, desc_indices);
+    for (i in desc_indices) {
+        word = desc_indices[i];
+        suffix = "";
+        if (!gcc49_opts[word]) {
+            suffix = " [!gcc49]";
+        }
+        print "\t" word suffix;
+        print desc[word];
+    }
+}
+' | sed -r "s/^(\\t)([a-z0-9_]+)/\\1${CON}\\2${COFF}/"
+