Commit 06bf2e048b

kcbanner <kcbanner@gmail.com>
2023-07-13 00:41:53
tests: use a more portable way of determining the return address in the test code
master
1 parent b180313
Changed files (2)
test
standalone
dwarf_unwinding
shared_lib.c
shared_lib_unwind.zig
test/standalone/dwarf_unwinding/shared_lib.c
@@ -8,17 +8,15 @@ __attribute__((noinline)) void frame1(
     void** expected,
     void** unwound,
     void (*frame2)(void** expected, void** unwound)) {
-    expected[2] = &&frame_2_ret;
+    expected[3] = __builtin_extract_return_addr(__builtin_return_address(0));
     frame2(expected, unwound);
- frame_2_ret:
 }
 
 LIB_API void frame0(
     void** expected,
     void** unwound,
     void (*frame2)(void** expected, void** unwound)) {
-    expected[3] = &&frame_1_ret;
+    expected[4] = __builtin_extract_return_addr(__builtin_return_address(0));
     frame1(expected, unwound, frame2);
- frame_1_ret:
 }
test/standalone/dwarf_unwinding/shared_lib_unwind.zig
@@ -2,7 +2,7 @@ const std = @import("std");
 const debug = std.debug;
 const testing = std.testing;
 
-noinline fn frame4(expected: *[4]usize, unwound: *[4]usize) void {
+noinline fn frame4(expected: *[5]usize, unwound: *[5]usize) void {
     expected[0] = @returnAddress();
 
     var context: debug.ThreadContext = undefined;
@@ -17,26 +17,27 @@ noinline fn frame4(expected: *[4]usize, unwound: *[4]usize) void {
     }
 }
 
-noinline fn frame3(expected: *[4]usize, unwound: *[4]usize) void {
+noinline fn frame3(expected: *[5]usize, unwound: *[5]usize) void {
     expected[1] = @returnAddress();
     frame4(expected, unwound);
 }
 
-fn frame2(expected: *[4]usize, unwound: *[4]usize) callconv(.C) void {
+fn frame2(expected: *[5]usize, unwound: *[5]usize) callconv(.C) void {
+    expected[2] = @returnAddress();
     frame3(expected, unwound);
 }
 
 extern fn frame0(
-    expected: *[4]usize,
-    unwound: *[4]usize,
-    frame_2: *const fn (expected: *[4]usize, unwound: *[4]usize) callconv(.C) void,
+    expected: *[5]usize,
+    unwound: *[5]usize,
+    frame_2: *const fn (expected: *[5]usize, unwound: *[5]usize) callconv(.C) void,
 ) void;
 
 pub fn main() !void {
     if (!std.debug.have_ucontext or !std.debug.have_getcontext) return;
 
-    var expected: [4]usize = undefined;
-    var unwound: [4]usize = undefined;
+    var expected: [5]usize = undefined;
+    var unwound: [5]usize = undefined;
     frame0(&expected, &unwound, &frame2);
     try testing.expectEqual(expected, unwound);
 }