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481b7bf3f0
Functions like isMinGW() and isGnuLibC() have a good reason to exist: They look at multiple components of the target. But functions like isWasm(), isDarwin(), isGnu(), etc only exist to save 4-8 characters. I don't think this is a good enough reason to keep them, especially given that: * It's not immediately obvious to a reader whether target.isDarwin() means the same thing as target.os.tag.isDarwin() precisely because isMinGW() and similar functions *do* look at multiple components. * It's not clear where we would draw the line. The logical conclusion before this commit would be to also wrap Arch.isX86(), Os.Tag.isSolarish(), Abi.isOpenHarmony(), etc... this obviously quickly gets out of hand. * It's nice to just have a single correct way of doing something.
49 lines
1.7 KiB
Zig
49 lines
1.7 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const debug = std.debug;
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const testing = std.testing;
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noinline fn frame4(expected: *[5]usize, unwound: *[5]usize) void {
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expected[0] = @returnAddress();
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var context: debug.ThreadContext = undefined;
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testing.expect(debug.getContext(&context)) catch @panic("failed to getContext");
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const debug_info = debug.getSelfDebugInfo() catch @panic("failed to openSelfDebugInfo");
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var it = debug.StackIterator.initWithContext(expected[0], debug_info, &context) catch @panic("failed to initWithContext");
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defer it.deinit();
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for (unwound) |*addr| {
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if (it.next()) |return_address| addr.* = return_address;
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}
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}
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noinline fn frame3(expected: *[5]usize, unwound: *[5]usize) void {
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expected[1] = @returnAddress();
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frame4(expected, unwound);
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}
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fn frame2(expected: *[5]usize, unwound: *[5]usize) callconv(.C) void {
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expected[2] = @returnAddress();
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frame3(expected, unwound);
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}
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extern fn frame0(
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expected: *[5]usize,
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unwound: *[5]usize,
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frame_2: *const fn (expected: *[5]usize, unwound: *[5]usize) callconv(.C) void,
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) void;
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pub fn main() !void {
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// Disabled until the DWARF unwinder bugs on .aarch64 are solved
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if (builtin.omit_frame_pointer and comptime builtin.target.os.tag.isDarwin() and builtin.cpu.arch == .aarch64) return;
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if (builtin.target.os.tag.isDarwin() and builtin.cpu.arch == .x86_64) return; // https://github.com/ziglang/zig/issues/21337
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if (!std.debug.have_ucontext or !std.debug.have_getcontext) return;
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var expected: [5]usize = undefined;
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var unwound: [5]usize = undefined;
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frame0(&expected, &unwound, &frame2);
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try testing.expectEqual(expected, unwound);
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}
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