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Diffstat (limited to 'lib/std/debug/cpu_context.zig')
| -rw-r--r-- | lib/std/debug/cpu_context.zig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/std/debug/cpu_context.zig b/lib/std/debug/cpu_context.zig index 3450debba0..5dd2e283ed 100644 --- a/lib/std/debug/cpu_context.zig +++ b/lib/std/debug/cpu_context.zig @@ -870,6 +870,8 @@ const Sparc = extern struct { pub const Gpr = if (native_arch == .sparc64) u64 else u32; pub inline fn current() Sparc { + flushWindows(); + var ctx: Sparc = undefined; asm volatile (if (Gpr == u64) \\ stx %g0, [%l0 + 0] @@ -933,6 +935,15 @@ const Sparc = extern struct { return ctx; } + noinline fn flushWindows() void { + // Flush all register windows except the current one (hence `noinline`). This ensures that + // we actually see meaningful data on the stack when we walk the frame chain. + if (comptime builtin.target.cpu.has(.sparc, .v9)) + asm volatile ("flushw" ::: .{ .memory = true }) + else + asm volatile ("ta 3" ::: .{ .memory = true }); // ST_FLUSH_WINDOWS + } + pub fn dwarfRegisterBytes(ctx: *Sparc, register_num: u16) DwarfRegisterError![]u8 { switch (register_num) { 0...7 => return @ptrCast(&ctx.g[register_num]), |