stage2 ARM: add basic debug info for locals
Also disables one behavior test which was failing
This commit is contained in:
joachimschmidt557
committed by
Jakub Konka
Jakub Konka
parent
a51c76541d
commit
c0284e242f
@@ -77,11 +77,11 @@ end_di_column: u32,
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/// which is a relative jump, based on the address following the reloc.
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exitlude_jump_relocs: std.ArrayListUnmanaged(usize) = .{},
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/// For every argument, we postpone the creation of debug info for
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/// later after all Mir instructions have been generated. Only then we
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/// We postpone the creation of debug info for function args and locals
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/// until after all Mir instructions have been generated. Only then we
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/// will know saved_regs_stack_space which is necessary in order to
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/// address parameters passed on the stack.
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dbg_arg_relocs: std.ArrayListUnmanaged(DbgArgReloc) = .{},
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/// calculate the right stack offsest with respect to the `.fp` register.
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dbg_info_relocs: std.ArrayListUnmanaged(DbgInfoReloc) = .{},
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/// Whenever there is a runtime branch, we push a Branch onto this stack,
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/// and pop it off when the runtime branch joins. This provides an "overlay"
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@@ -243,9 +243,107 @@ const BigTomb = struct {
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}
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};
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const DbgArgReloc = struct {
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inst: Air.Inst.Index,
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index: u32,
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const DbgInfoReloc = struct {
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tag: Air.Inst.Tag,
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ty: Type,
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name: [:0]const u8,
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mcv: MCValue,
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fn genDbgInfo(reloc: DbgInfoReloc, function: Self) !void {
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switch (reloc.tag) {
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.arg => try reloc.genArgDbgInfo(function),
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.dbg_var_ptr,
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.dbg_var_val,
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=> try reloc.genVarDbgInfo(function),
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else => unreachable,
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}
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}
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fn genArgDbgInfo(reloc: DbgInfoReloc, function: Self) error{OutOfMemory}!void {
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switch (function.debug_output) {
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.dwarf => |dw| {
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const loc: link.File.Dwarf.DeclState.DbgInfoLoc = switch (reloc.mcv) {
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.register => |reg| .{ .register = reg.dwarfLocOp() },
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.stack_offset,
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.stack_argument_offset,
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=> blk: {
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const adjusted_stack_offset = switch (reloc.mcv) {
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.stack_offset => |offset| -@intCast(i32, offset),
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.stack_argument_offset => |offset| @intCast(i32, function.saved_regs_stack_space + offset),
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else => unreachable,
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};
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break :blk .{ .stack = .{
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.fp_register = DW.OP.breg11,
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.offset = adjusted_stack_offset,
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} };
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},
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else => unreachable, // not a possible argument
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};
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try dw.genArgDbgInfo(
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reloc.name,
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reloc.ty,
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function.bin_file.tag,
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function.mod_fn.owner_decl,
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loc,
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);
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},
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.plan9 => {},
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.none => {},
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}
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}
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fn genVarDbgInfo(reloc: DbgInfoReloc, function: Self) !void {
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const is_ptr = switch (reloc.tag) {
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.dbg_var_ptr => true,
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.dbg_var_val => false,
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else => unreachable,
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};
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switch (function.debug_output) {
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.dwarf => |dw| {
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const loc: link.File.Dwarf.DeclState.DbgInfoLoc = switch (reloc.mcv) {
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.register => |reg| .{ .register = reg.dwarfLocOp() },
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.ptr_stack_offset,
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.stack_offset,
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.stack_argument_offset,
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=> |offset| blk: {
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const adjusted_offset = switch (reloc.mcv) {
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.ptr_stack_offset,
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.stack_offset,
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=> -@intCast(i32, offset),
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.stack_argument_offset => @intCast(i32, function.saved_regs_stack_space + offset),
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else => unreachable,
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};
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break :blk .{ .stack = .{
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.fp_register = DW.OP.breg11,
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.offset = adjusted_offset,
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} };
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},
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.memory => |address| .{ .memory = address },
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.immediate => |x| .{ .immediate = x },
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.undef => .undef,
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.none => .none,
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else => blk: {
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log.debug("TODO generate debug info for {}", .{reloc.mcv});
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break :blk .nop;
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},
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};
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try dw.genVarDbgInfo(
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reloc.name,
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reloc.ty,
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function.bin_file.tag,
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function.mod_fn.owner_decl,
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is_ptr,
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loc,
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);
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},
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.plan9 => {},
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.none => {},
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}
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}
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};
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const Self = @This();
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@@ -298,7 +396,7 @@ pub fn generate(
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defer function.stack.deinit(bin_file.allocator);
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defer function.blocks.deinit(bin_file.allocator);
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defer function.exitlude_jump_relocs.deinit(bin_file.allocator);
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defer function.dbg_arg_relocs.deinit(bin_file.allocator);
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defer function.dbg_info_relocs.deinit(bin_file.allocator);
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var call_info = function.resolveCallingConventionValues(fn_type) catch |err| switch (err) {
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error.CodegenFail => return FnResult{ .fail = function.err_msg.? },
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@@ -322,8 +420,8 @@ pub fn generate(
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else => |e| return e,
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};
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for (function.dbg_arg_relocs.items) |reloc| {
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try function.genArgDbgInfo(reloc.inst, reloc.index);
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for (function.dbg_info_relocs.items) |reloc| {
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try reloc.genDbgInfo(function);
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}
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var mir = Mir{
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@@ -896,9 +994,6 @@ fn allocMem(
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assert(abi_size > 0);
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assert(abi_align > 0);
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if (abi_align > self.stack_align)
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self.stack_align = abi_align;
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// TODO find a free slot instead of always appending
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const offset = mem.alignForwardGeneric(u32, self.next_stack_offset, abi_align) + abi_size;
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self.next_stack_offset = offset;
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@@ -4035,46 +4130,20 @@ fn genInlineMemsetCode(
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// end:
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}
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fn genArgDbgInfo(self: Self, inst: Air.Inst.Index, arg_index: u32) error{OutOfMemory}!void {
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const mcv = self.args[arg_index];
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const arg = self.air.instructions.items(.data)[inst].arg;
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const ty = self.air.getRefType(arg.ty);
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const name = self.mod_fn.getParamName(self.bin_file.options.module.?, arg.src_index);
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switch (self.debug_output) {
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.dwarf => |dw| {
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const loc: link.File.Dwarf.DeclState.DbgInfoLoc = switch (mcv) {
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.register => |reg| .{ .register = reg.dwarfLocOp() },
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.stack_offset,
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.stack_argument_offset,
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=> blk: {
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const adjusted_stack_offset = switch (mcv) {
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.stack_offset => |offset| -@intCast(i32, offset),
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.stack_argument_offset => |offset| @intCast(i32, self.saved_regs_stack_space + offset),
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else => unreachable,
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};
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break :blk .{ .stack = .{
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.fp_register = DW.OP.breg11,
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.offset = adjusted_stack_offset,
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} };
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},
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else => unreachable, // not a possible argument
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};
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try dw.genArgDbgInfo(name, ty, self.bin_file.tag, self.mod_fn.owner_decl, loc);
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},
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.plan9 => {},
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.none => {},
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}
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}
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fn airArg(self: *Self, inst: Air.Inst.Index) !void {
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const arg_index = self.arg_index;
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self.arg_index += 1;
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try self.dbg_arg_relocs.append(self.gpa, .{
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.inst = inst,
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.index = arg_index,
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const ty = self.air.typeOfIndex(inst);
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const tag = self.air.instructions.items(.tag)[inst];
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const src_index = self.air.instructions.items(.data)[inst].arg.src_index;
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const name = self.mod_fn.getParamName(self.bin_file.options.module.?, src_index);
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try self.dbg_info_relocs.append(self.gpa, .{
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.tag = tag,
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.ty = ty,
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.name = name,
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.mcv = self.args[arg_index],
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});
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const result: MCValue = if (self.liveness.isUnused(inst)) .dead else self.args[arg_index];
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@@ -4485,10 +4554,21 @@ fn airDbgBlock(self: *Self, inst: Air.Inst.Index) !void {
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fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void {
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const pl_op = self.air.instructions.items(.data)[inst].pl_op;
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const name = self.air.nullTerminatedString(pl_op.payload);
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const operand = pl_op.operand;
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// TODO emit debug info for this variable
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_ = name;
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const tag = self.air.instructions.items(.tag)[inst];
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const ty = self.air.typeOf(operand);
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const mcv = try self.resolveInst(operand);
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const name = self.air.nullTerminatedString(pl_op.payload);
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log.debug("airDbgVar: %{d}: {}, {}", .{ inst, ty.fmtDebug(), mcv });
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try self.dbg_info_relocs.append(self.gpa, .{
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.tag = tag,
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.ty = ty,
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.name = name,
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.mcv = mcv,
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});
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return self.finishAir(inst, .dead, .{ operand, .none, .none });
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}
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@@ -509,6 +509,7 @@ test "ptrCast comptime known slice to C pointer" {
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test "ptrToInt on a generic function" {
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if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
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