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std.debug.printSourceAtAddressDwarf

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which works in freestanding mode
This commit is contained in:
Andrew Kelley 2018-12-02 19:34:11 -05:00
parent 4292ed9571
commit a436d2ab8c
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GPG Key ID: 7C5F548F728501A9
1 changed files with 43 additions and 11 deletions
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54
std/debug/index.zig
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@ -411,7 +411,7 @@ fn printSourceAtAddressWindows(di: *DebugInfo, out_stream: var, relocated_addres
if (opt_line_info) |line_info| { if (opt_line_info) |line_info| {
try out_stream.print("\n"); try out_stream.print("\n");
if (printLineFromFile(out_stream, line_info)) { if (printLineFromFileAnyOs(out_stream, line_info)) {
if (line_info.column == 0) { if (line_info.column == 0) {
try out_stream.write("\n"); try out_stream.write("\n");
} else { } else {
@ -595,7 +595,16 @@ fn printSourceAtAddressMacOs(di: *DebugInfo, out_stream: var, address: usize, tt
} else "???"; } else "???";
if (getLineNumberInfoMacOs(di, symbol.*, adjusted_addr)) |line_info| { if (getLineNumberInfoMacOs(di, symbol.*, adjusted_addr)) |line_info| {
defer line_info.deinit(); defer line_info.deinit();
try printLineInfo(di, out_stream, line_info, address, symbol_name, compile_unit_name, tty_color); try printLineInfo(
di,
out_stream,
line_info,
address,
symbol_name,
compile_unit_name,
tty_color,
printLineFromFileAnyOs,
);
} else |err| switch (err) { } else |err| switch (err) {
error.MissingDebugInfo, error.InvalidDebugInfo => { error.MissingDebugInfo, error.InvalidDebugInfo => {
if (tty_color) { if (tty_color) {
@ -608,7 +617,15 @@ fn printSourceAtAddressMacOs(di: *DebugInfo, out_stream: var, address: usize, tt
} }
} }
pub fn printSourceAtAddressLinux(debug_info: *DebugInfo, out_stream: var, address: usize, tty_color: bool) !void { /// This function works in freestanding mode.
/// fn printLineFromFile(out_stream: var, line_info: LineInfo) !void
pub fn printSourceAtAddressDwarf(
debug_info: *DebugInfo,
out_stream: var,
address: usize,
tty_color: bool,
comptime printLineFromFile: var,
) !void {
const compile_unit = findCompileUnit(debug_info, address) catch { const compile_unit = findCompileUnit(debug_info, address) catch {
if (tty_color) { if (tty_color) {
try out_stream.print("???:?:?: " ++ DIM ++ "0x{x} in ??? (???)" ++ RESET ++ "\n\n\n", address); try out_stream.print("???:?:?: " ++ DIM ++ "0x{x} in ??? (???)" ++ RESET ++ "\n\n\n", address);
@ -618,10 +635,19 @@ pub fn printSourceAtAddressLinux(debug_info: *DebugInfo, out_stream: var, addres
return; return;
}; };
const compile_unit_name = try compile_unit.die.getAttrString(debug_info, DW.AT_name); const compile_unit_name = try compile_unit.die.getAttrString(debug_info, DW.AT_name);
if (getLineNumberInfoLinux(debug_info, compile_unit, address - 1)) |line_info| { if (getLineNumberInfoDwarf(debug_info, compile_unit.*, address - 1)) |line_info| {
defer line_info.deinit(); defer line_info.deinit();
const symbol_name = "???"; const symbol_name = "???";
try printLineInfo(debug_info, out_stream, line_info, address, symbol_name, compile_unit_name, tty_color); try printLineInfo(
debug_info,
out_stream,
line_info,
address,
symbol_name,
compile_unit_name,
tty_color,
printLineFromFile,
);
} else |err| switch (err) { } else |err| switch (err) {
error.MissingDebugInfo, error.InvalidDebugInfo => { error.MissingDebugInfo, error.InvalidDebugInfo => {
if (tty_color) { if (tty_color) {
@ -634,6 +660,10 @@ pub fn printSourceAtAddressLinux(debug_info: *DebugInfo, out_stream: var, addres
} }
} }
pub fn printSourceAtAddressLinux(debug_info: *DebugInfo, out_stream: var, address: usize, tty_color: bool) !void {
return printSourceAtAddressDwarf(debug_info, out_stream, address, tty_color, printLineFromFileAnyOs);
}
fn printLineInfo( fn printLineInfo(
debug_info: *DebugInfo, debug_info: *DebugInfo,
out_stream: var, out_stream: var,
@ -642,6 +672,7 @@ fn printLineInfo(
symbol_name: []const u8, symbol_name: []const u8,
compile_unit_name: []const u8, compile_unit_name: []const u8,
tty_color: bool, tty_color: bool,
comptime printLineFromFile: var,
) !void { ) !void {
if (tty_color) { if (tty_color) {
try out_stream.print( try out_stream.print(
@ -1020,7 +1051,7 @@ fn openSelfDebugInfoMacOs(allocator: *mem.Allocator) !DebugInfo {
}; };
} }
fn printLineFromFile(out_stream: var, line_info: LineInfo) !void { fn printLineFromFileAnyOs(out_stream: var, line_info: LineInfo) !void {
var f = try os.File.openRead(line_info.file_name); var f = try os.File.openRead(line_info.file_name);
defer f.close(); defer f.close();
// TODO fstat and make sure that the file has the correct size // TODO fstat and make sure that the file has the correct size
@ -1247,11 +1278,12 @@ const FileEntry = struct {
const LineInfo = struct { const LineInfo = struct {
line: usize, line: usize,
column: usize, column: usize,
file_name: []u8, file_name: []const u8,
allocator: *mem.Allocator, allocator: ?*mem.Allocator,
fn deinit(self: *const LineInfo) void { fn deinit(self: LineInfo) void {
self.allocator.free(self.file_name); const allocator = self.allocator orelse return;
allocator.free(self.file_name);
} }
}; };
@ -1707,7 +1739,7 @@ fn getLineNumberInfoMacOs(di: *DebugInfo, symbol: MachoSymbol, target_address: u
return error.MissingDebugInfo; return error.MissingDebugInfo;
} }
fn getLineNumberInfoLinux(di: *DebugInfo, compile_unit: *const CompileUnit, target_address: usize) !LineInfo { fn getLineNumberInfoDwarf(di: *DebugInfo, compile_unit: CompileUnit, target_address: usize) !LineInfo {
const compile_unit_cwd = try compile_unit.die.getAttrString(di, DW.AT_comp_dir); const compile_unit_cwd = try compile_unit.die.getAttrString(di, DW.AT_comp_dir);
const debug_line_end = di.debug_line.offset + di.debug_line.size; const debug_line_end = di.debug_line.offset + di.debug_line.size;