Changeset 2fbb42f in mainline for kernel/meson.build

Timestamp:

2023-10-26T19:20:09Z (21 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, topic/msim-upgrade, topic/simplify-dev-export

Children:

001957b6

Parents:

da13982

Message:

Add printing of file names and line numbers in stacktraces

Uses DWARF ¾/5 .debug_line section (originally intended
to only support DWARF 5, but GCC emits lower versioned sections
regardless of command line arguments on some platforms for some
reason, so generic support it is).

Also adds a whole lot of definitions for various DWARF constants
I expect to be useful in the future.

The quickest way to test this probably is to run test fault1
in kernel console.

File:

• kernel/meson.build (modified) (2 diffs)

kernel/meson.build

@@ -95 +95 @@
 kernel_c_args = arch_kernel_c_args + kernel_defs + [
         '-ffreestanding',
+        '-fdebug-prefix-map=../../kernel/=',
+        '-fdebug-prefix-map=../../../kernel/=',
 
         cc.get_supported_arguments([
@@ -112 +114 @@
 ]
 
+if not CONFIG_LINE_DEBUG
+        # Keep the debug info needed to get file names for kernel stack traces.
+        kernel_c_args += [ '-gdwarf-5', '-g1', '-gno-statement-frontiers' ]
+endif
+
 if CONFIG_LTO
         kernel_c_args += [ '-flto' ]