jarin updated this revision to Diff 375886.
jarin added a comment.
Added a C test (I have also verified that the C test fails without the
SymbolFileDWARF patch).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D110571/new/
https://reviews.llvm.org/D110571
Files:
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
lldb/test/API/functionalities/unused-inlined-parameters/Makefile
lldb/test/API/functionalities/unused-inlined-parameters/TestUnusedInlinedParameters.py
lldb/test/API/functionalities/unused-inlined-parameters/main.c
lldb/test/Shell/SymbolFile/DWARF/x86/Inputs/unused-inlined-params.s
lldb/test/Shell/SymbolFile/DWARF/x86/unused-inlined-params.test
Index: lldb/test/Shell/SymbolFile/DWARF/x86/unused-inlined-params.test
===================================================================
--- /dev/null
+++ lldb/test/Shell/SymbolFile/DWARF/x86/unused-inlined-params.test
@@ -0,0 +1,69 @@
+# UNSUPPORTED: system-darwin, system-windows
+
+# REQUIRES: lld
+
+# RUN: llvm-mc -filetype=obj %S/Inputs/unused-inlined-params.s \
+# RUN: -triple x86_64-pc-linux -o %t.o
+# RUN: ld.lld %t.o -o %t
+# RUN: %lldb %t -s %s -o exit | FileCheck %s
+
+
+# In this test we verify that inlined functions still mention
+# all their parameters in `frame variable`, even when those
+# parameters were completely optimized away from the concrete
+# instance of the inlined function in the debug info.
+# The debugger should look up the parameters in the abstract
+# origin of the concrete instance.
+
+breakpoint set -n main
+process launch
+# CHECK: Process {{.*}} stopped
+
+# Let us check that unused parameters of an inlined function are listed
+# at the inlined function entry.
+breakpoint set -n break_at_inlined_f_in_main
+continue
+frame variable
+# CHECK-LABEL: frame variable
+# CHECK: (void *) unused1 = <
+# CHECK: (int) used = 42
+# CHECK: (int) unused2 = <
+# CHECK: (int) partial = 1
+# CHECK: (int) unused3 = <
+
+# Step out of the live range of the 'partial' parameter and verify that
+# all variables are still displayed.
+breakpoint set -n break_at_inlined_f_in_main_between_printfs
+continue
+frame variable
+# CHECK-LABEL: frame variable
+# CHECK: (void *) unused1 = <
+# CHECK: (int) used = 43
+# CHECK: (int) unused2 = <
+# CHECK: (int) partial = <
+# CHECK: (int) unused3 = <
+
+# Check that we show parameters even if all of them are compiled away.
+breakpoint set -n break_at_inlined_g_in_main
+continue
+frame variable
+# CHECK-LABEL: frame variable
+# CHECK: (int) unused = <
+
+# Check that even the other inlined instance of f displays correct
+# parameters.
+breakpoint set -n break_at_inlined_f_in_other
+continue
+frame variable
+# CHECK-LABEL: frame variable
+# CHECK: (void *) unused1 = <
+# CHECK: (int) used = 1
+# CHECK: (int) unused2 = <
+# CHECK: (int) partial = 2
+# CHECK: (int) unused3 = <
+
+# Check that the stack trace contains the inlined function with
+# all the arguments
+thread backtrace
+CHECK: other [inlined] f(unused1=<unavailable>, used=1, unused2=<unavailable>, \
+partial=2, unused3=<unavailable>)
\ No newline at end of file
Index: lldb/test/Shell/SymbolFile/DWARF/x86/Inputs/unused-inlined-params.s
===================================================================
--- /dev/null
+++ lldb/test/Shell/SymbolFile/DWARF/x86/Inputs/unused-inlined-params.s
@@ -0,0 +1,458 @@
+# The below program is roughly derived from the following C program.
+# To see the annotated debug info, look for the section
+# '.section .debug_info' below.
+#
+# __attribute__((always_inline))
+# void f(void* unused1, int used, int unused2, int partial, int unused3) {
+# used += partial;
+# printf("f %i", partial);
+# printf("f %i", used); // |partial| is not live at this line.
+# }
+#
+# void g(int unused) {
+# printf("Hello");
+# }
+#
+# __attribute__((noinline))
+# void other() {
+# f(nullptr, 1, 0, 2, 0);
+# }
+#
+# int main(int argc, char** argv) {
+# f(argv, 42, 1, argc, 2);
+# g(1);
+# other();
+# return 0;
+# }
+
+ .text
+ .file "unused-inlined-params.c"
+
+.Lcu_begin:
+
+ .globl other
+other:
+ nop
+.Linlined_f_in_other:
+break_at_inlined_f_in_other:
+ callq printf # Omitted the setup of arguments.
+.Linlined_f_in_other_between_printfs:
+ callq printf # Omitted the setup of arguments.
+.Linlined_f_in_other_end:
+ retq
+.Lother_end:
+ .size other, .Lother_end-other
+
+ .globl main
+main:
+ .file 1 "/example" "unused-inlined-params.c"
+ movl $1, %esi
+.Linlined_f:
+break_at_inlined_f_in_main:
+ leal 42(%rsi), %ebx
+.Linlined_f_before_printf:
+ callq printf # Omitted the setup of arguments.
+.Linlined_f_between_printfs:
+break_at_inlined_f_in_main_between_printfs:
+ callq printf # Omitted the setup of arguments.
+.Linlined_f_end:
+.Linlined_g:
+break_at_inlined_g_in_main:
+ callq printf # Omitted the setup of arguments.
+.Linlined_g_end:
+ callq other
+ retq
+.Lmain_end:
+ .size main, .Lmain_end-main
+
+# Dummy printf implementation.
+printf:
+ retq
+
+# Simple entry point to make the linker happy.
+ .globl _start
+_start:
+ jmp main
+
+.Lcu_end:
+
+
+ .section .debug_loc,"",@progbits
+.Ldebug_loc_partial:
+ .quad .Linlined_f-.Lcu_begin
+ .quad .Linlined_f_between_printfs-.Lcu_begin
+ .short 1 # Loc expr size
+ .byte 84 # super-register DW_OP_reg4
+ .quad 0
+ .quad 0
+.Ldebug_loc_used:
+ .quad .Linlined_f-.Lcu_begin
+ .quad .Linlined_f_before_printf-.Lcu_begin
+ .short 3 # Loc expr size
+ .byte 17 # DW_OP_consts
+ .byte 42 # value
+ .byte 159 # DW_OP_stack_value
+ .quad .Linlined_f_before_printf-.Lcu_begin
+ .quad .Linlined_f_end-.Lcu_begin
+ .short 1 # Loc expr size
+ .byte 83 # super-register DW_OP_reg3
+ .quad 0
+ .quad 0
+.Ldebug_loc_partial_in_other:
+ .quad .Linlined_f_in_other-.Lcu_begin
+ .quad .Linlined_f_in_other_between_printfs-.Lcu_begin
+ .short 3 # Loc expr size
+ .byte 17 # DW_OP_consts
+ .byte 2 # value
+ .byte 159 # DW_OP_stack_value
+ .quad 0
+ .quad 0
+.Ldebug_loc_used_in_other:
+ .quad .Linlined_f_in_other-.Lcu_begin
+ .quad .Linlined_f_in_other_end-.Lcu_begin
+ .short 3 # Loc expr size
+ .byte 17 # DW_OP_consts
+ .byte 1 # value
+ .byte 159 # DW_OP_stack_value
+ .quad 0
+ .quad 0
+
+ .section .debug_abbrev,"",@progbits
+ .byte 1 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 3 # DW_AT_name
+ .byte 14 # DW_FORM_strp
+ .byte 16 # DW_AT_stmt_list
+ .byte 23 # DW_FORM_sec_offset
+ .byte 17 # DW_AT_low_pc
+ .byte 1 # DW_FORM_addr
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 4 # Abbreviation Code
+ .byte 5 # DW_TAG_formal_parameter
+ .byte 0 # DW_CHILDREN_no
+ .byte 2 # DW_AT_location
+ .byte 23 # DW_FORM_sec_offset
+ .byte 49 # DW_AT_abstract_origin
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 5 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 3 # DW_AT_name
+ .byte 14 # DW_FORM_strp
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 39 # DW_AT_prototyped
+ .byte 25 # DW_FORM_flag_present
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 32 # DW_AT_inline
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 6 # Abbreviation Code
+ .byte 5 # DW_TAG_formal_parameter
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 14 # DW_FORM_strp
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 7 # Abbreviation Code
+ .byte 15 # DW_TAG_pointer_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 8 # Abbreviation Code
+ .byte 36 # DW_TAG_base_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 14 # DW_FORM_strp
+ .byte 62 # DW_AT_encoding
+ .byte 11 # DW_FORM_data1
+ .byte 11 # DW_AT_byte_size
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 9 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 17 # DW_AT_low_pc
+ .byte 1 # DW_FORM_addr
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 64 # DW_AT_frame_base
+ .byte 24 # DW_FORM_exprloc
+ .byte 3 # DW_AT_name
+ .byte 14 # DW_FORM_strp
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 39 # DW_AT_prototyped
+ .byte 25 # DW_FORM_flag_present
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 10 # Abbreviation Code
+ .byte 5 # DW_TAG_formal_parameter
+ .byte 0 # DW_CHILDREN_no
+ .byte 2 # DW_AT_location
+ .byte 23 # DW_FORM_sec_offset
+ .byte 3 # DW_AT_name
+ .byte 14 # DW_FORM_strp
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 11 # Abbreviation Code
+ .byte 29 # DW_TAG_inlined_subroutine
+ .byte 1 # DW_CHILDREN_yes
+ .byte 49 # DW_AT_abstract_origin
+ .byte 19 # DW_FORM_ref4
+ .byte 17 # DW_AT_low_pc
+ .byte 1 # DW_FORM_addr
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 88 # DW_AT_call_file
+ .byte 11 # DW_FORM_data1
+ .byte 89 # DW_AT_call_line
+ .byte 11 # DW_FORM_data1
+ .byte 87 # DW_AT_call_column
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+
+ .byte 12 # Abbreviation Code
+ .byte 15 # DW_TAG_pointer_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+
+ .section .debug_info,"",@progbits
+.Ldi_cu_begin:
+ .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+ .short 4 # DWARF version number
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .byte 8 # Address Size (in bytes)
+ .byte 1 # Abbrev [1] DW_TAG_compile_unit
+ .long .Linfo_string_fname # DW_AT_name
+ .long .Lline_table_start0 # DW_AT_stmt_list
+ .quad .Lcu_begin # DW_AT_low_pc
+ .long .Lcu_end-.Lcu_begin # DW_AT_high_pc
+
+# Debug info for |f| (abstract version with all parameters).
+
+.Ldebug_info_f:
+ .byte 5 # Abbrev [5] DW_TAG_subprogram
+ .long .Linfo_string_f # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ # DW_AT_prototyped
+ # DW_AT_external
+ .byte 1 # DW_AT_inline
+.Ldebug_info_param1:
+ .byte 6 # Abbrev [6] DW_TAG_formal_parameter
+ .long .Linfo_string_unused1 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ .long .Ldebug_info_void_ptr-.Ldi_cu_begin
+ # DW_AT_type
+.Ldebug_info_param2:
+ .byte 6 # Abbrev [6] DW_TAG_formal_parameter
+ .long .Linfo_string_used # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ .long .Ldebug_info_int-.Ldi_cu_begin # DW_AT_type
+.Ldebug_info_param3:
+ .byte 6 # Abbrev [6] DW_TAG_formal_parameter
+ .long .Linfo_string_unused2 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ .long .Ldebug_info_int-.Ldi_cu_begin # DW_AT_type
+.Ldebug_info_param4:
+ .byte 6 # Abbrev [6] DW_TAG_formal_parameter
+ .long .Linfo_string_partial # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ .long .Ldebug_info_int-.Ldi_cu_begin # DW_AT_type
+.Ldebug_info_param5:
+ .byte 6 # Abbrev [6] DW_TAG_formal_parameter
+ .long .Linfo_string_unused3 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ .long .Ldebug_info_int-.Ldi_cu_begin # DW_AT_type
+ .byte 0 # End Of Children Mark (DW_TAG_subprogram)
+
+# Debug info for |g| (abstract version with all parameters).
+
+.Ldebug_info_g:
+ .byte 5 # Abbrev [5] DW_TAG_subprogram
+ .long .Linfo_string_g # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 4 # DW_AT_decl_line
+ # DW_AT_prototyped
+ # DW_AT_external
+ .byte 1 # DW_AT_inline
+.Ldebug_info_g_param1:
+ .byte 6 # Abbrev [6] DW_TAG_formal_parameter
+ .long .Linfo_string_unused # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 10 # DW_AT_decl_line
+ .long .Ldebug_info_int-.Ldi_cu_begin
+ .byte 0 # End Of Children Mark (DW_TAG_subprogram)
+
+# Debug info for |main|.
+
+ .byte 9 # Abbrev [9] DW_TAG_subprogram
+ .quad main # DW_AT_low_pc
+ .long .Lmain_end-main # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 87
+ .long .Linfo_string_main # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 18 # DW_AT_decl_line
+ # DW_AT_prototyped
+ .long .Ldebug_info_int-.Ldi_cu_begin # DW_AT_type
+ # DW_AT_external
+
+# Debug info for concrete |f| inlined into |main|.
+
+ .byte 11 # Abbrev [11] DW_TAG_inlined_subroutine
+ .long .Ldebug_info_f-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .quad .Linlined_f # DW_AT_low_pc
+ .long .Linlined_f_end-.Linlined_f # DW_AT_high_pc
+ .byte 1 # DW_AT_call_file
+ .byte 20 # DW_AT_call_line
+ .byte 3 # DW_AT_call_column
+ .byte 4 # Abbrev [4] DW_TAG_formal_parameter
+ .long .Ldebug_loc_used # DW_AT_location
+ .long .Ldebug_info_param2-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .byte 4 # Abbrev [4] DW_TAG_formal_parameter
+ .long .Ldebug_loc_partial # DW_AT_location
+ .long .Ldebug_info_param4-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .byte 0 # End Of Children Mark (DW_TAG_inlined_subroutine)
+
+# Debug info for concrete |g| inlined into |main|.
+
+ .byte 11 # Abbrev [11] DW_TAG_inlined_subroutine
+ .long .Ldebug_info_g-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .quad .Linlined_g # DW_AT_low_pc
+ .long .Linlined_g_end-.Linlined_g # DW_AT_high_pc
+ .byte 1 # DW_AT_call_file
+ .byte 21 # DW_AT_call_line
+ .byte 3 # DW_AT_call_column
+ .byte 0 # End Of Children Mark (DW_TAG_inlined_subroutine)
+
+ .byte 0 # End Of Children Mark (DW_TAG_subprogram)
+
+# Debug info for |other|.
+
+ .byte 9 # Abbrev [9] DW_TAG_subprogram
+ .quad other # DW_AT_low_pc
+ .long .Lother_end-other # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 87
+ .long .Linfo_string_other # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 15 # DW_AT_decl_line
+ # DW_AT_prototyped
+ .long .Ldebug_info_int-.Ldi_cu_begin # DW_AT_type
+ # DW_AT_external
+
+# Debug info for concrete |f| inlined into |other|.
+
+ .byte 11 # Abbrev [11] DW_TAG_inlined_subroutine
+ .long .Ldebug_info_f-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .quad .Linlined_f_in_other # DW_AT_low_pc
+ .long .Linlined_f_in_other_end-.Linlined_f_in_other
+ # DW_AT_high_pc
+ .byte 1 # DW_AT_call_file
+ .byte 16 # DW_AT_call_line
+ .byte 3 # DW_AT_call_column
+ .byte 4 # Abbrev [4] DW_TAG_formal_parameter
+ .long .Ldebug_loc_used_in_other # DW_AT_location
+ .long .Ldebug_info_param2-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .byte 4 # Abbrev [4] DW_TAG_formal_parameter
+ .long .Ldebug_loc_partial_in_other # DW_AT_location
+ .long .Ldebug_info_param4-.Ldi_cu_begin
+ # DW_AT_abstract_origin
+ .byte 0 # End Of Children Mark (DW_TAG_inlined_subroutine)
+ .byte 0 # End Of Children Mark (DW_TAG_subprogram)
+
+.Ldebug_info_void_ptr:
+ .byte 7 # Abbrev [7] DW_TAG_pointer_type
+.Ldebug_info_int:
+ .byte 8 # Abbrev [8] DW_TAG_base_type
+ .long .Linfo_string_int # DW_AT_name
+ .byte 5 # DW_AT_encoding
+ .byte 4 # DW_AT_byte_size
+
+ .byte 0 # End Of Children Mark (DW_TAG_compile_unit)
+.Ldebug_info_end0:
+ .section .debug_str,"MS",@progbits,1
+.Linfo_string_fname:
+ .asciz "unused-inlined-params.c"
+.Linfo_string_f:
+ .asciz "f"
+.Linfo_string_unused1:
+ .asciz "unused1"
+.Linfo_string_used:
+ .asciz "used"
+.Linfo_string_int:
+ .asciz "int"
+.Linfo_string_unused2:
+ .asciz "unused2"
+.Linfo_string_partial:
+ .asciz "partial"
+.Linfo_string_unused3:
+ .asciz "unused3"
+.Linfo_string_main:
+ .asciz "main"
+.Linfo_string_g:
+ .asciz "g"
+.Linfo_string_unused:
+ .asciz "unused"
+.Linfo_string_other:
+ .asciz "other"
+ .section ".note.GNU-stack","",@progbits
+ .addrsig
+ .section .debug_line,"",@progbits
+.Lline_table_start0:
Index: lldb/test/API/functionalities/unused-inlined-parameters/main.c
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/unused-inlined-parameters/main.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+__attribute__((always_inline))
+void f(void* unused1, int used, int unused2) {
+ printf("f %i", used); // break here
+}
+
+int main(int argc, char** argv) {
+ f(argv, 42, 1);
+ return 0;
+}
Index: lldb/test/API/functionalities/unused-inlined-parameters/TestUnusedInlinedParameters.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/unused-inlined-parameters/TestUnusedInlinedParameters.py
@@ -0,0 +1,20 @@
+"""
+Test that unused inlined parameters are displayed.
+"""
+
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestUnusedInlinedParameters(TestBase):
+ mydir = TestBase.compute_mydir(__file__)
+
+ def test_unused_inlined_parameters(self):
+ self.build()
+ lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.c"))
+
+ # For the unused parameters, only check the types.
+ self.assertEqual("void *", self.frame().FindVariable("unused1").GetType().GetName())
+ self.assertEqual(42, self.frame().FindVariable("used").GetValueAsUnsigned())
+ self.assertEqual("int", self.frame().FindVariable("unused2").GetType().GetName())
Index: lldb/test/API/functionalities/unused-inlined-parameters/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/unused-inlined-parameters/Makefile
@@ -0,0 +1,4 @@
+C_SOURCES := main.c
+CFLAGS_EXTRAS := -O1
+
+include Makefile.rules
Index: lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
+++ lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
@@ -389,10 +389,11 @@
const DWARFDIE &die,
const lldb::addr_t func_low_pc);
+ using DIEVector = llvm::SmallVector<DWARFDIE, 2>;
size_t ParseVariablesInFunctionContextRecursive(
const lldb_private::SymbolContext &sc, const DWARFDIE &die,
- const lldb::addr_t func_low_pc,
- lldb_private::VariableList &variable_list);
+ const lldb::addr_t func_low_pc, lldb_private::VariableList &variable_list,
+ DIEVector &abstract_formal_parameters, size_t &abstract_parameter_index);
bool ClassOrStructIsVirtual(const DWARFDIE &die);
Index: lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -3498,7 +3498,9 @@
return;
}
- // We haven't already parsed it, lets do that now.
+ // We haven't parsed the variable yet, lets do that now. Also, let us include
+ // the variable in the relevant compilation unit's variable list, if it
+ // exists.
VariableListSP variable_list_sp;
DWARFDIE sc_parent_die = GetParentSymbolContextDIE(die);
dw_tag_t parent_tag = sc_parent_die.Tag();
@@ -3544,16 +3546,46 @@
sc.function->GetBlock(/*can_create=*/true).FindBlockByID(die.GetID());
const bool can_create = false;
VariableListSP variable_list_sp = block->GetBlockVariableList(can_create);
- return ParseVariablesInFunctionContextRecursive(sc, die, func_low_pc,
- *variable_list_sp);
+ DIEVector abstract_formal_parameters;
+ size_t abstract_parameter_index = 0;
+ return ParseVariablesInFunctionContextRecursive(
+ sc, die, func_low_pc, *variable_list_sp, abstract_formal_parameters,
+ abstract_parameter_index);
}
size_t SymbolFileDWARF::ParseVariablesInFunctionContextRecursive(
const lldb_private::SymbolContext &sc, const DWARFDIE &die,
- const lldb::addr_t func_low_pc, VariableList &variable_list) {
+ const lldb::addr_t func_low_pc, VariableList &variable_list,
+ DIEVector &abstract_formal_parameters, size_t &abstract_parameter_index) {
size_t vars_added = 0;
dw_tag_t tag = die.Tag();
+ // If we are parsing a formal parameter, let us make sure that we insert
+ // preceding abstract parameters if they were omitted from the concrete
+ // function instance.
+ if (tag == DW_TAG_formal_parameter) {
+ while (abstract_parameter_index < abstract_formal_parameters.size()) {
+ const DWARFDIE &abstract_parameter =
+ abstract_formal_parameters[abstract_parameter_index++];
+ DWARFDIE parameter = die;
+ bool found = false;
+ while (parameter) {
+ parameter = parameter.GetReferencedDIE(DW_AT_abstract_origin);
+ if (parameter == abstract_parameter) {
+ found = true;
+ break;
+ }
+ }
+ if (found)
+ break;
+ VariableSP var_sp(ParseVariableDIE(sc, abstract_parameter, func_low_pc));
+ if (var_sp) {
+ variable_list.AddVariableIfUnique(var_sp);
+ ++vars_added;
+ }
+ }
+ }
+
if ((tag == DW_TAG_variable) || (tag == DW_TAG_constant) ||
(tag == DW_TAG_formal_parameter)) {
VariableSP var_sp(ParseVariableDIE(sc, die, func_low_pc));
@@ -3592,10 +3624,43 @@
block_variable_list_sp = std::make_shared<VariableList>();
block->SetVariableList(block_variable_list_sp);
}
+
+ DIEVector block_abstract_formal_parameters;
+ if (tag == DW_TAG_inlined_subroutine) {
+ // Walk abstract origins until we find DW_TAG_subprogram and extract
+ // its formal parameters.
+ DWARFDIE abs_die = die;
+ while (abs_die && abs_die.Tag() != DW_TAG_subprogram) {
+ abs_die = abs_die.GetReferencedDIE(DW_AT_abstract_origin);
+ }
+ if (abs_die && abs_die.HasChildren()) {
+ for (DWARFDIE child = abs_die.GetFirstChild(); child;
+ child = child.GetSibling()) {
+ if (child.Tag() == DW_TAG_formal_parameter) {
+ block_abstract_formal_parameters.push_back(child);
+ }
+ }
+ }
+ }
+
+ size_t block_parameter_index = 0;
for (DWARFDIE child = die.GetFirstChild(); child;
child = child.GetSibling()) {
vars_added += ParseVariablesInFunctionContextRecursive(
- sc, child, func_low_pc, *block_variable_list_sp);
+ sc, child, func_low_pc, *block_variable_list_sp,
+ block_abstract_formal_parameters, block_parameter_index);
+ }
+
+ // If there any remaining abstract formal parameters, parse and insert
+ // them as well.
+ while (block_parameter_index < block_abstract_formal_parameters.size()) {
+ const DWARFDIE &abstract_parameter =
+ block_abstract_formal_parameters[block_parameter_index++];
+ VariableSP var_sp(ParseVariableDIE(sc, abstract_parameter, func_low_pc));
+ if (var_sp) {
+ block_variable_list_sp->AddVariableIfUnique(var_sp);
+ ++vars_added;
+ }
}
break;
@@ -3606,7 +3671,8 @@
for (DWARFDIE child = die.GetFirstChild(); child;
child = child.GetSibling()) {
vars_added += ParseVariablesInFunctionContextRecursive(
- sc, child, func_low_pc, variable_list);
+ sc, child, func_low_pc, variable_list, abstract_formal_parameters,
+ abstract_parameter_index);
}
break;
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