http://sourceware.org/ml/gdb-patches/2013-03/msg00062.html Subject: [patch] entry-values: Fix if callee called noreturn function Hi, while debugging the previous bug I found this bug. THIS_PC found below is then passed to get_pc_function_start. get_pc_function_start cannot handle PC which has address of the end of the function. No regressions on {x86_64,x86_64-m32,i686}-fedora19pre-linux-gnu. I will check it in. Thanks, Jan gdb/ 2013-03-02 Jan Kratochvil Fix entry-values if the callee called a noreturn function. * dwarf2-frame-tailcall.c (dwarf2_tailcall_sniffer_first): Use get_frame_address_in_block. Add new comment. gdb/testsuite/ 2013-03-02 Jan Kratochvil Fix entry-values if the callee called a noreturn function. * gdb.arch/amd64-tailcall-noret.S: New file. * gdb.arch/amd64-tailcall-noret.c: New file. * gdb.arch/amd64-tailcall-noret.exp: New file. diff --git a/gdb/dwarf2-frame-tailcall.c b/gdb/dwarf2-frame-tailcall.c index b5f95c3..b82a051 100644 --- a/gdb/dwarf2-frame-tailcall.c +++ b/gdb/dwarf2-frame-tailcall.c @@ -374,7 +374,9 @@ dwarf2_tailcall_sniffer_first (struct frame_info *this_frame, gdb_assert (*tailcall_cachep == NULL); - this_pc = get_frame_pc (this_frame); + /* PC may be after the function if THIS_FRAME calls noreturn function, + get_frame_address_in_block will decrease it by 1 in such case. */ + this_pc = get_frame_address_in_block (this_frame); /* Catch any unwinding errors. */ TRY_CATCH (except, RETURN_MASK_ERROR) diff --git a/gdb/testsuite/gdb.arch/amd64-tailcall-noret.S b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.S new file mode 100644 index 0000000..25397e9 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.S @@ -0,0 +1,694 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright 2013 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +/* This source file was generated by: + gcc -o gdb.arch/amd64-tailcall-noret.S gdb.arch/amd64-tailcall-noret.c -Wall -S -dA -O2 -g + */ + + .file "amd64-tailcall-noret.c" + .text +.Ltext0: + .section .text.unlikely,"ax",@progbits + .type noret, @function +noret: +.LFB9: + .file 1 "gdb.arch/amd64-tailcall-noret.c" + # gdb.arch/amd64-tailcall-noret.c:24 + .loc 1 24 0 + .cfi_startproc +.LVL0: +# BLOCK 2 freq:10000 seq:0 +# PRED: ENTRY [100.0%] (fallthru) + pushq %rax +.LCFI0: + .cfi_def_cfa_offset 16 + # gdb.arch/amd64-tailcall-noret.c:25 + .loc 1 25 0 + call abort +.LVL1: +# SUCC: + .cfi_endproc +.LFE9: + .size noret, .-noret + .text + .p2align 4,,15 + .type mayret, @function +mayret: +.LFB10: + # gdb.arch/amd64-tailcall-noret.c:30 + .loc 1 30 0 + .cfi_startproc +.LVL2: +# BLOCK 2 freq:10000 seq:0 +# PRED: ENTRY [100.0%] (fallthru) + # gdb.arch/amd64-tailcall-noret.c:31 + .loc 1 31 0 + movl v(%rip), %eax + testl %eax, %eax +# SUCC: 4 [0.0%] (can_fallthru) 3 [100.0%] (fallthru,can_fallthru) + jne .L8 +# BLOCK 3 freq:9996 seq:1 +# PRED: 2 [100.0%] (fallthru,can_fallthru) +# SUCC: EXIT [100.0%] + rep + ret +# BLOCK 4 freq:4 seq:2 +# PRED: 2 [0.0%] (can_fallthru) +.L8: + # gdb.arch/amd64-tailcall-noret.c:30 + .loc 1 30 0 + pushq %rdx +.LCFI1: + .cfi_def_cfa_offset 16 + # gdb.arch/amd64-tailcall-noret.c:32 + .loc 1 32 0 + xorl %eax, %eax + call noret +.LVL3: +# SUCC: + .cfi_endproc +.LFE10: + .size mayret, .-mayret + .p2align 4,,15 + .type tailcall, @function +tailcall: +.LFB11: + # gdb.arch/amd64-tailcall-noret.c:37 + .loc 1 37 0 + .cfi_startproc +.LVL4: +# BLOCK 2 freq:10000 seq:0 +# PRED: ENTRY [100.0%] (fallthru) + # gdb.arch/amd64-tailcall-noret.c:38 + .loc 1 38 0 + jmp mayret +.LVL5: +# SUCC: EXIT [100.0%] (ab,sibcall) + .cfi_endproc +.LFE11: + .size tailcall, .-tailcall + .section .text.startup,"ax",@progbits + .p2align 4,,15 + .globl main + .type main, @function +main: +.LFB12: + # gdb.arch/amd64-tailcall-noret.c:43 + .loc 1 43 0 + .cfi_startproc +# BLOCK 2 freq:10000 seq:0 +# PRED: ENTRY [100.0%] (fallthru) + subq $8, %rsp +.LCFI2: + .cfi_def_cfa_offset 16 + # gdb.arch/amd64-tailcall-noret.c:44 + .loc 1 44 0 + movl $1, %edi + call tailcall +.LVL6: + # gdb.arch/amd64-tailcall-noret.c:46 + .loc 1 46 0 + xorl %eax, %eax + addq $8, %rsp +.LCFI3: + .cfi_def_cfa_offset 8 +# SUCC: EXIT [100.0%] + ret + .cfi_endproc +.LFE12: + .size main, .-main + .globl v + .data + .align 4 + .type v, @object + .size v, 4 +v: + .long 1 + .text +.Letext0: + .file 2 "/usr/include/stdlib.h" + .section .debug_info,"",@progbits +.Ldebug_info0: + .long 0x19d # Length of Compilation Unit Info + .value 0x2 # DWARF version number + .long .Ldebug_abbrev0 # Offset Into Abbrev. Section + .byte 0x8 # Pointer Size (in bytes) + .uleb128 0x1 # (DIE (0xb) DW_TAG_compile_unit) + .long .LASF14 # DW_AT_producer: "GNU C 4.7.3 20130221 (prerelease)" + .byte 0x1 # DW_AT_language + .long .LASF15 # DW_AT_name: "gdb.arch/amd64-tailcall-noret.c" + .long .LASF16 # DW_AT_comp_dir: "" + .long .Ldebug_ranges0+0 # DW_AT_ranges + .quad 0 # DW_AT_low_pc + .quad 0 # DW_AT_entry_pc + .long .Ldebug_line0 # DW_AT_stmt_list + .uleb128 0x2 # (DIE (0x31) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF0 # DW_AT_name: "long unsigned int" + .uleb128 0x3 # (DIE (0x38) DW_TAG_base_type) + .byte 0x4 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .ascii "int\0" # DW_AT_name + .uleb128 0x2 # (DIE (0x3f) DW_TAG_base_type) + .byte 0x1 # DW_AT_byte_size + .byte 0x8 # DW_AT_encoding + .long .LASF1 # DW_AT_name: "unsigned char" + .uleb128 0x2 # (DIE (0x46) DW_TAG_base_type) + .byte 0x2 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF2 # DW_AT_name: "short unsigned int" + .uleb128 0x2 # (DIE (0x4d) DW_TAG_base_type) + .byte 0x4 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF3 # DW_AT_name: "unsigned int" + .uleb128 0x2 # (DIE (0x54) DW_TAG_base_type) + .byte 0x1 # DW_AT_byte_size + .byte 0x6 # DW_AT_encoding + .long .LASF4 # DW_AT_name: "signed char" + .uleb128 0x2 # (DIE (0x5b) DW_TAG_base_type) + .byte 0x2 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .long .LASF5 # DW_AT_name: "short int" + .uleb128 0x2 # (DIE (0x62) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .long .LASF6 # DW_AT_name: "long int" + .uleb128 0x2 # (DIE (0x69) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF7 # DW_AT_name: "sizetype" + .uleb128 0x2 # (DIE (0x70) DW_TAG_base_type) + .byte 0x1 # DW_AT_byte_size + .byte 0x6 # DW_AT_encoding + .long .LASF8 # DW_AT_name: "char" + .uleb128 0x2 # (DIE (0x77) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x5 # DW_AT_encoding + .long .LASF9 # DW_AT_name: "long long int" + .uleb128 0x2 # (DIE (0x7e) DW_TAG_base_type) + .byte 0x8 # DW_AT_byte_size + .byte 0x7 # DW_AT_encoding + .long .LASF10 # DW_AT_name: "long long unsigned int" + .uleb128 0x4 # (DIE (0x85) DW_TAG_volatile_type) + .long 0x38 # DW_AT_type + .uleb128 0x5 # (DIE (0x8a) DW_TAG_subprogram) + .long .LASF11 # DW_AT_name: "noret" + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x17 # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .quad .LFB9 # DW_AT_low_pc + .quad .LFE9 # DW_AT_high_pc + .long .LLST0 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_call_sites + .long 0xc7 # DW_AT_sibling + .uleb128 0x6 # (DIE (0xab) DW_TAG_formal_parameter) + .ascii "x\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x17 # DW_AT_decl_line + .long 0x38 # DW_AT_type + .long .LLST1 # DW_AT_location + .uleb128 0x7 # (DIE (0xb8) DW_TAG_unspecified_parameters) + .uleb128 0x8 # (DIE (0xb9) DW_TAG_GNU_call_site) + .quad .LVL1 # DW_AT_low_pc + .long 0x195 # DW_AT_abstract_origin + .byte 0 # end of children of DIE 0x8a + .uleb128 0x5 # (DIE (0xc7) DW_TAG_subprogram) + .long .LASF12 # DW_AT_name: "mayret" + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x1d # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .quad .LFB10 # DW_AT_low_pc + .quad .LFE10 # DW_AT_high_pc + .long .LLST2 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_call_sites + .long 0x103 # DW_AT_sibling + .uleb128 0x6 # (DIE (0xe8) DW_TAG_formal_parameter) + .ascii "x\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x1d # DW_AT_decl_line + .long 0x38 # DW_AT_type + .long .LLST3 # DW_AT_location + .uleb128 0x8 # (DIE (0xf5) DW_TAG_GNU_call_site) + .quad .LVL3 # DW_AT_low_pc + .long 0x8a # DW_AT_abstract_origin + .byte 0 # end of children of DIE 0xc7 + .uleb128 0x9 # (DIE (0x103) DW_TAG_subprogram) + .long .LASF13 # DW_AT_name: "tailcall" + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x24 # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .quad .LFB11 # DW_AT_low_pc + .quad .LFE11 # DW_AT_high_pc + .byte 0x2 # DW_AT_frame_base + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .byte 0x1 # DW_AT_GNU_all_call_sites + .long 0x147 # DW_AT_sibling + .uleb128 0x6 # (DIE (0x123) DW_TAG_formal_parameter) + .ascii "x\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x24 # DW_AT_decl_line + .long 0x38 # DW_AT_type + .long .LLST4 # DW_AT_location + .uleb128 0xa # (DIE (0x130) DW_TAG_GNU_call_site) + .quad .LVL5 # DW_AT_low_pc + .byte 0x1 # DW_AT_GNU_tail_call + .long 0xc7 # DW_AT_abstract_origin + .uleb128 0xb # (DIE (0x13e) DW_TAG_GNU_call_site_parameter) + .byte 0x1 # DW_AT_location + .byte 0x55 # DW_OP_reg5 + .byte 0x3 # DW_AT_GNU_call_site_value + .byte 0xf3 # DW_OP_GNU_entry_value + .uleb128 0x1 + .byte 0x55 # DW_OP_reg5 + .byte 0 # end of children of DIE 0x130 + .byte 0 # end of children of DIE 0x103 + .uleb128 0xc # (DIE (0x147) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF17 # DW_AT_name: "main" + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x2a # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .long 0x38 # DW_AT_type + .quad .LFB12 # DW_AT_low_pc + .quad .LFE12 # DW_AT_high_pc + .long .LLST5 # DW_AT_frame_base + .byte 0x1 # DW_AT_GNU_all_call_sites + .long 0x181 # DW_AT_sibling + .uleb128 0xd # (DIE (0x16d) DW_TAG_GNU_call_site) + .quad .LVL6 # DW_AT_low_pc + .long 0x103 # DW_AT_abstract_origin + .uleb128 0xb # (DIE (0x17a) DW_TAG_GNU_call_site_parameter) + .byte 0x1 # DW_AT_location + .byte 0x55 # DW_OP_reg5 + .byte 0x1 # DW_AT_GNU_call_site_value + .byte 0x31 # DW_OP_lit1 + .byte 0 # end of children of DIE 0x16d + .byte 0 # end of children of DIE 0x147 + .uleb128 0xe # (DIE (0x181) DW_TAG_variable) + .ascii "v\0" # DW_AT_name + .byte 0x1 # DW_AT_decl_file (gdb.arch/amd64-tailcall-noret.c) + .byte 0x14 # DW_AT_decl_line + .long 0x85 # DW_AT_type + .byte 0x1 # DW_AT_external + .byte 0x9 # DW_AT_location + .byte 0x3 # DW_OP_addr + .quad v + .uleb128 0xf # (DIE (0x195) DW_TAG_subprogram) + .byte 0x1 # DW_AT_external + .long .LASF18 # DW_AT_name: "abort" + .byte 0x2 # DW_AT_decl_file (/usr/include/stdlib.h) + .value 0x202 # DW_AT_decl_line + .byte 0x1 # DW_AT_prototyped + .byte 0x1 # DW_AT_declaration + .byte 0 # end of children of DIE 0xb + .section .debug_abbrev,"",@progbits +.Ldebug_abbrev0: + .uleb128 0x1 # (abbrev code) + .uleb128 0x11 # (TAG: DW_TAG_compile_unit) + .byte 0x1 # DW_children_yes + .uleb128 0x25 # (DW_AT_producer) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x13 # (DW_AT_language) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x1b # (DW_AT_comp_dir) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x55 # (DW_AT_ranges) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x52 # (DW_AT_entry_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x10 # (DW_AT_stmt_list) + .uleb128 0x6 # (DW_FORM_data4) + .byte 0 + .byte 0 + .uleb128 0x2 # (abbrev code) + .uleb128 0x24 # (TAG: DW_TAG_base_type) + .byte 0 # DW_children_no + .uleb128 0xb # (DW_AT_byte_size) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3e # (DW_AT_encoding) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .byte 0 + .byte 0 + .uleb128 0x3 # (abbrev code) + .uleb128 0x24 # (TAG: DW_TAG_base_type) + .byte 0 # DW_children_no + .uleb128 0xb # (DW_AT_byte_size) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3e # (DW_AT_encoding) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3 # (DW_AT_name) + .uleb128 0x8 # (DW_FORM_string) + .byte 0 + .byte 0 + .uleb128 0x4 # (abbrev code) + .uleb128 0x35 # (TAG: DW_TAG_volatile_type) + .byte 0 # DW_children_no + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0x5 # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0x1 # DW_children_yes + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x3a # (DW_AT_decl_file) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3b # (DW_AT_decl_line) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x27 # (DW_AT_prototyped) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2117 # (DW_AT_GNU_all_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x1 # (DW_AT_sibling) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0x6 # (abbrev code) + .uleb128 0x5 # (TAG: DW_TAG_formal_parameter) + .byte 0 # DW_children_no + .uleb128 0x3 # (DW_AT_name) + .uleb128 0x8 # (DW_FORM_string) + .uleb128 0x3a # (DW_AT_decl_file) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3b # (DW_AT_decl_line) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .uleb128 0x2 # (DW_AT_location) + .uleb128 0x6 # (DW_FORM_data4) + .byte 0 + .byte 0 + .uleb128 0x7 # (abbrev code) + .uleb128 0x18 # (TAG: DW_TAG_unspecified_parameters) + .byte 0 # DW_children_no + .byte 0 + .byte 0 + .uleb128 0x8 # (abbrev code) + .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site) + .byte 0 # DW_children_no + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x31 # (DW_AT_abstract_origin) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0x9 # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0x1 # DW_children_yes + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x3a # (DW_AT_decl_file) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3b # (DW_AT_decl_line) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x27 # (DW_AT_prototyped) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0xa # (DW_FORM_block1) + .uleb128 0x2117 # (DW_AT_GNU_all_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x1 # (DW_AT_sibling) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0xa # (abbrev code) + .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site) + .byte 0x1 # DW_children_yes + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x2115 # (DW_AT_GNU_tail_call) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x31 # (DW_AT_abstract_origin) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0xb # (abbrev code) + .uleb128 0x410a # (TAG: DW_TAG_GNU_call_site_parameter) + .byte 0 # DW_children_no + .uleb128 0x2 # (DW_AT_location) + .uleb128 0xa # (DW_FORM_block1) + .uleb128 0x2111 # (DW_AT_GNU_call_site_value) + .uleb128 0xa # (DW_FORM_block1) + .byte 0 + .byte 0 + .uleb128 0xc # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0x1 # DW_children_yes + .uleb128 0x3f # (DW_AT_external) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x3a # (DW_AT_decl_file) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3b # (DW_AT_decl_line) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x27 # (DW_AT_prototyped) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x12 # (DW_AT_high_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x40 # (DW_AT_frame_base) + .uleb128 0x6 # (DW_FORM_data4) + .uleb128 0x2117 # (DW_AT_GNU_all_call_sites) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x1 # (DW_AT_sibling) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0xd # (abbrev code) + .uleb128 0x4109 # (TAG: DW_TAG_GNU_call_site) + .byte 0x1 # DW_children_yes + .uleb128 0x11 # (DW_AT_low_pc) + .uleb128 0x1 # (DW_FORM_addr) + .uleb128 0x31 # (DW_AT_abstract_origin) + .uleb128 0x13 # (DW_FORM_ref4) + .byte 0 + .byte 0 + .uleb128 0xe # (abbrev code) + .uleb128 0x34 # (TAG: DW_TAG_variable) + .byte 0 # DW_children_no + .uleb128 0x3 # (DW_AT_name) + .uleb128 0x8 # (DW_FORM_string) + .uleb128 0x3a # (DW_AT_decl_file) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3b # (DW_AT_decl_line) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x49 # (DW_AT_type) + .uleb128 0x13 # (DW_FORM_ref4) + .uleb128 0x3f # (DW_AT_external) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x2 # (DW_AT_location) + .uleb128 0xa # (DW_FORM_block1) + .byte 0 + .byte 0 + .uleb128 0xf # (abbrev code) + .uleb128 0x2e # (TAG: DW_TAG_subprogram) + .byte 0 # DW_children_no + .uleb128 0x3f # (DW_AT_external) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x3 # (DW_AT_name) + .uleb128 0xe # (DW_FORM_strp) + .uleb128 0x3a # (DW_AT_decl_file) + .uleb128 0xb # (DW_FORM_data1) + .uleb128 0x3b # (DW_AT_decl_line) + .uleb128 0x5 # (DW_FORM_data2) + .uleb128 0x27 # (DW_AT_prototyped) + .uleb128 0xc # (DW_FORM_flag) + .uleb128 0x3c # (DW_AT_declaration) + .uleb128 0xc # (DW_FORM_flag) + .byte 0 + .byte 0 + .byte 0 + .section .debug_loc,"",@progbits +.Ldebug_loc0: +.LLST0: + .quad .LFB9 # Location list begin address (*.LLST0) + .quad .LCFI0 # Location list end address (*.LLST0) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI0 # Location list begin address (*.LLST0) + .quad .LFE9 # Location list end address (*.LLST0) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad 0 # Location list terminator begin (*.LLST0) + .quad 0 # Location list terminator end (*.LLST0) +.LLST1: + .quad .LVL0 # Location list begin address (*.LLST1) + .quad .LVL1-1 # Location list end address (*.LLST1) + .value 0x1 # Location expression size + .byte 0x55 # DW_OP_reg5 + .quad .LVL1-1 # Location list begin address (*.LLST1) + .quad .LFE9 # Location list end address (*.LLST1) + .value 0x4 # Location expression size + .byte 0xf3 # DW_OP_GNU_entry_value + .uleb128 0x1 + .byte 0x55 # DW_OP_reg5 + .byte 0x9f # DW_OP_stack_value + .quad 0 # Location list terminator begin (*.LLST1) + .quad 0 # Location list terminator end (*.LLST1) +.LLST2: + .quad .LFB10 # Location list begin address (*.LLST2) + .quad .LCFI1 # Location list end address (*.LLST2) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI1 # Location list begin address (*.LLST2) + .quad .LFE10 # Location list end address (*.LLST2) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad 0 # Location list terminator begin (*.LLST2) + .quad 0 # Location list terminator end (*.LLST2) +.LLST3: + .quad .LVL2 # Location list begin address (*.LLST3) + .quad .LVL3-1 # Location list end address (*.LLST3) + .value 0x1 # Location expression size + .byte 0x55 # DW_OP_reg5 + .quad .LVL3-1 # Location list begin address (*.LLST3) + .quad .LFE10 # Location list end address (*.LLST3) + .value 0x4 # Location expression size + .byte 0xf3 # DW_OP_GNU_entry_value + .uleb128 0x1 + .byte 0x55 # DW_OP_reg5 + .byte 0x9f # DW_OP_stack_value + .quad 0 # Location list terminator begin (*.LLST3) + .quad 0 # Location list terminator end (*.LLST3) +.LLST4: + .quad .LVL4 # Location list begin address (*.LLST4) + .quad .LVL5-1 # Location list end address (*.LLST4) + .value 0x1 # Location expression size + .byte 0x55 # DW_OP_reg5 + .quad .LVL5-1 # Location list begin address (*.LLST4) + .quad .LFE11 # Location list end address (*.LLST4) + .value 0x4 # Location expression size + .byte 0xf3 # DW_OP_GNU_entry_value + .uleb128 0x1 + .byte 0x55 # DW_OP_reg5 + .byte 0x9f # DW_OP_stack_value + .quad 0 # Location list terminator begin (*.LLST4) + .quad 0 # Location list terminator end (*.LLST4) +.LLST5: + .quad .LFB12 # Location list begin address (*.LLST5) + .quad .LCFI2 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad .LCFI2 # Location list begin address (*.LLST5) + .quad .LCFI3 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 16 + .quad .LCFI3 # Location list begin address (*.LLST5) + .quad .LFE12 # Location list end address (*.LLST5) + .value 0x2 # Location expression size + .byte 0x77 # DW_OP_breg7 + .sleb128 8 + .quad 0 # Location list terminator begin (*.LLST5) + .quad 0 # Location list terminator end (*.LLST5) + .section .debug_aranges,"",@progbits + .long 0x4c # Length of Address Ranges Info + .value 0x2 # DWARF Version + .long .Ldebug_info0 # Offset of Compilation Unit Info + .byte 0x8 # Size of Address + .byte 0 # Size of Segment Descriptor + .value 0 # Pad to 16 byte boundary + .value 0 + .quad .Ltext0 # Address + .quad .Letext0-.Ltext0 # Length + .quad .LFB9 # Address + .quad .LFE9-.LFB9 # Length + .quad .LFB12 # Address + .quad .LFE12-.LFB12 # Length + .quad 0 + .quad 0 + .section .debug_ranges,"",@progbits +.Ldebug_ranges0: + .quad .Ltext0 # Offset 0 + .quad .Letext0 + .quad .LFB9 # Offset 0x10 + .quad .LFE9 + .quad .LFB12 # Offset 0x20 + .quad .LFE12 + .quad 0 + .quad 0 + .section .debug_line,"",@progbits +.Ldebug_line0: + .section .debug_str,"MS",@progbits,1 +.LASF9: + .string "long long int" +.LASF14: + .string "GNU C 4.7.3 20130221 (prerelease)" +.LASF3: + .string "unsigned int" +.LASF17: + .string "main" +.LASF0: + .string "long unsigned int" +.LASF10: + .string "long long unsigned int" +.LASF16: + .string "" +.LASF13: + .string "tailcall" +.LASF1: + .string "unsigned char" +.LASF8: + .string "char" +.LASF6: + .string "long int" +.LASF11: + .string "noret" +.LASF2: + .string "short unsigned int" +.LASF4: + .string "signed char" +.LASF12: + .string "mayret" +.LASF18: + .string "abort" +.LASF5: + .string "short int" +.LASF7: + .string "sizetype" +.LASF15: + .string "gdb.arch/amd64-tailcall-noret.c" + .ident "GCC: (GNU) 4.7.3 20130221 (prerelease)" + .section .note.GNU-stack,"",@progbits diff --git a/gdb/testsuite/gdb.arch/amd64-tailcall-noret.c b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.c new file mode 100644 index 0000000..6a84c76 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.c @@ -0,0 +1,46 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright 2013 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#include + +volatile int v = 1; + +static __attribute__ ((noinline, noclone, noreturn)) void +noret (int x, ...) +{ + abort (); +} + +static __attribute__ ((noinline, noclone)) void +mayret (int x) +{ + if (v) + noret (x); +} + +static __attribute__ ((noinline, noclone)) void +tailcall (int x) +{ + mayret (x); +} + +int +main (void) +{ + tailcall (1); + return 0; +} diff --git a/gdb/testsuite/gdb.arch/amd64-tailcall-noret.exp b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.exp new file mode 100644 index 0000000..cd15596 --- /dev/null +++ b/gdb/testsuite/gdb.arch/amd64-tailcall-noret.exp @@ -0,0 +1,36 @@ +# Copyright (C) 2012-2013 Free Software Foundation, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +set opts {} +standard_testfile .S + +if [info exists COMPILE] { + # make check RUNTESTFLAGS="gdb.arch/amd64-tailcall-noret.exp COMPILE=1" + standard_testfile + lappend opts debug optimize=-O2 +} elseif { ![istarget x86_64-*-* ] || ![is_lp64_target] } { + verbose "Skipping ${testfile}." + return +} + +if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } { + return -1 +} + +if ![runto noret] { + return -1 +} + +gdb_test "bt" "#0 +noret \\(x=1\\) at \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in mayret \\(x=x@entry=1\\) at \[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in tailcall \\(x=x@entry=1\\) at \[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in main \\(\\) at .*"