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Fix gdb.mi/mi-stack.exp when gcc generates a stack protector 

I see some failures in the gdb.mi/mi-stack.exp test.  The test runs to
the callee4 function:

  int callee4 (void)
  {
    int A=1;
    int B=2;
    int C;
    int D[3] = {0, 1, 2};

    C = A + B;
    return 0;
  }

and expects to be stopped at the A=1 line.  However, when gcc generates
some stack protection code, it will stop at the { instead, as shown by
this disassembly (after I did "break callee4" and "run"):

  (gdb) disassemble /s
  Dump of assembler code for function callee4:
  /home/simark/src/binutils-gdb/gdb/testsuite/gdb.mi/mi-stack.c:
  26	{
     0x00005555555546ca <+0>:	push   %rbp
     0x00005555555546cb <+1>:	mov    %rsp,%rbp
     0x00005555555546ce <+4>:	sub    $0x20,%rsp
  => 0x00005555555546d2 <+8>:	mov    %fs:0x28,%rax
     0x00005555555546db <+17>:	mov    %rax,-0x8(%rbp)
     0x00005555555546df <+21>:	xor    %eax,%eax

  27	  int A=1; /* callee4 begin */
     0x00005555555546e1 <+23>:	movl   $0x1,-0x20(%rbp)

  28	  int B=2;
     0x00005555555546e8 <+30>:	movl   $0x2,-0x1c(%rbp)

The rest of the test relies on execution stopping on the A=1, so many things
fail after that.  This patch uses mi_continue_to_line instead, to stop at the
A=1 line precisely.

gdb/testsuite/ChangeLog:

	* gdb.mi/mi-stack.exp (test_stack_frame_listing): Use
	mi_continue_to_line.
	* gdb.mi/mi-stack.c (callee4): Add comment.
This commit is contained in:
Simon Marchi 2018-04-07 14:08:56 -04:00
parent 9b73db3673
commit a0be7a3671
3 changed files with 11 additions and 5 deletions
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6
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,9 @@
2018-04-07 Simon Marchi <simon.marchi@polymtl.ca>
* gdb.mi/mi-stack.exp (test_stack_frame_listing): Use
mi_continue_to_line.
* gdb.mi/mi-stack.c (callee4): Add comment.
2018-04-07 Simon Marchi <simon.marchi@polymtl.ca>
* gdb.mi/mi-stack.exp: Fix indentation.

2
gdb/testsuite/gdb.mi/mi-stack.c
View File

@ -24,7 +24,7 @@
int callee4 (void)
{
int A=1;
int A=1; /* callee4 begin */
int B=2;
int C;
int D[3] = {0, 1, 2};

8
gdb/testsuite/gdb.mi/mi-stack.exp
View File

@ -46,8 +46,8 @@ proc test_stack_frame_listing {} {
global mi_gdb_prompt
global hex fullname_syntax srcfile
set line_callee4_head [gdb_get_line_number "callee4 ("]
set line_callee4_body [expr $line_callee4_head + 2]
set callee4_begin [gdb_get_line_number "callee4 begin"]
mi_continue_to_line $callee4_begin "continue to callee4 begin"
# Obtain a stack trace
# Tests:
@ -56,7 +56,7 @@ proc test_stack_frame_listing {} {
# -stack-list-frames 1 3
# -stack-info-frame
mi_gdb_test "231-stack-list-frames" \
"231\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"callee4\",file=\".*${srcfile}\",fullname=\"${fullname_syntax}${srcfile}\",line=\"$line_callee4_body\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"callee3\",.*\},frame=\{level=\"2\",addr=\"$hex\",func=\"callee2\",.*\},frame=\{level=\"3\",addr=\"$hex\",func=\"callee1\",.*\},frame=\{level=\"4\",addr=\"$hex\",func=\"main\",.*\}\\\]" \
"231\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"callee4\",file=\".*${srcfile}\",fullname=\"${fullname_syntax}${srcfile}\",line=\"$callee4_begin\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"callee3\",.*\},frame=\{level=\"2\",addr=\"$hex\",func=\"callee2\",.*\},frame=\{level=\"3\",addr=\"$hex\",func=\"callee1\",.*\},frame=\{level=\"4\",addr=\"$hex\",func=\"main\",.*\}\\\]" \
"stack frame listing"
mi_gdb_test "232-stack-list-frames 1 1" \
"232\\^done,stack=\\\[frame=\{level=\"1\",addr=\"$hex\",func=\"callee3\",.*\}\\\]" \
@ -70,7 +70,7 @@ proc test_stack_frame_listing {} {
"stack frame listing wrong"
mi_gdb_test "235-stack-info-frame" \
"235\\^done,frame=\{level=\"0\",addr=\"$hex\",func=\"callee4\",file=\".*${srcfile}\",fullname=\"${fullname_syntax}${srcfile}\",line=\"$line_callee4_body\"\}" \
"235\\^done,frame=\{level=\"0\",addr=\"$hex\",func=\"callee4\",file=\".*${srcfile}\",fullname=\"${fullname_syntax}${srcfile}\",line=\"$callee4_begin\"\}" \
"selected frame listing"
mi_gdb_test "236-stack-list-frames 1 300" \