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* [Bug gdb/18328] New: gdb does not work properly with gcov to update statement coverage
@ 2015-04-25 4:06 pgmer6809 at yahoo dot com
2024-01-02 18:53 ` [Bug gdb/18328] " ssbssa at sourceware dot org
0 siblings, 1 reply; 2+ messages in thread
From: pgmer6809 at yahoo dot com @ 2015-04-25 4:06 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=18328
Bug ID: 18328
Summary: gdb does not work properly with gcov to update
statement coverage
Product: gdb
Version: 7.7
Status: NEW
Severity: minor
Priority: P2
Component: gdb
Assignee: unassigned at sourceware dot org
Reporter: pgmer6809 at yahoo dot com
Created attachment 8267
--> https://sourceware.org/bugzilla/attachment.cgi?id=8267&action=edit
Showing complete version info for linux, gdb, gcc, gcov, compile flags and
code snippet:
array[x] = (int *) malloc (arraysize*sizeof (int));
if (array[x] == NULL) {
;
printf("Failed malloc for array size %d \n", arraysize);
exit(-1);
}
The executable program is sample
before the test the relevant lines in sample.c.gcov look like this:
-: 36: }
101: 37: for (x=0; x < arraysize; x++) {
100: 38: array[x] = (int *) malloc (arraysize*sizeof (int));
100: 39: if (array[x] == NULL) {
-: 40: ;
#####: 41: printf("Failed malloc for array size %d \n", arraysize);
#####: 42: exit(-1);
-: 43: }
then:
gdb sample
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation,
.
<snip>
.
Type "apropos word" to search for commands related to "word"...
Reading symbols from sample...done.
(gdb) break 19
Breakpoint 1 at 0x400edd: file sample.c, line 19.
(gdb) run
Starting program: /home/greg/Programming/C_Code/sample
Breakpoint 1, main (argc=1, argv=0x7fffffffe168) at sample.c:19
19 if (argc != 2) {
(gdb) jump 40
Continuing at 0x40107a.
Failed malloc for array size 0
[Inferior 1 (process 7384) exited with code 0377]
(gdb) quit
Now an examination of sample.c.gcov yields
101: 37: for (x=0; x < arraysize; x++) {
100: 38: array[x] = (int *) malloc (arraysize*sizeof (int));
100: 39: if (array[x] == NULL) {
-: 40: ;
#####: 41: printf("Failed malloc for array size %d \n", arraysize);
1: 42: exit(-1);
-: 43: }
Note that line 42's count has been updated but line 41's still shows that it
was never executed.
This looks like a bug in gdb or in gcov I am not sure which.
This is my first real try at using gdb, and so I am totally inexperienced with
it.
Greg Morse -- pgmer6809
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* [Bug gdb/18328] gdb does not work properly with gcov to update statement coverage
2015-04-25 4:06 [Bug gdb/18328] New: gdb does not work properly with gcov to update statement coverage pgmer6809 at yahoo dot com
@ 2024-01-02 18:53 ` ssbssa at sourceware dot org
0 siblings, 0 replies; 2+ messages in thread
From: ssbssa at sourceware dot org @ 2024-01-02 18:53 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=18328
Hannes Domani <ssbssa at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ssbssa at sourceware dot org
--- Comment #1 from Hannes Domani <ssbssa at sourceware dot org> ---
(In reply to pgmer6809 from comment #0)
> (gdb) jump 40
> Continuing at 0x40107a.
I don't think the coverage code likes it if you jump around the code manually
like this.
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end of thread, other threads:[~2024-01-02 18:53 UTC | newest]
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2015-04-25 4:06 [Bug gdb/18328] New: gdb does not work properly with gcov to update statement coverage pgmer6809 at yahoo dot com
2024-01-02 18:53 ` [Bug gdb/18328] " ssbssa at sourceware dot org
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