[MacPorts] #48284: gdb @7.9.1_0: cannot determine type of primitive global variables

[MacPorts]

#48284: gdb @7.9.1_0: cannot determine type of primitive global variables
---------------------+-------------------------------
  Reporter:  rbd@…   |      Owner:  stuartwesterman@…
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.3.3
Resolution:          |   Keywords:
      Port:  gdb     |
---------------------+-------------------------------

Comment (by stuartwesterman@…):

 When you compile in the way that you have above, the debug symbols are not
 created.

 I think you say it the best here:

     I have read that dsymutil is *not* run when the source files are
 separately compiled into .o files and the latter are then linked with a
 separate command (as in my multi-file cc command     sequence shown
 above). Perhaps this has some bearing on the problem?

 Simply run '''dsymutil''' on your output elf, after linking.

 The following works for me:

 {{{

 wei at r [gdbtest]$ cc -g -c m0.c -o m0.o; cc -g -c m1.c -o m1.o; cc -g m*.o
 -o m
 wei at r [gdbtest]$ la
 total 56
 drwxr-xr-x  7 wei  staff   238B Jul 12 17:21 ./
 drwxr-xr-x  8 wei  staff   272B Jul 12 16:13 ../
 -rwxr-xr-x  1 wei  staff   8.7K Jul 12 17:21 m*
 -rw-r--r--  1 wei  staff   118B Jul 12 16:17 m0.c
 -rw-r--r--  1 wei  staff   2.4K Jul 12 17:21 m0.o
 -rw-r--r--  1 wei  staff   106B Jul 12 16:13 m1.c
 -rw-r--r--  1 wei  staff   2.3K Jul 12 17:21 m1.o
 wei at r [gdbtest]$ dsymutil m
 wei at r [gdbtest]$ la
 total 56
 drwxr-xr-x  8 wei  staff   272B Jul 12 17:21 ./
 drwxr-xr-x  8 wei  staff   272B Jul 12 16:13 ../
 -rwxr-xr-x  1 wei  staff   8.7K Jul 12 17:21 m*
 drwxr-xr-x  3 wei  staff   102B Jul 12 17:21 m.dSYM/
 -rw-r--r--  1 wei  staff   118B Jul 12 16:17 m0.c
 -rw-r--r--  1 wei  staff   2.4K Jul 12 17:21 m0.o
 -rw-r--r--  1 wei  staff   106B Jul 12 16:13 m1.c
 -rw-r--r--  1 wei  staff   2.3K Jul 12 17:21 m1.o
 wei at r [gdbtest]$ ggdb m
 GNU gdb (GDB) 7.9.1
 Copyright (C) 2015 Free Software Foundation, Inc.
 License GPLv3+: GNU GPL version 3 or later
 <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 and "show warranty" for details.
 This GDB was configured as "x86_64-apple-darwin14.3.0".
 Type "show configuration" for configuration details.
 For bug reporting instructions, please see:
 <http://www.gnu.org/software/gdb/bugs/>.
 Find the GDB manual and other documentation resources online at:
 <http://www.gnu.org/software/gdb/documentation/>.
 For help, type "help".
 Type "apropos word" to search for commands related to "word"...
 Reading symbols from m...Reading symbols from
 /Users/wei/code/gdbtest/m.dSYM/Contents/Resources/DWARF/m...done.
 done.
 (gdb) break main
 Breakpoint 1 at 0x100000eee: file m0.c, line 5.
 (gdb) break func
 Breakpoint 2 at 0x100000f27: file m1.c, line 5.
 (gdb) run
 Starting program: /Users/wei/code/gdbtest/m
 warning: Could not open OSO archive file
 "/BinaryCache/corecrypto/corecrypto-233.1.2~26/Symbols/BuiltProducts/libcorecrypto_static.a"
 warning:
 `/BinaryCache/coreTLS/coreTLS-35.20.2~10/Objects/coretls.build/coretls.build
 /Objects-normal/x86_64/system_coretls_vers.o': can't open to read symbols:
 No such file or directory.
 warning: Could not open OSO archive file
 "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_ciphersuites.a"
 warning: Could not open OSO archive file
 "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_handshake.a"
 warning: Could not open OSO archive file
 "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_record.a"
 warning: Could not open OSO archive file
 "/BinaryCache/coreTLS/coreTLS-35.20.2~10/Symbols/BuiltProducts/libcoretls_stream_parser.a"

 Breakpoint 1, main () at m0.c:5
 5         gf = 1.23;
 (gdb) ptype gf
 type = float
 (gdb) continue
 Continuing.
 gf: 1.23

 Breakpoint 2, func () at m1.c:5
 5         lf = 4.56;
 (gdb) ptype gf
 type = float
 (gdb) q
 A debugging session is active.

         Inferior 1 [process 388] will be killed.

 Quit anyway? (y or n) y
 wei at r [gdbtest]$

 }}}

 Given the size and complexity of your project this may not help you, but
 compiling in the following way automatically runs '''dsymutil''':

 {{{

 wei at r [gdbtest]$ la
 total 16
 drwxr-xr-x  4 wei  staff   136B Jul 12 16:29 ./
 drwxr-xr-x  8 wei  staff   272B Jul 12 16:13 ../
 -rw-r--r--  1 wei  staff   118B Jul 12 16:17 m0.c
 -rw-r--r--  1 wei  staff   106B Jul 12 16:13 m1.c
 wei at r [gdbtest]$ cc -g m0.c m1.c -o m
 wei at r [gdbtest]$ la
 total 40
 drwxr-xr-x  6 wei  staff   204B Jul 12 16:29 ./
 drwxr-xr-x  8 wei  staff   272B Jul 12 16:13 ../
 -rwxr-xr-x  1 wei  staff   8.8K Jul 12 16:29 m*
 drwxr-xr-x  3 wei  staff   102B Jul 12 16:29 m.dSYM/
 -rw-r--r--  1 wei  staff   118B Jul 12 16:17 m0.c
 -rw-r--r--  1 wei  staff   106B Jul 12 16:13 m1.c
 wei at r [gdbtest]$

 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/48284#comment:2>
MacPorts <https://www.macports.org/>
Ports system for OS X