* Re: [patchv2] Do not skip prologue for asm (.S) files
@ 2015-06-26 12:57 Doug Evans
2015-06-26 13:16 ` [commit] " Jan Kratochvil
0 siblings, 1 reply; 2+ messages in thread
From: Doug Evans @ 2015-06-26 12:57 UTC (permalink / raw)
To: Jan Kratochvil; +Cc: gdb-patches, Sergio Durigan Junior
Jan Kratochvil writes:
> On Thu, 25 Jun 2015 22:42:48 +0200, Doug Evans wrote:
> > Hmmm, so there's an undocumented requirement that minsym_found
> > and find_function_start_sal work compatibly?
> > [Which is actually not surprising if you know how linespecs and
> > breakpoints: we find all the matching minsyms and fullsyms
> > and then throw away the duplicates. But if these two functions
> > behave differently then the search for duplicates fails. At least
> > I'm guessing that's what happened here.]
>
> Yes:
> # (gdb) file
/root/jkratoch/redhat/gdb-clean/gdb/testsuite/gdb.base/breako2
> # Reading symbols from
/root/jkratoch/redhat/gdb-clean/gdb/testsuite/gdb.base/breako2...done.
> # (gdb) break main
> #-Breakpoint 1 at 0x10000644: file ./gdb.base/break.c, line 43.
> #-(gdb) PASS: gdb.base/break.exp: breakpoint function, optimized file
> #+Breakpoint 1 at 0x10000640: main. (2 locations)
> #### Num Type Disp Enb Address What
> #### 1 breakpoint keep y <MULTIPLE>
> #### 1.1 y 0x0000000010000640 in main
at ./gdb.base/break.c:42
> #### 1.2 y 0x0000000010000644 in main
at ./gdb.base/break.c:43
> #+(gdb) FAIL: gdb.base/break.exp: breakpoint function, optimized file
> # break marker4
> # Breakpoint 2 at 0x10000aa0: file ./gdb.base/break1.c, line 59.
> # (gdb) PASS: gdb.base/break.exp: breakpoint small function, optimized
file
> #[...]
> # Continuing.
> #-720
> #-Breakpoint 2, marker4 (d=177601976) at ./gdb.base/break1.c:59
> #-59 void marker4 (long d) { values[0].a_field = d; } /* set
breakpoint 14 here */
> #-(gdb) PASS: gdb.base/break.exp: run until breakpoint set at small
function, optimized file (line bp_location14)
> #+Breakpoint 1, main (argc=1, argv=0x3fffffffec48, envp=0x3fffffffec58)
at ./gdb.base/break.c:43
> #+43 if (argc == 12345) { /* an unlikely value < 2^16, in case
uninited */ /* set breakpoint 6 here */
> #+(gdb) FAIL: gdb.base/break.exp: run until breakpoint set at small
function, optimized file
>
>
> > Can you do that, plus add a comment to both minsym_found
> > and find_function_start_sal stating that we rely on them
> > working compatibly.
>
> Done. Providing for review the final patch given all the changes.
>
>
> Thanks,
> Jan
> gdb/ChangeLog
> 2015-06-26 Jan Kratochvil <jan.kratochvil@redhat.com>
>
> * linespec.c (minsym_found): Reset sal.PC for COMPUNIT_LOCATIONS_VALID
> and language_asm..
> * symtab.c (find_function_start_sal): Likewise.
>
> gdb/testsuite/ChangeLog
> 2015-06-20 Jan Kratochvil <jan.kratochvil@redhat.com>
>
> * gdb.arch/amd64-prologue-skip.S: New file.
> * gdb.arch/amd64-prologue-skip.exp: New file.
LGTM.
Thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
* [commit] [patchv2] Do not skip prologue for asm (.S) files
2015-06-26 12:57 [patchv2] Do not skip prologue for asm (.S) files Doug Evans
@ 2015-06-26 13:16 ` Jan Kratochvil
0 siblings, 0 replies; 2+ messages in thread
From: Jan Kratochvil @ 2015-06-26 13:16 UTC (permalink / raw)
To: Doug Evans; +Cc: gdb-patches, Sergio Durigan Junior
On Fri, 26 Jun 2015 14:57:41 +0200, Doug Evans wrote:
> LGTM.
Checked in:
6e22494e5076e4d3c0b2c2785883162f83db499e
Jan
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