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* [Bug debug/45103] New: DW_OP_reg* has too large valid range for noreturn funcs @ 2010-07-28 9:54 jan dot kratochvil at redhat dot com 2010-07-28 9:55 ` [Bug debug/45103] " jan dot kratochvil at redhat dot com ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: jan dot kratochvil at redhat dot com @ 2010-07-28 9:54 UTC (permalink / raw) To: gcc-bugs Use -g -O2. DW_OP_reg5 is there valid for each PC, despite there si a `call' and reg5 is caller-saved register. Its value therefore gets corrupted in the callee. FAIL all these: gcc (GCC) 4.6.0 20100724 (experimental) gcc (GCC) 4.5.1 20100728 (prerelease) gcc (GCC) 4.4.5 20100724 (prerelease) gcc-4.4.4-10.fc13.x86_64 GNU gdb (GDB) 7.2.50.20100724-cvs #0 breakat (q=0) at 1.c:7 #1 0x000000000040053b in f (a1=<value optimized out>, a2=2, a3=3, a4=4, a5=5, a6=6, a7=7) at 2.c:6 #2 0x00000000004004fc in g (x=0) at 1.c:14 ^^^ x=10 here, it should be <value optimized out> #3 0x000000000040051e in main () at 2.c:14 ==> 1.c <== #include <stdlib.h> extern __attribute__((noreturn)) void f (long a1, long a2, long a3, long a4, long a5, long a6, long a7); __attribute__((noreturn)) void breakat (long q) { exit (0); } __attribute__((noinline)) void g (long x) { f (x, 2, 3, 4, 5, 6, 7); } ==> 2.c <== extern __attribute__((noreturn)) void breakat (long q); __attribute__((noreturn)) void f (long a1, long a2, long a3, long a4, long a5, long a6, long a7) { breakat (0); } extern __attribute__((noinline)) void g (long x); int main (void) { g (10); return 0; } -- Summary: DW_OP_reg* has too large valid range for noreturn funcs Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: jan dot kratochvil at redhat dot com GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45103 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug debug/45103] DW_OP_reg* has too large valid range for noreturn funcs 2010-07-28 9:54 [Bug debug/45103] New: DW_OP_reg* has too large valid range for noreturn funcs jan dot kratochvil at redhat dot com @ 2010-07-28 9:55 ` jan dot kratochvil at redhat dot com 2010-07-28 10:03 ` jakub at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: jan dot kratochvil at redhat dot com @ 2010-07-28 9:55 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from jan dot kratochvil at redhat dot com 2010-07-28 09:54 ------- Created an attachment (id=21331) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21331&action=view) .s files for x86_64-unknown-linux-gnu. GDB bug (probably invalid): http://sourceware.org/bugzilla/show_bug.cgi?id=11838 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45103 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug debug/45103] DW_OP_reg* has too large valid range for noreturn funcs 2010-07-28 9:54 [Bug debug/45103] New: DW_OP_reg* has too large valid range for noreturn funcs jan dot kratochvil at redhat dot com 2010-07-28 9:55 ` [Bug debug/45103] " jan dot kratochvil at redhat dot com @ 2010-07-28 10:03 ` jakub at gcc dot gnu dot org 2010-07-28 17:00 ` jakub at gcc dot gnu dot org 2010-09-07 22:46 ` jakub at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: jakub at gcc dot gnu dot org @ 2010-07-28 10:03 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from jakub at gcc dot gnu dot org 2010-07-28 10:03 ------- Created an attachment (id=21332) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21332&action=view) gcc46-pr45103.patch For noreturn calls that end the function we were ignoring even NOTE_DURING_CALL_P notes, thinking they don't affect any instructions. While they don't affect any instructions in the current function, they affect instructions in the called function. -- jakub at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |jakub at gcc dot gnu dot org |dot org | Status|UNCONFIRMED |ASSIGNED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45103 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug debug/45103] DW_OP_reg* has too large valid range for noreturn funcs 2010-07-28 9:54 [Bug debug/45103] New: DW_OP_reg* has too large valid range for noreturn funcs jan dot kratochvil at redhat dot com 2010-07-28 9:55 ` [Bug debug/45103] " jan dot kratochvil at redhat dot com 2010-07-28 10:03 ` jakub at gcc dot gnu dot org @ 2010-07-28 17:00 ` jakub at gcc dot gnu dot org 2010-09-07 22:46 ` jakub at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: jakub at gcc dot gnu dot org @ 2010-07-28 17:00 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from jakub at gcc dot gnu dot org 2010-07-28 17:00 ------- Subject: Bug 45103 Author: jakub Date: Wed Jul 28 17:00:06 2010 New Revision: 162646 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162646 Log: PR debug/45103 * dwarf2out.c (dwarf2out_var_location): Always consider NOTE_DURING_CALL_P notes, even when not followed by real instructions. Modified: trunk/gcc/ChangeLog trunk/gcc/dwarf2out.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45103 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug debug/45103] DW_OP_reg* has too large valid range for noreturn funcs 2010-07-28 9:54 [Bug debug/45103] New: DW_OP_reg* has too large valid range for noreturn funcs jan dot kratochvil at redhat dot com ` (2 preceding siblings ...) 2010-07-28 17:00 ` jakub at gcc dot gnu dot org @ 2010-09-07 22:46 ` jakub at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: jakub at gcc dot gnu dot org @ 2010-09-07 22:46 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from jakub at gcc dot gnu dot org 2010-09-07 22:46 ------- Fixed. -- jakub at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45103 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-09-07 22:46 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-07-28 9:54 [Bug debug/45103] New: DW_OP_reg* has too large valid range for noreturn funcs jan dot kratochvil at redhat dot com 2010-07-28 9:55 ` [Bug debug/45103] " jan dot kratochvil at redhat dot com 2010-07-28 10:03 ` jakub at gcc dot gnu dot org 2010-07-28 17:00 ` jakub at gcc dot gnu dot org 2010-09-07 22:46 ` jakub at gcc dot gnu dot org
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