[Crash-utility] [PATCH] gdb: Fix an assertion failure in the dw2_find_pc_sect_compunit_symtab()
This is a backported patch from gdb. Without the patch, the "dis -rl"
command may abort due to an assertion failure in the gdb's
dw2_find_pc_sect_compunit_symtab():
crash> dis -rl ffffffff96ad716c
dwarf2/read.c:4928: internal-error: compunit_symtab*
dw2_find_pc_sect_compunit_symtab(objfile*, bound_minimal_symbol, CORE_ADDR, obj_section*,
int): Assertion `result != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) dwarf2/read.c:4928: internal-error:
compunit_symtab* dw2_find_pc_sect_compunit_symtab(objfile*, bound_minimal_symbol,
CORE_ADDR, obj_section*, int): Assertion `result != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Aborted (core dumped)
The gdb commit 834eaf9201c1 ("Fix crash in new DWARF indexer")
solved the current issue.
Reported-by: Buland Kumar Singh <bsingh(a)redhat.com>
Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com>
---
gdb-10.2.patch | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/gdb-10.2.patch b/gdb-10.2.patch
index aa34743501ad..d762680eb472 100644
--- a/gdb-10.2.patch
+++ b/gdb-10.2.patch
@@ -12,7 +12,8 @@ tar xvzmf gdb-10.2.tar.gz \
gdb-10.2/gdb/symtab.c \
gdb-10.2/gdb/printcmd.c \
gdb-10.2/gdb/symfile.c \
- gdb-10.2/gdb/Makefile.in
+ gdb-10.2/gdb/Makefile.in \
+ gdb-10.2/gdb/dwarf2/read.c
exit 0
@@ -2078,3 +2079,16 @@ exit 0
return new_type;
}
+--- gdb-10.2/gdb/dwarf2/read.c.orig
++++ gdb-10.2/gdb/dwarf2/read.c
+@@ -4925,7 +4925,10 @@ dw2_find_pc_sect_compunit_symtab (struct objfile *objfile,
+ result = recursively_find_pc_sect_compunit_symtab
+ (dw2_instantiate_symtab (data, per_objfile, false), pc);
+
+- gdb_assert (result != NULL);
++ if (warn_if_readin && result == nullptr)
++ warning (_("(Error: pc %s in address map, but not in symtab.)"),
++ paddress (objfile->arch (), pc));
++
+ return result;
+ }
--
2.37.1