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From d34232858880672a9e6b88ff5ebd966969aabb9f Mon Sep 17 00:00:00 2001
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From: Jakub Filak <jfilak@redhat.com>
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Date: Mon, 7 Sep 2015 08:08:16 +0200
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Subject: [PATCH] core_unwind: fix the missing frame build_id and file_name
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The documentation of dwfl_module_build_id() says:
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This returns 0 when the module's main ELF file has not yet been loaded
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and its build ID bits were not reported. To ensure the ID is always
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returned when determinable, call dwfl_module_getelf first.
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/usr/include/elfutils/libdwfl.h
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ABRT upstream commit 88c6b3683a129c0e369071204b29fbca94772d3b verifies
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this patch.
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Discovered by Richard Marko <rmarko@redhat.com>
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Resolved by Mark Wielaard <mjw@redhat.com>
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Related: #1210599
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Signed-off-by: Jakub Filak <jfilak@redhat.com>
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---
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lib/core_unwind.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/lib/core_unwind.c b/lib/core_unwind.c
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index cf9973a..c30f9db 100644
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--- a/lib/core_unwind.c
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+++ b/lib/core_unwind.c
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@@ -278,9 +278,14 @@ resolve_frame(Dwfl *dwfl, Dwarf_Addr ip, bool minus_one)
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int ret;
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const unsigned char *build_id_bits;
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const char *filename, *funcname;
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- GElf_Addr bid_addr;
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+ GElf_Addr bias, bid_addr;
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Dwarf_Addr start;
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+ /* Initialize the module's main Elf for dwfl_module_build_id and dwfl_module_info */
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+ /* No need to deallocate the variable 'bias' and the return value.*/
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+ if (NULL == dwfl_module_getelf(mod, &bias))
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+ warn("The module's main Elf was not found");
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+
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ret = dwfl_module_build_id(mod, &build_id_bits, &bid_addr);
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if (ret > 0)
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{
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--
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2.4.3
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