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d268577515
This lead, among other things, to crashes of the apps built with TSan enabled. When the app (or, to be exact, TSan) tried to output a backtrace of a suspicious event, backtrace_pcinfo() was invoked. At the end it called state->fileline_fn() which should have been set before. However, it was not always the case. If debug info was missing from some library used by the app or it was in a format that libbacktrace did not understand, libbacktrace did not set state->fileline_fn. The latter remained 0 and that resulted in a segfault in backtrace_pcinfo(). Should now be fixed. The fix makes sure that the callback is always initialized.
11 lines
417 B
Diff
11 lines
417 B
Diff
--- gcc-linaro-4.9-2014.07/libbacktrace/elf.c.orig 2014-03-07 09:07:56.000000000 +0400
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+++ gcc-linaro-4.9-2014.07/libbacktrace/elf.c 2014-08-13 12:56:23.285272323 +0400
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@@ -925,7 +925,7 @@
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int ret;
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int found_sym;
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int found_dwarf;
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- fileline elf_fileline_fn;
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+ fileline elf_fileline_fn = elf_nodebug;
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struct phdr_data pd;
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ret = elf_add (state, descriptor, 0, error_callback, data, &elf_fileline_fn,
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