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PODWARF info seem to be wrong for DW_AT_high_pc with gcc 4.8.2
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20097138
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20098583
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3
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2013-11-20T13:20:21.507
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1
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2016-09-15T18:59:41.933
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2014-04-04T13:35:19.947
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2098913
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1
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As a newbie to DWARF, I tried the code presented <a href="http://eli.thegreenplace.net/2011/02/07/how-debuggers-work-part-3-debugging-information/" rel="nofollow">in this page</a> (code is <a href="http://eli.thegreenplace.net/files/prog_code/articles_code/debugger/dwarf_get_func_addr.c" rel="nofollow">here</a>) but when I launch it I get: <pre><code>$> ./dwarf_get_func_addr tracedprog DW_TAG_subprogram: 'do_stuff' abort() in libdwarf. No error argument, no handler. zsh: abort (core dumped) ./dwarf_get_func_addr tracedprog </code></pre> After a debugging session, the problem appears to come from line 78: <pre><code> else if (attrcode == DW_AT_high_pc) dwarf_formaddr(attrs[i], &highpc, 0); </code></pre> The problem is, the <code>form</code> of <code>attrs[i]</code> shows <code>attrs[i]</code> is not an address (it is set to 7 instead of 1). Exploring <code>tracedprog</code> with <code>objdump</code> it gives, for <code>do_stuff</code> function: <pre><code><1><73>: Numéro d'abréviation: 4 (DW_TAG_subprogram) <74> DW_AT_external : 1 <74> DW_AT_name : (chaîne indirecte, décalage: 0x55): do_stuff <78> DW_AT_decl_file : 1 <79> DW_AT_decl_line : 4 <7a> DW_AT_prototyped : 1 <7a> DW_AT_low_pc : 0x400500 <82> DW_AT_high_pc : 0x3f <8a> DW_AT_frame_base : 1 bloc d'octets: 9c (DW_OP_call_frame_cfa) <8c> DW_AT_GNU_all_tail_call_sites: 1 <8c> DW_AT_sibling : <0xb9> </code></pre> In this output, <code>DW_AT_high_pc</code> doesn't seem correct to me as it is only two octets long. For your reference, I compiled <code>tracedprog</code> with: <pre><code>$> gcc -g tracedprog2.c -o tracedprog </code></pre> Edit it seems to be a <code>gcc</code> issue as there is no issue on another machine. I am using <code>gcc 4.8.2</code>.
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<c><gcc><objdump><dwarf>
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DWARF info seem to be wrong for DW_AT_high_pc with gcc 4.8.2
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