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dbghelp: Don't include global & static variables from S_LOCAL* records.
PDB supports description of a global or static variable: - accessed from a register - stored as a local variable record inside a function This likely describes access to a global/static variable where intermediate computation is kept in a register. We cannot store this kind of entries in local variable lists (builtin dbghelp and winedbg are not prepared to handle a global variable) Note: the global or static Codeview data record is still present (with a relocatable address), so the variable should still be available from global access (but could be not up-to-date if temporarly stored in a register). Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
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@ -1821,6 +1821,17 @@ static void codeview_xform_range(const struct msc_debug_info* msc_dbg,
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locinfo->rangelen = adrange->cbRange;
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}
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static unsigned codeview_defrange_length(const union codeview_symbol* sym)
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{
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const union codeview_symbol* first_symrange = get_next_sym(sym);
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const union codeview_symbol* symrange;
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for (symrange = first_symrange;
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symrange->generic.id >= S_DEFRANGE && symrange->generic.id <= S_DEFRANGE_REGISTER_REL;
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symrange = get_next_sym(symrange)) {}
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return (const char*)symrange - (const char*)first_symrange;
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}
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static unsigned codeview_transform_defrange(const struct msc_debug_info* msc_dbg,
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struct symt_function* curr_func,
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const union codeview_symbol* sym,
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@ -2567,12 +2578,21 @@ static BOOL codeview_snarf(const struct msc_debug_info* msc_dbg,
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}
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break;
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case S_LOCAL:
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length += codeview_transform_defrange(msc_dbg, curr_func, sym, &loc);
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symt_add_func_local(msc_dbg->module, curr_func,
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sym->local_v3.varflags.is_param ? DataIsParam : DataIsLocal,
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&loc, block,
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codeview_get_type(sym->local_v3.symtype, FALSE),
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sym->local_v3.name);
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/* FIXME: don't store global/static variables accessed through registers... we don't support that
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* in locals... anyway, global data record should be present as well (so variable will be avaible
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* through global defintion, but potentially not updated)
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*/
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if (!sym->local_v3.varflags.enreg_global && !sym->local_v3.varflags.enreg_static)
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{
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length += codeview_transform_defrange(msc_dbg, curr_func, sym, &loc);
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symt_add_func_local(msc_dbg->module, curr_func,
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sym->local_v3.varflags.is_param ? DataIsParam : DataIsLocal,
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&loc, block,
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codeview_get_type(sym->local_v3.symtype, FALSE),
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sym->local_v3.name);
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}
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else
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length += codeview_defrange_length(sym);
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break;
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case S_INLINESITE:
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{
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