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dbghelp: Introduce symt_find_symbol_at().
To be used in place of symt_find_nearest(). symt_find_symbol_at() ensures that the address passed is within the boundaries of the returned symbol (while find_nearest() doesn't). This fixes erroneous backtraces in debugger like: $ ./wine winedbg notepad WineDbg starting on pid 0104 RtlDefaultNpAcl () at Z:\home\eric\work\wine\dlls\ntdll\sec.c:1731 0x00000170054805 ntdll+0x54805 [Z:\home\eric\work\wine\dlls\ntdll\sec.c:1731]: ret 1731 } Wine-dbg>bt Backtrace: =>0 0x00000170054805 RtlDefaultNpAcl+0x2d5(pAcl=<internal error>) [Z:\home\eric\work\wine\dlls\ntdll\sec.c:1731] in ntdll (0x000001700701a4) 1 0x0000017002d6c4 __wine_pop_frame(pAcl=<internal error>) [Z:\home\eric\work\wine\include\wine\exception.h:273] in ntdll (0x000001700701a4) 2 0x0000017002d6c4 process_breakpoint+0x84() [Z:\home\eric\work\wine\dlls\ntdll\loader.c:3912] in ntdll (0x000001700701a4) 3 0x000001700354c9 LdrInitializeThunk+0x509(context=<register R13 not accessible in this frame>, unknown2=<internal error>, unknown3=<internal error>, unknown4=<internal error>) [Z:\home\eric\work\wine\dlls\ntdll\loader.c:4200] in ntdll (0x000001700701a4) where RtlDefaultNpAcl() has nothing to do here (it's the symbol below RIP and we don't have a symbol with debug information for that address). Signed-off-by: Eric Pouech <eric.pouech@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
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@ -672,7 +672,7 @@ BOOL WINAPI SymSetScopeFromAddr(HANDLE hProcess, ULONG64 addr)
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if (!module_init_pair(&pair, hProcess, addr)) return FALSE;
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pair.pcs->localscope_pc = addr;
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if ((sym = symt_find_nearest(pair.effective, addr)) != NULL && sym->symt.tag == SymTagFunction)
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if ((sym = symt_find_symbol_at(pair.effective, addr)) != NULL && sym->symt.tag == SymTagFunction)
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pair.pcs->localscope_symt = &sym->symt;
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else
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pair.pcs->localscope_symt = NULL;
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@ -811,6 +811,8 @@ extern void copy_symbolW(SYMBOL_INFOW* siw, const SYMBOL_INFO* si) DECLS
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extern void symbol_setname(SYMBOL_INFO* si, const char* name) DECLSPEC_HIDDEN;
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extern struct symt_ht*
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symt_find_nearest(struct module* module, DWORD_PTR addr) DECLSPEC_HIDDEN;
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extern struct symt_ht*
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symt_find_symbol_at(struct module* module, DWORD_PTR addr) DECLSPEC_HIDDEN;
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extern struct symt_module*
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symt_new_module(struct module* module) DECLSPEC_HIDDEN;
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extern struct symt_compiland*
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@ -2584,7 +2584,7 @@ static void dwarf2_set_line_number(struct module* module, ULONG_PTR address,
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TRACE("%s %Ix %s %u\n",
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debugstr_w(module->modulename), address, debugstr_a(source_get(module, *psrc)), line);
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symt = symt_find_nearest(module, address);
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symt = symt_find_symbol_at(module, address);
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if (symt_check_tag(&symt->symt, SymTagFunction))
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{
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func = (struct symt_function*)symt;
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@ -1461,7 +1461,7 @@ static void codeview_snarf_linetab(const struct msc_debug_info* msc_dbg, const B
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*/
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if (!func || addr >= func->address + func->size)
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{
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func = (struct symt_function*)symt_find_nearest(msc_dbg->module, addr);
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func = (struct symt_function*)symt_find_symbol_at(msc_dbg->module, addr);
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/* FIXME: at least labels support line numbers */
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if (!symt_check_tag(&func->symt, SymTagFunction) && !symt_check_tag(&func->symt, SymTagInlineSite))
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{
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@ -1534,7 +1534,7 @@ static void codeview_snarf_linetab2(const struct msc_debug_info* msc_dbg, const
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lines = CV_RECORD_AFTER(files_hdr);
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for (i = 0; i < files_hdr->nLines; i++)
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{
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func = (struct symt_function*)symt_find_nearest(msc_dbg->module, lineblk_base + lines[i].offset);
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func = (struct symt_function*)symt_find_symbol_at(msc_dbg->module, lineblk_base + lines[i].offset);
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/* FIXME: at least labels support line numbers */
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if (!symt_check_tag(&func->symt, SymTagFunction) && !symt_check_tag(&func->symt, SymTagInlineSite))
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{
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@ -1619,7 +1619,7 @@ static inline void codeview_add_variable(const struct msc_debug_info* msc_dbg,
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loc.kind = in_tls ? loc_tlsrel : loc_absolute;
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loc.reg = 0;
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loc.offset = in_tls ? offset : codeview_get_address(msc_dbg, segment, offset);
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if (force || in_tls || !symt_find_nearest(msc_dbg->module, loc.offset))
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if (force || in_tls || !symt_find_symbol_at(msc_dbg->module, loc.offset))
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{
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symt_new_global_variable(msc_dbg->module, compiland,
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name, is_local, loc, 0,
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@ -2501,7 +2501,7 @@ static BOOL codeview_snarf(const struct msc_debug_info* msc_dbg,
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if (!top_func)
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{
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ULONG_PTR parent_addr = codeview_get_address(msc_dbg, sym->sepcode_v3.sectParent, sym->sepcode_v3.offParent);
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struct symt_ht* parent = symt_find_nearest(msc_dbg->module, parent_addr);
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struct symt_ht* parent = symt_find_symbol_at(msc_dbg->module, parent_addr);
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if (symt_check_tag(&parent->symt, SymTagFunction))
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{
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struct symt_function* pfunc = (struct symt_function*)parent;
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@ -1027,7 +1027,7 @@ static void symt_get_length(struct module* module, const struct symt* symt, ULON
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if (symt_get_info(module, symt, TI_GET_TYPE, &type_index) &&
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symt_get_info(module, symt_index2ptr(module, type_index), TI_GET_LENGTH, size)) return;
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*size = 0x1000; /* arbitrary value */
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*size = 1; /* no size info */
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}
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/* needed by symt_find_nearest */
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@ -1104,6 +1104,20 @@ struct symt_ht* symt_find_nearest(struct module* module, DWORD_PTR addr)
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return module->addr_sorttab[low];
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}
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struct symt_ht* symt_find_symbol_at(struct module* module, DWORD_PTR addr)
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{
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struct symt_ht* nearest = symt_find_nearest(module, addr);
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if (nearest)
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{
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ULONG64 symaddr, symsize;
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symt_get_address(&nearest->symt, &symaddr);
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symt_get_length(module, &nearest->symt, &symsize);
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if (addr < symaddr || addr >= symaddr + symsize)
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nearest = NULL;
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}
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return nearest;
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}
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static BOOL symt_enum_locals_helper(struct module_pair* pair,
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const WCHAR* match, const struct sym_enum* se,
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struct symt_function* func, const struct vector* v)
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@ -1262,7 +1276,7 @@ struct symt* symt_get_upper_inlined(struct symt_inlinesite* inlined)
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/* lookup in module for an inline site (from addr and inline_ctx) */
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struct symt_inlinesite* symt_find_inlined_site(struct module* module, DWORD64 addr, DWORD inline_ctx)
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{
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struct symt_ht* symt = symt_find_nearest(module, addr);
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struct symt_ht* symt = symt_find_symbol_at(module, addr);
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if (symt_check_tag(&symt->symt, SymTagFunction))
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{
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@ -1284,7 +1298,7 @@ DWORD symt_get_inlinesite_depth(HANDLE hProcess, DWORD64 addr)
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if (module_init_pair(&pair, hProcess, addr))
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{
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struct symt_ht* symt = symt_find_nearest(pair.effective, addr);
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struct symt_ht* symt = symt_find_symbol_at(pair.effective, addr);
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if (symt_check_tag(&symt->symt, SymTagFunction))
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{
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struct symt_inlinesite* inlined = symt_find_lowest_inlined((struct symt_function*)symt, addr);
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@ -1518,7 +1532,7 @@ BOOL WINAPI SymFromAddr(HANDLE hProcess, DWORD64 Address,
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struct symt_ht* sym;
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if (!module_init_pair(&pair, hProcess, Address)) return FALSE;
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if ((sym = symt_find_nearest(pair.effective, Address)) == NULL) return FALSE;
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if ((sym = symt_find_symbol_at(pair.effective, Address)) == NULL) return FALSE;
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symt_fill_sym_info(&pair, NULL, &sym->symt, Symbol);
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if (Displacement)
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@ -1905,7 +1919,7 @@ static BOOL get_line_from_addr(HANDLE hProcess, DWORD64 addr,
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struct symt_ht* symt;
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if (!module_init_pair(&pair, hProcess, addr)) return FALSE;
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if ((symt = symt_find_nearest(pair.effective, addr)) == NULL) return FALSE;
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if ((symt = symt_find_symbol_at(pair.effective, addr)) == NULL) return FALSE;
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if (symt->symt.tag != SymTagFunction && symt->symt.tag != SymTagInlineSite) return FALSE;
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return get_line_from_function(&pair, (struct symt_function*)symt, addr, pdwDisplacement, intl);
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