Eric Pouech : dbghelp: dwarf debug info: a few more fixes to dwarf parsing.
Alexandre Julliard
julliard at winehq.org
Thu Aug 26 11:42:02 CDT 2010
Module: wine
Branch: master
Commit: 1e0af22ad2ed5a0dc9bf7f39814b00b223ce453f
URL: http://source.winehq.org/git/wine.git/?a=commit;h=1e0af22ad2ed5a0dc9bf7f39814b00b223ce453f
Author: Eric Pouech <eric.pouech at orange.fr>
Date: Wed Aug 25 21:43:46 2010 +0200
dbghelp: dwarf debug info: a few more fixes to dwarf parsing.
---
dlls/dbghelp/dbghelp_private.h | 1 +
dlls/dbghelp/dwarf.c | 16 ++++++++++++++++
programs/winedbg/memory.c | 5 ++++-
3 files changed, 21 insertions(+), 1 deletions(-)
diff --git a/dlls/dbghelp/dbghelp_private.h b/dlls/dbghelp/dbghelp_private.h
index f4c88a0..531a740 100644
--- a/dlls/dbghelp/dbghelp_private.h
+++ b/dlls/dbghelp/dbghelp_private.h
@@ -132,6 +132,7 @@ enum location_error {loc_err_internal = -1, /* internal while computing */
loc_err_too_complex = -2, /* couldn't compute location (even at runtime) */
loc_err_out_of_scope = -3, /* variable isn't available at current address */
loc_err_cant_read = -4, /* couldn't read memory at given address */
+ loc_err_no_location = -5, /* likely optimized away (by compiler) */
};
struct location
diff --git a/dlls/dbghelp/dwarf.c b/dlls/dbghelp/dwarf.c
index a0fcc12..d67c72a 100644
--- a/dlls/dbghelp/dwarf.c
+++ b/dlls/dbghelp/dwarf.c
@@ -1511,6 +1511,22 @@ static void dwarf2_parse_variable(dwarf2_subprogram_t* subpgm,
di->symt = &symt_new_constant(subpgm->ctx->module, subpgm->compiland,
name.u.string, param_type, &v)->symt;
}
+ else
+ {
+ /* variable has been optimiezd away... report anyway */
+ loc.kind = loc_error;
+ loc.reg = loc_err_no_location;
+ if (subpgm->func)
+ {
+ symt_add_func_local(subpgm->ctx->module, subpgm->func,
+ is_pmt ? DataIsParam : DataIsLocal,
+ &loc, block, param_type, name.u.string);
+ }
+ else
+ {
+ WARN("dropping global variable %s which has been optimized away\n", name.u.string);
+ }
+ }
if (is_pmt && subpgm->func && subpgm->func->type)
symt_add_function_signature_parameter(subpgm->ctx->module,
(struct symt_function_signature*)subpgm->func->type,
diff --git a/programs/winedbg/memory.c b/programs/winedbg/memory.c
index 7d6112a..1c8388c 100644
--- a/programs/winedbg/memory.c
+++ b/programs/winedbg/memory.c
@@ -676,7 +676,7 @@ BOOL memory_get_register(DWORD regno, DWORD_PTR** value, char* buffer, int len)
const struct dbg_internal_var* div;
/* negative register values are wine's dbghelp hacks
- * see dlls/dbghelp/dbghelp_internal.h for the details
+ * see dlls/dbghelp/dbghelp_private.h for the details
*/
switch (regno)
{
@@ -692,6 +692,9 @@ BOOL memory_get_register(DWORD regno, DWORD_PTR** value, char* buffer, int len)
case -4:
if (buffer) snprintf(buffer, len, "<couldn't read memory>");
return FALSE;
+ case -5:
+ if (buffer) snprintf(buffer, len, "<has been optimized away by compiler>");
+ return FALSE;
}
for (div = be_cpu->context_vars; div->name; div++)
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