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Handle frame pointer omission, (#21), part 4 (final part!): FPO stackwalker.

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r=bryner
 - This change allows Airbag to properly walk win32 stacks produced by code
   built with MSVC's frame pointer omission optimization (/Oy).  This
   optimization is enabled at /O1 and /O2.
 - There too many interface and file format changes to list here.

http://groups.google.com/group/airbag-dev/browse_thread/thread/85ce85bfa8457ece


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@42 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
mmentovai 2006-10-20 01:46:38 +00:00
parent 5afd60b067
commit 246f406828
33 changed files with 2643 additions and 1744 deletions
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28
src/processor/stack_frame_info.h
View file

@ -46,13 +46,20 @@ namespace google_airbag {
struct StackFrameInfo {
public:
StackFrameInfo() : valid(false),
enum Validity {
VALID_NONE = 0,
VALID_PARAMETER_SIZE = 1,
VALID_ALL = -1
};
StackFrameInfo() : valid(VALID_NONE),
prolog_size(0),
epilog_size(0),
parameter_size(0),
saved_register_size(0),
local_size(0),
max_stack_size(0),
allocates_base_pointer(0),
program_string() {}
StackFrameInfo(u_int32_t set_prolog_size,
@ -61,18 +68,27 @@ struct StackFrameInfo {
u_int32_t set_saved_register_size,
u_int32_t set_local_size,
u_int32_t set_max_stack_size,
int set_allocates_base_pointer,
const std::string set_program_string)
: valid(true),
: valid(VALID_ALL),
prolog_size(set_prolog_size),
epilog_size(set_epilog_size),
parameter_size(set_parameter_size),
saved_register_size(set_saved_register_size),
local_size(set_local_size),
max_stack_size(set_max_stack_size),
allocates_base_pointer(set_allocates_base_pointer),
program_string(set_program_string) {}
// True when the contents of the structure are valid.
bool valid;
// Clears the StackFrameInfo object so that users will see it as though
// it contains no information.
void Clear() { valid = VALID_NONE; program_string.erase(); }
// Identifies which fields in the structure are valid. This is of
// type Validity, but it is defined as an int because it's not
// possible to OR values into an enumerated type. Users must check
// this field before using any other.
int valid;
// These values come from IDiaFrameData.
u_int32_t prolog_size;
@ -81,6 +97,10 @@ struct StackFrameInfo {
u_int32_t saved_register_size;
u_int32_t local_size;
u_int32_t max_stack_size;
// Only one of allocates_base_pointer or program_string will be valid.
// If program_string is empty, use allocates_base_pointer.
bool allocates_base_pointer;
std::string program_string;
};