Mark all the implied Varnode objects, which will have no explicit token in the output. More...
#include <coreaction.hh>
Classes | |
| struct | DescTreeElement |
| This class holds a single entry in a stack used to forward traverse Varnode expressions. More... | |
Public Member Functions | |
| ActionMarkImplied (const string &g) | |
| Constructor. | |
| virtual Action * | clone (const ActionGroupList &grouplist) const |
| Clone the Action. More... | |
| virtual int4 | apply (Funcdata &data) |
| Make a single attempt to apply this Action. More... | |
 Public Member Functions inherited from Action | |
| Action (uint4 f, const string &nm, const string &g) | |
| Base constructor for an Action. More... | |
| virtual | ~Action (void) |
| Destructor. | |
| virtual void | printStatistics (ostream &s) const |
| Dump statistics to stream. More... | |
| int4 | perform (Funcdata &data) |
| Perform this action (if necessary) More... | |
| bool | setBreakPoint (uint4 tp, const string &specify) |
| Set a breakpoint on this action. More... | |
| bool | setWarning (bool val, const string &specify) |
| Set a warning on this action. More... | |
| bool | disableRule (const string &specify) |
| Disable a specific Rule within this. More... | |
| bool | enableRule (const string &specify) |
| Enable a specific Rule within this. More... | |
| const string & | getName (void) const |
| Get the Action's name. | |
| const string & | getGroup (void) const |
| Get the Action's group. | |
| uint4 | getStatus (void) const |
| Get the current status of this Action. | |
| uint4 | getNumTests (void) |
| Get the number of times apply() was invoked. | |
| uint4 | getNumApply (void) |
| virtual void | reset (Funcdata &data) |
| Reset the Action for a new function. More... | |
| virtual void | resetStats (void) |
| Reset all the counts to zero. More... | |
| virtual int4 | print (ostream &s, int4 num, int4 depth) const |
| Print a description of this Action to stream. More... | |
| virtual void | printState (ostream &s) const |
| Print status to stream. More... | |
| virtual void | saveXml (ostream &s) const |
| Save specifics of this action to stream. | |
| virtual void | restoreXml (const Element *el, Funcdata *fd) |
| Load specifics of action from XML. | |
| virtual Action * | getSubAction (const string &specify) |
| Retrieve a specific sub-action by name. More... | |
| virtual Rule * | getSubRule (const string &specify) |
| Retrieve a specific sub-rule by name. More... | |
Static Private Member Functions | |
| static bool | isPossibleAliasStep (Varnode *vn1, Varnode *vn2) |
| Check for additive relationship. More... | |
| static bool | isPossibleAlias (Varnode *vn1, Varnode *vn2, int4 depth) |
| Check for possible duplicate value. More... | |
| static bool | checkImpliedCover (Funcdata &data, Varnode *vn) |
| Check for cover violation if Varnode is implied. More... | |
Additional Inherited Members | |
| Public Types inherited from Action | |
| enum | ruleflags { rule_repeatapply = 4, rule_onceperfunc = 8, rule_oneactperfunc = 16, rule_debug = 32, rule_warnings_on = 64, rule_warnings_given = 128 } |
| Boolean behavior properties governing this particular Action. More... | |
| enum | statusflags { status_start =1, status_breakstarthit =2, status_repeat =4, status_mid =8, status_end =16, status_actionbreak =32 } |
| Boolean properties describing the status of an action. More... | |
| enum | breakflags { break_start = 1, tmpbreak_start = 2, break_action = 4, tmpbreak_action = 8 } |
| Break points associated with an Action. More... | |
| Protected Member Functions inherited from Action | |
| void | issueWarning (Architecture *glb) |
| Warn that this Action has applied. More... | |
| bool | checkStartBreak (void) |
| Check start breakpoint. More... | |
| bool | checkActionBreak (void) |
| Check action breakpoint. More... | |
| void | turnOnWarnings (void) |
| Enable warnings for this Action. | |
| void | turnOffWarnings (void) |
| Disable warnings for this Action. | |
| Protected Attributes inherited from Action | |
| int4 | lcount |
| Changes not including last call to apply() | |
| int4 | count |
| Number of changes made by this action so far. | |
| uint4 | status |
| Current status. | |
| uint4 | breakpoint |
| Breakpoint properties. | |
| uint4 | flags |
| Behavior properties. | |
| uint4 | count_tests |
| Number of times apply() has been called. | |
| uint4 | count_apply |
| Number of times apply() made changes. | |
| string | name |
| Name of the action. | |
| string | basegroup |
| Base group this action belongs to. | |
Detailed Description
Mark all the implied Varnode objects, which will have no explicit token in the output.
Member Function Documentation
◆ apply()
|
virtual |
Make a single attempt to apply this Action.
This is the main entry point for applying changes to a function that are specific to this Action. The method can inspect whatever it wants to decide if the Action does or does not apply. Changes are indicated by incrementing the count field.
- Parameters
-
data is the function to inspect/modify
- Returns
- 0 for a complete application, -1 for a partial completion (due to breakpoint)
Implements Action.
References Funcdata::beginLoc(), Action::count, Varnode::endDescend(), Funcdata::endLoc(), Varnode::getDef(), Varnode::getHigh(), PcodeOp::getIn(), Funcdata::getMerge(), Varnode::hasCover(), Merge::inflate(), Varnode::isExplicit(), Varnode::isFree(), Varnode::isImplied(), PcodeOp::numInput(), Varnode::setExplicit(), and Varnode::setImplied().
◆ checkImpliedCover()
Check for cover violation if Varnode is implied.
Marking a Varnode as implied causes the input Varnodes to its defining op to propagate farther in the output. This may cause eventual variables to hold different values at the same point in the code. Any input must test that its propagated Cover doesn't intersect its current Cover.
- Parameters
-
data is the function being analyzed vn is the given Varnode
- Returns
- true if there is a Cover violation
References Funcdata::beginOp(), PcodeOp::code(), Cover::contain(), CPUI_LOAD, CPUI_STORE, Funcdata::endOp(), Funcdata::getCallSpecs(), Varnode::getCover(), Varnode::getDef(), Varnode::getHigh(), PcodeOp::getIn(), Funcdata::getMerge(), Varnode::getOffset(), FuncCallSpecs::getOp(), Merge::inflateTest(), PcodeOp::isCall(), Varnode::isConstant(), PcodeOp::isDead(), Funcdata::numCalls(), and PcodeOp::numInput().
◆ clone()
|
inlinevirtual |
Clone the Action.
If this Action is a member of one of the groups in the grouplist, this returns a clone of the Action, otherwise NULL is returned.
- Parameters
-
grouplist is the list of groups being cloned
- Returns
- the cloned Action or NULL
Implements Action.
References ActionMarkImplied(), ActionGroupList::contains(), and Action::getGroup().
◆ isPossibleAlias()
Check for possible duplicate value.
Return false only if we can guarantee two Varnodes have different values.
- Returns
- true if its possible the Varnodes hold the same value
References PcodeOp::code(), CPUI_COPY, CPUI_INT_2COMP, CPUI_INT_ADD, CPUI_INT_NEGATE, CPUI_INT_SEXT, CPUI_INT_ZEXT, CPUI_PTRADD, CPUI_PTRSUB, functionalEquality(), Varnode::getDef(), PcodeOp::getIn(), Varnode::getOffset(), Varnode::isConstant(), and Varnode::isWritten().
◆ isPossibleAliasStep()
Check for additive relationship.
Return false only if one Varnode is obtained by adding non-zero thing to another Varnode. The order of the Varnodes is not important.
- Returns
- false if the additive relationship holds
References PcodeOp::code(), CPUI_INT_ADD, CPUI_INT_XOR, CPUI_PTRADD, CPUI_PTRSUB, Varnode::getDef(), PcodeOp::getIn(), Varnode::isConstant(), and Varnode::isWritten().
The documentation for this class was generated from the following files:
- coreaction.hh
- coreaction.cc
