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detect stack overflows

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CPunch
2021-01-01 19:20:24 -06:00
parent 84f7895684
commit 509823e1bc
4 changed files with 49 additions and 28 deletions
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31
src/cstate.h
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@@ -33,6 +33,9 @@ typedef struct ArrayCObj {
typedef struct CState {
bool panic;
int freezeGC; // when > 0, GC events will be ignored (for internal use)
int frameCount;
CObjObject *protoObj; // start met obj for all objects (NULL by default)
CObj *objects; // tracks all of our allocated objects
CObj *userRoots; // user definable roots, this holds CObjs that should be considered "roots", lets the VM know you are holding a reference to a CObj in your code
ArrayCObj grayStack; // keeps track of which objects *haven't yet* been traversed in our GC, but *have been* found
@@ -44,12 +47,9 @@ typedef struct CState {
CTable globals;
CValue *top; // top of the stack
CValue stack[STACK_MAX]; // stack
CCallFrame callFrame[FRAME_MAX]; // call frames
int frameCount;
CObjString *iStrings[ISTRING_MAX]; // strings used internally by the VM, eg. __init, __index & friends
CObjObject *protoObj; // start met obj for all objects (NULL by default)
CCallFrame callFrame[FRAME_MAX]; // call frames
CValue stack[STACK_MAX]; // stack
} CState;
COSMO_API CState *cosmoV_newState();
@@ -58,25 +58,4 @@ COSMO_API void cosmoV_register(CState *state, int pairs);
COSMO_API void cosmoV_freeState(CState *state);
COSMO_API void cosmoV_printStack(CState *state);
// pushes value to the stack
static inline void cosmoV_pushValue(CState *state, CValue val) {
*(state->top++) = val;
}
// sets stack->top to stack->top - indx
static inline StkPtr cosmoV_setTop(CState *state, int indx) {
state->top -= indx;
return state->top;
}
// returns stack->top - indx - 1
static inline StkPtr cosmoV_getTop(CState *state, int indx) {
return &state->top[-(indx + 1)];
}
// pops 1 value off the stack
static inline StkPtr cosmoV_pop(CState *state) {
return cosmoV_setTop(state, 1);
}
#endif