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Omit FETCH_THIS in closures
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Non-static closures are guaranteed to have $this. The existing comment
highlights this, but fails to handle it correctly.

Closes phpGH-14181
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@iluuu1994
iluuu1994 committed May 16, 2024
1 parent 5e7baaa commit 600d591
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Showing 6 changed files with 69 additions and 19 deletions.
26 changes: 19 additions & 7 deletions Zend/zend_compile.c
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Original file line number Diff line number Diff line change
Expand Up @@ -313,9 +313,11 @@ static bool zend_is_not_imported(zend_string *name) {
return !FC(imports) || zend_hash_find_ptr_lc(FC(imports), name) == NULL;
}

void zend_oparray_context_begin(zend_oparray_context *prev_context) /* {{{ */
void zend_oparray_context_begin(zend_oparray_context *prev_context, zend_op_array *op_array) /* {{{ */
{
*prev_context = CG(context);
CG(context).prev = CG(context).op_array ? prev_context : NULL;
CG(context).op_array = op_array;
CG(context).opcodes_size = INITIAL_OP_ARRAY_SIZE;
CG(context).vars_size = 0;
CG(context).literals_size = 0;
Expand Down Expand Up @@ -2920,11 +2922,21 @@ static bool is_global_var_fetch(zend_ast *ast)

static bool this_guaranteed_exists(void) /* {{{ */
{
zend_op_array *op_array = CG(active_op_array);
/* Instance methods always have a $this.
* This also includes closures that have a scope and use $this. */
return op_array->scope != NULL
&& (op_array->fn_flags & ZEND_ACC_STATIC) == 0;
zend_oparray_context *ctx = &CG(context);
while (ctx) {
/* Instance methods always have a $this.
* This also includes closures that have a scope and use $this. */
zend_op_array *op_array = ctx->op_array;
if (op_array->fn_flags & ZEND_ACC_STATIC) {
return false;
} else if (op_array->scope) {
return true;
} else if (!(op_array->fn_flags & ZEND_ACC_CLOSURE)) {
return false;
}
ctx = ctx->prev;
}
return false;
}
/* }}} */

Expand Down Expand Up @@ -7869,7 +7881,7 @@ static void zend_compile_func_decl(znode *result, zend_ast *ast, bool toplevel)
op_array->fn_flags |= ZEND_ACC_TOP_LEVEL;
}

zend_oparray_context_begin(&orig_oparray_context);
zend_oparray_context_begin(&orig_oparray_context, op_array);

{
/* Push a separator to the loop variable stack */
Expand Down
4 changes: 3 additions & 1 deletion Zend/zend_compile.h
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Original file line number Diff line number Diff line change
Expand Up @@ -190,6 +190,8 @@ typedef struct _zend_live_range {

/* Compilation context that is different for each op array. */
typedef struct _zend_oparray_context {
struct _zend_oparray_context *prev;
zend_op_array *op_array;
uint32_t opcodes_size;
int vars_size;
int literals_size;
Expand Down Expand Up @@ -802,7 +804,7 @@ void init_compiler(void);
void shutdown_compiler(void);
void zend_init_compiler_data_structures(void);

void zend_oparray_context_begin(zend_oparray_context *prev_context);
void zend_oparray_context_begin(zend_oparray_context *prev_context, zend_op_array *op_array);
void zend_oparray_context_end(zend_oparray_context *prev_context);
void zend_file_context_begin(zend_file_context *prev_context);
void zend_file_context_end(zend_file_context *prev_context);
Expand Down
2 changes: 1 addition & 1 deletion Zend/zend_language_scanner.l
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Original file line number Diff line number Diff line change
Expand Up @@ -614,7 +614,7 @@ static zend_op_array *zend_compile(int type)
}

zend_file_context_begin(&original_file_context);
zend_oparray_context_begin(&original_oparray_context);
zend_oparray_context_begin(&original_oparray_context, op_array);
zend_compile_top_stmt(CG(ast));
CG(zend_lineno) = last_lineno;
zend_emit_final_return(type == ZEND_USER_FUNCTION);
Expand Down
25 changes: 20 additions & 5 deletions ext/opcache/jit/zend_jit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1742,7 +1742,10 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -1790,7 +1793,10 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -1831,7 +1837,10 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -2305,7 +2314,10 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
op1_addr = 0;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
on_this = 1;
} else {
op1_info = OP1_INFO();
Expand Down Expand Up @@ -2456,7 +2468,10 @@ static int zend_jit(const zend_op_array *op_array, zend_ssa *ssa, const zend_op
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
op1_addr = 0;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
on_this = 1;
} else {
op1_info = OP1_INFO();
Expand Down
25 changes: 20 additions & 5 deletions ext/opcache/jit/zend_jit_trace.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4692,7 +4692,10 @@ static const void *zend_jit_trace(zend_jit_trace_rec *trace_buffer, uint32_t par
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -4783,7 +4786,10 @@ static const void *zend_jit_trace(zend_jit_trace_rec *trace_buffer, uint32_t par
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -4863,7 +4869,10 @@ static const void *zend_jit_trace(zend_jit_trace_rec *trace_buffer, uint32_t par
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -5930,7 +5939,10 @@ static const void *zend_jit_trace(zend_jit_trace_rec *trace_buffer, uint32_t par
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down Expand Up @@ -6209,7 +6221,10 @@ static const void *zend_jit_trace(zend_jit_trace_rec *trace_buffer, uint32_t par
if (opline->op1_type == IS_UNUSED) {
op1_info = MAY_BE_OBJECT|MAY_BE_RC1|MAY_BE_RCN;
ce = op_array->scope;
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
/* scope is NULL for closures. */
if (ce) {
ce_is_instanceof = (ce->ce_flags & ZEND_ACC_FINAL) != 0;
}
op1_addr = 0;
on_this = 1;
} else {
Expand Down
6 changes: 6 additions & 0 deletions ext/opcache/jit/zend_jit_vm_helpers.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -692,6 +692,12 @@ zend_jit_trace_stop ZEND_FASTCALL zend_jit_trace_execute(zend_execute_data *ex,
}
}
op1_type |= flags;
} else if (opline->op1_type == IS_UNUSED && (op_array->fn_flags & ZEND_ACC_CLOSURE)) {
uint32_t op1_flags = ZEND_VM_OP1_FLAGS(zend_get_opcode_flags(opline->opcode));
if ((op1_flags & ZEND_VM_OP_MASK) == ZEND_VM_OP_THIS) {
op1_type = IS_OBJECT;
ce1 = Z_OBJCE(EX(This));
}
}
if (opline->op2_type & (IS_TMP_VAR|IS_VAR|IS_CV)
&& opline->opcode != ZEND_INSTANCEOF
Expand Down

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