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closes bpo-39605: Fix some casts to not cast away const. (GH-18453)

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gcc -Wcast-qual turns up a number of instances of casting away constness of pointers. Some of these can be safely modified, by either:

Adding the const to the type cast, as in:

-    return _PyUnicode_FromUCS1((unsigned char*)s, size);
+    return _PyUnicode_FromUCS1((const unsigned char*)s, size);

or, Removing the cast entirely, because it's not necessary (but probably was at one time), as in:

-    PyDTrace_FUNCTION_ENTRY((char *)filename, (char *)funcname, lineno);
+    PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);

These changes will not change code, but they will make it much easier to check for errors in consts
This commit is contained in:
Andy Lester 2020-02-11 20:28:35 -06:00 • committed by GitHub
parent 029e8401b7
commit e6be9b59a9
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 39 additions and 39 deletions
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Python/ceval.c
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@ -5440,7 +5440,7 @@ dtrace_function_entry(PyFrameObject *f)
funcname = PyUnicode_AsUTF8(f->f_code->co_name);
lineno = PyCode_Addr2Line(f->f_code, f->f_lasti);
PyDTrace_FUNCTION_ENTRY((char *)filename, (char *)funcname, lineno);
PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);
}
static void
@ -5454,7 +5454,7 @@ dtrace_function_return(PyFrameObject *f)
funcname = PyUnicode_AsUTF8(f->f_code->co_name);
lineno = PyCode_Addr2Line(f->f_code, f->f_lasti);
PyDTrace_FUNCTION_RETURN((char *)filename, (char *)funcname, lineno);
PyDTrace_FUNCTION_RETURN(filename, funcname, lineno);
}
/* DTrace equivalent of maybe_call_line_trace. */
@ -5486,7 +5486,7 @@ maybe_dtrace_line(PyFrameObject *frame,
co_name = PyUnicode_AsUTF8(frame->f_code->co_name);
if (!co_name)
co_name = "?";
PyDTrace_LINE((char *)co_filename, (char *)co_name, line);
PyDTrace_LINE(co_filename, co_name, line);
}
*instr_prev = frame->f_lasti;
}