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[Tinycc-devel] Modifying a char pointer initialized by character string

From: 瞿兴
Subject: [Tinycc-devel] Modifying a char pointer initialized by character string literal should cause an error.
Date: Fri, 27 Dec 2019 22:26:24 +0800 (GMT+08:00)


In section 6.7.8 of the C99 draft document defines :

If an attempt is made to use pointer variable p to modify the contents of the array, the behavior is undefined. 

When executing the testcase(in the attachment), tinyc does not report an error and modify the value of the variable NISLParameter0 successfully while other compilers such as gcc and clang report a runtime error: “Segmentation fault”. I think it would be better for tinyc to throw an error or at least a warning for the wrong action.


The OS is:

Linux version 4.15.0-65-generic


Compiler Version:

tcc version 0.9.27 (x86_64 Linux)






Expected output:

Throw an error or at least a warning.


The attachment includes the relevant testcase. Looking forward to your reply.

Attachment: testcase.c
Description: Text document

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