Good point. And the explicit is always better. A string literal is not necessarily a null-terminated character sequence: if a string literal has embedded null characters, it represents an array which contains more than one string. PasswordAuthentication no, but I can still login by password. In C++, the char type is const qualified, in C it is not. Before returning, it updates the *StartToken to the TokNo of the token being found and sets *StartTokenByteOffset to the byte offset of the token in the string. FirstStartColumn is where this line starts. getNumConcatenated - Get the number of string literal tokens that were concatenated in translation phase #6 to form this string literal. Referenced by getLocationOfByte(), isOrdinary(), IsStringInit(), isUTF16(), isUTF32(), isUTF8(), isWide(), outputString(), and clang::ASTNodeImporter::VisitStringLiteral(). Also, consider another possible use-case of formatting SQL raw string literals, for example. const char* p = "abc\0def"; // std::strlen (p) == 3, but the array has size 8 What's the performance difference without the cache? Simple constructor for string literals made from one token. [clang-format] Do not break Objective-C string literals inside array literals Classify - Classify this expression according to the C++11 expression taxonomy. This formatting string has caused bugs and vulnerabilities many times that clang decides to warn. It's still work in progress, however feedback is welcome. Skip past any parentheses which might surround this expression until reaching a fixed point. Skip past any parentheses and casts which might surround this expression until reaching a fixed point. Naively, I tried to: return vasprintf (bufptr, reinterpret_cast<const char []> (fmt), ap); Which of course doesn't compile. Returns whether this expression has a placeholder type. The style used for all options not specifically set in the . I was wrong. Referenced by clang::Sema::ActOnStringLiteral(), getByteLength(), getCodeUnit(), clang::CodeGen::CodeGenModule::GetConstantArrayFromStringLiteral(), and outputString(). Definition at line 1206 of file Expr.cpp. LS_Auto), and as a value usable in the configuration (without a prefix: Auto). Referenced by clang::GCCAsmStmt::AnalyzeAsmString(), and clang::Sema::getLocationOfStringLiteralByte(). Basically a raw string literal is a string in which the escape characters (like \n \t or \" ) of C++ are not processed. Determine whether an lvalue-to-rvalue conversion should implicitly be applied to this expression if it appears as a discarded-value expression in C++11 onwards. With Clang/LLVM as well as GCC I'm getting the following errors: The text was updated successfully, but these errors were encountered: You can change loggedStep(tag) { into loggedStep("%s", tag){ and try to rebuild. the c++ standard's committee study group 16 - unicode approved a paper that is currently undergoing lewg to determine the string literal and wide string literal encoding at both compile-time and runtime; this patch prepares for the compile-time portion of that detection, which corentin jabot already created a proof-of-concept of for clang, gcc https://clang.llvm.org/extra/clang-tidy/checks/modernize-raw-string-literal.html. That would be the other option. Why? See the description of the Language option below for the list of supported languages. The optimizing formatter can compute the penalty. Similar to printf. . BasedOnStyle (string). As err_doit takes already a va_list, you should specify the format on the functions that call it, too. isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, does not have an incomplete type, does not have a const-qualified type, and if it is a structure or union, does not have any member (including, recursively, any member or element of all contained aggregates or unions) with a const-qualified type. getValueKindForType - Given a formal return or parameter type, give its value kind. Whether this expression is instantiation-dependent, meaning that it depends in some way on. If you don't have clang and libc++ on your machine you could also compile the . It won't protect for instance indirect call done with a more classical function pointer. Returns true if this expression is a bound member function. Sean could you post the precise warnings you are getting while compiling dear imgui or the demo? @AnandSonawane: Gcc's and Clang's attributes can provide further information to the compiler.In this case, it will communicate to users of the function that a printf-like syntax is used and therefore will warn about format mismatches. Multiple ranges can be formatted by specifying several -lines arguments. Moreover, I see your point that caching makes it in some way easier to see that we are doing the exact same thing in the second phase. Referenced by getEndLoc(), and clang::ASTNodeImporter::VisitStringLiteral(). #include "clang/AST/Expr.h" Inheritance diagram for clang::StringLiteral: [ legend] Collaboration diagram for clang::StringLiteral: [ legend] Detailed Description StringLiteral - This represents a string literal expression, e.g. Switching the implementation to a BreakableToken would eliminate the need of the cache, since the edits will be stored in the BreakableToken itself. I don't understand the "if it is a newline" part. The .clang-format file uses YAML format: key1: value1 key2: value2 # A comment. The raw string formatting introduces the ability to format a piece of code as if it's first line started at FirstStartColumn, and this new parameter needs to be propagated appropriately where it matters. Definition at line 1313 of file Expr.cpp. Added a description for estimatedPenalty. I can't come up with an example. Also try to find some "worst case" scenarios, where you think you have an example that would benefit the most from the caching and measure that - that often gives a good upper bound. I understand that without the cache it's going to be evaluated twice. Well occasionally send you account related emails. (2) is an interesting argument. I think it's because of Clang's behaviour. A raw string with a matching delimiter or a matching enclosing function name will be reformatted assuming the specified language based on the style for that language defined in the .clang-format file. Determine whether the result of this expression is a temporary object of the given class type. Here's some problems with getting the penalty from the recursive step: How can the State take care of this? EvaluateWithSubstitution - Evaluate an expression as if from the context of a call to the given function with the given arguments, inside an unevaluated context. Thanks for contributing an answer to Stack Overflow! @djasper, @klimek: what's your opinion about this decision? If you just want to print the imp without formatting, you should use fputs (imp, fil) (note the reversed arguments). References getCharByteWidth(), and getLength(). "the column at which the last line of \p Code should end". does not produce warnings with g++ but with clang++ (version 3.8) I have: Should I wrote like ImGui::Text("%s", name.c_str()); The text was updated successfully, but these errors were encountered: Yes: You can also use TextUnformatted(name.c_str()); which will be faster. Using these two parameters can reduce the time complexity from O(n^2) to O(n) if one wants to get the location of byte for all the tokens in a string. I explored this approach initially. Well occasionally send you account related emails. Could you fix the following warning and other places that use bi_errorf(Tbadsubst) or internal_errorf(Tbadsubst)? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Formatting functions such as fmt::format () and fmt::print () use the same format string syntax described in this section. I'm still really confused :). Why is this? The first mistake he says that it would be nice to explicitly set the formatting string as a literal, and not a variable, since a variable can be accidentally changed or replaced by someone. constexpr const char* foo() { return "%s %d"; } Dumps the specified AST fragment and all subtrees to. Referenced by clang::ODRDiagsEmitter::diagnoseMismatch(), getAsmSrcLocInfo(), and getClobberConflictLocation(). Returns whether this expression refers to a vector element. Referenced by getLocationOfByte(), getStrTokenLoc(), tokloc_end(), and clang::ASTNodeImporter::VisitStringLiteral(). EvaluateAsFloat - Return true if this is a constant which we can fold and convert to a fixed point value. By clicking Sign up for GitHub, you agree to our terms of service and Thank you! Returns whether this expression has a specific placeholder type. isKnownToHaveBooleanValue - Return true if this is an integer expression that is known to return 0 or 1. Determines whether the type of this expression depends on. Answer: Actually, clang swears at something completely different. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. privacy statement. isConstantInitializer - Returns true if this expression can be emitted to IR as a constant, and thus can be used as a constant initializer in C. If this expression is an unambiguous reference to a single declaration, in the style of __builtin_function_start, return that declaration. EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded integer. StringLiteral is followed by several trailing objects. Returns whether this expression refers to a global register variable. Security: Format string is not a string literal - Rebuild of the Debian archive with clang Rebuild of the Debian archive with clang "Security: Format string is not a string literal" build failure (s) clang 3.6.0 Return to the list The following code builds without any issue with gcc and fails with clang: "specifies the column at which the first line of \p Code starts". Determines whether the value of this expression depends on. Skip past any implicit casts which might surround this expression until reaching a fixed point. Referenced by clang::Sema::ActOnGCCAsmStmt(), and clang::analyze_os_log::computeOSLogBufferLayout(). Anything that is not contained in braces is considered literal text, which is copied unchanged to the output. As such, I would argue that the cache increases maintainability. uint32_t clang::StringLiteral::getCodeUnit, StringRef clang::StringLiteral::getString, A single unsigned storing the length in characters of this string. OFC as workaround I can use GCC but Mandriva is a distro where we trying to build all packages with Clang and LTO by default and would be nice to compile budgie-screensaver also with Clang without GCC workarounds. Full build log: https://file-store.openmandriva.org/api/v1/file_stores/59d222d28f927b0d34b118e7340b7736b0982c5e.log?show=true. The cache adds ~4% performance improvement on a bunch of real-world examples. The *StartToken sets the first token to be searched in this function and the *StartTokenByteOffset is the byte offset of the first token. If no style has been defined in the .clang-format file for the specific language, a predefined style given by 'BasedOnStyle' is used. Skip past any invisble AST nodes which might surround this statement, such as. So the surrounding formatting code needs to inform the raw string formatting code about the context in which the formatting occurs, which is achieved by passing the newly introduced FirstStartColumn, NextStartColumn and LastStartColumn parameters. CGAC2022 Day 5: Preparing an advent calendar. isCXX11ConstantExpr - Return true if this expression is a constant expression in C++11. At the same time ensuring that caching is correct might be hard to maintain. I'll refine the information about this new option with a set of rules that roughly determine the indentation decisions taken. Skip past any parentheses and lvalue casts which might surround this expression until reaching a fixed point. See the description of the Language option below for the list of supported languages. When compiling budgie-screensaver 4.0 for OpenMandriva Cooker with LLVM/Clang 12 and LTO enabled I see build errors. To enable it, you need to pass /w14774 or /Wall, after which you will get: Determine whether this expression involves a call to any function that is not trivial. Editor placeholders are produced by the code-completion engine and are represented as characters between '<#' and '#>' in the source code. Which is why I'm curious how much difference in runtime this actually makes (we usually dry-run a bazillion of states and then apply only one, so the dry- vs. non-dry-run runtime usually doesn't matter). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Thanks :) This worked for me but according to the explanation in the documentation that i linked in your answer the correct way is. When compiling budgie-screensaver 4.0 for OpenMandriva Cooker with LLVM/Clang 12 and LTO enabled I see build errors. Whether this expression contains an unexpanded parameter pack (for C++11 variadic templates). (. ) Examples to String Literals for Strings Definitions str="abcd"; default string based on compiler/IDE options. I closed it just to keep a note about the problem, as I didn't find a solution at the time. For example it could be: informativeTextWithFormat "x = %d, y = %d", x, y So the format string should be a string literal, to allow the compiler to check it. After all, the format string corresponds to the prototype. More StringLiteral - This represents a string literal expression, e.g. This is the "fully general" constructor that allows representation of strings formed from multiple concatenated tokens. FirstIndent is the expected indent of the first token of the unwrapped line, which gets propagated, for example, in line breaks. Find centralized, trusted content and collaborate around the technologies you use most. What should I do when my company overstates my experience to prospective clients? We want to save the edits to the raw string text so that we don't call reformat again in non-dry-run-mode. dumpPretty/printPretty - These two methods do a "pretty print" of the AST back to its original source language syntax. For further guidance on setting up editor integration, see these pages: Atom; Vim & Emacs The first mistake he says is that it would be nice to explicitly set the formatting string as a literal, not a variable, since someone can accidentally change or replace a variable. (If that's the case, please document it :). I moved the implementation to breakProtrudingToken, but that doesn't eliminate the need for the cache. This checks whether the format string is a literal on the calling function. Skip past any implicit AST nodes which might surround this expression until reaching a fixed point. In the second line he says that it is prettier to write this construction like this, But sometimes it's better to write right away. E.g. 1 comment Contributor craigsapp commented on Dec 18, 2016 craigsapp added the style label on Dec 18, 2016 craigsapp on Dec 18, 2016 craigsapp closed this on Dec 18, 2016 If this expression refers to a bit-field, retrieve the declaration of that bit-field. The additional 2 column relative indent of key comes from the IndentWidth of the inner format style. Referenced by clang::analyze_os_log::computeOSLogBufferLayout(). "foo" or L"bar" (wide strings). All reactions. setValueKind - Set the value kind produced by this expression. Conceptually, there might be different State-s having the same FormattedRawStringCacheKey, where the edits could be reused. Definition at line 1195 of file Expr.cpp. Referenced by isIdenticalStmt(), and clang::ASTNodeImporter::VisitStringLiteral(). Thx ! Copy link Author. Clang (3.6.0), complains with "format string is not a string literal", referring to the fmt argument that is being forwarded. Strings in C can also be truncated and extended by assigning into arrays, e.g. Sign in Already on GitHub? I agree that the performance gain aren't worth the additional effort here. Consider the following formatted code (with column limit 20): This is parsed as a single unwrapped line, like auto s = R"pb()pb"; with a single value of FirstIndent: 0. clang-format doesn't understand how to format these and . Get the inner expression that determines the best dynamic class. This repository has been archived by the owner before Nov 9, 2022. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. GCC: why a -Wformat warning for this fprintf? "Friends, Romans, Countrymen": A Translation Problem from Shakespeare's "Julius Caesar", How to get the result of smbstatus into a shell script variable. According to the standard, the printf function has a prototype: int printf(const char *restrict format, ); Why does this error occur? shell.c:89:20: warning: format not a string literal and no format arguments [-Wformat-security] printf (readbuffer); He is using the gcc/clang version from 16.04 LTS release. const. inline. The situation with raw string literals is a bit different. Strings are amazingly complex. Traditional preprocessors only considered a line to be a directive if the '#' appeared in column 1 on the line. setObjectKind - Set the object kind produced by this expression. Hah, I was building this one with GCC before and as always the error messages there suck. EvaluateAsFloat - Return true if this is a constant which we can fold and convert to a floating point value, using any crazy technique that we want to. Definition at line 1184 of file Expr.cpp. str=u8abcd"; a UTF-8 string literal and is initialized with the given characters as encoded in UTF-8, including the null terminator str=u"abcd"; a char16_t string literal. histrap.c:220:15: error: format string is not a string . Moved to a new internal header FormatInternal.h and added documentation. Also, this should probably go into an internal namespace somewhere below all the public interfaces? "Security: Format string is not a string literal" build failure (s) clang 3.3 Return to the list The following code builds without any issue with gcc and fails with clang: #include <stdio.h> void foo (void) { char buffer [1024]; sprintf (buffer, "%n", 2); } gcc -Werror -c foo.c clang -Werror -c foo.c We would need a cache to prevent computing the same breaks in various paths of the combinatorial formatting, but I haven't studied the code enough to know whether we have this separately yet. Not the answer you're looking for? This function-like macro is available in C++20 by default, and is provided as an extension in earlier language standards. Each concrete expr subclass is expected to compute its dependence and call this in the constructor. Wait wait :) I'm not arguing it needs to be using the same implementation. You signed in with another tab or window. "Security: Format string is not a string literal" build failure (s) clang 3.1 Return to the list The following code builds without any issue with gcc and fails with clang: #include <stdio.h> void foo ( void) { char buffer [ 1024 ]; sprintf (buffer, "%n", 2 ); } gcc -Werror -c foo.c clang -Werror -c foo.c Referenced by getBytes(), and getString(). "and at which column the fragment's last line should end". fprintf, error: format not a string literal and no format arguments [-Werror=format-security; snprintf - format not a string literal and no format arguments warning; FreeWRL, "format not a string literal and no format arguments" c array - warning: format not a string literal; Error: format string is not a string literal Problem is related to. ocornut changed the title clang warnings Clang warnings "format string is not a string literal" Dec 3, 2018. I mean, that's a string literal, just not a raw string literal :) I'm wondering why the tokanizer doesn't have to make that distinction. ClassifyModifiable - Classify this expression according to the C++11 expression taxonomy, and see if it is valid on the left side of an assignment. hasAnyTypeDependentArguments - Determines if any of the expressions in Exprs is type-dependent. Referenced by clang::Sema::ActOnNumericConstant(), clang::Sema::ActOnStringLiteral(), clang::Sema::BuildPredefinedExpr(), Create(), clang::ASTContext::getPredefinedStringLiteralFromCache(), and clang::ASTNodeImporter::VisitStringLiteral(). In this case, the runtime will try to access a non-existent argument to match the %s. I would guess that it's just the result of the Clang static analyzer. Issue https://github.com/llvm/llvm-project/issues/55805 mentiond two compile-time string cases. isCXX98IntegralConstantExpr - Return true if this expression is an integral constant expression in C++98. The configuration file can consist of several sections each having different Language: parameter denoting the programming language this section of the configuration is targeted at. If you want to keep the code compiler independent, you should wrap the attributes in a macro that hides it for compilers that don't know attributes. The warning you are getting is the compiler warning you that there could be a format specifier in the string. Replace specific values in Julia Dataframe column with random value, When does money become money? Worth to add when I switch to GCC then all compiling fine. Whether this expression contains subexpressions which had errors, e.g. The text was updated successfully, but these errors were encountered: @lpugin: I posted the problem here about raw literal strings not being formatted correctly with clang-format. Check the buffer size passed to snprintf. I'd like to fix that tomorrow. Returns whether this expression refers to a matrix element. How could an animal have a truly unidirectional respiratory system? so obviously there is a way to get clang-format to format R"(xxx)" correctly You signed in with another tab or window. brasero-misc.c:97:3: error: format string is not a string literal [-Werror,-Wformat-nonliteral], src/cheese-window.c:871:162: error: format string is not a string literal [-Werror,-Wformat-nonliteral], runstat.c:79:31: error: format string is not a string literal [-Werror,-Wformat-nonliteral], express.c:523:21: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], ephy-sqlite-connection.c:63:56: error: format string is not a string literal [-Werror,-Wformat-nonliteral], dviread.c:179:19: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gengtype-lex.l:594:31: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], gedit-commands-file.c:633:9: error: format string is not a string literal [-Werror,-Wformat-nonliteral], chartable.c:189:28: error: format string is not a string literal [-Werror,-Wformat-nonliteral], ./base/gsdevice.c:1010:25: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], gitg-debug.c:66:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], glade-editor-property.c:2726:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gtlsconnection-gnutls.c:778:20: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gfileutils.c:1023:16: error: format string is not a string literal [-Werror,-Wformat-nonliteral], sound-theme-file-utils.c:193:33: error: format string is not a string literal [-Werror,-Wformat-nonliteral], goakerberosidentity.c:341:39: error: format string is not a string literal [-Werror,-Wformat-nonliteral], panel-applet-frame.c:782:7: error: format string is not a string literal [-Werror,-Wformat-nonliteral], triggerSelectWindow.c:543:182: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], gsm-util.c:366:33: error: format string is not a string literal [-Werror,-Wformat-nonliteral], app/error-info.c:63:33: error: format string is not a string literal [-Werror,-Wformat-nonliteral], modules/tasks.c:100:58: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], grl-log.c:298:31: error: format string is not a string literal [-Werror,-Wformat-nonliteral], grl-jamendo.c:1173:32: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gtr-viewer.c:154:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gnome-gconf-ui.c:187:50: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gsf-libxml.c:980:38: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gxps-images.c:352:34: error: format string is not a string literal [-Werror,-Wformat-nonliteral], soup-logger.c:377:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], evolution.c:339:25: error: format string is not a string literal [-Werror,-Wformat-nonliteral], asprintf.c:35:30: error: format string is not a string literal [-Werror,-Wformat-nonliteral], b-excwho.c:126:15: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], sj-main.c:157:32: error: format string is not a string literal [-Werror,-Wformat-nonliteral], ker/goodies.c:850:30: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], totem-screenshot-plugin.c:283:30: error: format string is not a string literal [-Werror,-Wformat-nonliteral], vinagre/vinagre-bookmarks-ui.c:330:12: error: format string is not a string literal [-Werror,-Wformat-nonliteral], server/libvncserver/main.c:70:22: error: format string is not a string literal [-Werror,-Wformat-nonliteral]. This breaks the abstraction of reformat. Hi everyone, This is really my first time posting and I'm a newcomer to programming. After all, the formatting string matches the prototype. Answer: Actually, clang swears at something completely different. Function attributes are a non-standard extension of gcc, which is also implemented for Clang. This patch adds raw string literal formatting. Given an expression of bound-member type, find the type of the member. I'm wondering if someone can point out what i am doing wrong in the if and for loop with choice 2. References clang::Lexer::AdvanceToTokenCharacter(), getKind(), getNumConcatenated(), clang::StringLiteralParser::getOffsetOfStringByte(), clang::StringLiteralParser::GetStringLength(), getStrTokenLoc(), clang::Lexer::LexFromRawLexer(), Offset, Ordinary, SM, clang::Target, and UTF8. When only a single -offset is specified without -length, clang-format will format up to the end of the file. I mean, that's a string literal, just not a raw string literal :) I'm wondering why the tokanizer doesn't have to make that distinction. Value type is specified for each option. I'll need a bit of refactoring on the test side of things, since old gcc doesn't like raw string literals in macros. And after trying it with Clang I didn't even read them although they are so much better. with constructs like: char X[2] = "foobar"; In this case, getByteLength() will return 6, but the string literal will have type "char[2]". We both used the same compiler flags. Edit: fixed wrong argument index in example). Also, consider another possible use-case of formatting SQL raw string literals, for example. EvaluateAsInitializer - Evaluate an expression as if it were the initializer of the given declaration. HasSideEffects - This routine returns true for all those expressions which have any effect other than producing a value. . Skip past any parenthese and casts which do not change the value (including ptr->int casts of the same size) until reaching a fixed point. I'm thinking of running it over a bunch of real-world source code that does proto processing and noting the runtime. rev2022.12.7.43084. Format String is not a string literal. viewAST - Visualize an AST rooted at this Stmt* using GraphViz. See git-clang-format -h for more details. Can only be used with one input file. In traditional C macro replacement takes place within string literals, but in ISO C it does not. The diagnostic is informative to avoid format string vulnerability. It takes a single argument that is the name of a double-square-bracket-style attribute. The actual string data can be obtained with getBytes() and is NOT null-terminated. Use snprintf instead of sprintf. Disabling the warning altogether is not an option. Returns the set of floating point options that apply to this expression. A raw string literal starts with R"( and ends in )", let's see an in an example the difference between a normal string and a raw string in C++: . Evaluate an expression that is required to be a constant expression. --lines=<string> - <start line>:<end line> - format a range of lines (both 1-based). Maybe we need to rename these and add comments about them? The outer formatter sees this code as: where # signifies the offset where column 0 starts in the raw strings. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. @ocornut, I compiled my project which contains the following code snippet: Compiling with Clang 10 shows this warning: I'm also using Conan to manage external libraries, including ImGUI. I'm just saying it should be at the same spot in the code. The last parameter is a format string, followed by optional parameters. Making statements based on opinion; back them up with references or personal experience. This page: Does an Antimagic Field suppress the ability score increases granted by the Manual or Tome magic items? You can format to a string using std::ostringstream. I'm trying to build otfcc v0.8.4 for NixOS. I did that too already. The second number, which is 0 here, should then be the argument index of the variadic argument, . See also this discussion. I thought that's what FirstIndent means? isPotentialConstantExprUnevaluted - Return true if this expression might be usable in a constant expression in C++11 in an unevaluated context, if it were in function FD marked constexpr. bool clang::Token::isEditorPlaceholder. StringLiteral - This represents a string literal expression, e.g. https://file-store.openmandriva.org/api/v1/file_stores/59d222d28f927b0d34b118e7340b7736b0982c5e.log?show=true. The length of the string data is determined by calling getByteLength(). Yes, I got that "not a string argument" error, too, but forgot to update the post. to your account. EvaluateAsLValue - Evaluate an expression to see if we can fold it to an lvalue with link time known address, with no side-effects. Editor Integration You can also integrate clang-format directly into your favorite editors. Produce a unique representation of the given statement. . The configuration file can consist of several sections each having different Language: parameter denoting the programming language this section of the configuration is targeted at. Switching between GCC and Clang/LLVM using CMake, Platform inconsistencies with vsprintf and va_list, Compatibility of vsnprintf and the macros from inttypes, gcc: mixing -Wformat and register_printf_specifier. What's the benefit of grass versus hardened runways? And it tells the implementation that it's okay to use a format literal here, because, vsprintf and vsnprintf [-Wformat-nonliteral] warning on Clang 5.0, Help us identify new roles for community members, Help needed: a call for volunteer reviewers for the Staging Ground beta test, 2022 Community Moderator Election Results. You signed in with another tab or window. isPotentialConstantExpr - Return true if this function's definition might be usable in a constant expression in C++11, if it were marked constexpr. Does "just a newline" mean "is empty"? If you are working in C++, other safe alternative exist: std::string should be the prefered type to store strings. The problem is that breakProtrudingToken internally assumes that the token has been put on the state (the protruding part) and reformatting conceptually takes place before that. The slight performance overhead can be afforded in a vast majority of projects. localization), so as a compromise we decided to provide this warning as off by default. I went with the simplest approach. I know, that I can make a C-style variadic function and use __attribute__((__format__ (__printf__, x, y))) but I have to keep it in C++ template style. Thank you, it builds fine now. For an expression of class type or pointer to class type, return the most derived class decl the expression is known to refer to. What do I do? Determine whether this expression is a default function argument. getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic expression. I have another point about switching to use the recursive formatting of the penalties: As an example for (2) penalty incompatibility, you could use a style inside the raw strings that has different PenaltyExcessCharacter, for example. You signed in with another tab or window. Referenced by getBeginLoc(), and clang::ASTNodeImporter::VisitStringLiteral(). If the NoLineBreakFormatter is used, then the penalty should be 0 (there should be no line break or column limit violation). getValueKind - The value kind that this expression produces. I'd like to get Daniel's opinion on this point. Skip past any parentheses and derived-to-base casts until reaching a fixed point. Asking for help, clarification, or responding to other answers. Have a question about this project? Consider this formatted code (with column limit 20): This is parsed as two unwrapped lines, one like a = [] {}; and a child line attached to the { token like bbbb = 1;. They can be formed from multiple tokens and can have escape sequences in them in addition to the usual trigraph and escaped newline business. The same thing is true for blocks inside expressions, though - what's the difference? Calculate a unique representation for a statement that is stable across compiler invocations. isIntegerConstantExpr - Return the value if this expression is a valid integer constant expression. If this expression is an l-value for an Objective C property, find the underlying property reference expression. (Disclaimer: I couldn't check this with Clang, but it works for gcc. seems to imply that adding the line: to .clang-format will fix the problem, but it does not fix the problem for me. clang-format doesn't understand how to format these and could possibly only touch the leading indent of the lines. Ok, as for the function itself: It needs a better description of what the estimation does and why. I want to have the warning. If the attribute is supported, a It is now read-only. isLValue - True if this expression is an "l-value" according to the rules of the current language. Why use __attribute__((__format__ (__printf__,) in Clang to avoid format string is not a string literal? As err_doit takes already a va_list, you should specify the format on the functions that call it, too. The inner indent already comes from the style of the inner formatter. You're right. As long as the penalty is applied consistently for every different possibility, and just adds up, won't it still be correct (in selecting the best solution), even if we have totally different excess char penalties? isNullPointerConstant - C99 6.3.2.3p3 - Test if this reduces down to a Null pointer constant. This patch enhances clang's ability to check compile-time determinable string literals as format strings, and can give FixIt hints at literals (unlike gcc). There are two parameters in State that are initialized: State.FirstIndent, which is always initialized as FirstIndent and Stare.Column, which is initialized appropriately. Say for eg "bad%sdata". Would the US East Coast rise if everyone living there moved away? It's such a beautiful font which is why I am preparing a new package for NixOS which allows to easily change the parameters instead of just pulling the TTFs. Can LEGO City Powered Up trains be automated? For example: strcpy(str_a, "%x%x%x%x"); printf(str_a); would be equivalent to: printf("%x%x%x%x"); Are there any workarounds for this problem? Share Unfortunately, always giving a warning when a format string is not a string literal turned out to generate too many warnings on valid use cases (e.g. The C type for a string is always a ConstantArrayType. I think this is ready for another round of reviews. Could you please give me an example or point me to that code? One type mismatch and you got a one-way ticket to Undefined Behavior land (not to mention the dreaded %n specifier that can cause writing to arbitrary memory with a mismatch).. For that reason, GCC and clang will complain if you call printf with a non-literal (and if you call it with a literal . But in fact, the error is caused by -Werror , which causes warning to be treated as errors. If we use the penalty recursively, that will include the penalty for the last line, so we'll need to somehow propagate to the later stage that we don't wanna handle the penalty for the last line there. Also, thank you very much for Iosevka. Is this suddenly not an issue anymore in the new gcc version? to your account. This routine handles this complexity. finding bugs that are caused by us storing incorrect information in the cache or something might be extraordinarily hard to track down. I have this simple function, in which I get an error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]. Reasons why an expression might not be an l-value. (When is a debt "realized"?). The argument can either be a single identifier or a scoped identifier. Actually, clang swears at something completely different. when i compile it (Clang 5.0.0 with -Weverything) i obtain those warnings: the same thing happens with this other function vsnprintf(buf, sizeof(buf), fmt, ap); Apparently the solution is to tell Clang that your vsnprintf is called within a function that implements the behaviour of the printf family of functions by, well, calling vsnprintf. Error: format string is not a string literal cstringgcc 24,842 Solution 1 Use: printf("%s", str_a); to get rid of the warning when -Wformat-securityis enabled. Would ATV Cavalry be as effective as horse cavalry? I don't see why (1) holds, though, as we're already doing recursive formatting for child blocks within statements. getObjectKind - The object kind that this expression produces. Thank you! Why "stepped off the train" instead of "stepped off a train"? Compiling error on LLVM/Clang: format string is not a string literal. Specific word that describe "average cost of something". The second number, which is 0 here, should then be the argument index of the variadic argument, .. See also this discussion. More. http://clang.llvm.org/docs/ClangFormatStyleOptions.html, Write AndroidManifest.xml file for Gradle project. I just upgraded from clang-format 4.0.0 installed last year to clang-format 5.0.0, with no change in behavior regarding raw literal strings. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Here's how formatting of blocks inside expressions works now: Can one use bestehen in this translation? And explicit is always better. References getByteLength(), and getCharByteWidth(). Can't be used with -offset and -length. are incorrectly formatted with clang-format. Conceptually, the penalty stuff is an implementation detail of the Optimizing Formatter. References clang::Stmt::StringLiteralBits. EvaluateAsBooleanCondition - Return true if this is a constant which we can fold and convert to a boolean condition using any crazy technique that we want to, even if the expression has side-effects. Check if this expression is the ObjC 'self' implicit parameter. In that case, the penalty estimation would work. I believe that the value of the cache is that it shows explicitly and mechanically the exact state that is propagated to the inner formatter. privacy statement. Can you give an example where that's not true? This warning now blocks mksh upgrade in Android open source. The text was updated successfully, but these errors were encountered: This repository has been archived by the owner before Nov 9, 2022. Stupid me. I'm not sure whether that's worth it, but I'm happy to let Daniel tip the scale. References clang::ASTContext::Allocate(). The point is that it's generally a pretty bad idea to pass arbitrary input as printf format strings. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The above solution worked but i did not understand the concept behind the same . This keeps track of the locations of each of these pieces. Child Iterators: All subclasses must implement 'children' to permit easy iteration over the substatements/subexpressions of an AST node. The NoColumnLimitFormatter doesn't care about penalties at all, so we can also assume 0. immediate binding: If the -Wl,-z,now flag is passed to the linker, all symbols are resolved at load time. Check whether this array fits the idiom of a flexible array member, depending on the value of -fstrict-flex-array. And this patch partially fixes one. Sorry, I'll update it. The formatter itself controls it. This section lists the supported style options. The length in bytes is this length times the width of a single character. Referenced by getByteLength(), getCodeUnit(), clang::CodeGen::CodeGenModule::GetConstantArrayFromStringLiteral(), and getString(). Problem is related to Clang. Walk outwards from an expression we want to bind a reference to and find the expression whose lifetime needs to be extended. AlarmManager.m:313:9: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], anjuta-status.c:215:30: error: format string is not a string literal [-Werror,-Wformat-nonliteral], brasero-misc.c:115:11: error: format string is not a string literal [-Werror,-Wformat-nonliteral], Controller.m:254:14: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], src/cheese-window.c:617:162: error: format string is not a string literal [-Werror,-Wformat-nonliteral], csm-dbus-client.c:131:39: error: format string is not a string literal [-Werror,-Wformat-nonliteral], amber_ascii_export.c:498:23: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], hawki_cal_zpoint.c:566:51: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], xsh_model_io.c:691:35: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], runstat.c:79:31: error: format string is not a string literal [-Werror,-Wformat-nonliteral], ephy-sqlite-connection.c:63:56: error: format string is not a string literal [-Werror,-Wformat-nonliteral], synctex_parser_utils.c:106:29: error: format string is not a string literal [-Werror,-Wformat-nonliteral], lib/sa_log.c:73:28: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gengtype-lex.l:594:31: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], chartable.c:189:28: error: format string is not a string literal [-Werror,-Wformat-nonliteral], ./base/gsdevice.c:1012:25: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], gitg-debug.c:66:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], trashapplet.c:339:36: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gnome-chess.c:4426:134: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], :1489:31: error: format string is not a string literal [-Werror,-Wformat-nonliteral], sound-theme-file-utils.c:193:33: error: format string is not a string literal [-Werror,-Wformat-nonliteral], goakerberosidentity.c:318:39: error: format string is not a string literal [-Werror,-Wformat-nonliteral], panel-applet-frame.c:780:7: error: format string is not a string literal [-Werror,-Wformat-nonliteral], photos-search-match.c:63:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], triggerSelectWindow.c:539:189: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], gs-listener-dbus.c:362:39: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gnome-sudoku.vala:288:146: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], gnome-tetravex.c:1118:134: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], app/error-info.c:63:33: error: format string is not a string literal [-Werror,-Wformat-nonliteral], go-format.c:5572:26: error: format string is not a string literal [-Werror,-Wformat-nonliteral], GormClassInspector.m:541:51: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], grl-log.c:298:31: error: format string is not a string literal [-Werror,-Wformat-nonliteral], grl-bliptv.c:412:28: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gth-browser.c:954:23: error: format string is not a string literal [-Werror,-Wformat-nonliteral], test-widget.c:271:26: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gtr-viewer.c:154:27: error: format string is not a string literal [-Werror,-Wformat-nonliteral], bonobo-ui-node.c:844:40: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gnome-gconf-ui.c:187:50: error: format string is not a string literal [-Werror,-Wformat-nonliteral], gxps-images.c:352:34: error: format string is not a string literal [-Werror,-Wformat-nonliteral], status.cstatus.cstatus.c:194:30: error: format string is not a string literal [-Werror,-Wformat-nonliteral], lldp_dcbx_nl.c:808:17: error: format string is not a string literal [-Werror,-Wformat-nonliteral], NNTPServer.m:488:33: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], nautilus-sendto.c:386:25: error: format string is not a string literal [-Werror,-Wformat-nonliteral], SyntaxDefinition.m:271:21: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], sj-metadata-musicbrainz5.c:552:32: error: format string is not a string literal [-Werror,-Wformat-nonliteral], ker/goodies.c:992:30: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], TerminalView.m:1133:10: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security], totem-main-toolbar.c:138:36: error: format string is not a string literal [-Werror,-Wformat-nonliteral], udisksclient.c:1998:40: error: format string is not a string literal [-Werror,-Wformat-nonliteral], vinagre/vinagre-bookmarks-ui.c:330:12: error: format string is not a string literal [-Werror,-Wformat-nonliteral], plugin.c:858:26: error: format string is not a string literal [-Werror,-Wformat-nonliteral].
Wynncraft Server Name, Constraint Satisfaction Problem Example, Checkpoint A Spanish Exam, Capital One Control Your Card, High School Sd Volleyball, Native American Wind Flute, Sql Datetime Comparison Not Working, Dfs Backtracking Leetcode,