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PONeed to release resources with Clang using C API?
 

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  1. PONeed to release resources with Clang using C API?
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    <p>Sorry for probably silly question: should i release command args vars and unsaved files structures when using Clang C API functions? I do know that in common case one should release resources to avoid memory leaks, but i wonder if Clang does it itself on <code>clang_disposeTranslationUnit()</code>.</p> <p>I'm having clang crash after few iterations of parse/diags + tokenize/dispose so i have to eliminate possible problems one-by-one.</p> <p>Parsing for example:</p> <pre><code>char **args; CXUnsavedFile *files; // allocate args args = new char*[N]; for (int i=0; i&lt;N; i++) { int len = strlen(argv[i]); args[i] = new char[len + 1]; args[i][len] = 0; strcpy(arg[i], argv[i]); } // allocate unsaved files files = new CXUnsavedFile[M]; for (int i=0; i&lt;M; i++) { files[i].Filename = new char[BBB]; // + fill Filename files[i].Contents = new char[CCC]; // + fill Contents files[i].Length = strlen(files[i].Contents); } clang_parseTranslationUnit(..., args, N, files, M); // release resources (need to do?) // args for (int i=0; i&lt;N; i++) { delete []args[i]; } delete[] args; // unsaved files for (int i=0; i&lt;M; i++) { delete []files[i].Filename; delete []files[i].Contents; } delete []files; </code></pre> <p>UPDATE: for those who think it's really silly question - answer in 30 seconds what is the reason for the crash:</p> <pre><code>12-11 00:10:38.126: INFO/DEBUG(166): backtrace: 12-11 00:10:38.126: INFO/DEBUG(166): #00 pc 0001832a /system/lib/libc.so 12-11 00:10:38.126: INFO/DEBUG(166): #01 pc 0000dc04 /system/lib/libc.so (abort+4) 12-11 00:10:38.126: INFO/DEBUG(166): #02 pc 0001f0df /system/lib/libc.so (__assert2+30) 12-11 00:10:38.126: INFO/DEBUG(166): #03 pc 0077c954 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::Lexer::getSourceLocation(char const*, unsigned int) const+76) 12-11 00:10:38.126: INFO/DEBUG(166): #04 pc 0077ca4c /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::Lexer::FormTokenWithChars(clang::Token&amp;, char const*, clang::tok::TokenKind)+100) 12-11 00:10:38.126: INFO/DEBUG(166): #05 pc 00781098 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::Lexer::LexTokenInternal(clang::Token&amp;)+5616) 12-11 00:10:38.126: INFO/DEBUG(166): #06 pc 0015de68 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::Lexer::LexFromRawLexer(clang::Token&amp;)+116) 12-11 00:10:38.126: INFO/DEBUG(166): #07 pc 00781d3c /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::Lexer::getRawToken(clang::SourceLocation, clang::Token&amp;, clang::SourceManager const&amp;, clang::LangOptions const&amp;)+220) 12-11 00:10:38.126: INFO/DEBUG(166): #08 pc 00781d9c /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::Lexer::MeasureTokenLength(clang::SourceLocation, clang::SourceManager const&amp;, clang::LangOptions const&amp;)+36) 12-11 00:10:38.126: INFO/DEBUG(166): #09 pc 001d1824 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::DiagnosticRenderer::emitMacroExpansions(clang::SourceLocation, clang::DiagnosticsEngine::Level, llvm::ArrayRef&lt;clang::CharSourceRange&gt;, llvm::ArrayRef&lt;clang::FixItHint&gt;, clang::SourceManager const&amp;, unsigned int&amp;, unsigned int)+840) 12-11 00:10:38.126: INFO/DEBUG(166): #10 pc 001d13ec /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::DiagnosticRenderer::emitDiagnostic(clang::SourceLocation, clang::DiagnosticsEngine::Level, llvm::StringRef, llvm::ArrayRef&lt;clang::CharSourceRange&gt;, llvm::ArrayRef&lt;clang::FixItHint&gt;, clang::SourceManager const*, llvm::PointerUnion&lt;clang::Diagnostic const*, clang::StoredDiagnostic const*&gt;)+1224) 12-11 00:10:38.126: INFO/DEBUG(166): #11 pc 001d1b20 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::DiagnosticRenderer::emitStoredDiagnostic(clang::StoredDiagnostic&amp;)+304) 12-11 00:10:38.126: INFO/DEBUG(166): #12 pc 0017b1c8 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang.so (clang::cxdiag::lazyCreateDiags(CXTranslationUnitImpl*, bool)+248) 12-11 00:10:38.126: INFO/DEBUG(166): #13 pc 00009028 /data/data/name.antonsmirnov.android.arduinodroid/lib/libclang_wrapper.so (Java_name_antonsmirnov_clang_clang_1wrapper_getDiagnostics+72) 12-11 00:10:38.126: INFO/DEBUG(166): #14 pc 0001fb70 /system/lib/libdvm.so (dvmPlatformInvoke+112) 12-11 00:10:38.126: INFO/DEBUG(166): #15 pc 0004e8b9 /system/lib/libdvm.so (dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+360) 12-11 00:10:38.126: INFO/DEBUG(166): #16 pc 00029020 /system/lib/libdvm.so 12-11 00:10:38.126: INFO/DEBUG(166): #17 pc 0002d7e8 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+180) 12-11 00:10:38.126: INFO/DEBUG(166): #18 pc 0005fed5 /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+272) 12-11 00:10:38.126: INFO/DEBUG(166): #19 pc 0005feff /system/lib/libdvm.so (dvmCallMethod(Thread*, Method const*, Object*, JValue*, ...)+20) 12-11 00:10:38.126: INFO/DEBUG(166): #20 pc 00055327 /system/lib/libdvm.so 12-11 00:10:38.126: INFO/DEBUG(166): #21 pc 00012e70 /system/lib/libc.so (__thread_entry+48) 12-11 00:10:38.126: INFO/DEBUG(166): #22 pc 000125c8 /system/lib/libc.so (pthread_create+172) </code></pre>
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    1. COWhats the problem with `std::vector`?
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      1. USManu343726
    2. COi'm not c++ developer so i'd prefer to avoid using std in order to make no errors
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      1. US4ntoine
    3. CO@4ntoine: You're much more likely to make errors, like the one's you made here, if you try to manage memory yourself.
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      1. PONeed to release resources with Clang using C API?
      1. USMike Seymour
 

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