search for: png_ptr

Hi all, I have managed to compile libpng using wllvm and obtain the IR of pngpixel ( small tool which is part of libpng ). libpng has a function called png_check_IHDR: void /* PRIVATE */ png_check_IHDR(png_const_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type) { int error = 0; /* Check for width and height valid values */ if (width == 0) { png_warning(png_ptr, "Image width is zero in IHDR"...

...: > >> Hi all, >> I have managed to compile libpng using wllvm and obtain the IR of >> pngpixel ( small tool which is part of libpng ). >> >> libpng has a function called png_check_IHDR: >> >> void /* PRIVATE */ >> png_check_IHDR(png_const_structrp png_ptr, >> png_uint_32 width, png_uint_32 height, int bit_depth, >> int color_type, int interlace_type, int compression_type, >> int filter_type) >> { >> int error = 0; >> >> /* Check for width and height valid values */ >> if (width == 0)...

...t_def*, i8*)* %free_fn) #15 I would like to understand where bitcast is defined because it is not defined within libpng. I also noticed that the @ is not present, what does the missing @ mean? I guess it must be an LLVM function. The bitcast operation seems to represent the following C code: if (png_ptr != NULL) { png_ptr->mem_ptr = mem_ptr; png_ptr->malloc_fn = malloc_fn; png_ptr->free_fn = free_fn; } -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20190310/ee28921d/attachment...

...--- syslinux-3.07/com32/lib/libpng/pngwrite.c.gcc4 2005-01-08 00:58:20.000000000 -0500 +++ syslinux-3.07/com32/lib/libpng/pngwrite.c 2005-03-07 11:26:46.000000000 -0500 @@ -435,7 +435,7 @@ png_malloc_ptr malloc_fn, png_free_ptr free_fn) { #endif /* PNG_USER_MEM_SUPPORTED */ - png_structp png_ptr; + volatile png_structp png_ptr; #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD jmp_buf jmpbuf; --- syslinux-3.07/com32/lib/libpng/pngread.c.gcc4 2005-01-08 00:58:20.000000000 -0500 +++ syslinux-3.07/com32/lib/libpng/pngread.c 2005-03-07 11:26:46.000000000 -0500 @@ -33,7 +33,7 @@ { #e...

...included from rbitmap.c:45: /usr/include/png.h:1034: error: parse error before "z_stream" /usr/include/png.h:1262: error: parse error before '}' token /usr/include/png.h:1821: error: parse error before "png_zalloc" /usr/include/png.h:1821: error: parse error before "png_ptr" /usr/include/png.h:1825: error: parse error before "png_ptr" rbitmap.c: In function `my_png_error': rbitmap.c:72: error: dereferencing pointer to incomplete type rbitmap.c: In function `R_SaveAsPng': rbitmap.c:121: error: dereferencing pointer to incomplete type make[4]: ***...

...map.h:23: error: ‘png_sig_cmp’ was not declared in this scope pngpixmap.h:20: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result pngpixmap.h: In constructor ‘PNGPixmapFormat::Load::Load(FILE*, Pixmap*)’: pngpixmap.h:66: error: ‘png_ptr’ was not declared in this scope pngpixmap.h:67: error: ‘info_ptr’ was not declared in this scope pngpixmap.h: In member function ‘bool PNGPixmapFormat::Load::init()’: pngpixmap.h:76: error: ‘png_ptr’ was not declared in this scope pngpixmap.h:76: error: ‘PNG_LIBPNG_VER_STRING’ was not declared in t...

...included from rbitmap.c:45: /usr/include/png.h:1034: error: parse error before "z_stream" /usr/include/png.h:1262: error: parse error before '}' token /usr/include/png.h:1821: error: parse error before "png_zalloc" /usr/include/png.h:1821: error: parse error before "png_ptr" /usr/include/png.h:1825: error: parse error before "png_ptr" rbitmap.c: In function `my_png_error': rbitmap.c:72: error: dereferencing pointer to incomplete type rbitmap.c: In function `R_SaveAsPng': rbitmap.c:121: error: dereferencing pointer to incomplete type make[4]: ***...

...ENABLE_RTTI=ON -DLLVM_ENABLE_FFI=ON -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_ASSERTIONS=ON .. cmake --build . -- -j8 && sudo cmake --build . --target install Once lli was installed it was enough to use the .bc /usr/local/bin/lli --debug --force-interpreter pngpixel_crash.bc 0 0 mini.png ... png_ptr->width: 1 max_pixel_depth: 24 row_bytes: 28 ... About to interpret: store <2 x %struct.code*> <%struct.code* getelementptr inbounds ([512 x %struct.code], [512 x %struct.code]* @fixedtables.lenfix.681, i64 0, i64 0), %struct.code* getelementptr inbounds ([32 x %struct.code], [32 x %st...

...ABLE_ASSERTIONS=ON .. >> cmake --build . -- -j8 && sudo cmake --build . --target install >> >> Once lli was installed it was enough to use the .bc >> >> /usr/local/bin/lli --debug --force-interpreter pngpixel_crash.bc 0 0 >> mini.png >> ... >> png_ptr->width: 1 >> max_pixel_depth: 24 >> row_bytes: 28 >> ... >> About to interpret: store <2 x %struct.code*> <%struct.code* >> getelementptr inbounds ([512 x %struct.code], [512 x %struct.code]* >> @fixedtables.lenfix.681, i64 0, i64 0), %struct.code*...

...finitely provide the example bc file >> and image ( please see the attachments ). For the debug + asserts I need a >> bit of more time. >> >> Anyway the full output of lli is: >> >> lli --force-interpreter examples/pngpixel_crash.bc 0 0 examples/mini.png >> png_ptr->width: 1 >> max_pixel_depth: 24 >> row_bytes: 28 >> Unknown constant pointer type! >> UNREACHABLE executed at >> /home/al/Desktop/llvm-6.0.1.src/lib/ExecutionEngine/ExecutionEngine.cpp:1007! >> LLVMSymbolizer: error reading file: No such file or directory &gt...

Hi David, Thanks for the suggestions. I can definitely provide the example bc file and image ( please see the attachments ). For the debug + asserts I need a bit of more time. Anyway the full output of lli is: lli --force-interpreter examples/pngpixel_crash.bc 0 0 examples/mini.png png_ptr->width: 1 max_pixel_depth: 24 row_bytes: 28 Unknown constant pointer type! UNREACHABLE executed at /home/al/Desktop/llvm-6.0.1.src/lib/ExecutionEngine/ExecutionEngine.cpp:1007! LLVMSymbolizer: error reading file: No such file or directory #0 0x0000000001765ee9 (lli+0x1765ee9) #1 0x00000000017660...

...t; cmake --build . -- -j8 && sudo cmake --build . --target install >>> >>> Once lli was installed it was enough to use the .bc >>> >>> /usr/local/bin/lli --debug --force-interpreter pngpixel_crash.bc 0 0 >>> mini.png >>> ... >>> png_ptr->width: 1 >>> max_pixel_depth: 24 >>> row_bytes: 28 >>> ... >>> About to interpret: store <2 x %struct.code*> <%struct.code* >>> getelementptr inbounds ([512 x %struct.code], [512 x %struct.code]* >>> @fixedtables.lenfix.681, i64 0...

...truct.png_struct_def* %create_struct, i8* %mem_ptr, i8* (%struct.png_struct_def*, i64)* %malloc_fn, void (%struct.png_struct_def*, i8*)* %free_fn) "the parameters passed to the png_set_mem_fn" As a clarification the function is declared like this: void PNGAPI png_set_mem_fn(png_structrp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn) Thanks again Il giorno dom 10 mar 2019 alle ore 08:59 Tim Northover < t.p.northover at gmail.com> ha scritto: > Hi Alberto, > > > I would like to understand where bitcast is defined because it is not > d...

...ountered a weird case that I cannot understand. Inside the visitStoreInst I have a reference (F) to the function png_set_mem_fn. If I do F->dump() i can set the IR of that function correctly e.g.: ; Function Attrs: nounwind uwtable define void @png_set_mem_fn(%struct.png_struct_def.68* noalias %png_ptr, i8* %mem_ptr, i8* (%struct.png_struct_def.68*, i64)* %malloc_fn, void (%struct.png_struct_def.68*, i8*)* %free_fn) #5 { ... } The problem is that when I do F->getNumOperands() I have 0 as result. Can you explain me why please? Thanks -------------- next part -------------- An HTML attachmen...

Hi all, as usual I'm playing with the Interpreter and unfortunately I hit a crash. I have narrowed down the problem an the crash happens inside the inflate function which is part of zlib and specifically at the instruction: store <2 x %struct.code*> <%struct.code* getelementptr inbounds ([512 x %struct.code], [512 x %struct.code]* @fixedtables.lenfix.681, i64 0, i64 0), %struct.code*