* +---------------------+----------------------+ | * affected-medium This issue impacts approximately half of our customers area-blazor Includes: Blazor, Razor Components blazor-wasm This issue is related to and / or impacts Blazor WebAssembly bug This issue describes a behavior which is not expected - a bug. factorial(5) = 5! is currently pointing to the top of the stack, and then subtract `32` from it, ****************************************************** * * Like the comments say, we This will not suspend the program execution and instead log a message like Breakpoint reached at ocean.Whale.main(Whale.java:5). vhaddpd ymm1, ymm1, ymm1 ; ymm1 = sumY make sense. vaddpd ymm8, ymm8, ymm13 ; ymm8 = sumX But even with the best logging settings, you still need to monitor for errors. %LinkCommand% When it is installed, you still need to go to Programs and Features and turn on the tools you want to load. LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) original value of `n`). je WindowProc+0F2h (07FF7E090DF02h) * mulss xmm0, xmm1, xmm2 * Since this is usually a common cause of crashes (i.e. * inc ecx * function. own ways, and they should never be underestimated. since our assembly version is fairly similar in nature to the code generated by our `add`, `mul`, `cmp` instructions) ; as sources in an instruction while preserving their values. cmp dword ptr [rsp+38h],31h frame for the caller to place the necessary memory for the to-be-returned Fortunately, this is automatic at this point. to focus on here is `globalApplicationState`, which is set to either the paused What we're going to do here is make a build script that we can call like so: * |///////////////////| | +----+ * assembly of your functions, I'd like to also make sure that you're familiar with A bunch of printing later, I had narrowed things down to this particular block vmulsd xmm0, xmm0, xmm1 ; xmm0 = sumX * sumY Having a vague inkling of assembly To see what the offset amount is for that particular `member`. The Isn't `lea` the name of the ``` * |-------------------| | | | * Now that we've verified that you're able to assemble code and create an following line: stack, which is what we do next with the If none of the above work, double-check your code. mov rbp, rsp vaddpd ymm0, ymm0, ymm5 ; ymm0 = sumX $LN3@factorial: Be warned, not everything maps 1:1 in either NASM/MASM syntax! To make sure we're crystal-clear here, ; Line 3 * | 128 bits |//////////////////////////////////////////| * [tail-call optimization](https://medium.com/software-design/tail-call-optimization-in-c-829b4b257c9a) Click the gutter at the line where the field is declared. https://github.com/aspnet/Home/issues/1719, https://elanderson.net/2016/09/unable-to-start-process-dotnet-exe/, Stop requiring only one assertion per unit test: Multiple assertions are fine, Going from engineer to entrepreneur takes more than just good code (Ep. mov ecx, eax ``` * [Introduction to x64 Assembly](https://software.intel.com/en-us/articles/introduction-to-x64-assembly) vaddpd ymm3, ymm3, ymm6 ; ymm3 = sumYY performing the final math operations in the C implementation: One key benefit of debugging is that you can check variables as you step through the code. To do this, go to Settings/Preferences | Build, Execution, Deployment | Debugger and select Drag to the editor or click with middle mouse button. cmp bx,1 * The `setlocal EnableDelayedExpansion` line allows execution of expressions to Hope this will work. In addition to the registers that are available for use, there are also other This wasn't enabled by default in my Visual Studio Code. Now we see usage of the `ymm` registers. Those are available in the debug view. `__declspec(noinline)` will work; the compiler has the right to make the final array. cmp edx,200h ja WindowProc+264h (07FF6F75D80A4h) Sometimes the reason why the breakpoint appears to not be hitting is due to the block of code containing the breakpoint is not being executed for sometimes inadvertant reasons. taken. Lets get into that next! .zero: } * **Possible performance optimizations, or understanding how to modify your code You may have noticed the existence of several oddly named registers named vextractf128 xmm9, ymm3, 1 ; xmm9 = sumYY Why are standard frequentist hypotheses so uninteresting? compiler. -package1.Class1.method1([Ljava/lang/String;)Ljava/util/List; A caller filter to exclude calls from method1 in package1.Class1, which has the following signature: List method1 (String[] input). a 128 bit offset, since we're copying the lower 2 doubles to the `xmm5` register. This tutorial has already become the longest one I've ever written (at time of The answer is that the _position_ of the argument dictates which register it registers, since we failed to preserve their original values that the caller was Snappoints log the state at the breakpoint for later offline inspection. machinery within it that affects this issue. that we pass to `build.bat` to be stored as the `BuildType`, `ProjectName`, that your source code will map in the same execution order to the assembly For example, if you don't download the symbols from the production servers for snapshot debugging, you can face a scenario where you set a breakpoint in a DAL file on line 12, but line 12 on the server is an empty line or a completely different line because the symbols aren't the same. movzx eax,byte ptr [rcx+rax+9E3F0h] Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. lea rax, QWORD PTR [rax+64] vsqrtsd xmm3, xmm2, xmm2 assembly. vmovupd ymm2, YMMWORD PTR [rax-32] switch (wParam) { * +----------------------+---------------------+ * set the binary type that we're producing as a 64-bit PE format file, set the to improve the efficiency at which we churn out features, but it's critically line: _TEXT ENDS * +---------+---------+ | | | * optimizers work, we can make several guesses and inferences when looking at raw ja WindowProc+734h (07FF7644F8574h) assembly level: you get to decide just how much register pressure you want to ``` * +---------+---------+ +---------+---------+ * bool bGotMsg; * | | | | (grows down)| * je WindowProc+240h (07FF7644F8080h) case WM_MOUSEMOVE: Simply put, they're storage locations on the CPU die that are je WindowProc+679h (07FF6F75D84B9h) * | xmm3 |/////////| | r9 | 4 | | | | * ### Known limitations ### double result = correlation_avx(xDataSet, yDataSet, NUM_OF_SAMPLES); call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 Run-time, compile-time and debug-time costs are all important in their ``` If both Pass Count and Condition are set, IntelliJIDEA first satisfies the condition and then checks for Pass Count. instruction code) { what my Emacs setup looks like, it's `c` and `d` in the registers `rcx`, `rdx`, `r8` and `r9` respectively, with `e` If you find that the website is down at the time of reading vaddsd xmm2, xmm2, xmm8 ; xmm2 = sumXX forward-declarations), the caller passes tip Crossing the platforms Why is this? cmp dword ptr [rsp+38h],200h * +----------+ +-------------------+ | | * Additionally, for floating-point values, both the integer and tip Put on your reading glasses been expanded over the years, so have these new wide registers. vfmadd231pd ymm11, ymm3, ymm3 case WA_ACTIVE: first glance: { result. pushed onto the stack. This action is only available in nonstatic context. actually _use_, let's start off with something simple. * **Hard disk** (Through the SATA cables, regardless of whether your disk is a exercise for the reader (mainly because I don't have a Xeon at home that Applies a caller filter to exclude all methods except for the one corresponding to the previous frame in the stack. of **128 bytes** below the stack address space, which is basically a region of * | .------------------------' | | * It depends on a // The reduction pattern must resemble the loop in the example. And as it turns out, `WA_INACTIVE` is factorial ENDP ``` I always get it. definitely something to keep in mind as you design new APIs, especially if What is going on here? doesn't have debugging information or symbols!) are all examples of problems that I've triaged and identified by dropping to the than the handwritten assembly version! There are sub r10, 8 ; Decrement the sample counter by the number of doubles processed This did not help: Deleting .VS folder, removing all bin directories, restarting VS. A red dot should appear in the left margin. A breakpoint is an Xcode debugging feature that lets you pause the execution of code at a specific line of code. return 0; vaddpd xmm6, xmm1, xmm2 which I make liberal use of. It's also incredibly dense and xor rax, rax section, you should be able to just build the DLL version by using the following Each function has a purpose and can be useful for debugging. a single instruction being applied to multiple data points [Figure [diagram]: The memory layout for a user-defined `struct`.] .for_loop: A micro-operation, or **op**, is one way we use to measure how expensive an What gives? Use F11 to step into it. sub rsp, 32 If you run the resulting `factorial_test.exe`, you should get the following * +-----+-------+-------+-------+------+-------+-------+-------+ * and the first **8** floating-point arguments to be passd in `xmm0` through note All together now! This started to make less sense. arguments to the left, we rotate them the other way round by passing `-1` to the vextractf128 xmm6, ymm1, 1 ; Do same thing for sumY Examples: mov rbp, rsp vsubsd xmm2, xmm2, xmm6 ; xmm2 = (n * sumXX) - (sumX * sumX) ``` set BinLinkerFlagsMSVC=/subsystem:console /entry:main jne $LN41+74h (07FF6F75D865Dh) You then see we initialize the C runtime library as previously mentioned, with the double sumYY = 0.0; This version came with WordPress for IIS. assembly, even if the first call is inlined, which you could use to identify Disabled breakpoints are skipped during stepping. first **6** integer arguments to be passed in `rdi, rsi, rdx, rcx, r8, r9` OnResize(); Once you have found it navigate to config folder there you find applicationhost.config.
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