JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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Azure Pipelines successfully started running 2 pipeline(s).

@jakobbotsch
jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

@jakobbotsch

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

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@jakobbotsch@BruceForstall
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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Azure Pipelines successfully started running 2 pipeline(s).

@jakobbotsch
jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

@jakobbotsch

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

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@jakobbotsch@BruceForstall
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

Conversation

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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Azure Pipelines successfully started running 2 pipeline(s).

@jakobbotsch
jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

@jakobbotsch

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

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area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

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2 participants

@jakobbotsch@BruceForstall
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

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@jakobbotsch

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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Azure Pipelines successfully started running 2 pipeline(s).

@jakobbotsch
jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

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area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

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@jakobbotsch@BruceForstall
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

Conversation

@jakobbotsch

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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Azure Pipelines successfully started running 2 pipeline(s).

@jakobbotsch
jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

@jakobbotsch

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Labels

area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

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Development

Successfully merging this pull request may close these issues.

2 participants

@jakobbotsch@BruceForstall
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
Skip to content

JIT: Fix profiler enter callback init reg trash logic - #100637

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed
Apr 4, 2024
Merged

JIT: Fix profiler enter callback init reg trash logic#100637
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:profiler-trashed

Conversation

@jakobbotsch

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During prolog generation we sometimes generate code to call the profiler enter callback. This may trash the "initReg" that we expect to keep zeroed during the prolog. The logic to check if the initReg was being trashed was wrong in a couple of cases:

  • Most backends did not take into account that the logic also trashes the registers used for arguments to the enter callback
  • SysV x64 thought that the enter callback trashed the parameter registers, but it does not

This generally did not cause issues because genFnPrologCalleeRegArgs is unnecessarily conservative around whether or not it trashes initReg, and it comes after the profiler callback in the prolog. However, with the rewrite of the homing function that is not going to be the case anymore.

Fixes an issue I noticed by inspection over in #100572

During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 4, 2024
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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@jakobbotsch

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/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress

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Azure Pipelines successfully started running 2 pipeline(s).

@jakobbotsch
jakobbotsch marked this pull request as ready for review April 4, 2024 19:14
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cc @dotnet/jit-contrib PTAL @BruceForstall

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No diffs -- so no test coverage?

@jakobbotsch

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No diffs -- so no test coverage?

We have test coverage in stress due to STRESS_PROFILER_CALLBACKS. I hit the problem over in #100572. There it wasn't a problem in the baseline because genFnPrologCalleeRegArgs mistakenly was marking the initReg as clobbered (even though it didn't actually end up using it for anything).

@jakobbotsch
jakobbotsch merged commit 96d5a66 into dotnet:mainApr 4, 2024
@jakobbotsch
jakobbotsch deleted the profiler-trashed branch April 4, 2024 19:33
matouskozak pushed a commit to matouskozak/runtime that referenced this pull request Apr 30, 2024
During prolog generation we sometimes generate code to call the profiler
enter callback. This may trash the "initReg" that we expect to keep
zeroed during the prolog. The logic to check if the initReg was being
trashed was wrong in a couple of cases:
- Most backends did not take into account that the logic also trashes
the registers used for arguments to the enter callback
- SysV x64 thought that the enter callback trashed the parameter
registers, but it does not
This generally did not cause issues because `genFnPrologCalleeRegArgs`
is unnecessarily conservative around whether or not it trashes
`initReg`, and it comes after the profiler callback in the prolog.
However, with the rewrite of the homing function that is not going to be
the case anymore.
@github-actionsgithub-actionsBot locked and limited conversation to collaborators May 5, 2024
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

Labels

area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

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Development

Successfully merging this pull request may close these issues.

2 participants

@jakobbotsch@BruceForstall