v8: backport a9e56f4f36d from upstream v8

Because 5.8 still had other uses of the removed flag, there are some extra
changes in Heap::ConfigureHeap and api.cc:SetResourceConstraints.

Original commit message:
    [heap] Remove max_executable_size resource constraint.

    BUG=chromium:716032

    Review-Url: https://codereview.chromium.org/2890603007
    Cr-Commit-Position: refs/heads/master@{#45400}

PR-URL: #13217
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

deps/v8/include/v8.h

@@ -5723,8 +5723,12 @@ class V8_EXPORT ResourceConstraints {
   void set_max_old_space_size(int limit_in_mb) {
     max_old_space_size_ = limit_in_mb;
   }
-  int max_executable_size() const { return max_executable_size_; }
-  void set_max_executable_size(int limit_in_mb) {
+  V8_DEPRECATE_SOON("max_executable_size_ is subsumed by max_old_space_size_",
+                    int max_executable_size() const) {
+    return max_executable_size_;
+  }
+  V8_DEPRECATE_SOON("max_executable_size_ is subsumed by max_old_space_size_",
+                    void set_max_executable_size(int limit_in_mb)) {
     max_executable_size_ = limit_in_mb;
   }
   uint32_t* stack_limit() const { return stack_limit_; }

deps/v8/src/api.cc

@@ -798,7 +798,6 @@ Extension::Extension(const char* name,
 ResourceConstraints::ResourceConstraints()
     : max_semi_space_size_(0),
       max_old_space_size_(0),
-      max_executable_size_(0),
       stack_limit_(NULL),
       code_range_size_(0),
       max_zone_pool_size_(0) {}
@@ -820,24 +819,20 @@ void ResourceConstraints::ConfigureDefaults(uint64_t physical_memory,
   if (physical_memory <= low_limit) {
     set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeLowMemoryDevice);
     set_max_old_space_size(i::Heap::kMaxOldSpaceSizeLowMemoryDevice);
-    set_max_executable_size(i::Heap::kMaxExecutableSizeLowMemoryDevice);
     set_max_zone_pool_size(i::AccountingAllocator::kMaxPoolSizeLowMemoryDevice);
   } else if (physical_memory <= medium_limit) {
     set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeMediumMemoryDevice);
     set_max_old_space_size(i::Heap::kMaxOldSpaceSizeMediumMemoryDevice);
-    set_max_executable_size(i::Heap::kMaxExecutableSizeMediumMemoryDevice);
     set_max_zone_pool_size(
         i::AccountingAllocator::kMaxPoolSizeMediumMemoryDevice);
   } else if (physical_memory <= high_limit) {
     set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeHighMemoryDevice);
     set_max_old_space_size(i::Heap::kMaxOldSpaceSizeHighMemoryDevice);
-    set_max_executable_size(i::Heap::kMaxExecutableSizeHighMemoryDevice);
     set_max_zone_pool_size(
         i::AccountingAllocator::kMaxPoolSizeHighMemoryDevice);
   } else {
     set_max_semi_space_size(i::Heap::kMaxSemiSpaceSizeHugeMemoryDevice);
     set_max_old_space_size(i::Heap::kMaxOldSpaceSizeHugeMemoryDevice);
-    set_max_executable_size(i::Heap::kMaxExecutableSizeHugeMemoryDevice);
     set_max_zone_pool_size(
         i::AccountingAllocator::kMaxPoolSizeHugeMemoryDevice);
   }
@@ -856,13 +851,11 @@ void SetResourceConstraints(i::Isolate* isolate,
                             const ResourceConstraints& constraints) {
   int semi_space_size = constraints.max_semi_space_size();
   int old_space_size = constraints.max_old_space_size();
-  int max_executable_size = constraints.max_executable_size();
   size_t code_range_size = constraints.code_range_size();
   size_t max_pool_size = constraints.max_zone_pool_size();
-  if (semi_space_size != 0 || old_space_size != 0 ||
-      max_executable_size != 0 || code_range_size != 0) {
+  if (semi_space_size != 0 || old_space_size != 0 || code_range_size != 0) {
     isolate->heap()->ConfigureHeap(semi_space_size, old_space_size,
-                                   max_executable_size, code_range_size);
+                                   0 /*max_executable_size*/, code_range_size);
   }
   isolate->allocator()->ConfigureSegmentPool(max_pool_size);
 

deps/v8/src/flag-definitions.h

@@ -604,7 +604,6 @@ DEFINE_BOOL(experimental_new_space_growth_heuristic, false,
             "of their absolute value.")
 DEFINE_INT(max_old_space_size, 0, "max size of the old space (in Mbytes)")
 DEFINE_INT(initial_old_space_size, 0, "initial old space size (in Mbytes)")
-DEFINE_INT(max_executable_size, 0, "max size of executable memory (in Mbytes)")
 DEFINE_BOOL(gc_global, false, "always perform global GCs")
 DEFINE_INT(gc_interval, -1, "garbage collect after <n> allocations")
 DEFINE_INT(retain_maps_for_n_gc, 2,

deps/v8/src/heap/heap.cc

@@ -5077,9 +5077,6 @@ bool Heap::ConfigureHeap(size_t max_semi_space_size, size_t max_old_space_size,
     max_old_generation_size_ =
         static_cast<size_t>(FLAG_max_old_space_size) * MB;
   }
-  if (FLAG_max_executable_size > 0) {
-    max_executable_size_ = static_cast<size_t>(FLAG_max_executable_size) * MB;
-  }
 
   if (Page::kPageSize > MB) {
     max_semi_space_size_ = ROUND_UP(max_semi_space_size_, Page::kPageSize);

deps/v8/src/heap/heap.h

@@ -614,16 +614,6 @@ class Heap {
   static const int kMaxOldSpaceSizeHighMemoryDevice = 512 * kPointerMultiplier;
   static const int kMaxOldSpaceSizeHugeMemoryDevice = 1024 * kPointerMultiplier;
 
-  // The executable size has to be a multiple of Page::kPageSize.
-  // Sizes are in MB.
-  static const int kMaxExecutableSizeLowMemoryDevice = 96 * kPointerMultiplier;
-  static const int kMaxExecutableSizeMediumMemoryDevice =
-      192 * kPointerMultiplier;
-  static const int kMaxExecutableSizeHighMemoryDevice =
-      256 * kPointerMultiplier;
-  static const int kMaxExecutableSizeHugeMemoryDevice =
-      256 * kPointerMultiplier;
-
   static const int kTraceRingBufferSize = 512;
   static const int kStacktraceBufferSize = 512;