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Source: @q66, @pullmoll
Original upstream: Alpine Linux
Reason: fixing machine context access for musl libc; reduce stack/heap usage for jsc; fix some overly restrictive __GLIBC__ checks
Updated for latest webkit2gtk.
--- Source/JavaScriptCore/runtime/MachineContext.h
+++ Source/JavaScriptCore/runtime/MachineContext.h
@@ -188,7 +188,7 @@ static inline void*& stackPointerImpl(mcontext_t& machineContext)
#error Unknown Architecture
#endif
-#elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__)
+#elif OS(FUCHSIA) || defined(__linux__)
#if CPU(X86)
return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_ESP]);
@@ -335,7 +335,7 @@ static inline void*& framePointerImpl(mcontext_t& machineContext)
#error Unknown Architecture
#endif
-#elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__)
+#elif OS(FUCHSIA) || defined(__linux__)
// The following sequence depends on glibc's sys/ucontext.h.
#if CPU(X86)
@@ -482,7 +482,7 @@ static inline void*& instructionPointerImpl(mcontext_t& machineContext)
#error Unknown Architecture
#endif
-#elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__)
+#elif OS(FUCHSIA) || defined(__linux__)
// The following sequence depends on glibc's sys/ucontext.h.
#if CPU(X86)
@@ -639,7 +639,7 @@ inline void*& argumentPointer<1>(mcontext_t& machineContext)
#error Unknown Architecture
#endif
-#elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__)
+#elif OS(FUCHSIA) || defined(__linux__)
// The following sequence depends on glibc's sys/ucontext.h.
#if CPU(X86)
@@ -756,7 +756,7 @@ inline void*& llintInstructionPointer(mcontext_t& machineContext)
#error Unknown Architecture
#endif
-#elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__)
+#elif OS(FUCHSIA) || defined(__linux__)
// The following sequence depends on glibc's sys/ucontext.h.
#if CPU(X86)
--- Source/JavaScriptCore/runtime/Options.h
+++ Source/JavaScriptCore/runtime/Options.h
@@ -112,6 +112,16 @@ constexpr bool enableWebAssemblyStreamingApi = true;
constexpr bool enableWebAssemblyStreamingApi = false;
#endif
+#if defined(__GLIBC__)
+constexpr unsigned jscMaxPerThreadStack = 4 * MB;
+constexpr unsigned jscSoftReservedZoneSize = 128 * KB;
+constexpr unsigned jscReservedZoneSize = 64 * KB;
+#else
+constexpr unsigned jscMaxPerThreadStack = 80 * KB;
+constexpr unsigned jscSoftReservedZoneSize = 32 * KB;
+constexpr unsigned jscReservedZoneSize = 16 * KB;
+#endif
+
#define JSC_OPTIONS(v) \
v(bool, useKernTCSM, true, Normal, "Note: this needs to go before other options since they depend on this value.") \
v(bool, validateOptions, false, Normal, "crashes if mis-typed JSC options were passed to the VM") \
@@ -126,9 +136,9 @@ constexpr bool enableWebAssemblyStreamingApi = false;
\
v(bool, reportMustSucceedExecutableAllocations, false, Normal, nullptr) \
\
- v(unsigned, maxPerThreadStackUsage, 4 * MB, Normal, "Max allowed stack usage by the VM") \
- v(unsigned, softReservedZoneSize, 128 * KB, Normal, "A buffer greater than reservedZoneSize that reserves space for stringifying exceptions.") \
- v(unsigned, reservedZoneSize, 64 * KB, Normal, "The amount of stack space we guarantee to our clients (and to interal VM code that does not call out to clients).") \
+ v(unsigned, maxPerThreadStackUsage, jscMaxPerThreadStack, Normal, "Max allowed stack usage by the VM") \
+ v(unsigned, softReservedZoneSize, jscSoftReservedZoneSize, Normal, "A buffer greater than reservedZoneSize that reserves space for stringifying exceptions.") \
+ v(unsigned, reservedZoneSize, jscReservedZoneSize, Normal, "The amount of stack space we guarantee to our clients (and to interal VM code that does not call out to clients).") \
\
v(bool, crashIfCantAllocateJITMemory, false, Normal, nullptr) \
v(unsigned, jitMemoryReservationSize, 0, Normal, "Set this number to change the executable allocation size in ExecutableAllocatorFixedVMPool. (In bytes.)") \
--- Source/ThirdParty/ANGLE/src/compiler/preprocessor/ExpressionParser.cpp
+++ Source/ThirdParty/ANGLE/src/compiler/preprocessor/ExpressionParser.cpp
@@ -728,7 +728,7 @@ int yydebug;
#if YYERROR_VERBOSE
# ifndef yystrlen
-# if defined __GLIBC__ && defined _STRING_H
+# if defined __linux__ && defined _STRING_H
# define yystrlen strlen
# else
/* Return the length of YYSTR. */
@@ -743,7 +743,7 @@ static YYSIZE_T yystrlen(const char *yystr)
# endif
# ifndef yystpcpy
-# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
+# if defined __linux__ && defined _STRING_H && defined _GNU_SOURCE
# define yystpcpy stpcpy
# else
/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
--- Source/WTF/wtf/Platform.h
+++ Source/WTF/wtf/Platform.h
@@ -707,7 +707,7 @@
#endif /* OS(DARWIN) */
-#if OS(DARWIN) || OS(FUCHSIA) || ((OS(FREEBSD) || defined(__GLIBC__) || defined(__BIONIC__)) && (CPU(X86) || CPU(X86_64) || CPU(ARM) || CPU(ARM64) || CPU(MIPS)))
+#if OS(DARWIN) || OS(FUCHSIA) || ((OS(FREEBSD) || defined(__linux__)) && (CPU(X86) || CPU(X86_64) || CPU(ARM) || CPU(ARM64) || CPU(MIPS)))
#define HAVE_MACHINE_CONTEXT 1
#endif
--- Source/WebCore/xml/XPathGrammar.cpp
+++ Source/WebCore/xml/XPathGrammar.cpp
@@ -966,7 +966,7 @@
#if YYERROR_VERBOSE
# ifndef yystrlen
-# if defined __GLIBC__ && defined _STRING_H
+# if defined __linux__ && defined _STRING_H
# define yystrlen strlen
# else
/* Return the length of YYSTR. */
@@ -989,7 +989,7 @@
# endif
# ifndef yystpcpy
-# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
+# if defined __linux__ && defined _STRING_H && defined _GNU_SOURCE
# define yystpcpy stpcpy
# else
/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
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