b2cdf3cc4c
It is beneficial to preallocate a certain number of pages in the linear memory (i. e. use the "minimum" field of WASM memories) so that fewer "memory.grow"s are needed at startup. So far, the way to do that has been to pass the "--initial-memory" option to the linker. It works, but has the very significant downside of requiring the user to know the size of static data beforehand, as it must not exceed the number of bytes passed-in as "--initial-memory". The new "--initial-heap" option avoids this downside by simply appending the specified number of pages to static data (and stack), regardless of how large they already are. Ref: https://github.com/emscripten-core/emscripten/issues/20888.
28 lines
1.8 KiB
Plaintext
28 lines
1.8 KiB
Plaintext
RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %p/Inputs/start.s -o %t.o
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; The initial heap size will be added to the stack size
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RUN: wasm-ld %t.o -o %t1.wasm --stack-first -z stack-size=65536 --initial-heap=131072
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RUN: obj2yaml %t1.wasm | FileCheck %s --check-prefixes=CHECK,CHECK-2P
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; Also test that we can parse and process a large size correctly
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RUN: wasm-ld %t.o -o %t2.wasm --stack-first -z stack-size=65536 --initial-heap=4294901760
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RUN: obj2yaml %t2.wasm | FileCheck %s --check-prefixes=CHECK,CHECK-4G
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CHECK: - Type: MEMORY
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CHECK-NEXT: Memories:
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CHECK-2P-NEXT: Minimum: 0x3
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CHECK-4G-NEXT: Minimum: 0x10000
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; Test various error cases.
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RUN: not wasm-ld %t.o -o %t3.wasm --initial-heap=131073 2>&1 | FileCheck %s --check-prefix NOT-PAGE-MULTIPLE
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RUN: not wasm-ld %t.o -o %t4.wasm --stack-first -z stack-size=65536 --initial-heap=4295032832 2>&1 | FileCheck %s --check-prefix TOO-LARGE-BY-ITSELF
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RUN: not wasm-ld %t.o -o %t5.wasm --stack-first -z stack-size=131072 --initial-heap=4294901760 2>&1 | FileCheck %s --check-prefix TOO-LARGE-WITH-STACK
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RUN: not wasm-ld %t.o -o %t6.wasm --stack-first -z stack-size=65536 --initial-heap=131072 --initial-memory=131072 2>&1 | FileCheck %s --check-prefix INITIAL-MEMORY-TOO-SMALL
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RUN: not wasm-ld %t.o -o %t7.wasm --stack-first -z stack-size=65536 --initial-heap=131072 --max-memory=131072 2>&1 | FileCheck %s --check-prefix MAX-MEMORY-TOO-SMALL
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NOT-PAGE-MULTIPLE: initial heap must be 65536-byte aligned
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TOO-LARGE-BY-ITSELF: initial heap too large, cannot be greater than 4294901760
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TOO-LARGE-WITH-STACK: initial heap too large, cannot be greater than 4294836224
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INITIAL-MEMORY-TOO-SMALL: initial memory too small, 196608 bytes needed
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MAX-MEMORY-TOO-SMALL: maximum memory too small, 196608 bytes needed
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