diff options
| -rw-r--r-- | src/binaryen-shell.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/binaryen-shell.cpp b/src/binaryen-shell.cpp index b2ba51544..197de545b 100644 --- a/src/binaryen-shell.cpp +++ b/src/binaryen-shell.cpp @@ -37,7 +37,7 @@ struct ShellExternalInterface : ModuleInstance::ExternalInterface { ShellExternalInterface() : memory(nullptr) {} void init(Module& wasm) override { - memory = (char*)malloc(wasm.memory.initial); + memory = (char*)calloc(wasm.memory.initial, 1); // apply memory segments for (auto segment : wasm.memory.segments) { memcpy(memory + segment.offset, segment.data, segment.size); @@ -114,6 +114,9 @@ struct ShellExternalInterface : ModuleInstance::ExternalInterface { void growMemory(size_t oldSize, size_t newSize) override { memory = (char*)realloc(memory, newSize); + if (newSize > oldSize) { + memset(memory + oldSize, 0, newSize - oldSize); + } } jmp_buf trapState; |