llvm-project/lld/test/wasm/thread-context-abi-mismatch.s at a2367c8e14acb592a55b9b6d21bbd7d6cfd9b271 · llvm/llvm-project · GitHub

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# Test that linking object files with mismatched thread context ABIs fails with an error.

# RUN: split-file %s %t

# Test that the presence of an import of __stack_pointer from the env module is treated
# as an indication that the global thread context ABI is being used, even if the
# libcall-thread-context feature is not disallowed.

# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t/start.o %t/start.s
# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t/stack-pointer.o %t/stack-pointer.s
# RUN: not wasm-ld --libcall-thread-context %t/start.o %t/stack-pointer.o -o %t/fail.wasm 2>&1 | FileCheck %s

# Test that explicitly disallowing the libcall-thread-context feature causes linking to fail
# with an error when other files use the feature.

# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t/disallow.o %t/disallow.s
# RUN: not wasm-ld --libcall-thread-context %t/start.o %t/disallow.o -o %t/fail.wasm 2>&1 | FileCheck %s

# CHECK: error: --libcall-thread-context is disallowed by {{.*}} because it uses globals for thread context rather than library function calls.

#--- start.s
.globl _start
_start:
  .functype _start () -> ()
  end_function

.section  .custom_section.target_features,"",@
  .int8 1
  .int8 43
  .int8 22
  .ascii  "libcall-thread-context"

#--- stack-pointer.s
.globaltype __stack_pointer, i32

.globl use_stack_pointer
use_stack_pointer:
  .functype use_stack_pointer () -> ()
  global.get __stack_pointer
  drop
  end_function

#--- disallow.s
.section  .custom_section.target_features,"",@
  .int8 1
  .int8 45
  .int8 22
  .ascii  "libcall-thread-context"