Summary:
The implementation of `llvm_struct_name` before this diff calls
`caml_copy_string`, which allocates, while the `result` local variable
points to a block allocated by `caml_alloc_small` that has not yet
been initialized. If the allocation in `caml_copy_string` triggers a
garbage collection, then the GC root `result` contains a pointer to
uninitialized data, which may crash the GC or lead to a memory
corruption.
This diff fixes this by allocating and initializing the string first
and then allocating and initializing the option, thereby leaving no
dangling pointers when allocations are made.
The conversion from a C string to an OCaml string option is refactored
into a function, `cstr_to_string_option`. This function is also used
to simplify the definitions of `llvm_get_mdstring` and
`llvm_string_of_const`.
Upstream Differential Revision: https://reviews.llvm.org/D99393
Reviewed By: ngorogiannis
Differential Revision: D27360848
fbshipit-source-id: f2daa7561
Summary:
There are a number of compilation warnings regarding disregarding
const qualifiers, and casting between pointers to integer types with
different sign.
The incompatible sign warnings are due to treating the result of
`LLVMGetModuleIdentifier` as `const unsigned char *`, but it is
declared as `const char *`.
The dropped const qualifiers are due to the code pattern
`memcpy(String_val(_),_,_)` which ought to be (following the
implementation of the OCaml runtime)
`memcpy((char *)String_val(_),_,_)`. The issue is that `String_val` is
usually used to get the value of an immutable string. But in the
context of the `memcpy` calls, the string is in the process of being
initialized, so is not yet constant.
Upstream Differential Revision: https://reviews.llvm.org/D99392
Reviewed By: ngorogiannis
Differential Revision: D27360846
fbshipit-source-id: d045ad7c0
Summary:
This diff uses ptr_to_option to convert a nullable C pointer to an
OCaml option instead of the redundant implementation in
llvm_global_initializer.
Upstream Differential Revision: https://reviews.llvm.org/D99391
Reviewed By: ngorogiannis
Differential Revision: D27360847
fbshipit-source-id: b5bfcadf7
Summary: This patch exposes the predicate API of internalize pass to OCaml.
Reviewed By: jvillard
Differential Revision: D27188305
fbshipit-source-id: d53bf5871
Summary:
LLVMGetInitializer returns nullptr in case there is no
initializer. There is not much that can be done with nullptr in OCaml,
not even test if it is null. Also, there does not seem to be a C or
OCaml API to test if there is an initializer. So this diff changes
Llvm.global_initializer to return an option.
Reviewed By: jvillard
Differential Revision: D27188302
fbshipit-source-id: 3474ec840
Summary:
There are several enum values that have been added to LLVM-C that are
missing from the OCaml bindings.
Reviewed By: jvillard
Differential Revision: D27188299
fbshipit-source-id: 215f15469
Summary:
Add thin shims to OCaml interfaces to provide access to DebugLoc info
for Instructions, GlobalVariables and Functions.
Reviewed By: jvillard
Differential Revision: D27188296
fbshipit-source-id: 52129f957
Josh Berdine