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Add ABI tagging to crates, adjust rustc output and runtime stack-frame setup so access to argv works.

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This commit is contained in:
Graydon Hoare 2011-02-22 16:37:01 -08:00
parent 01c2761769
commit af4d6ae76b
12 changed files with 97 additions and 42 deletions
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34
src/boot/be/abi.ml
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@ -110,23 +110,33 @@ let indirect_args_elt_closure = 0;;
(* Current worst case is by vec grow glue *)
let worst_case_glue_call_args = 8;;
(*
* ABI tags used to inform the runtime which sort of frame to set up for new
* spawned functions. FIXME: There is almost certainly a better abstraction to
* use.
*)
let abi_x86_rustboot_cdecl = 1;;
let abi_x86_rustc_fastcall = 2;;
type abi =
{
abi_word_sz: int64;
abi_word_bits: Il.bits;
abi_word_ty: Common.ty_mach;
{
abi_word_sz: int64;
abi_word_bits: Il.bits;
abi_word_ty: Common.ty_mach;
abi_has_pcrel_data: bool;
abi_has_pcrel_code: bool;
abi_tag: int;
abi_n_hardregs: int;
abi_str_of_hardreg: (int -> string);
abi_has_pcrel_data: bool;
abi_has_pcrel_code: bool;
abi_emit_target_specific: (Il.emitter -> Il.quad -> unit);
abi_constrain_vregs: (Il.quad -> (Il.vreg,Bits.t) Hashtbl.t -> unit);
abi_n_hardregs: int;
abi_str_of_hardreg: (int -> string);
abi_emit_fn_prologue: (Il.emitter
-> Common.size (* framesz *)
abi_emit_target_specific: (Il.emitter -> Il.quad -> unit);
abi_constrain_vregs: (Il.quad -> (Il.vreg,Bits.t) Hashtbl.t -> unit);
abi_emit_fn_prologue: (Il.emitter
-> Common.size (* framesz *)
-> Common.size (* callsz *)
-> Common.nabi
-> Common.fixup (* grow_task *)

2
src/boot/be/x86.ml
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@ -1851,6 +1851,8 @@ let (abi:Abi.abi) =
Abi.abi_word_bits = word_bits;
Abi.abi_word_ty = word_ty;
Abi.abi_tag = Abi.abi_x86_rustboot_cdecl;
Abi.abi_has_pcrel_data = false;
Abi.abi_has_pcrel_code = true;

4
src/boot/me/trans.ml
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@ -2727,6 +2727,7 @@ let trans_visitor
[|
Il.Cell new_task;
exit_task_glue_fptr;
(imm (Int64.of_int abi.Abi.abi_tag));
fptr_operand;
callsz
|];
@ -2739,6 +2740,7 @@ let trans_visitor
[|
Il.Cell new_task;
exit_task_glue_fptr;
(imm (Int64.of_int abi.Abi.abi_tag));
fptr_operand;
callsz
|];
@ -6183,6 +6185,8 @@ let trans_visitor
tab_sz cx.ctxt_required_rust_sym_num;
tab_sz cx.ctxt_required_c_sym_num;
tab_sz cx.ctxt_required_lib_num;
Asm.WORD (word_ty_mach, Asm.IMM (Int64.of_int abi.Abi.abi_tag));
|]))
in

3
src/comp/back/abi.rs
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@ -60,6 +60,9 @@ const int worst_case_glue_call_args = 7;
const int n_upcall_glues = 7;
const int abi_x86_rustboot_cdecl = 1;
const int abi_x86_rustc_fastcall = 2;
fn memcpy_glue_name() -> str {
ret "rust_memcpy_glue";
}

4
src/comp/back/x86.rs
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@ -98,12 +98,12 @@ fn rust_activate_glue() -> vec[str] {
* | esi |
* | ebx | <-- current task->rust_sp == current esp
*
*
*
* This is a problem. If we return to "esp <- task->rust_sp" it
* will push esp back down by 5 words. This manifests as a rust
* stack that grows by 5 words on each yield/reactivate. Not
* good.
*
*
* So what we do here is just adjust task->rust_sp up 5 words as
* well, to mirror the movement in esp we're about to
* perform. That way the "esp <- task->rust_sp" we 'ret' to below

13
src/comp/middle/trans.rs
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@ -345,7 +345,8 @@ fn T_crate(type_names tn) -> TypeRef {
T_int(), // size_t main_exit_task_glue_off
T_int(), // int n_rust_syms
T_int(), // int n_c_syms
T_int() // int n_libs
T_int(), // int n_libs
T_int() // uintptr_t abi_tag
));
tn.associate(s, t);
ret t;
@ -4545,7 +4546,7 @@ fn trans_exit_task_glue(@crate_ctxt cx) {
let vec[ValueRef] V_args = vec();
auto llfn = cx.glues.exit_task_glue;
let ValueRef lltaskptr = llvm.LLVMGetParam(llfn, 0u);
let ValueRef lltaskptr = llvm.LLVMGetParam(llfn, 3u);
auto fcx = @rec(llfn=llfn,
lltaskptr=lltaskptr,
llenv=C_null(T_opaque_closure_ptr(cx.tn)),
@ -4596,7 +4597,8 @@ fn create_crate_constant(@crate_ctxt cx) {
exit_task_glue_off, // size_t main_exit_task_glue_off
C_null(T_int()), // int n_rust_syms
C_null(T_int()), // int n_c_syms
C_null(T_int()) // int n_libs
C_null(T_int()), // int n_libs
C_int(abi.abi_x86_rustc_fastcall) // uintptr_t abi_tag
));
llvm.LLVMSetInitializer(cx.crate_ptr, crate_val);
@ -4810,7 +4812,10 @@ fn make_glues(ModuleRef llmod, type_names tn) -> @glue_fns {
* this is the signature required to retrieve it.
*/
exit_task_glue = decl_cdecl_fn(llmod, abi.exit_task_glue_name(),
T_fn(vec(T_taskptr(tn)),
T_fn(vec(T_int(),
T_int(),
T_int(),
T_taskptr(tn)),
T_void())),
upcall_glues =

8
src/rt/rust.cpp
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@ -78,7 +78,7 @@ command_line_args : public dom_owned<command_line_args>
extern "C" CDECL int
rust_start(uintptr_t main_fn, rust_crate const *crate, int argc,
char **argv) {
char **argv) {
rust_srv *srv = new rust_srv();
rust_kernel *kernel = new rust_kernel(srv);
@ -87,7 +87,8 @@ rust_start(uintptr_t main_fn, rust_crate const *crate, int argc,
rust_dom *dom = handle->referent();
command_line_args *args = new (dom) command_line_args(dom, argc, argv);
dom->log(rust_log::DOM, "startup: %d args", args->argc);
dom->log(rust_log::DOM, "startup: %d args in 0x%" PRIxPTR,
args->argc, (uintptr_t)args->args);
for (int i = 0; i < args->argc; i++) {
dom->log(rust_log::DOM,
"startup: arg[%d] = '%s'", i, args->argv[i]);
@ -99,7 +100,8 @@ rust_start(uintptr_t main_fn, rust_crate const *crate, int argc,
uintptr_t main_args[4] = {0, 0, 0, (uintptr_t)args->args};
dom->root_task->start(crate->get_exit_task_glue(),
main_fn, (uintptr_t)&main_args, sizeof(main_args));
crate->abi_tag, main_fn,
(uintptr_t)&main_args, sizeof(main_args));
int ret = dom->start_main_loop();
delete args;
kernel->destroy_domain(dom);

6
src/rt/rust_internal.h
View File

@ -88,6 +88,10 @@ static size_t const TIME_SLICE_IN_MS = 10;
static intptr_t const CONST_REFCOUNT = 0x7badface;
// ABI tags for rust_start, rust_task::start and friends.
static uintptr_t const ABI_X86_RUSTBOOT_CDECL = 1;
static uintptr_t const ABI_X86_RUSTC_FASTCALL = 2;
// This accounts for logging buffers.
static size_t const BUF_BYTES = 2048;
@ -241,6 +245,8 @@ public:
size_t n_c_syms;
size_t n_libs;
uintptr_t abi_tag;
// Crates are immutable, constructed by the compiler.
uintptr_t get_image_base() const;

52
src/rt/rust_task.cpp
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@ -123,6 +123,7 @@ rust_task::~rust_task()
void
rust_task::start(uintptr_t exit_task_glue,
uintptr_t spawnee_abi,
uintptr_t spawnee_fn,
uintptr_t args,
size_t callsz)
@ -147,39 +148,46 @@ rust_task::start(uintptr_t exit_task_glue,
// The exit_task_glue frame we synthesize above the frame we activate:
*spp-- = (uintptr_t) 0; // closure-or-obj
*spp-- = (uintptr_t) this; // task
*spp-- = (uintptr_t) 0; // output
*spp-- = (uintptr_t) 0; // retpc
*spp-- = (uintptr_t) 0x0; // output
*spp-- = (uintptr_t) 0x0; // retpc
uintptr_t exit_task_frame_base;
for (size_t j = 0; j < n_callee_saves; ++j) {
if (spawnee_abi == ABI_X86_RUSTBOOT_CDECL) {
for (size_t j = 0; j < n_callee_saves; ++j) {
// We want 'frame_base' to point to the old fp in this (exit-task)
// frame, because we're going to inject this frame-pointer into the
// callee-save frame pointer value in the *next* (spawnee) frame. A
// cheap trick, but this means the spawnee frame will restore the
// proper frame pointer of the glue frame as it runs its epilogue.
if (j == callee_save_fp)
exit_task_frame_base = (uintptr_t)spp;
// We want 'frame_base' to point to the old fp in this (exit-task)
// frame, because we're going to inject this frame-pointer into
// the callee-save frame pointer value in the *next* (spawnee)
// frame. A cheap trick, but this means the spawnee frame will
// restore the proper frame pointer of the glue frame as it runs
// its epilogue.
if (j == callee_save_fp)
exit_task_frame_base = (uintptr_t)spp;
*spp-- = 0;
*spp-- = 0;
}
*spp-- = (uintptr_t) dom->root_crate; // crate ptr
*spp-- = (uintptr_t) 0; // frame_glue_fns
}
*spp-- = (uintptr_t) dom->root_crate; // crate ptr
*spp-- = (uintptr_t) 0; // frame_glue_fns
// Copy args from spawner to spawnee.
if (args) {
uintptr_t *src = (uintptr_t *)args;
src += 1; // spawn-call output slot
src += 1; // spawn-call task slot
src += 1; // spawn-call closure-or-obj slot
// Undo previous sp-- so we're pointing at the last word pushed.
++spp;
// Memcpy all but the task, output and env pointers
callsz -= (3 * sizeof(uintptr_t));
spp = (uintptr_t*) (((uintptr_t)spp) - callsz);
memcpy(spp, src, callsz);
// Move sp down to point to task cell.
// Move sp down to point to last implicit-arg cell (env).
spp--;
} else {
// We're at root, starting up.
@ -188,10 +196,18 @@ rust_task::start(uintptr_t exit_task_glue,
// The *implicit* incoming args to the spawnee frame we're
// activating:
*spp-- = (uintptr_t) 0x0; // closure-or-obj
if (spawnee_abi == ABI_X86_RUSTBOOT_CDECL) {
// in CDECL mode we write the task + outptr to the spawnee stack.
*spp-- = (uintptr_t) this; // task
*spp-- = (uintptr_t) 0; // output addr
} else {
// in FASTCALL mode we don't, the outptr will be in ecx and the task
// in edx, and the activate_glue will make sure to set that up.
I(dom, spawnee_abi == ABI_X86_RUSTC_FASTCALL);
}
*spp-- = (uintptr_t) 0; // closure-or-obj
*spp-- = (uintptr_t) this; // task
*spp-- = (uintptr_t) 0; // output addr
*spp-- = (uintptr_t) exit_task_glue; // retpc
// The context the activate_glue needs to switch stack.

1
src/rt/rust_task.h
View File

@ -56,6 +56,7 @@ rust_task : public maybe_proxy<rust_task>,
~rust_task();
void start(uintptr_t exit_task_glue,
uintptr_t spawnee_abi,
uintptr_t spawnee_fn,
uintptr_t args,
size_t callsz);

11
src/rt/rust_upcall.cpp
View File

@ -559,6 +559,7 @@ extern "C" CDECL rust_task *
upcall_start_task(rust_task *spawner,
rust_task *task,
uintptr_t exit_task_glue,
uintptr_t spawnee_abi,
uintptr_t spawnee_fn,
size_t callsz) {
LOG_UPCALL_ENTRY(spawner);
@ -570,7 +571,8 @@ upcall_start_task(rust_task *spawner,
", spawnee 0x%" PRIxPTR
", callsz %" PRIdPTR ")", task->name, task, exit_task_glue,
spawnee_fn, callsz);
task->start(exit_task_glue, spawnee_fn, spawner->rust_sp, callsz);
task->start(exit_task_glue, spawnee_abi, spawnee_fn,
spawner->rust_sp, callsz);
return task;
}
@ -623,6 +625,7 @@ extern "C" CDECL maybe_proxy<rust_task> *
upcall_start_thread(rust_task *task,
rust_proxy<rust_task> *child_task_proxy,
uintptr_t exit_task_glue,
uintptr_t spawnee_abi,
uintptr_t spawnee_fn,
size_t callsz) {
LOG_UPCALL_ENTRY(task);
@ -630,9 +633,11 @@ upcall_start_thread(rust_task *task,
rust_handle<rust_task> *child_task_handle = child_task_proxy->handle();
task->log(rust_log::UPCALL | rust_log::MEM | rust_log::TASK,
"exit_task_glue: " PTR ", spawnee_fn " PTR
", callsz %" PRIdPTR ")", exit_task_glue, spawnee_fn, callsz);
", callsz %" PRIdPTR ")",
exit_task_glue, spawnee_fn, callsz);
rust_task *child_task = child_task_handle->referent();
child_task->start(exit_task_glue, spawnee_fn, task->rust_sp, callsz);
child_task->start(exit_task_glue, spawnee_abi, spawnee_fn,
task->rust_sp, callsz);
#if defined(__WIN32__)
HANDLE thread;
thread = CreateThread(NULL, 0, rust_thread_start, child_task->dom, 0,

1
src/rt/test/rust_test_runtime.cpp
View File

@ -54,6 +54,7 @@ rust_task_test::worker::run() {
kernel->create_domain(crate, "test");
rust_dom *domain = handle->referent();
domain->root_task->start(crate->get_exit_task_glue(),
ABI_X86_RUSTBOOT_CDECL,
(uintptr_t)&task_entry, (uintptr_t)NULL, 0);
domain->start_main_loop();
kernel->destroy_domain(domain);