v2.1: feat: deplete compute meter for vm errors (backport of #3751)

programs/bpf_loader/src/lib.rs

@@ -1432,6 +1432,24 @@ pub fn execute<'a, 'b: 'a>(
                 Err(Box::new(error) as Box<dyn std::error::Error>)
             }
             ProgramResult::Err(mut error) => {
+                if invoke_context
+                    .get_feature_set()
+                    .is_active(&solana_feature_set::apply_cost_tracker_during_replay::id())
+                    && !matches!(error, EbpfError::SyscallError(_))
+                {
+                    // when an exception is thrown during the execution of a
+                    // Basic Block (e.g., a null memory dereference or other
+                    // faults), determining the exact number of CUs consumed
+                    // up to the point of failure requires additional effort
+                    // and is unnecessary since these cases are rare.
+                    //
+                    // In order to simplify CU tracking, simply consume all
+                    // remaining compute units so that the block cost
+                    // tracker uses the full requested compute unit cost for
+                    // this failed transaction.
+                    invoke_context.consume(invoke_context.get_remaining());
+                }
+
                 if direct_mapping {
                     if let EbpfError::AccessViolation(
                         AccessType::Store,

programs/sbf/Cargo.toml

@@ -153,6 +153,7 @@ members = [
     "rust/custom_heap",
     "rust/dep_crate",
     "rust/deprecated_loader",
+    "rust/divide_by_zero",
     "rust/dup_accounts",
     "rust/error_handling",
     "rust/external_spend",

programs/sbf/rust/divide_by_zero/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "solana-sbf-rust-divide-by-zero"
+version = { workspace = true }
+description = { workspace = true }
+authors = { workspace = true }
+repository = { workspace = true }
+homepage = { workspace = true }
+license = { workspace = true }
+edition = { workspace = true }
+
+[dependencies]
+solana-program = { workspace = true }
+
+[lib]
+crate-type = ["cdylib"]

programs/sbf/rust/divide_by_zero/src/lib.rs

@@ -0,0 +1,27 @@
+//! Example/test program to trigger vm error by dividing by zero
+
+#![feature(asm_experimental_arch)]
+
+extern crate solana_program;
+use {
+    solana_program::{account_info::AccountInfo, entrypoint::ProgramResult, pubkey::Pubkey},
+    std::arch::asm,
+};
+
+solana_program::entrypoint_no_alloc!(process_instruction);
+fn process_instruction(
+    _program_id: &Pubkey,
+    _accounts: &[AccountInfo],
+    _instruction_data: &[u8],
+) -> ProgramResult {
+    unsafe {
+        asm!(
+            "
+            mov64 r0, 0
+            mov64 r1, 0
+            div64 r0, r1
+        "
+        );
+    }
+    Ok(())
+}