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Make the maximum number of backtrace frames configurable. #499

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Merged
PiotrSikora merged 1 commit into from
Feb 27, 2026
Merged

Make the maximum number of backtrace frames configurable. #499

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5 changes: 5 additions & 0 deletions include/proxy-wasm/limits.h
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Original file line number Diff line number Diff line change
Expand Up @@ -40,3 +40,8 @@
#ifndef PROXY_WASM_HOST_PAIRS_MAX_COUNT
#define PROXY_WASM_HOST_PAIRS_MAX_COUNT 1024
#endif

// Maximum number of frames in Wasm backtrace.
#ifndef PROXY_WASM_HOST_MAX_BACKTRACE_FRAMES_COUNT
#define PROXY_WASM_HOST_MAX_BACKTRACE_FRAMES_COUNT 20
#endif
7 changes: 4 additions & 3 deletions src/v8/v8.cc
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Expand Up @@ -44,9 +44,10 @@ wasm::Engine *engine() {

std::call_once(init, []() {
// Disable the Liftoff compiler to force optimized JIT up-front.
std::string args = absl::StrFormat("--wasm_max_mem_pages=%u --no-liftoff",
PROXY_WASM_HOST_MAX_WASM_MEMORY_SIZE_BYTES /
PROXY_WASM_HOST_WASM_MEMORY_PAGE_SIZE_BYTES);
std::string args = absl::StrFormat(
"--no-liftoff --wasm_max_mem_pages=%u --stack-trace-limit=%u",
PROXY_WASM_HOST_MAX_WASM_MEMORY_SIZE_BYTES / PROXY_WASM_HOST_WASM_MEMORY_PAGE_SIZE_BYTES,
PROXY_WASM_HOST_MAX_BACKTRACE_FRAMES_COUNT);
::v8::V8::SetFlagsFromString(args.c_str(), args.size());
::v8::V8::EnableWebAssemblyTrapHandler(true);

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