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[lldb] Enable SanitizersAllocationTraces=tagged in darwin-mte-launcher (#186326)

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Collect allocation traces for tagged memory when using the
`darwin-mte-launcher` to help debug MTE crashes.
This commit is contained in:
Jonas Devlieghere 2026-03-13 16:14:41 -07:00 committed by GitHub
parent 8121900494
commit 7449009719
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GPG Key ID: B5690EEEBB952194
1 changed files with 19 additions and 8 deletions
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27
lldb/tools/darwin-mte-launcher/darwin-mte-launcher.cpp
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@ -14,6 +14,24 @@
using namespace llvm;
static std::vector<const char *> get_extended_env(const char *envp[]) {
// Copy over the current environment.
std::vector<const char *> new_envp;
for (const char **e = envp; *e; ++e)
new_envp.push_back(*e);
// Python's allocator (pymalloc) is not aware of Memory Tagging Extension
// (MTE) and crashes.
// https://bugs.python.org/issue43593
new_envp.push_back("PYTHONMALLOC=malloc");
// Collect allocation traces for tagged memory.
new_envp.push_back("SanitizersAllocationTraces=tagged");
new_envp.push_back(nullptr);
return new_envp;
}
int main(int argc, const char *argv[], const char *envp[]) {
const char *program = argv[1];
const char **new_args = &argv[1];
@ -45,14 +63,7 @@ int main(int argc, const char *argv[], const char *envp[]) {
return EXIT_FAILURE;
}
// Python's allocator (pymalloc) is not aware of Memory Tagging Extension
// (MTE) and crashes.
// https://bugs.python.org/issue43593
std::vector<const char *> new_envp;
for (const char **e = envp; *e; ++e)
new_envp.push_back(*e);
new_envp.push_back("PYTHONMALLOC=malloc");
new_envp.push_back(nullptr);
std::vector<const char *> new_envp = get_extended_env(envp);
pid_t pid;
ret = posix_spawn(&pid, program, /*file_actions=*/nullptr, &attr,